Android SharedPreferences not removed until app is restarted

Android SharedPreferences not removed until app is restarted - android

I'm stucked with this problem.
In my app I use SharedPrefManager as a singleton class, in order to keep some "session" information. In this simple example app I just save the user's name and a boolean that indicates whether or not the user is logged in to skip the login screen if already logged, or to show it if not.
When starting the app, after the splashscreen, the LoginActivity is started.
At this point, if the user has already logged in before (without logging out later, that means the boolean value of isuseradded SharedPreferences variable is true), the user is redirected to the MainActivity, otherwise he sees the login form, where he can insert username and password and make a REST API request to a remote server.
If the login is correct, the MainActivity starts and simply shows the name of the user, taken from the response JSON obtained by the remote login REST API call.
Now, here is my problem: I want to implement a simple logout feature that deletes (or changes, as in this test app) all the information stored by SharedPreferences and takes the user back to the LoginActivity.
But when I click logout, the values for SharedPreferences are updated only in MainActivity, while in LoginActivity they remain the same as before, so when the user is redirected to LoginActivity, the isusedadded shared preference is still true, and the user is redirected back to MainActivity.
But SharedPrefManager class is a singleton, so its values should be the same in every part of the app, because only one instance of it exists, so why do I have this behavior?
You can test the app by downloading the full app code here and using these credentials for login:
Username: 52346
Password: 32fjueM1 (case sensitive)
Here follows my code.
App.java:
package mypackage.sharedprefapp;
import android.app.Application;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;
public class App extends Application
{
private RequestQueue mRequestQueue;
private static App mInstance;
#Override
public void onCreate()
{
super.onCreate();
mInstance = this;
}
public static synchronized App getInstance()
{
return mInstance;
}
// This method returns the queue containing GET/POST requests
public RequestQueue getRequestQueue()
{
if(mRequestQueue == null)
{
mRequestQueue = Volley.newRequestQueue(getApplicationContext());
}
return mRequestQueue;
}
// This method adds a GET/POST request to the queue of requests
public <T> void addToRequestQueue(Request<T> req)
{
getRequestQueue().add(req);
}
}
SplashActivity.java
package mypackage.sharedprefapp;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
public class SplashActivity extends AppCompatActivity
{
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Intent intent = new Intent(this, LoginActivity.class);
startActivity(intent);
finish();
}
}
LoginActivity.java
package mypackage.sharedprefapp;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
public class LoginActivity extends AppCompatActivity
{
private static final String TAG = "LoginActivity";
Button loginButton;
EditText userIDInput, passwordInput;
TextView loginErrorMsg, title;
LinearLayout bgLayout;
SharedPrefManager sharedPrefManager;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
sharedPrefManager = SharedPrefManager.getInstance(this);
Log.i("HERE", "LoginActivity onCreate: "+sharedPrefManager.isUserAdded());
}
#Override
protected void onResume()
{
super.onResume();
sharedPrefManager = SharedPrefManager.getInstance(this);
Log.i("HERE", "LoginActivity onResume: "+sharedPrefManager.getUserName());
// if the user is already logged in
if(sharedPrefManager.isUserAdded())
{
Log.i(TAG, "User is logged in");
// if the device is connected to the internet
if(Utils.isDeviceOnline(this))
{
Intent intent = new Intent(this, MainActivity.class);
startActivity(intent);
finish();
}
// if the device is offline
else
{
Log.i(TAG, "Internet connection is not available");
}
}
// if the user is not logged in
else
{
Log.i(TAG, "User is NOT logged in");
setContentView(R.layout.activity_login);
title = (TextView) findViewById(R.id.title);
loginErrorMsg = (TextView) findViewById(R.id.login_errorText);
userIDInput = (EditText) findViewById(R.id.login_id_paziente);
passwordInput = (EditText) findViewById(R.id.login_password);
loginButton = (Button) findViewById(R.id.login_submitButton);
bgLayout = (LinearLayout) findViewById(R.id.login_parentLayout);
// Bind a custom click listener to the login button
loginButton.setOnClickListener(new LoginButtonClickListener(this));
// Bind a custom click listener to the background layout
// so that the soft keyboard is dismissed when clicking on the background
bgLayout.setOnClickListener(new LoginBackgroundClickListener());
}
}
}
LoginButtonClickListener.java
package mypackage.sharedprefapp;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.HashMap;
import java.util.Map;
public class LoginButtonClickListener implements View.OnClickListener
{
private Context context;
private SharedPrefManager sharedPrefManager;
public LoginButtonClickListener(Context c)
{
this.context = c;
}
#Override
public void onClick(View v)
{
sharedPrefManager = SharedPrefManager.getInstance(context);
// if internet connection is available
if(Utils.isDeviceOnline(context))
{
// Verify login credentials from DB
doLogin();
}
else {}
}
// check login data with REST API
private void doLogin()
{
final String paziente_id = ((EditText)((Activity)context).findViewById(R.id.login_id_paziente)).getText().toString();
final String paziente_password = ((EditText)((Activity)context).findViewById(R.id.login_password)).getText().toString();
StringRequest stringRequest = new StringRequest
(
Request.Method.POST,
"http://www.stefanopace.net/iCAREServer/api/v1/index.php/login",
new Response.Listener<String>()
{
#Override
public void onResponse(String s)
{
try
{
JSONObject obj = new JSONObject(s);
if(!obj.getBoolean("error"))
{
String name = obj.getString("nome");
sharedPrefManager.addUser(name);
Intent intent = new Intent(context, MainActivity.class);
context.startActivity(intent);
}
else
{
Toast.makeText(context, "Error on JSON response", Toast.LENGTH_LONG).show();
}
}
catch(JSONException e)
{
e.printStackTrace();
}
}
},
new Response.ErrorListener()
{
#Override
public void onErrorResponse(VolleyError volleyError)
{
Toast.makeText(context, volleyError.getMessage(), Toast.LENGTH_LONG).show();
}
})
{
#Override
protected Map<String, String> getParams() throws AuthFailureError
{
Map<String, String> params = new HashMap<>();
params.put("id_paziente", paziente_id);
params.put("password", paziente_password);
return params;
}
};
App.getInstance().addToRequestQueue(stringRequest);
}
}
LoginBackgroundClickListener.java
package mypackage.sharedprefapp;
import android.view.View;
public class LoginBackgroundClickListener implements View.OnClickListener
{
#Override
public void onClick(View v)
{
Utils.hideSoftKeyboard(v);
}
}
MainActivity.java
package mypackage.sharedprefapp;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity
{
private static final String TAG = "MainActivity";
TextView personName;
SharedPrefManager sharedPrefManager;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
sharedPrefManager = SharedPrefManager.getInstance(this);
setContentView(R.layout.activity_main);
personName = (TextView) findViewById(R.id.person_name);
Log.i(TAG, "Value: "+sharedPrefManager.isUserAdded());
personName.setText(sharedPrefManager.getUserName());
}
#Override
protected void onResume()
{
super.onResume();
sharedPrefManager = SharedPrefManager.getInstance(this);
Log.w("MainActivity", "onResume");
}
#Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.mainmenu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch(item.getItemId())
{
// Logout button has been pressed
case R.id.logout_action:
{
Log.i("Logout pressed", "Logout button has been pressed!");
final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
