How to call MainActivity function from the extended BroadcastReceiver class

How to call MainActivity function from the extended BroadcastReceiver class - android

I can not find answer for this problem.
I am building some Android application based on sms services and
I found callback very difficult.
I want/need to call my primary application class MainActivity from inside function onReceive (class SMSReceiver).
Toast works perfectly but any attempt to call public void OnSmsReceived() (class MainActivity) is unsuccessful.
// Main class
public class MainActivity extends Activity {
public void OnSmsReceived() {
System.out.println(TAG + ": OnSmsReceived " + "OK ");
}
/* more not important at this moment code bellow */
}
// Brodcast class
public class SMSReceiver extends BroadcastReceiver {
private static final String TAG = "SMSReceiver";
#Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "SMS received.", Toast.LENGTH_LONG).show();
System.out.println(TAG + ": " + "onReceive");
//How to call MainActivity form here?
}
}

Ok, I finaly made that working:
This is really working code
Thank you for intent ...
//Android Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="sms.pack.sms201"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="8" />
<uses-permission android:name="android.permission.BROADCAST_SMS"/>
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="sms.pack.sms201.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>
<receiver
android:name="sms.pack.sms201.SMSReceiver"
android:enabled="true"
android:exported="true"
android:permission="android.permission.BROADCAST_SMS">
<intent-filter android:priority="1000">
<action android:name="android.provider.Telephony.SMS_RECEIVED"/>
</intent-filter>
</receiver>
</application>
</manifest>
//SMSReceiver class
public class SMSReceiver extends BroadcastReceiver {
private static final String TAG = "SMSReceiver";
public static String Test = "empty";
#Override
public void onReceive(Context context, Intent intent) {
Log.v(TAG, "onReceive");
Toast.makeText(context, "SMS received.", Toast.LENGTH_LONG).show();
Bundle bundle = intent.getExtras();
if( bundle != null) {
Log.v(TAG, "onReceive.bundle != null");
Test = String.valueOf(bundle.size());
}
Intent callingIntent = new Intent(context, MainActivity.class);
callingIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
callingIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
String value = "Extra val=" + Test;
callingIntent.putExtra("SMSR", value);
context.startActivity(callingIntent);
}
}
//MainActivity class
public class MainActivity extends Activity {
private static final String TAG = "MainActivity";
TextView tvGenLog;
protected void appendGenLog(String txt) {
txt = tvGenLog.getText() + txt + "\r\n";
tvGenLog.setText(txt);
}
private String memberFieldString;
#Override
protected void onNewIntent(Intent intent) {
appendGenLog(TAG + ".onNewIntent");
memberFieldString = intent.getStringExtra("SMSR");
appendGenLog("memberFieldString=" + memberFieldString);
appendGenLog("Take data from SMSReceiver,");
appendGenLog("SMSR=" + SMSReceiver.Test);
super.onNewIntent(intent);
} // End of onNewIntent(Intent intent)
#Override
protected void onResume() {
super.onResume();
//appendGenLog(TAG + ".onResume");
if (getIntent()!=null && getIntent().getExtras()!=null) {
appendGenLog(TAG + ".onResume" + ":" + getIntent().getExtras().getString("SMSR"));
}
else {
appendGenLog(TAG + ".onResume" + ": null");
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.v(TAG, ".onCreate");
tvGenLog = (TextView) findViewById(R.id.tvGenLog);
appendGenLog(TAG + " Created");
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}

use context in the onReceive Method and call context.startActivity(context , yourActivity.class);

you can't use context.startActivity(context , MainActivity.class);
but you can choose below method to resolve this issue:
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
context.startActivity(intent, bundle)

