Develop Reference

In Android manifest android:name shows me error -- parse sdk android

Below is the code code of Android manifest
<application
android:name="com.example.m1.parsedemo.MainActivity" // this line show error
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>
</application>
and the main activity java file is
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Parse.enableLocalDatastore(this);
Parse.initialize(new Parse.Configuration.Builder(this)
.applicationId("31e1ed2c6158fa0d01c3a5201a15e4af3f228a5b")
// if define
.clientKey("7d930e5059ba7ca44ce7083a6708b99eb70d9b4b")
.server("http://35.154.249.137:80/parse/")
.build()
);
ParseUser.enableRevocableSessionInBackground();
ParseObject gameScore = new ParseObject("Manish");
gameScore.put("score", 1337);
gameScore.put("playerName", "Manish");
gameScore.put("cheatMode", false);
gameScore.saveInBackground(new SaveCallback() {
#Override
public void done(ParseException e) {
if(e == null) {
Log.i("sucess","sucess");
} else {
Log.i("error",e.toString());
}
}
});
}
I am following this guideline -> parse
Removing
android:name=""
shows no error, but cant connect to the server and adding it, show error. I am stuck here cant connect to parse server.
And also please tell me is there any wrong code in main activity java file.
Thanx

You won't need this or you're referencing the wrong file in here:
android:name="com.example.m1.parsedemo.MainActivity" // this line show error
Which you already have:
<activity android:name=".MainActivity"
If you're trying to reference the Application class of your project, use a different name and create another class like calling it App, then:
android:name=".App"
In your AndroidManifest.xml application tag and these codes inside the onCreate() of the App class:
import com.parse.Parse;
import android.app.Application;
public class App extends Application {
#Override
public void onCreate() {
super.onCreate();
Parse.initialize(new Parse.Configuration.Builder(this)
.applicationId("31e1ed2c6158fa0d01c3a5201a15e4af3f228a5b")
// if define
.clientKey("7d930e5059ba7ca44ce7083a6708b99eb70d9b4b")
.server("http://35.154.249.137:80/parse/")
.build()
);
}
}
Just like the documentation.

This should be name of your application class, not the activity class
<application
android:name="com.example.m1.parsedemo.MainActivity" // this line show error
</application
correct it with the application class which looks like this
public class App extends Application {
#Override
public void onCreate() {
super.onCreate();
Parse.initialize(new Parse.Configuration.Builder(this)
.applicationId("YOUR_APP_ID")
// if defined
.clientKey("YOUR_CLIENT_KEY")
.server("http://localhost:1337/parse/")
.build()
);
}
}

BackUpAgentHelperClass is not getting called

I want to backup data in Android using MyBackUpAgent class which extends BackupAgentHelper. I am using SharedPreferences in order to store data.
My mainactivity code is:
public class MainActivity extends Activity {
EditText inputtext;
TextView outputtext;
Button submit;
public static SharedPreferences sharedprefs;
static final String File_Name_Of_Prefrences ="godplay_preferences";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
init();
sharedprefs=getSharedPreferences(File_Name_Of_Prefrences,MODE_PRIVATE);
System.out.println("value="+sharedprefs.getString("Input",""));
outputtext.setText(sharedprefs.getString("Input",""));
submit.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
populateUI();
}
});
}
public void populateUI()
{
String savedinput=inputtext.getText().toString();
System.out.println("savedinput="+savedinput);
outputtext.setText(savedinput);
sharedprefs=getSharedPreferences(File_Name_Of_Prefrences,MODE_PRIVATE);
Editor editor=sharedprefs.edit();
editor.putString("Input",inputtext.getText().toString());
editor.commit();
requestBackup();
}
private void init() throws ClassCastException
{
inputtext=(EditText) findViewById(R.id.edtInputText);
outputtext=(TextView) findViewById(R.id.txtOutputText);
submit=(Button) findViewById(R.id.btnSubmit);
}
public void requestBackup() {
BackupManager bm = new BackupManager(getApplicationContext());
bm.dataChanged();
}
}
My MyBackUpAgent class:
public class MyBackUpAgent extends BackupAgentHelper{
static final String PREFS_BACKUP_KEY = "backup";
String key_string="Hello World";
#Override
public void onCreate() {
System.out.println("********************");
SharedPreferencesBackupHelper helper = new SharedPreferencesBackupHelper(this,MainActivity.File_Name_Of_Prefrences);
addHelper(PREFS_BACKUP_KEY, helper);
}
}
My mainfest.xml file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.godplay"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:restoreAnyVersion="false"
android:backupAgent=".MyBackUpAgent"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.godplay.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>
<meta-data android:name="com.google.android.backup.api_key" android:value="AEdPqrEAAAAIhjloadYCTPUNo3yPsSX6LKmziiumZiQVlEEdBA" />
</application>
</manifest>
So far I have tried with bmgr tool to test, it is executing successfully with bmgr tool. However, on testing on Android device and emulator, back up is not happening, nor restoring.
Also, I have tested this on Android 5.1, Android 4.2, and Android 4.0 but still no luck.
It seems to me that my MyBackUpAgent class is never getting called, and I have tried breakpoints in MyBackUpAgent Class and validated it. Its never get hit.
What am I doing wrong?