alertDialogBuilder.setMessage("Are you sure you want to logout?");
alertDialogBuilder.setPositiveButton
(
"Yes",
new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface arg0, int arg1)
{
boolean success = sharedPrefManager.removeDataFromSharedPreference();
// if the operation is OK
if(success)
{
// go to the login activity
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
startActivity(intent);
finish();
}
else
{
Toast.makeText(getApplicationContext(), "Error during logout", Toast.LENGTH_LONG).show();
}
}
}
);
alertDialogBuilder.setNegativeButton
(
"No",
new DialogInterface.OnClickListener()
{
#Override
public void onClick(DialogInterface arg0, int arg1)
{}
}
);
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
return true;
}
}
return super.onOptionsItemSelected(item);
}
}
SharedPrefManager.java
package mypackage.sharedprefapp;
import android.content.Context;
import android.content.SharedPreferences;
public final class SharedPrefManager
{
private static final String TAG = "SharedPrefManager";
private SharedPreferences sharedPreferences;
private SharedPreferences.Editor editor;
private static SharedPrefManager mInstance;
private static final String SHARED_PREF = "sharedprefs";
private static final String KEY_IS_USER_ADDED = "isuseradded";
public static final String KEY_USER_NAME = "username";
private SharedPrefManager(Context context)
{
sharedPreferences = context.getSharedPreferences(SHARED_PREF, Context.MODE_PRIVATE);
editor = sharedPreferences.edit();
sharedPreferences.registerOnSharedPreferenceChangeListener(new LocalSharedPreferencesChangeListener());
}
public static SharedPrefManager getInstance(Context context)
{
if(mInstance == null)
{
mInstance = new SharedPrefManager(context);
}
return mInstance;
}
// add an user to the shared preferences
public boolean addUser(String name)
{
editor.putString(KEY_USER_NAME, name);
editor.putBoolean(KEY_IS_USER_ADDED, true);
return editor.commit();
}
public boolean removeDataFromSharedPreference()
{
editor.putString(KEY_USER_NAME, "HELLO");
editor.putBoolean(KEY_IS_USER_ADDED, false);
return editor.commit();
}
public String getUserName()
{
return sharedPreferences.getString(KEY_USER_NAME, "");
}
public boolean isUserAdded()
{
return sharedPreferences.getBoolean(KEY_IS_USER_ADDED, false);
}
}
Utils.java
package mypackage.sharedprefapp;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.support.v7.app.AlertDialog;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
public class Utils
{
public static void hideSoftKeyboard(View view)
{
InputMethodManager inputMethodManager = (InputMethodManager) view.getContext().getSystemService(Activity.INPUT_METHOD_SERVICE);
inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
}
// This method checks if the device is connected to the Internet
public static boolean isDeviceOnline(final Context context)
{
final ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
if(connectivityManager != null)
{
final NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
boolean isOnline = (networkInfo != null && networkInfo.isConnectedOrConnecting());
if(!isOnline)
{
AlertDialog.Builder alertDialog = new AlertDialog.Builder(context);
alertDialog.setCancelable(false);
alertDialog.setTitle("Error");
alertDialog.setMessage("Internet is not available");
alertDialog.setPositiveButton("Try again", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
// Reload the Activity
Intent intent = ((Activity) context).getIntent();
((Activity) context).finish();
context.startActivity(intent);
}
});
alertDialog.show();
}
return isOnline;
}
return false;
}
}
LocalSharedPreferencesChangeListener
package mypackage.sharedprefapp;
import android.content.SharedPreferences;
import android.util.Log;
public class LocalSharedPreferencesChangeListener implements SharedPreferences.OnSharedPreferenceChangeListener
{
#Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key)
{
Log.i("HERE", key);
}
}
activity_login.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context=".LoginActivity"
android:padding="0dp">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/scrollView"
android:layout_gravity="center_horizontal">
<LinearLayout
android:id="#+id/login_parentLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:clickable="true">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#mipmap/ic_launcher"
android:layout_gravity="center_horizontal"
android:layout_marginTop="50dp"
android:layout_marginBottom="30dp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/app_name"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
android:layout_marginBottom="30dp"
android:singleLine="false"
android:padding="5dp"
android:textSize="30sp" />
<EditText
android:id="#+id/login_id_paziente"
android:layout_width="match_parent"
android:layout_height="40dp"
android:inputType="number"
android:ems="10"
android:hint="Username"
android:textColor="#android:color/black"
android:textColorHint="#android:color/darker_gray"
android:singleLine="true"
android:minLines="1"
android:gravity="center_horizontal"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:focusableInTouchMode="true"
android:focusable="true" />
<EditText
android:id="#+id/login_password"
android:layout_width="match_parent"
android:layout_height="40dp"
android:hint="Password"
android:textColorHint="#android:color/darker_gray"
android:inputType="textPassword"
android:ems="10"
android:textColor="#android:color/black"
android:maxLines="1"
android:singleLine="true"
android:layout_marginTop="20dp"
android:gravity="center_horizontal"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:focusableInTouchMode="true"
android:focusable="true" />
<TextView
android:id="#+id/login_errorText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Login error"
android:textColor="#android:color/holo_red_dark"
android:layout_gravity="center_horizontal"
android:gravity="center_horizontal"
android:singleLine="false"
android:padding="5dp"
android:textSize="20sp"
android:layout_margin="10dp"
android:visibility="invisible" />
<Button
android:id="#+id/login_submitButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Login"
android:textSize="20sp"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp" />
</LinearLayout>
</ScrollView>
</LinearLayout>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="mypackage.sharedprefapp.MainActivity">
<TextView
android:id="#+id/person_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:textSize="25sp"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
splashscreen.xml (in drawable resources folder)
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#android:color/holo_green_dark"/>
<item>
<bitmap
android:gravity="center"
android:src="#mipmap/ic_launcher"/>
</item>
</layer-list>
mainmenu.xml (in res/menu resource folder)
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item android:id="#+id/logout_action"
android:title="Logout"
app:showAsAction="always" />
</menu>
styles.xml
<resources>
...
<style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
<item name="android:windowBackground">#drawable/splashscreen</item>
</style>
</resources>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="mypackage.sharedprefapp">
<!-- Needs internet to connect to Google Services -->
<uses-permission android:name="android.permission.INTERNET" />
<!-- Permission to check internet connection state -->
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:name=".App"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".SplashActivity"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:theme="#style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:screenOrientation="portrait"
android:theme="#style/AppTheme" />
<activity
android:name=".LoginActivity"
android:label="#string/app_name"
android:process=":other_process"
android:screenOrientation="portrait"
android:theme="#style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.LOGIN_ACTION" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
build.gradle (Module: app)
dependencies {
...
compile 'com.android.volley:volley:1.0.0'
}
Thank you!