I experimented lots of approaches.
I did not say but it is for targetSdkVersion="8"
and some of those functions you gave me did not work on this old system
I could not find working way with use of context and intent. This always caused crash.
I found way with static fields and function in MainActivity,even that works and print something, it crushed after that....
After all this works for me very well.
Of course it is draft but this allow to work with main class.
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="sms.pack.sms0"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="8" />
<uses-permission android:name="android.permission.BROADCAST_SMS"/>
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="sms.pack.sms0.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>
</application>
</manifest>
strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">sms0</string>
<string name="action_settings">Settings</string>
<string name="sGenInfo">GenInfo</string>
</resources>
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res/sms.pack.sms0"
android:id="#layout/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/tvGenInfo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/sGenInfo" />
</LinearLayout>
MainActivity.java
package sms.pack.sms0;
import android.util.Log;
import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private static final String TAG = "MainActivity";
private static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";
TextView tvGenInfo;
public void appendGenInfo(String txt) {
Log.v(TAG, "genLog, txt=" + txt);
txt = tvGenInfo.getText() + txt + "\r\n";
tvGenInfo.setText(txt);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.v(TAG, "onCreate");
tvGenInfo = (TextView) findViewById(R.id.tvGenInfo);
IntentFilter filter = new IntentFilter(Intent.ACTION_DEFAULT);
filter.addAction(SMS_RECEIVED);
filter.setPriority(1000);
this.registerReceiver(this.smsReceiver, filter);
appendGenInfo("Created");
}
private BroadcastReceiver smsReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
Log.v(TAG, "smsReceiver.onReceive, " + "");
Toast.makeText(context, "smsReceiver.onReceive, " + "", Toast.LENGTH_SHORT).show();
System.out.println(TAG + ", smsReceiver.onReceive, " + "");
Bundle bundle = intent.getExtras();
if( bundle != null) {
System.out.println(TAG + ", smsReceiver.onReceive.bundle, size=" + bundle.size());
appendGenInfo(TAG + ", smsReceiver.onReceive.bundle, " + "bundle.size=" + bundle.size());//this works
}
}
};
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}

Related

Toast on SMS receive ANDROID STUDIO NOT WORKING

For the program of toast presentation on sms receive in ANDROID STUDIO,Im getting no errors...but it is not working in any of my phones(Used Samsung GT-i9082 and lenovo a6000+)..Here is my code and the manifest following respectively.. ...
package com.myapplication.siva.phoneapp;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity{
private BroadcastReceiver receiver;
public static final String SMS_BUNDLE = "pdus";
private static String TAG="com.myapplication.siva.phoneapp";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.i(TAG,"Inside onCreate");
receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
Bundle intentExtras = intent.getExtras();
Log.i(TAG,"Inside on Receive");
try {
Toast.makeText(context, "Coming Inside",Toast.LENGTH_SHORT).show();
Log.i(TAG,"Inside try");
if (intentExtras != null) {
Object[] sms = (Object[]) intentExtras.get(SMS_BUNDLE);
String smsMessageStr = "";
for (int i = 0; i < sms.length; ++i) {
SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) sms[i]);
String smsBody = smsMessage.getMessageBody().toString();
String address = smsMessage.getOriginatingAddress();
smsMessageStr += "SMS From: " + address + "\n";
smsMessageStr += smsBody + "\n";
}
Toast.makeText(context, smsMessageStr, Toast.LENGTH_SHORT).show();
}
}catch (Exception e)
{
Log.i(TAG,"Some Exception");
}
}
};
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.myapplication.siva.phoneapp" >
<uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>
<uses-permission android:name="android.permission.READ_SMS"></uses-permission>
<uses-permission android:name="android.permission.hardware_test"></uses-permission>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<receiver
android:name=".MainActivity"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED"> </action>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</receiver>
</activity>
</application>
</manifest>

Mike M is perfectly correct your intent filter should contain action for sms, i.e., "android.provider.Telephony.SMS_RECEIVED" not something else.
Secondly you require an activity to launch am broadcast receiver from android 3.1 for security issues.