Docs mention Conditions For Backup Schedule:
The user has enabled backup on the device in Settings > Backup & Reset.
At least 24 hours have elapsed since the last backup.
The device is idle and charging.
The device is connected to a Wi-Fi network. If the device is never connected to a wifi network, then Auto Backup never occurs.
If backup is working for you with bmgr tool but not on a real device / emulator, it's possible you are not meeting all those conditions, therefore backup never occur.

In your AndroidManifest.xml file, try changing
android:backupAgent=".MyBackUpAgent"
with the fully qualified class name, i.e.
android:backupAgent="com.abh.utils.MyBackUpAgent"
but of course changing "com.abh.utils" with the name of the package MyBackUpAgent.java is in.

I had a similar problem and have searched everywhere with no luck. Finally found the solution.
It seems that the BackupAgent needs to be in the top package with no preceding dot. So try changing:
android:backupAgent=".MyBackUpAgent"
to
android:backupAgent="MyBackUpAgent"

You can refer to developer document,
https://developer.android.com/guide/topics/data/backup.html#PerformingBackup
A backup request does not result in an immediate call to your onBackup() method. Instead, the Backup Manager waits for an appropriate time
you can use "bmgr tool" to initiate immediate backup whiling developing your app.

Make sure you call
adb shell bmgr run
to simulate the backup.
Also try using local transport to backup at any time:
adb shell bmgr transport android/com.android.internal.backup.LocalTransport

Nothing happens when I configure RoboGuice

I am new to RoboGuice and I am trying to set up my activity to use DI. However, nothing happens when I attempt to use it. I only get a blank black window with no content and no logging in my Activity.onCreate() method after I call "super.onCreate(savedInstanceState);"
See these 2 snippets of code:
public class ClikClokActivity extends RoboActivity{
#Inject
private TileAdapter tileAdapter;
#Inject
private GameLogicService gameLogicService;
#Inject
private GridOperationQueue gridOperationQueue;
private GridView gridView;
#Inject
private Handler handler;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
Log.v(this.getClass().toString(), "Entering onCreate");
super.onCreate(savedInstanceState);
Log.v(this.getClass().toString(), "Never logs this with RoboGuice");
setContentView(R.layout.main);
gridView = (GridView) findViewById(R.id.gridview);
gridView.setNumColumns(Constants.GRID_WIDTH);
gridView.setAdapter(tileAdapter);
Log.v(this.getClass().toString(), "GridView initialized");
gridOperationQueue.start();
Log.v(this.getClass().toString(), "Completed onCreate");
}
and
public class ClikClokApplication extends RoboApplication{
#Override
protected void addApplicationModules(List<Module> modules) {
modules.add(new ClikClokModule());
}
}
and
public class ClikClokModule extends AbstractAndroidModule {
#Override
protected void configure() {
}
}
and
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.clikclok"
android:versionCode="1"
android:versionName="1.0">
<application android:name="com.clikclok.ClikClokApplication" android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".ClikClokActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
If you look at the above code, I never get the second logging. However, if I was to extend from Activity instead and remove the android:name="com.clikclok.ClikClokApplication" attribute from my manifest then I do get the second logging (albeit fails with NullPointers as there is no initialization performed).
So what may be happening in super.onCreate(savedInstanceState); that is causing my application not to work?
Thanks
Update from the above:
I've spent quite a bit of time investigating this and using Eclipse's debugger can now see where my code seems to hang within RoboGuice.
The following code is from the InjectorImpl class:
public void injectMembers(Object instance) {
// Reaches here but...
MembersInjector membersInjector = getMembersInjector(instance.getClass());
// ....this comment is never reached
membersInjector.injectMembers(instance);
}
So I dug into the Guice 3.0 code using my debugger and into the FailableCache class:
public V get(K key, Errors errors) throws ErrorsException {
// Reaches here....
Object resultOrError = delegate.get(key);
// ...but not here
if (resultOrError instanceof Errors) {
errors.merge((Errors) resultOrError);
throw errors.toException();
} else {
#SuppressWarnings("unchecked") // create returned a non-error result, so this is safe
V result = (V) resultOrError;
return result;
}
}
How could this be that it just hangs while retrieving a key from a map? I'm not familiar enough with the code and it is quite confusing to troubleshoot.
Any advice is appreciated.