Just call editor.clear();
and editor.commit();
is enough to delete all data from shared preference.

Because onResume, you keep on instantiating a new SharedPrefManager
sharedPrefManager = new SharedPrefManager(this);
Modify your SharedPrefManager so that it only gives one instance at all times OR make sure that you are referring to the same object when you return to LoginActivity.

SharedPreferences is permanent storage, you can clear
SharedPreferences.Editor.clear().commit();
alternate solution
you want once app close clear entire values,try Application singleton class

#Ciammarica you can call this code on click of Logout button, hope this can help you..you can set in logout button boolean value false..
SessionManager.setUserLoggedIn(YourActivity.this, false); SessionManager.clearAppCredential(YourActivity.this);

I Changed my code in order to have only one instance of SharedPrefManager class.
This is my App singleton class:
public class App extends Application
{
private static App mInstance;
private SharedPrefManager sharedPrefManager;
#Override
public void onCreate() {
super.onCreate();
mInstance = this;
sharedPrefManager = new SharedPrefManager(this);
}
public SharedPrefManager getSharedPrefManager(){
return sharedPrefManager;
}
public static synchronized App getInstance(){
return mInstance;
}
}
Then from other classes I get the instance by calling
SharedPrefManager sharedPrefManager = App.getInstance().getSharedPrefManager();
Now, with this change, the onSharedPreferenceChanged() event is triggered only once, so this is better than before, but the "delayed" behavior is still there... I mean, even if I use editor.clear(); and editor.commit(); methods, the values are updated but I can see them only if I close and open the app again.

I found the problem myself... It didn't like the sharedPrefManager.removeDataFromSharedPreference(); method to be called from inside new DialogInterface.OnClickListener()
I took it in another part of the code and it worked.

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I am uploading video to a localhost webpage. My code is using a Handler (the syntax of which is working in a different class for signup & login to the app.
However when I run the code in the emulator it creates the handler, run the next line, then skips over the code in the handler.post section. (I can see handler appears to be deprecated in the documentation but i'm too far down this road to change now).
Any suggestions would be very much appreciated. (I know there are probably other issues in the code and better ways to do what i'm trying to achieve, I'm just using this as a learning exercise).
Activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<Button
android:id="#+id/captureBtn"
android:layout_width="120dp"
android:layout_height="60dp"
android:layout_centerVertical="true"
android:layout_gravity="bottom"
android:text="Capture Video"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
/>
</RelativeLayout>
build.gradle
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<Button
android:id="#+id/captureBtn"
android:layout_width="120dp"
android:layout_height="60dp"
android:layout_centerVertical="true"
android:layout_gravity="bottom"
android:text="Capture Video"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
/>
</RelativeLayout>
MainActivity
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import android.Manifest;
import android.app.Activity;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
public class MainActivity extends AppCompatActivity {
// Storage Permissions
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
Button Upload;
private final String fileURI = "/storeage/emulated/0/DCIM/Camera/VID_20210424_141744.mp4";
private static final String serverUri = "http://192.168.0.116/racewatch/upload.php";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Upload = findViewById(R.id.captureBtn);
Upload.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (ActivityCompat.checkSelfPermission(getApplicationContext(),
Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
Handler handler = new Handler();
System.out.println("Hi from here");
handler.post(new Runnable() {
#Override
public void run() {
// Start of upload thread
//Creating array for parameters
String[] field = new String[4];
field[0] = "username";
field[1] = "userid";
field[2] = "lat";
field[4] = "lon";
//Creating array for data
String[] data = new String[4];
data[0] = "patsky";
data[1] = "21";
data[2] = "53.6";
data[3] = "-6.1";
// instantiate a client - should be a singleton
OkHttpClient client = new OkHttpClient.Builder()
.connectTimeout(10, TimeUnit.SECONDS)
.readTimeout(10, TimeUnit.SECONDS)
.build();
// /storeage/emulated/0/DCIM/Camera/VID_20210424_141744.mp4
RequestBody requestBody = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart(field[0], data[0])
.addFormDataPart(field[1], data[1])
.addFormDataPart(field[2], data[2])
.addFormDataPart(field[3], data[3])
.addFormDataPart("file", "test.mp4", RequestBody.create(MediaType.parse("video/mp4"), new File(fileURI)))
.build();
Request request = new Request.Builder()
.url(serverUri)
.post(requestBody)
.build();
client.newCall(request).enqueue(new Callback() {
#Override
public void onFailure(final Call call, final IOException e) {
//Toast.makeText(MainActivity.this, "Error in file upload", Toast.LENGTH_SHORT).show();
Log.e("file uuuupload", "exception", e);
}
#Override
public void onResponse(final Call call, final Response response) throws IOException {
String phpans = response.body().string();//reponse body can be only accessed once
//Toast.makeText(MainActivity.this, phpans, Toast.LENGTH_SHORT).show();
System.out.println("Error messssage" + phpans);
if (!response.isSuccessful()) {
//Toast.makeText(MainActivity.this, "File uploaded successfully", Toast.LENGTH_SHORT).show();
System.out.println("Error messaage" + phpans);
}
// Upload successful
}
});
}
});
} else {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{
Manifest.permission.READ_EXTERNAL_STORAGE}, 44);
}
} // end of onClick
});
} // end of onCreate
}
AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.uploadtoserverexample">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:usesCleartextTraffic="true"
android:theme="#style/Theme.UploadToServerExample">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

listview not showing my message after launching activity [duplicate]