broadCast Receiver is never called

I am trying to detect if the WiFi is connected or not by listening to the "SUPPLICANT_CONNECTION_CHANGE_ACTION" as shown below in the code. But the problem is
when i run the App i receive no notificatio from the broadCast Receiver i am registered to!!
why that is happening and how to solve it?
code:
IntentFilter intentFilter2 = new IntentFilter(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION);
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ConnectivityModule();
}
protected void ConnectivityModule() {
// TODO Auto-generated method stub
Log.d(TAG, "#interNetConnectivityModule: called");
registerReceiver(SupplicantReceiver, intentFilter2);
}
BroadcastReceiver SupplicantReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
final String action = intent.getAction();
if (action.equals(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION)) {
SupplicantState supplicantState = (SupplicantState)intent.getParcelableExtra(WifiManager.EXTRA_NEW_STATE);
if (supplicantState == (SupplicantState.COMPLETED)) {
Log.d(TAG, "#SupplicantReceiver: connected");
}
if (supplicantState == (SupplicantState.DISCONNECTED)) {
Log.d(TAG, "#SupplicantReceiver: not connected");
}
}
}
};

Here is Example :
Main Activity
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.content.Intent;
import android.view.View;
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
// broadcast a custom intent.
public void broadcastIntent(View view)
{
Intent intent = new Intent();
intent.setAction("com.tutorialspoint.CUSTOM_INTENT");
sendBroadcast(intent);
}
}
My Broadcast Receiver :
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 context, Intent intent) {
Toast.makeText(context, "Intent Detected.", Toast.LENGTH_LONG).show();
}
}
This is how you should declare Broadcast Receiver in your Manifest :
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.helloworld"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="#drawable/ic_launcher"
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>
<receiver android:name="MyReceiver">
<intent-filter>
<action android:name="com.tutorialspoint.CUSTOM_INTENT">
</action>
</intent-filter>
</receiver>
</application>
</manifest>
Main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button android:id="#+id/btnStartService"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/broadcast_intent"
android:onClick="broadcastIntent"/>
</LinearLayout>

Your receiver looks correctly registered (at runtime, not based on Manifest, but whatever, should be good anyway).
I'm guessing.. have you tried putting logs in onReceive method like
#Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Log.d(TAG, "Reached this point, receiver is working");
final String action = intent.getAction();
if (action.equals(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION)) {
SupplicantState supplicantState = (SupplicantState)intent.getParcelableExtra(WifiManager.EXTRA_NEW_STATE);
if (supplicantState == (SupplicantState.COMPLETED)) {
Log.d(TAG, "#SupplicantReceiver: connected");
}
if (supplicantState == (SupplicantState.DISCONNECTED)) {
Log.d(TAG, "#SupplicantReceiver: not connected");
}
Log.d(TAG, "Checking for an error in retrieving data!");
boolean myTest = intent.getBooleanExtra(EXTRA_SUPPLICANT_CONNECTED, false);
if (myTest) Log.d(TAG, "This way it worked!");
else Log.d(TAG, "This does not mean it didn't work at all! Might just be the correct value as a DISCONNECTED status");
} else Log.d(TAG, "Bizzarre error, action received was different from the one receiver was registered to! [ " + action + " ] ");
}
My guess is that you might be trying to retrieve the information in a wrong way, and with logs so strictly defined you can't see enough of what happens, but the receiver works fine