Try to add some bindings in your configure method.
You can also try to inject your grid view like this
#InjectView(R.id.gridview)
GridView gridView;
I hope this will help you.
Regards.

This was caused by me attempting to inject my Activity class into a service class.
So I was attempting to #Inject an instance of "ClikClokActivity" instead of "Activity".
Once I removed this injection attempt, everything worked fine. Not sure if this exposes some other issue with RoboGuice or Guice itself.

Data Backup into Google Servers using Android Backup Service in Android

Im trying to do the backing up of my application's data into the Google Servers..
For doing this I've implemented a BackupAgent in my code and I included this in the Android Manifest file and "Meta-data" ( Got after registered my Application's package with the Android Backup Service)
When I run the application to do the backup this is not performing the backup.. Im using Nexus one device (connected to WIFI also) .
Could any one please let me know why it is not calling my BackupAgent's onBackup() method?
Am I missing some thing, to include in the Android manifest file or some where in the program?
The below is my manifest file..
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="org.simpledatabackup"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="#drawable/icon" android:label="#string/app_name"
android:backupAgent="MyBackupAgent"
android:debuggable="true">
<activity android:name=".SimpleDatabackup"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<meta-data android:name="com.google.android.backup.api_key"
android:value="AEdPqrEAAAAIZn2ysSLR5wNbcq1uaoWQO0HuipMetQENVTsilw" />
</application>
<uses-sdk android:minSdkVersion="8" />
</manifest>
and the source file is
public class SimpleDatabackup extends Activity {
private SharedPreferences myPrefs ; // Shared Preferences
BackupManager mBackupManager;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
myPrefs = this.getSharedPreferences("shared_prefs", MODE_WORLD_READABLE);
SharedPreferences.Editor edit = myPrefs.edit();
edit.putString("firstname", "uday") ;
edit.putString("lastname", "kiran") ;
edit.commit() ;
mBackupManager.dataChanged();
}
}
My Backup Agent is some thing like this: I have not implemented the functionality inside is onBackup() and onRestore(). Once if it is called i will implement what ever i want..
public class MyBackupAgent extends BackupAgent {
#Override
public void onCreate() {
System.out.println("In MyBackuAgent's onCreate() method");
}
#Override
public void onBackup(ParcelFileDescriptor arg0, BackupDataOutput arg1,
ParcelFileDescriptor arg2) throws IOException {
System.out.println("In MyBackuAgent's onBackup()");
// TODO Auto-generated method stub
}
#Override
public void onRestore(BackupDataInput data, int appVersionCode,
ParcelFileDescriptor newState) throws IOException {
}
}

In the application tag in the manifest include
android:allowBackup="true"
android:restoreAnyVersion="true"
android:backupAgent="<package>.MyBackupAgent"
Please follow the "Testing your BackupAgent" section to invoke the backup instantly for testing.
BackupManagerService schedules the backup regularly in hour interval after the datachanged call to backupmanager. [grepcode]

Global Variable class not working

I am trying to setup and global variable, but I my app fails after adding the following line to my AndroidManifest.xml
<application android:name=".MyApp"
android:icon="#drawable/icon"
android:label="#string/app_name">
I am using the following code as well:
Class:
package com.mynamecompany.datahelp;
import android.app.Application;
class MyApp extends Application {
private String myState;
public String getState(){
return myState;
}
public void setState(String s){
myState = s;
}
}
Usage:
MyApp appState = ((MyApp)getApplicationContext());
String state = appState.getState();
Toast.makeText(getApplicationContext(), "My Value-" + state, Toast.LENGTH_SHORT).show();
appState.setState("Test");
Toast.makeText(getApplicationContext(), "My Value-" + appState.getState(), Toast.LENGTH_SHORT).show();
The program starts and errors immediately on the Splash screen before the usage code can be called further in the program, on a different Activity.
Any ideas?

You are trying to cast to your class from Context. You have to call getApplication.

What's the package indication in your manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mynamecompany">
<application android:name=".datahelp.MyApp"
android:icon="#drawable/icon" android:label="#string/app_name">
...
Probably you have to change it as I made it above. The rest should just work fine, tried it out on my own project.