This question already has answers here:
FirebaseListAdapter not pushing individual items for chat app - Firebase-Ui 3.1
(2 answers)
Closed 4 years ago.
anyone is thier who can help me ? listview not showing my message after launching activity ,i am trying to create chatting application , i have created chat application successfully , then later for advertising i have added some dependencis and it start to give me error in adapter code ..
first i think something problem in list adapter please check my main activity and other classes
package com.intraday.geeks;
import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.text.format.DateFormat;
import com.firebase.ui.auth.AuthUI;
import com.firebase.ui.database.FirebaseListAdapter;
import com.firebase.ui.database.FirebaseListOptions;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
public class MainActivity extends AppCompatActivity {
private static int SIGN_IN_REQUEST_CODE = 1;
private FirebaseListAdapter<ChatMessage> adapter;
RelativeLayout activity_Main;
FloatingActionButton fab;
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == R.id.menu_sign_out)
{
AuthUI.getInstance().signOut(this).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
Snackbar.make(activity_Main,"You have been signed out.", Snackbar.LENGTH_SHORT).show();
finish();
}
});
}
return true;
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu,menu);
return true;
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == SIGN_IN_REQUEST_CODE)
{
if(resultCode == RESULT_OK)
{
Snackbar.make(activity_Main,"Successfully signed in.Welcome!", Snackbar.LENGTH_SHORT).show();
displayChatMessage();
}
else{
Snackbar.make(activity_Main,"We couldn't sign you in.Please try again later", Snackbar.LENGTH_SHORT).show();
finish();
}
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
activity_Main = (RelativeLayout)findViewById(R.id.layoutmain);
fab=(FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
EditText input =findViewById(R.id.input);
FirebaseDatabase.getInstance().getReference().push().setValue(new ChatMessage(input.getText().toString(),
FirebaseAuth.getInstance().getCurrentUser().getEmail()));
input.setText("");
}
});
if(FirebaseAuth.getInstance().getCurrentUser()==null) {
startActivityForResult(AuthUI.getInstance().createSignInIntentBuilder().build(),SIGN_IN_REQUEST_CODE);
}
else{
Snackbar.make(activity_Main,"Welcome "+FirebaseAuth.getInstance().getCurrentUser().getEmail(),Snackbar.LENGTH_SHORT).show();
//Load content
displayChatMessage();
}
}
private void displayChatMessage() {
ListView listOfMessage = (ListView)findViewById(R.id.list_of_message);
Query query = FirebaseDatabase.getInstance().getReference().child("chats");
FirebaseListOptions<ChatMessage> options =
new FirebaseListOptions.Builder<ChatMessage>()
.setQuery(query, ChatMessage.class)
.setLayout(android.R.layout.simple_list_item_1)
.build();
adapter = new FirebaseListAdapter<ChatMessage>(options)
{
#Override
protected void populateView(View v, ChatMessage model, int position) {
//Get references to the views of list_item.xml
TextView messageText, messageUser, messageTime;
messageText = (TextView) v.findViewById(R.id.message_Text);
messageUser = (TextView) v.findViewById(R.id.message_user);
messageTime = (TextView) v.findViewById(R.id.message_time);
messageText.setText(model.getMessageText());
messageUser.setText(model.getMessageuser());
messageTime.setText(DateFormat.format("dd-MM-yyyy (HH:mm:ss)", model.getMessageTime()));
}
};
listOfMessage.setAdapter(adapter);
}
#Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
#Override
protected void onStop() {
super.onStop();
adapter.stopListening();
}
}
this is my chatMessage class
package com.intraday.geeks;
import java.util.Date;
/**
* Created by Administrator on 6/8/2018.
*/
public class ChatMessage {
private String MessageText;
private String Messageuser;
private Long MessageTime;
public ChatMessage(String messageText, String messageuser) {
this.MessageText = messageText;
this.Messageuser = messageuser;
MessageTime= new Date().getTime();
}
public ChatMessage() {
}
public String getMessageText() {
return MessageText;
}
public void setMessageText(String messageText) {
MessageText = messageText;
}
public String getMessageuser() {
return Messageuser;
}
public void setMessageuser(String messageuser) {
Messageuser = messageuser;
}
public Long getMessageTime() {
return MessageTime;
}
public void setMessageTime(Long messageTime) {
MessageTime = messageTime;
}
}
this is my MainActivity Layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/layoutmain"
android:layout_width="match_parent"
android:background="#drawable/gg"
android:layout_height="match_parent"
tools:context="com.intraday.geeks.MainActivity">
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:src="#drawable/ic_send"
android:id="#+id/fab"
android:tint="#android:color/white"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
app:fabSize="mini"/>
<EditText
android:id="#+id/input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/textInputLayout"
android:layout_alignParentStart="true"
android:hint="message"
android:textColor="#ffff"
android:textColorHint="#ffff"
/>
<android.support.design.widget.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toLeftOf="#id/fab"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:id="#+id/textInputLayout" />
<ListView
android:id="#+id/list_of_message"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true"
android:layout_above="#id/fab"
android:stackFromBottom="true"
android:dividerHeight="20dp"
android:divider="#android:color/transparent"
android:layout_width="match_parent"
android:layout_marginBottom="16dp"
android:layout_height="match_parent"></ListView>
</RelativeLayout>
**this is my list_iteam . xml**
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/scroll"
android:background="#drawable/border_style"
android:orientation="vertical">
<TextView
android:layout_width="fill_parent"
android:layout_height="10dp"
android:id="#+id/message_user"
android:visibility="invisible"/>
<TextView
android:id="#+id/message_time"
android:layout_width="fill_parent"
android:layout_height="18dp"
android:layout_alignParentBottom="#id/message_Text"
android:textColor="#ffff"
android:textSize="15dp"
/>
<TextView
android:id="#+id/message_Text"
android:layout_width="fill_parent"
android:layout_height="50dp"
android:layout_alignParentStart="true"
android:layout_below="#+id/message_time"
android:textAppearance="#style/TextAppearance.AppCompat.Body1"
android:textColor="#ffff"
android:textSize="20sp"
android:textStyle="bold"
tools:layout_editor_absoluteX="0dp"
tools:layout_editor_absoluteY="90dp" />
</RelativeLayout>
this is my Menifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.intraday.geeks">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MyFirebaseMessagingService">
<intent-filter>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>
<!-- This meta-data tag is required to use Google Play Services. -->
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<!-- Include the AdActivity configChanges and theme. -->
<activity
android:name="com.google.android.gms.ads.AdActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
android:theme="#android:style/Theme.Translucent" />
</application>
</manifest>