Sending data to fragment from service

i have a string in my service, and i want to send it to fragment. But it seems onReceive() method on my BroadcastReceiver never called, and i just can't figured out why. Thanks for answers.
My Service Class
public class Servis extends Service {
static final String MAP = "MyService";
static final String USERID = "";
public static final String FILEPATH = "filepath";
#Override
public int onStartCommand(Intent intent, int flags, int startId)
{
System.out.println("starting service");
Toast.makeText(this, "service starting", Toast.LENGTH_SHORT).show();
String id = intent.getStringExtra("UserID");
System.out.println(id);
Intent intent1 = new Intent(MAP);
intent1.putExtra(USERID, id);
sendBroadcast(intent1);
return START_REDELIVER_INTENT;
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
Log.d(MAP, "onCreate");
}
#Override
public void onDestroy() {
Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
Log.d(MAP, "onDestroy");
}
#Override
public void onStart(Intent intent, int startid) {
Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
Log.d(MAP, "onStart");
}
}
My Fragment Class
package com.example.mobilproje;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.widget.Toast;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapFragment extends FragmentActivity{
private GoogleMap googleHarita;
private BroadcastReceiver receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
Bundle bundle = intent.getExtras();
handleResult(bundle);
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map_fragment);
registerReceiver(receiver, new IntentFilter(
Servis.MAP));
if (googleHarita == null) {
googleHarita = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.haritafragment))
.getMap();
if (googleHarita != null)
LatLng EvKoordinat = new LatLng(40.7994211,29.9517352);
googleHarita.addMarker(new MarkerOptions().position(EvKoordinat).title("Ev"));
googleHarita.moveCamera(CameraUpdateFactory.newLatLngZoom(EvKoordinat, 13));
}
}
}
#Override
public void onResume() {
registerReceiver(receiver, new IntentFilter(
Servis.MAP));
}
private void handleResult(Bundle bundle) {
if (bundle != null) {
String string = bundle.getString(Servis.USERID);
System.out.println("string");
}
}
}
AndroidManifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.mobilproje"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="13"
android:targetSdkVersion="23" />
<uses-permission android:name="android.permission.NFC" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-feature
android:glEsVersion="0x00020000"
android:required="true" />
<application
android:allowBackup="true"
android:icon="#drawable/nfc"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:theme="#style/mytheme"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.nfc.action.TECH_DISCOVERED" />
<action android:name="android.nfc.action.NDEF_DISCOVERED" />
<action android:name="android.nfc.action.TAG_DISCOVERED" />
</intent-filter>
<meta-data
android:name="android.nfc.action.TECH_DISCOVERED"
android:resource="#xml/nfc_tech_filter" />
</activity>
<activity
android:name=".MapFragment"
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.maps.v2.API_KEY"
android:value="AIzaSyCgPPczPpQA_00_v-nTux_WuGuaO9egUpc" />
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<service android:enabled="true" android:name=".Servis" android:process=":localservice"/>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
</manifest>

how to start the app on power button press

I want to start my app when a user press the power button. I m following This code
but its not showing any Log and toast.
here is my complete code.
MyReceiver.java
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
public class MyReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Log.v("onReceive", "Power button is pressed.");
Toast.makeText(context, "power button clicked", Toast.LENGTH_LONG)
.show();
// perform what you want here
}
}
menifest File
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.powerbuttontest"
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:theme="#style/AppTheme" >
<activity
android:name="com.example.powerbuttontest.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>
<receiver android:name=".MyReceiver" >
<intent-filter>
<action android:name="android.intent.action.SCREEN_OFF" >
</action>
<action android:name="android.intent.action.SCREEN_ON" >
</action>
<action android:name="android.intent.action.ACTION_POWER_CONNECTED" >
</action>
<action android:name="android.intent.action.ACTION_POWER_DISCONNECTED" >
</action>
<action android:name="android.intent.action.ACTION_SHUTDOWN" >
</action>
</intent-filter>
</receiver>
</application>
</manifest>
MainActivity.java
package com.example.powerbuttontest;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
#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;
}
}
I think i m committing a mistake in my menifest file. please have a look on this. thanks.

First, unlike other broad casted intents, for Intent.ACTION_SCREEN_OFF and Intent.ACTION_SCREEN_ON you CANNOT declare them in your Android Manifest! so You need to make a service which will keep on running like this
public static class UpdateService extends Service {
#Override
public void onCreate() {
super.onCreate();
// register receiver that handles screen on and screen off logic
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
BroadcastReceiver mReceiver = new Receiver();
registerReceiver(mReceiver, filter);
}
#Override
public void onStart(Intent intent, int startId) {
boolean screenOn = intent.getBooleanExtra("screen_state", false);
if (!screenOn) {
// your code
} else {
// your code
}
}
}
and your receiver can be something
public class Receiver extends BroadcastReceiver {
private boolean screenOff;
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
screenOff = true;
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
screenOff = false;
}
Intent i = new Intent(context, UpdateService.class);
i.putExtra("screen_state", screenOff);
context.startService(i);
}
}

