Develop Reference

"Error: cannot find symbol class app"

I have external package class (my custom library), which I want to include in the project. It uses Activity, but shows error as you see.
If I place this command in main project class, it works well... What to do?
Here is the code:
package com.__MyDefaultLibrary;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.ScaleAnimation;
import android.widget.*;
import java.io.File;
import java.util.Calendar;
//
import android.app.Activity;
import com.oceanesa.samplevideorecorder.R;
public class __MyDefaultFunctions{
public android.app.Activity actv1 = android.app.Activity;
public void Initt(){
PreferenceManager.setDefaultValues(actv1.getBaseContext(), R.xml.mypreferences, false);
}
// ========== MY CUSTOM LIBRARY =============//
//button find
public Button fvb(int id) {
return (Button) actv1.findViewById(id);
}
//message show
public void msg(String text) {
Toast.makeText(actv1.getApplicationContext(), text, Toast.LENGTH_LONG).show();
}
public View.OnClickListener optionsListener2 = new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(actv1.getBaseContext(), com.__MyDefaultLibrary.__MyDefaultPreferencesInit1.class);
actv1.startActivity(i);
}
};
}
And AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.oceanesa.samplevideorecorder"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-feature
android:name="android.hardware.camera.front"
android:required="false" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:screenOrientation="landscape"
android:theme="#style/AppTheme"
>
<activity
android:name="com.oceanesa.samplevideorecorder.VideoCaptureExample"
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="com.__MyDefaultLibrary.__MyDefaultPreferencesInit1"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN_ACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>

Update Answer just passing context to class
public class MyClass {
private static Context mContext;
private static Activity mActivity;
public MyClass(Context c) {
mContext= c;
}
public MyClass(Activity act) {
mActivity= act;
}
public static void showToastMethod() {
// then passing context or activity to
Toast.makeText(mContext, "mymessage ", Toast.LENGTH_SHORT).show();
// or Toast.makeText(mActivity, "mymessage ", Toast.LENGTH_SHORT).show();
}
}

Finally I got it working with the help of topic: How to display a Toast message in from a class that doesn't extend Activity
Problem was in my code. There was no need to call andorid.app at all. I didnt pass Activity to my external file, from where I couldnt call anything..
I had to pass activity like this (from main project file):
public MyExternalClass myEx = new MyExternalClass(Activity);
and needed some modifications...

Android. Intent.ACTION CAMERA BUTTON is not working

Learning broadcast messages. The book DN Kolisnichenko - "Programming for Android" is an example of where the camera at the touch of a button starts the service. But I have it che does not work. What is the problem? Or I do not know what is the camera button (physical or on the display), or do not understand what is wrong. Here is the code of the example:
MainActivity.java
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Intent;
import android.content.IntentFilter;
public class MainActivity extends AppCompatActivity {
MyReceiver iReceiver = new MyReceiver();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
IntentFilter iFilter = new IntentFilter(Intent.ACTION_CAMERA_BUTTON);
iFilter.addAction(Intent.ACTION_CAMERA_BUTTON);
registerReceiver(iReceiver, iFilter);
}
#Override
protected void onDestroy() {
unregisterReceiver(iReceiver);
super.onDestroy();
}
}
MyReceiver.java
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class MyReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context rcvContext, Intent rcvIntent) {
String action = rcvIntent.getAction();
if (action.equals(Intent.ACTION_CAMERA_BUTTON)) {
rcvContext.startService(new Intent(rcvContext,
MyService.class));
}
}
}
MyService.java
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;
public class MyService extends Service {
#Override
public IBinder onBind(Intent arg0) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
Toast.makeText(this,"Service started...",
Toast.LENGTH_LONG).show();
}
#Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(this, "Service destroyed...",
Toast.LENGTH_LONG).show();
}
}
And manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ivarious.myapplication">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
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" />
<action android:name="android.intent.action.CAMERA_BUTTON" />
</intent-filter>
</activity>
<receiver android:name=".MyReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.CAMERA_BUTTON" />
</intent-filter>
<service android:name=".MyService"></service>
<action android:name="android.intent.action.CAMERA_BUTTON" />
<action android:name="android.intent.extra.KEY_EVENT" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
</receiver>
</application>
</manifest>

Make Sure You Added The Camera Permission to your Manifest
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />

Device stops receiving notifications after 24 hours

I have an application in android and phonegap and I'm using Parse to send pushs.
Everything works fine when I install it: I can send and receive notifications.
After 5 hours, it starts to delay the pushs and after one day, it stops and I cant receive it anymore.
I see the notifications in dashboard but not in device.
Can someone give me a sugestion ?
Manifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.meeto1"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<supports-screens
android:largeScreens="true"
android:normalScreens="true"
android:smallScreens="true"
android:resizeable="true"
android:anyDensity="true" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<application
android:name="com.example.meeto1.ParseApplication"
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.meeto1.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name="com.parse.PushService" />
<receiver android:name="com.example.meeto1.PushReceiver"
android:exported="false">
<intent-filter>
<action android:name="com.parse.push.intent.RECEIVE" />
<action android:name="com.parse.push.intent.DELETE" />
<action android:name="com.parse.push.intent.OPEN" />
</intent-filter>
</receiver>
<receiver android:name="com.parse.ParseBroadcastReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.USER_PRESENT" />
</intent-filter>
</receiver>
<meta-data android:name="com.parse.push.notification_icon"
android:resource="#drawable/ic_launcher"/>
</application>
</manifest>
PushReceiver.java:
package com.example.meeto1;
import org.json.JSONException;
import org.json.JSONObject;
import com.parse.ParsePushBroadcastReceiver;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
public class PushReceiver extends ParsePushBroadcastReceiver {
#Override
public void onPushOpen(Context context, Intent intent) {
Log.e("Push", "Clicked2");
Bundle extras = intent.getExtras();
String message = extras != null ? extras.getString("com.parse.Data") : "";
JSONObject jObject;
try {
jObject = new JSONObject(message);
for (int i=0; i < 10; i++)
{
Toast toast = Toast.makeText(context, jObject.getString("alert"), Toast.LENGTH_LONG);
toast.show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
protected Class<? extends Activity> getActivity(Context context, Intent intent) {
Log.v("Parse", "getActivity called");
return super.getActivity(context, intent);
}
#Override
protected void onPushReceive(Context context, Intent intent) {
Log.v("Parse", "onPushReceive called");
super.onPushReceive(context, intent);
}
#Override
public void onReceive(Context context, Intent intent) {
Log.v("Parse", "onReceive Called");
super.onReceive(context, intent);
}
}
MainActivity.java:
package com.example.meeto1;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import org.apache.cordova.DroidGap;
import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
import com.parse.Parse;
import com.parse.ParseAnalytics;
import com.parse.ParseInstallation;
import com.parse.ParsePush;
public class MainActivity extends DroidGap {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.loadUrl("file:///android_asset/www/index.html");
this.appView.addJavascriptInterface(new MainActivity(), "Android");
this.appView.addJavascriptInterface(new MeusMetodos(), "MeusMetodos");
this.appView.getSettings().setJavaScriptEnabled(true);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onStop() {
Log.w(TAG, "App stopped");
super.onStop();
}
#Override
public void onDestroy() {
Log.w(TAG, "App destoryed");
super.onDestroy();
}
}
ParseApplication.java
package com.example.meeto1;
import com.parse.Parse;
import com.parse.ParseInstallation;
import com.parse.ParsePush;
import com.parse.PushService;
import android.app.Application;
public class ParseApplication extends Application {
#Override
public void onCreate() {
super.onCreate();
Parse.initialize(this, "xxx", "xxx");
ParsePush.subscribeInBackground("todosUsuarios");
ParseInstallation.getCurrentInstallation().saveInBackground();
}
}

Just to let you know I solved it.
In my Manifest,inside <application>, I'm using the GCM Parse support and my notifications are working now:
<receiver android:name="com.parse.GcmBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND">
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.example.meeto1" />
</intent-filter>