Add this
#Override
protected void onStart() {
super.onStart();
adapter.startListening();
}
#Override
protected void onStop() {
super.onStop();
adapter.stopListening();
}

connecting WunderBar Relayr toolkit Master module to Android

I am working on a simple android app to do Internet-of-Things functions using the WunderBar Relayr toolkit to have sensors send data back to the android app so as to display the data. I am trying to emulate the sample temperature display app as shown in the wunderbar relayr website as well as the relayr GitHub repository so as to understand how the sensor and app communicate.
I am able to activate the master module as well as the humidity/temperature sensor, but even though the sensors work fine, the readings in the app is shown to be constant for example: 22*C. My app does not seem to be collecting the data
I can log in using my credentials, but then instead of my name being displayed, it displays another name.How can I resolve this issue?
The code is shown below.
ThermometerDemoActivity.java:
package com.vasansdomain.pavan.thermometer;
//import the Android classes we will need
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
//import the relayr SDK
import io.relayr.RelayrSdk;
import io.relayr.model.DeviceModel;
import io.relayr.model.Reading;
import io.relayr.model.Transmitter;
import io.relayr.model.TransmitterDevice;
import io.relayr.model.User;
import rx.Observable;
import rx.Observer;
import rx.Subscriber;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Func1;
import rx.schedulers.Schedulers;
import rx.subscriptions.Subscriptions;
public class ThermometerDemoActivity extends ActionBarActivity
{
private TextView mWelcomeTextView;
private TextView mTemperatureValueTextView;
private TextView mTemperatureNameTextView;
private TransmitterDevice mDevice;
private Subscription mUserInfoSubscription = Subscriptions.empty();
private Subscription mTemperatureDeviceSubscription = Subscriptions.empty();
/**
* Once the Activity has been started, the onCreate method will be called
* #param savedInstanceState
*/
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
View view = View.inflate(this, R.layout.activity_thermometer_demo, null);
mWelcomeTextView = (TextView) view.findViewById(R.id.txt_welcome);
mTemperatureValueTextView = (TextView) view.findViewById(R.id.txt_temperature_value);
mTemperatureNameTextView = (TextView) view.findViewById(R.id.txt_temperature_name);
setContentView(view);
//we use the relayr SDK to see if the user is logged in by caling the isUserLoggedIn function
if (RelayrSdk.isUserLoggedIn())
{
updateUiForALoggedInUser();
}
else
{
updateUiForANonLoggedInUser();
logIn();
}
}
/**
* When Android is ready to draw any menus it initiates the
* "prepareOptionsMenu" event, this method is caled to handle that
* event.
* #param menu
* #return
*/
#Override
public boolean onPrepareOptionsMenu(Menu menu)
{
//remove any previous items from the menu
menu.clear();
//Check to see if the user is logged in
if (RelayrSdk.isUserLoggedIn())
{
//if the user is logged in, we ask Android to draw the menu
//we defined earlier in the thermometer_demo_logged_in.xml
//file
getMenuInflater().inflate(R.menu.thermometer_demo_logged_in, menu);
}
else
{
//otherwise we return the
//thermometer_demo_not_logged_in.xml file
getMenuInflater().inflate(R.menu.thermometer_demo_not_logged_in, menu);
}
//we must return this, so that any other classes interested in
//the prepare menu event can do something.
return super.onPrepareOptionsMenu(menu);
}
/**
* When a menu item is selected, we see which item was called and
* decide what to do according to the item.
*/
#Override
public boolean onOptionsItemSelected(MenuItem item)
{
//if the user selected login
if (item.getItemId() == R.id.action_log_in)
{
//we call the login method on the relayr SDK
logIn();
return true;
}
else if (item.getItemId() == R.id.action_log_out)
{
//otherwise we call the logout method defined later in this class
logOut();
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* The LogIn method definition
*/
private void logIn() {
RelayrSdk.logIn(this).observeOn(AndroidSchedulers.mainThread()).subscribe(new Observer<User>() {
#Override
public void onCompleted() {
}
#Override
public void onError(Throwable e) {
Toast.makeText(ThermometerDemoActivity.this, R.string.unsuccessfully_logged_in, Toast.LENGTH_SHORT).show();
updateUiForANonLoggedInUser();
}
#Override
public void onNext(User user) {
Toast.makeText(ThermometerDemoActivity.this, R.string.successfully_logged_in, Toast.LENGTH_SHORT).show();
invalidateOptionsMenu();
updateUiForALoggedInUser();
}
});
}
/**
* Called when the user logs out
*/
private void logOut()
{
unSubscribeToUpdates();
//call the logOut method on the relayr SDK
RelayrSdk.logOut();
//call the invalidateOptionsMenu this is defined in the
//Activity class and is used to reset the menu option
invalidateOptionsMenu();
//use the Toast library to display a message to the user
Toast.makeText(this, R.string.successfully_logged_out, Toast.LENGTH_SHORT).show();
updateUiForANonLoggedInUser();
}
private void updateUiForANonLoggedInUser()
{
mTemperatureValueTextView.setVisibility(View.GONE);
mTemperatureNameTextView.setVisibility(View.GONE);
mWelcomeTextView.setText(R.string.hello_relayr);
}
private void updateUiForALoggedInUser()
{
mTemperatureValueTextView.setVisibility(View.VISIBLE);
mTemperatureNameTextView.setVisibility(View.VISIBLE);
loadUserInfo();
}
private void loadUserInfo()
{
mUserInfoSubscription = RelayrSdk.getRelayrApi().getUserInfo().subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Subscriber<User>() {