Here is my complete code. Hope this helps. I was basically making a look screen app. This will disable your default lock screen. and on power button press it will start a service and runs to look for power button press event.
Layout.xml
<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" >
<Button
android:id="#+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/toggleButton1"
android:layout_marginTop="72dp"
android:enabled="false"
android:text="Settings" />
<ToggleButton
android:id="#+id/toggleButton1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="72dp"
android:checked="true"
android:textOff="Disable"
android:textOn="Enable" />
</RelativeLayout>
MainActivity.java
package com.example.powerbuttontest;
import android.app.Activity;
import android.app.KeyguardManager;
import android.app.KeyguardManager.KeyguardLock;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
import android.widget.ToggleButton;
public class MainActivity extends Activity {
ToggleButton btnToggleLock;
Button btnMisc;
Toast toast;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnMisc = (Button) findViewById(R.id.button1);
btnToggleLock = (ToggleButton) findViewById(R.id.toggleButton1);
toast = Toast.makeText(getApplicationContext(), "", Toast.LENGTH_SHORT);
btnToggleLock.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (btnToggleLock.isChecked()) {
toast.cancel();
toast.setText("Unlocked");
toast.show();
Log.i("Unlocked", "If");
Context context = getApplicationContext();
KeyguardManager _guard = (KeyguardManager) context
.getSystemService(Context.KEYGUARD_SERVICE);
KeyguardLock _keyguardLock = _guard
.newKeyguardLock("KeyguardLockWrapper");
_keyguardLock.disableKeyguard();
MainActivity.this.startService(new Intent(
MainActivity.this, UpdateService.class));
} else {
toast.cancel();
toast.setText("Locked");
toast.show();
Context context = getApplicationContext();
KeyguardManager _guard = (KeyguardManager) context
.getSystemService(Context.KEYGUARD_SERVICE);
KeyguardLock _keyguardLock = _guard
.newKeyguardLock("KeyguardLockWrapper");
_keyguardLock.reenableKeyguard();
Log.i("Locked", "else");
MainActivity.this.stopService(new Intent(MainActivity.this,
UpdateService.class));
}
}
});
}
#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 void onConfigurationChanged(Configuration newConfig) {
// TODO Auto-generated method stub
super.onConfigurationChanged(newConfig);
Log.i("onConfigurationChanged", "Called");
}
}
MyReciever.java
package com.example.powerbuttontest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
public class MyReceiver extends BroadcastReceiver {
private boolean screenOff;
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
screenOff = true;
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
screenOff = false;
}
Intent i = new Intent(context, UpdateService.class);
i.putExtra("screen_state", screenOff);
context.startService(i);
}
}
UpdateService.java
package com.example.powerbuttontest;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;
public class UpdateService extends Service {
BroadcastReceiver mReceiver;
#Override
public void onCreate() {
super.onCreate();
// register receiver that handles screen on and screen off logic
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
mReceiver = new MyReceiver();
registerReceiver(mReceiver, filter);
}
#Override
public void onDestroy() {
unregisterReceiver(mReceiver);
Log.i("onDestroy Reciever", "Called");
super.onDestroy();
}
#Override
public void onStart(Intent intent, int startId) {
boolean screenOn = intent.getBooleanExtra("screen_state", false);
if (!screenOn) {
Log.i("screenON", "Called");
Toast.makeText(getApplicationContext(), "Awake", Toast.LENGTH_LONG)
.show();
} else {
Log.i("screenOFF", "Called");
// Toast.makeText(getApplicationContext(), "Sleep",
// Toast.LENGTH_LONG)
// .show();
}
}
#Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
}
Menifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.powerbuttontest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.DISABLE_KEYGUARD"/>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".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>
<receiver android:name=".MyReceiver" />
<service android:name=".UpdateService" />
</application>
</manifest>