start my service on phone restart in android

I am making app which tracks user location continuously, so far i have been able to make a successful receiving of its ordinate on location change, but if he is restarting the phone than i am not able to start my service without user again opening the app.
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.aa.gpsdemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"/>
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.aa.gpsdemo.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MyService" android:label="My Service">
<intent-filter>
<action android:name="com.aa.gpsdemo.StartMyServiceAtBootReciever" />
</intent-filter>
</service>
<receiver
android:name=".receiver.StartMyServiceAtBootReceiver"
android:enabled="true"
android:exported="true"
android:label="StartMyServiceAtBootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
</application>
</manifest>
StartMyServiceAtBootReciever.java
package com.aa.gpsdemo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class StartMyServiceAtBootReciever extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) {
Intent serviceIntent = new Intent("com.aa.gpsdemo.BackgroundService");
context.startService(serviceIntent);
}
}
}
BackgroundService.java
package com.aa.gpsdemo;
import android.app.Service;
import android.content.Intent;
import android.content.Context;
import android.os.IBinder;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.widget.Toast;
import android.location.Criteria;
public class BackgroundService extends Service {
private static NewLocationListener mylistner=null;
private final static String TAG = "MainActivity";
private Context context = null;
#Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
mylistner = new NewLocationListener(context);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setPowerRequirement(Criteria.POWER_MEDIUM);
criteria.setCostAllowed(true);
LocationManager locManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
String bestProvider=locManager.getBestProvider(criteria, true);
locManager.requestLocationUpdates(bestProvider,1000, 5, mylistner);
}
}
where i am going wrong any help would be highly appreciated on restart of a phone i get demoapp has stopped i tried putting toast on reciever but that toast also are not coming at present

Make Sure u have the permission in AndroidManifest File :
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
Change this to :
#Override
public void onReceive(Context context, Intent intent) {
Intent serviceIntent = new Intent(context,BackgroundService.class);
startService(serviceIntent);
}

RECEIVE_BOOT_COMPLETED: Broadcast Action: This is broadcast once, after the system has finished booting. It can be used to perform application-specific initialization, such as installing alarms. You must hold the RECEIVE_BOOT_COMPLETED permission in order to receive this broadcast.
Refrence
Stackoverflow Question

Broadcast receiver not working

I am trying to test Broadcast receiver for outgoing calls. Please help.
Here is my CallCounter class:
package com.callout;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
public class CallCounter extends PhoneStateListener {
public void onCallStateChanged(int state, String incomingNumber) {
switch(state) {
case TelephonyManager.CALL_STATE_IDLE:
Log.d("Tony+++++++++++","Outgoing Call finished");
// Call Finished -> stop counter and store it.
// callStop=new Date().getTime();
Context c = getApplicationContext();
c.stopService(new Intent(c,ListenerContainer.class));
break;
case TelephonyManager.CALL_STATE_OFFHOOK:
Log.d("++++++++++++++++Tony","Outgoing Call Starting");
// Call Started -> start counter.
// This is not precise, because it starts when calling,
// we can correct it later reading from call log
// callStart=new Date().getTime();
break;
}
}
private Context getApplicationContext() {
// TODO Auto-generated method stub
return this.getApplicationContext();
}
}
Here is myReceiver
package com.callout;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class myReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL)) {
Log.d("T+++++++++++++++++ony","In mYRecieverrr");
context.startService(new Intent(context,ListenerContainer.class));
}
}
}
Here is myService:
package com.callout;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
public class ListenerContainer extends Service {
public class LocalBinder extends Binder {
ListenerContainer getService() {
Log.d("Tony","OKKK HEREEEEEEEEEEEEEeEEEEE");
return ListenerContainer.this;
}
}
#Override
public void onStart(Intent intent, int startId) {
TelephonyManager tManager =(TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
CallCounter callCounter=new CallCounter();
tManager.listen(callCounter,PhoneStateListener.LISTEN_CALL_STATE);
Log.d("To++++++++++++++ny","Call COUNTER Registered");
}
#Override
public IBinder onBind(Intent intent) {
return mBinder;
}
private final IBinder mBinder = new LocalBinder();
}
And this is the manifest file if i m missing some permission:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.callout"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.CALL_PHONE"/>
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".CallCounter"
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=".myReceiver"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:enabled="true" android:name=".ListenerContainer" />
<receiver android:name=".myReceiver">
<intent-filter>
<action android:name="android.intent.action.NEW_OUTGOING_CALL" />
</intent-filter>
</receiver>
</application>
</manifest>
Please point out my mistake.

You must add the following permission to your manifest since your are registering a phonestatelistener.
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

It looks like your receiver is missing an attribute in the manifest file :
http://developer.android.com/guide/topics/manifest/receiver-element.html
Look at the exported attribute, it should be set tot true to receive broadcast from other apps.
Regards,
Stéphane

There's a working solution with full source here that meets your requirements
https://www.codeproject.com/articles/548416/detecting-incoming-and-outgoing-phone-calls-on-and