#Override
public void onCompleted() {
}
#Override
public void onError(Throwable e) {
Toast.makeText(ThermometerDemoActivity.this, R.string.something_went_wrong, Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
#Override
public void onNext(User user) {
String hello = String.format(getString(R.string.hello), user.getName());
mWelcomeTextView.setText(hello);
loadTemperatureDevice(user);
}
});
}
private void loadTemperatureDevice(User user)
{
mTemperatureDeviceSubscription = RelayrSdk.getRelayrApi().getTransmitters(user.id).flatMap(new Func1<List<Transmitter>, Observable<List<TransmitterDevice>>>() {
#Override
public Observable<List<TransmitterDevice>> call(List<Transmitter> transmitters) {
// This is a naive implementation. Users may own many WunderBars or other
// kinds of transmitter.
if (transmitters.isEmpty())
return Observable.from(new ArrayList<List<TransmitterDevice>>());
return RelayrSdk.getRelayrApi().getTransmitterDevices(transmitters.get(0).id);
}
}).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(new Subscriber<List<TransmitterDevice>>() {
#Override
public void onCompleted() {
}
#Override
public void onError(Throwable e) {
Toast.makeText(ThermometerDemoActivity.this, R.string.something_went_wrong, Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
#Override
public void onNext(List<TransmitterDevice> devices) {
for (TransmitterDevice device : devices) {
if (device.model.equals(DeviceModel.TEMPERATURE_HUMIDITY.getId())) {
subscribeForTemperatureUpdates(device);
return;
}
}
}
});
}
#Override
protected void onPause()
{
super.onPause();
unSubscribeToUpdates();
}
private void unSubscribeToUpdates()
{
if (!mUserInfoSubscription.isUnsubscribed())
mUserInfoSubscription.unsubscribe();
if (!mTemperatureDeviceSubscription.isUnsubscribed())
mTemperatureDeviceSubscription.unsubscribe();
if (mDevice != null)
RelayrSdk.getWebSocketClient().unSubscribe(mDevice.id);
}
#Override
protected void onResume()
{
super.onResume();
if (RelayrSdk.isUserLoggedIn())
{
updateUiForALoggedInUser();
}
else
{
updateUiForANonLoggedInUser();
}
}
private void subscribeForTemperatureUpdates(TransmitterDevice device)
{
mDevice = device;
RelayrSdk.getWebSocketClient().subscribe(device).observeOn(AndroidSchedulers.mainThread()).subscribe(new Subscriber<Reading>() {
#Override
public void onCompleted() {
}
#Override
public void onError(Throwable e) {
Toast.makeText(ThermometerDemoActivity.this, R.string.something_went_wrong, Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
#Override
public void onNext(Reading reading) {
if (reading.meaning.equals("temperature"))
mTemperatureValueTextView.setText(reading.value + "˚C");
}
});
}
}
ThermometerDemoApplication.java:
package com.vasansdomain.pavan.thermometer;
import android.app.Application;
import io.relayr.demo.thermometer.RelayrSdkInitializer;
public class ThermometerDemoApplication extends Application
{
#Override
public void onCreate()
{
super.onCreate();
RelayrSdkInitializer.initSdk(this);
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="#drawable/thermometer"
android:label="#string/app_name"
android:theme="#style/AppTheme"
android:name=".ThermometerDemoApplication" >
<activity
android:name=".ThermometerDemoActivity"
android:label="#string/app_name"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
activity_demo_thermometer.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context=".ThermometerDemoActivity"
android:background="#FFFFFF"
android:gravity="center">
<TextView
android:id="#+id/txt_welcome"
android:text="#string/hello_relayr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:textSize="20dp" />
<TextView
android:id="#+id/txt_temperature_value"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="60sp"
android:paddingTop="25dp"
android:paddingBottom="25dp"/>
<TextView
android:id="#+id/txt_temperature_name"
android:text="#string/title_temperature"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="30sp"
android:layout_gravity="center"
android:paddingBottom="25dp"/>
</LinearLayout>
strings.xml
<resources>
<string name="app_name">Thermometer</string>
<string name="action_settings">Settings</string>
<string name="hello_relayr">Hello Relayr!!!</string>
<string name="hello">Hello %s!</string>
<string name="action_log_in">Log in</string>
<string name="action_log_out">Log out</string>
<string name="successfully_logged_in">You were successfully logged in!</string>
<string name="successfully_logged_out">You were successfully logged out!</string>
<string name="unsuccessfully_logged_in">There was a problem in the log in.</string>
<string name="something_went_wrong">Oops! Something went wrong</string>
<string name="title_temperature">Temperature</string>
</resources>
This is the code for the mock mode of the app:debug->java->io->relayr->demo->thermometer
package io.relayr.demo.thermometer;
import android.content.Context;
import io.relayr.RelayrSdk;
public abstract class RelayrSdkInitializer {
public static void initSdk(Context context) {
new RelayrSdk.Builder(context).inMockMode(true).build();
}
}
This is the code for the release mode of the app:release->java->io->relayr->demo->thermometer
package io.relayr.demo.thermometer;
import android.content.Context;
import io.relayr.RelayrSdk;
public class RelayrSdkInitializer {
public static void initSdk(Context context) {
new RelayrSdk.Builder(context).inMockMode(false).build(); }
}
Is the answer possibly related to tweaking the RelayrSdkInitializer class in the debug file of the app