Here this one is the complete code, which will open your application as soon you presss power button. I am also doing the same project, where i want to open my Application directly after i press power button (turn on).
MainActivity.java
public class MainActivity extends Activity
{
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_switch_power_offon);
startService(new Intent(getApplicationContext(), LockService.class));
}//EOF Oncreate
}//EOF Activity
LockService.java
public class LockService extends Service {
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId)
{
final IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_USER_PRESENT);
final BroadcastReceiver mReceiver = new ScreenReceiver();
registerReceiver(mReceiver, filter);
return super.onStartCommand(intent, flags, startId);
}
public class LocalBinder extends Binder
{
LockService getService() {
return LockService.this;
}
}//EOF SERVICE
ScreenReceiver.java
public class ScreenReceiver extends BroadcastReceiver {
public static boolean wasScreenOn = true;
public void onReceive(final Context context, final Intent intent) {
Log.e("LOB","onReceive");
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF))
{
// do whatever you need to do here
wasScreenOn = false;
//Log.e("LOB","wasScreenOn"+wasScreenOn);
Log.e("Screen ","shutdown now");
}
else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON))
{
// and do whatever you need to do here
wasScreenOn = true;
Log.e("Screen ","awaked now");
Intent i = new Intent(context, MainActivity.class); //MyActivity can be anything which you want to start on bootup...
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
else if(intent.getAction().equals(Intent.ACTION_USER_PRESENT))
{
Log.e("LOB","userpresent");
// Log.e("LOB","wasScreenOn"+wasScreenOn);
}
}
}//EOF SCREENRECEIVER.JAVA
Now this is xml file, Please copy paste and just change the package name you are using
<?xml version="1.0" encoding="utf-8"?>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.userpresent.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.example.userpresent.LockService" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</service>
</application>

Android GCM Registration Id

I want to use GCM. I tried with following in the client side:
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.test" android:installLocation="preferExternal" 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_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<permission android:name="com.example.test.permission.C2D_MESSAGE" android:protectionLevel="signature" />
<uses-permission android:name="com.example.test.permission.C2D_MESSAGE" />
<application android:icon="#drawable/ic_launcher" android:label="#string/app_name" >
<activity android:screenOrientation="portrait"
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#android:style/Theme.NoTitleBar.Fullscreen" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name="com.google.android.gcm.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.test" />
</intent-filter>
</receiver>
<service android:name=".GCMIntentService" android:enabled="true" />
</application>
</manifest>
Activity:
package com.example.test;
import com.google.android.gcm.GCMRegistrar;
import android.os.Bundle;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
import android.view.WindowManager;
import android.widget.Toast;
public class MainActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gcmRelated();
}
private void gcmRelated() {
GCMRegistrar.checkDevice(this);
GCMRegistrar.checkManifest(this);
final String regId = GCMRegistrar.getRegistrationId(this);
Toast.makeText(this, regId, 10000).show();
if (regId.equals("")) {
GCMRegistrar.register(this, "609612932495");
} else {
Log.v("Register", "Already registered");
}
}
}
GCMIntentService.java:
package com.example.test;
import com.google.android.gcm.GCMBaseIntentService;
import com.google.android.gcm.GCMRegistrar;
import android.content.Context;
import android.content.Intent;
import android.os.PowerManager;
import java.util.logging.Logger;
public class GCMIntentService extends GCMBaseIntentService
{
private static PowerManager.WakeLock sWakeLock;
private static final Object LOCK = GCMIntentService.class;
private static final String GCM_SENDER_ID = "609612932495";
private static final String GCM_INTENT_FILTER = "com.example.test.GCM_MESSAGE";
private static final String MESSAGE_TYPE = "Type";
private static final String MESSAGE_CONTENT = "Body";
private static Logger log = Logger.getLogger(GCMIntentService.class.getName());
public GCMIntentService()
{
super(GCM_SENDER_ID);
}
static void runIntentInService(Context context,Intent intent)
{
synchronized(LOCK)
{
if (sWakeLock == null)
{
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
sWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,"sc_wakelock");
}
}
sWakeLock.acquire();
intent.setClassName(context,GCMIntentService.class.getName());
context.startService(intent);
}
#Override protected void onRegistered(Context context,String registrationId)
{
log.warning("From GCMIntentService: Device successfully registered as "+registrationId);
}
#Override protected void onUnregistered(Context context,String registrationId)
{
log.warning("From GCMIntentService: Device successfully unregistered");
}
#Override protected void onMessage(Context context,Intent messageIntent)
{
log.warning("From GCMIntentService: Game update notice received");
}
#Override protected void onDeletedMessages(Context context,int total)
{
log.warning("From GCMIntentService: Server deleted "+Integer.toString(total)+" pending messages");
}
#Override public void onError(Context context,String errorId)
{
log.warning("From GCMIntentService: Error "+errorId);
}
#Override protected boolean onRecoverableError(Context context,String errorId)
{
log.warning("From GCMIntentService: Recoverable error "+errorId);
return(super.onRecoverableError(context,errorId));
}
}
It's showing no error. GCMRegistrar.getRegistrationId(this) is always returning " "(empty string). So, It always tries to register and I never got registerId.
Anything to be done?
Also, While implementing the server side code, Do I need to send this register Id and save all the id's in a database and send them?