Build a release version of the app and try again. The debug version only provides mock data.
Because if you see another name (Hugo Domenech) than you are building the app in debug mode and that's why you see mocked data.

changing activity on android

I've difficult with changing activity on android.
I started my app(display main.xml) and clicked Start button(display listening.xml).
When I had pressed back button, background disappeared on my app.
[display main.xml]
[display listening.xml]
detecting display.. (A image not attached because I have less reputation :( )
[display main.xml (Problem)]
Following is my source code.
(Some code are omitted.)
package com.musicg.demo.android;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.AudioManager.OnAudioFocusChangeListener;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.os.Vibrator;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity implements OnSignalsDetectedListener {
static MainActivity mainApp;
public static final int DETECT_NONE = 0;
public static final int DETECT_WHISTLE = 1;
public static int selectedDetection = DETECT_NONE;
// detection parameters
private DetectorThread detectorThread;
private RecorderThread recorderThread;
private int numWhistleDetected = 0;
// views
private View mainView, listeningView, helpView ;
private Button whistleButton , whistleButton02;
// alarmVoice()에서 사용하는 변수들 - am, mp, LOG
private AudioManager am;
private MediaPlayer mp;
private String LOG = "My_Tag";
ImageView imageView01;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mainApp = this;
// set views
LayoutInflater inflater = LayoutInflater.from(this);
mainView = inflater.inflate(R.layout.main, null);
listeningView = inflater.inflate(R.layout.listening, null);
setContentView(mainView);
whistleButton = (Button) this.findViewById(R.id.whistleButton); // Start Button
whistleButton.setOnClickListener(new ClickEvent());
whistleButton02 = (Button) this.findViewById(R.id.whistleButton02); // ReadMe Button
whistleButton02.setOnClickListener(new ClickEvent());
}
private void goHomeView() {
setContentView(mainView);
if (recorderThread != null) {
recorderThread.stopRecording();
recorderThread = null;
}
if (detectorThread != null) {
detectorThread.stopDetection();
detectorThread = null;
}
selectedDetection = DETECT_NONE;
}
private void goListeningView() {
setContentView(listeningView);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0, 0, 0, "종료");
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
goHomeView();
return true;
}
return super.onKeyDown(keyCode, event);
}
class ClickEvent implements OnClickListener {
public void onClick(View view) {
if (view == whistleButton) { // Start Button
selectedDetection = DETECT_WHISTLE;
recorderThread = new RecorderThread();
recorderThread.start();
detectorThread = new DetectorThread(recorderThread);
detectorThread.setOnSignalsDetectedListener(MainActivity.mainApp);
detectorThread.start();
goListeningView();
}
if(view == whistleButton02) // ReadMe Button
{
Intent intent = new Intent(MainActivity.this, help.class );
startActivity(intent);
}
}
}
// omitted..
}
Please give me some advice.
Sorry for my bad english.
Thanks in advance.
Following are added context.
I tried to change inflater to setContentView().
But, It's not worked.
I clicked start button and touched back key on my phone.
My phone said "Unfortunately, (MY_APP_NAME) has stopped."
I reupload my source code.
[MainActivity.java]
package com.musicg.demo.android;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.AudioManager.OnAudioFocusChangeListener;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.os.Vibrator;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity implements OnSignalsDetectedListener {
static MainActivity mainApp;
public static final int DETECT_NONE = 0;
public static final int DETECT_WHISTLE = 1;
public static int selectedDetection = DETECT_NONE;
// detection parameters
private DetectorThread detectorThread;
private RecorderThread recorderThread;
private int numWhistleDetected = 0;
// views
private View mainView, listeningView, helpView ;
private Button whistleButton , whistleButton02;
// alarmVoice()에서 사용하는 변수들 - am, mp, LOG
private AudioManager am;
private MediaPlayer mp;
private String LOG = "My_Tag";
ImageView imageView01;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mainApp = this;
// set views
// LayoutInflater inflater = LayoutInflater.from(this); // disable inflater
setContentView(R.layout.main);
// mainView = inflater.inflate(R.layout.main, null); // disable inflater
// listeningView = inflater.inflate(R.layout.listening, null); // disable inflater
// setContentView(mainView); // disable inflater
whistleButton = (Button) this.findViewById(R.id.whistleButton); // Start button
whistleButton.setOnClickListener(new ClickEvent());
whistleButton02 = (Button) this.findViewById(R.id.whistleButton02); // ReadMe button
whistleButton02.setOnClickListener(new ClickEvent());
}
private void goHomeView() {
setContentView(mainView);
if (recorderThread != null) {
recorderThread.stopRecording();
recorderThread = null;
}
if (detectorThread != null) {
detectorThread.stopDetection();
detectorThread = null;
}
selectedDetection = DETECT_NONE;
}
private void goListeningView() {
//setContentView(listeningView);
setContentView(R.layout.listening);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0, 0, 0, "Exit");
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case 0:
NotificationManager notiMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notiMgr.cancel(999); // Notification의 고유 id가 999인 것을 찾아서 notification을 종료한다.
finish();
break;
default:
}
return super.onOptionsItemSelected(item);
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
goHomeView();
return true;
}
return super.onKeyDown(keyCode, event);
}
class ClickEvent implements OnClickListener {
public void onClick(View view) {
if (view == whistleButton) {
selectedDetection = DETECT_WHISTLE;
recorderThread = new RecorderThread();
recorderThread.start();
detectorThread = new DetectorThread(recorderThread);
detectorThread.setOnSignalsDetectedListener(MainActivity.mainApp);
detectorThread.start();
goListeningView();
}
if(view == whistleButton02)
{
Intent intent = new Intent(MainActivity.this, help.class );
startActivity(intent);
}
}
}
private void Threadsleep(DetectorThread detectorThread){
try
{
detectorThread.sleep(1000);
}
catch(InterruptedException e)
{
e.printStackTrace();
}
}
protected void onDestroy() {
super.onDestroy();
}
#Override
public void onWhistleDetected() {
runOnUiThread(new Runnable() {
public void run() {
TextView textView = (TextView)
MainActivity.mainApp.findViewById(R.id.detectedNumberText);
textView.setText(String.valueOf(numWhistleDetected++));
if (numWhistleDetected > 1) {
setEvent();
}
}
});
Threadsleep(detectorThread);
}
}
[main.xml]
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#drawable/car">
<Button
android:id="#+id/whistleButton"
android:layout_width="150dp"
android:layout_height="40dp"
android:gravity="center"
android:text="Start"
android:textSize="20dp"
android:background="#FFFFFFFF"
android:textColor="#FF000000"
android:padding="5dp"
android:layout_centerInParent = "true"
/>
<Button
android:id="#+id/whistleButton02"
android:layout_width="150dp"
android:layout_height="40dp"
android:layout_below="#id/whistleButton"
android:gravity="center"
android:text="ReadMe"
android:background="#FFFFFFFF"
android:textColor="#FF000000"
android:textSize="20dp"
android:layout_marginTop="15dp"
android:padding="5dp"
android:layout_centerInParent = "true"
/>
</RelativeLayout>
[listening.xml]
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background ="#drawable/worker"
>
<TextView
android:id="#+id/listening"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_centerVertical="true"
android:layout_centerInParent="true"
android:textSize="30dp"
android:text="Detecting.." />
<TextView
android:id="#+id/detectedText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/listening"
android:layout_centerInParent="true"
android:textSize="20dp" />
<TextView
android:id="#+id/detectedNumberText"
android:textStyle="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/listening"
android:textSize="5dp"
android:layout_toRightOf="#+id/detectedText"
/>
</RelativeLayout>
[help.xml]
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="112dp"
android:layout_marginTop="20dp"
android:text="Read Me...." />
</RelativeLayout>
[AndroidManifest.xml]
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.musicg.demo.android"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<application
android:icon="#drawable/ear"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".listening"></activity>
<activity android:name="help"></activity>
</application>
</manifest>

First of all Use setContentView(R.layout.main) in onCreate() in your oncreate as Akhil mentioned instead of inflating.
Also to set background image to your activity use android:background="#drawable/image_name" to your root container in main.xml.
If you are trying to dynamically switch the image in your lisenter.
Try and let us know if it worked.
Also to get more understanding can to show contents of your main.xml ?

Android Handler Message and ListView

Here's my error:
*** Uncaught remote exception! (Exceptions are not yet supported across processes.)
android.util.AndroidRuntimeException: { what=1008 when=368280372 } This message is already in use.
at android.os.MessageQueue.enqueueMessage(MessageQueue.java:171)
at android.os.Handler.sendMessageAtTime(Handler.java:457)
at android.os.Handler.sendMessageDelayed(Handler.java:430)
at android.os.Handler.sendMessage(Handler.java:367)
at android.view.ViewRoot.dispatchAppVisibility(ViewRoot.java:2748)
What I'm attempting is to have a listview, that is populated by custom list items, each list item has multiple views and each view has an onclick listener attached. When this onClickListener is pressed it sends a Message to a Handler with a what and arg1 arguments.
Clicking one of my elements fires an intent to start a new activity.
Clicking the other shows a toast.
When these are pressed in a combination I get the error above. Namely clicking the text to fire the intent, (then press back) then clicking the image to show the toast, then when you click the text to fire the intent again I get the FC.
And here is the code below, I tried to remove as much cruft as I could to get to the bones of the error:
If you want to skip to whats important look at the onClickListener's in ConversationAdapter.class and how they interact with StartPage.class
Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.handler.test"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".StartPage"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".DetailsPage"
android:label="DetailsPage"
>
</activity>
</application>
<uses-sdk android:minSdkVersion="3" />
</manifest>
StartPage.class:
package com.handler.test;
import java.util.ArrayList;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.widget.Toast;
public class StartPage extends ListActivity {
private ArrayList<Conversation> mConversations = null;
private ConversationAdapter mAdapter;
private Context mContext;
private ProgressDialog mProgressDialog;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mContext = this;
mConversations = new ArrayList<Conversation>();
this.mAdapter = new ConversationAdapter(mContext, R.layout.inbox_row, mConversations, mHandler);
setListAdapter(this.mAdapter);
new Thread(new Runnable() {
#Override
public void run() {
getConversations();
}
}).start();
mProgressDialog = ProgressDialog.show(StartPage.this, "Please wait...", "Retrieving data ...", true);
}
private void getConversations() {
try {
mConversations = new ArrayList<Conversation>();
Conversation o1 = new Conversation();
o1.setStatus("SF services");
o1.setMessage("Pending");
mConversations.add(o1);
} catch (Exception e) {
Log.e("BACKGROUND_PROC", e.getMessage());
}
runOnUiThread(returnRes);
}
private Runnable returnRes = new Runnable() {
#Override
public void run() {
if(mConversations != null && mConversations.size() > 0){
mAdapter.notifyDataSetChanged();
for(int i=0;i<mConversations.size();i++)
mAdapter.add(mConversations.get(i));
}
mProgressDialog.dismiss();
mAdapter.notifyDataSetChanged();
}
};
private Handler mHandler = new Handler(){
#Override
public void handleMessage(Message msg) {
int convIndex = msg.arg1;
int viewTouched = msg.what;
switch(viewTouched){
case ConversationAdapter.PROF_ICON:
showNumber(convIndex);
break;
case ConversationAdapter.MESSAGE:
showMessageDetails(convIndex);
break;
}
super.handleMessage(msg);
}
};
private void showNumber(int convIndex) {
Toast.makeText(mContext, "Pressed: "+convIndex, Toast.LENGTH_LONG).show();
}
private void showMessageDetails(int convIndex) {
final Conversation conv = mConversations.get(convIndex);
Intent i = new Intent(mContext, DetailsPage.class);
i.putExtra("someExtra", conv);
startActivity(i);
}
}
DetailsPage.class
package com.handler.test;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
public class DetailsPage extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i("Test", "Details Page");
}
}
Conversation.class:
package com.handler.test;
import java.io.Serializable;
public class Conversation implements Serializable {
private static final long serialVersionUID = -437261671361122258L;
private String status;
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
}
ConversationAdapter.class:
package com.handler.test;
import java.util.ArrayList;
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
public class ConversationAdapter extends ArrayAdapter<Conversation> {
public static final int PROF_ICON = 0;
public static final int MESSAGE = 1;
private Context mContext;
private Handler mHandler;
private ArrayList<Conversation> mItems;
private int mXmlId;
private LinearLayout detailsOfConv;
private ImageView iconImage;
public ConversationAdapter(Context context, int textViewResourceId, ArrayList<Conversation> items, Handler handler) {
super(context, textViewResourceId, items);
this.mContext = context;
this.mItems = items;
this.mXmlId = textViewResourceId;
this.mHandler = handler;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(mXmlId, null);
}
final Message m = new Message();
m.arg1 = position;
Conversation c = mItems.get(position);
if (c != null) {
iconImage = (ImageView) v.findViewById(R.id.icon);
if (iconImage != null) {
iconImage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
m.what = PROF_ICON;
mHandler.sendMessage(m);
}
});
}
detailsOfConv = (LinearLayout) v.findViewById(R.id.details);
if(detailsOfConv != null){
detailsOfConv.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
m.what = MESSAGE;
mHandler.sendMessage(m);
}
});
}
}
return v;
}
}
main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dip"
>
<ListView
android:id="#+id/android:list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:cacheColorHint="#00000000"
/>
</LinearLayout>
inbox_row.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip">
<ImageView
android:id="#+id/icon"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_marginRight="6dip"
android:src="#drawable/icon" />
<LinearLayout
android:id="#+id/details"
android:orientation="vertical"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="fill_parent">
<TextView
android:id="#+id/toptext"
android:textColor="#99FF66"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:singleLine="true"
android:text="123456789"
/>
</LinearLayout>
</LinearLayout>

My guess would be that you are sending twice the same message. Indeed in the code there is one new Message() and two mHandler.sendMessage(m) which are possibly both executed.
Try making a new message for every time you send a message.
Edited:
Message.obtain() is preferable to Message m = new Message() (because it recycles used messages under the hood)
In your case you could use new.copyFrom(old) if you need a copy of existing message.

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Android SharedPreferences not removed until app is restarted - android

Just call editor.clear(); and editor.commit(); is enough to delete all data from shared preference.

Because onResume, you keep on instantiating a new SharedPrefManager sharedPrefManager = new SharedPrefManager(this); Modify your SharedPrefManager so that it only gives one instance at all times OR make sure that you are referring to the same object when you return to LoginActivity.

SharedPreferences is permanent storage, you can clear SharedPreferences.Editor.clear().commit(); alternate solution you want once app close clear entire values,try Application singleton class

#Ciammarica you can call this code on click of Logout button, hope this can help you..you can set in logout button boolean value false.. SessionManager.setUserLoggedIn(YourActivity.this, false); SessionManager.clearAppCredential(YourActivity.this);

I found the problem myself... It didn't like the sharedPrefManager.removeDataFromSharedPreference(); method to be called from inside new DialogInterface.OnClickListener() I took it in another part of the code and it worked.

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