public class GCMIntentService extends GCMBaseIntentService {
#SuppressWarnings("unused")
private final String TAG = "GCMIntentService";
public GCMIntentService() {
super("GCM_ID");
}
/**
* Issues a notification to inform the user that server has sent a message.
*/
public void generateNotification(Context context, String message) {
long when = System.currentTimeMillis();
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(R.drawable.ic_launcher, message, when);
String title = context.getString(R.string.app_name);
Intent notificationIntent = new Intent(context, SamplePushActivity.class);
PendingIntent intent = PendingIntent.getActivity(context, 0, notificationIntent, android.content.Intent.FLAG_ACTIVITY_NEW_TASK);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
notification.setLatestEventInfo(context, title, message, intent);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notification.defaults |= Notification.DEFAULT_SOUND | Notification.DEFAULT_LIGHTS;
notificationManager.notify(0, notification);
}
#Override
protected void onError(Context arg0, String arg1) {
}
#Override
protected void onMessage(Context arg0, Intent arg1) {
Resources res = getResources();
Log.d("GCM", "RECIEVED A MESSAGE");
// Get the data from intent and send to notificaion bar
System.out.println("MEssage Recieved :" + arg1.getStringExtra("message"));
System.out.println("Data Recieved :" + arg1.getExtras().getString("collapse_key"));
// generateNotification(arg0, arg1.getStringExtra("state"));
// generateNotification(arg0, arg1.getStringExtra("message"));
generateNotification(arg0, res.getString(R.string.assignment_new, "arg1", "arg2"));
// String notifyMessage = arg1.getStringExtra("collapse_key");
// if
// (arg1.getStringExtra("collapse_key").equalsIgnoreCase("NOTIFICATION_ASSIGNMENT"))
// {
// generateNotification(arg0, arg1.getStringExtra("message"));
// }
}
#Override
protected void onRegistered(Context arg0, String arg1) {
// TODO Auto-generated method stub
}
#Override
protected void onUnregistered(Context arg0, String arg1) {
// TODO Auto-generated method stub
}
public class SamplePushActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView regNumber = (TextView) findViewById(R.id.textView1);
GCMRegistrar.checkDevice(this);
GCMRegistrar.checkManifest(this);
if (GCMRegistrar.isRegistered(this)) {
Log.d("info", GCMRegistrar.getRegistrationId(this));
}
final String regId = GCMRegistrar.getRegistrationId(this);
regNumber.setText(regId);
if (regId.equals("")) {
// replace this with the project ID
System.out.println("registration ID is " + regId);
GCMRegistrar.register(this, "GCM_ID");
Log.d("info", GCMRegistrar.getRegistrationId(this));
System.out.println("Get Reg ID: " + GCMRegistrar.getRegistrationId(this));
regNumber.setText(regId);
} else {
Log.d("info", "already registered as" + regId);
}
}
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<permission
android:name="in.android.gcm.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="in.android.gcm.permission.C2D_MESSAGE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name" >
<activity
android:name=".SamplePushActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name="com.google.android.gcm.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="in.android.gcm" />
</intent-filter>
</receiver>
<service android:name=".GCMIntentService" />
</application>

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.

How to call MainActivity function from the extended BroadcastReceiver class - android

use context in the onReceive Method and call context.startActivity(context , yourActivity.class);

you can't use context.startActivity(context , MainActivity.class); but you can choose below method to resolve this issue: intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(intent); context.startActivity(intent, bundle)

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