I'm starting with android and I'm having some lessons to learn some android concepts. In this case, I'm practicing with the BroadCast receivers.
I have to create a BroadCast Receiver that when I boot the phone/emulator, starts an activity which shows a plain text.
I have this class:
public class MainActivity extends Activity {
private final BroadcastReceiver receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
IntentFilter mfilter = new IntentFilter(Intent.ACTION_BOOT_COMPLETED);
registerReceiver(receiver, mfilter);
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
But i'm not getting to do what I need, it simply does nothing, so... What I'm doing wrong here?
In the manifest I just have the activity declared.
Try this...
Step1:
set the permission in AndroidManifest.xml
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
Step2:
Add this is intent filter in receiver,
<receiver android:name=".BootReciever">
<intent-filter >
<action android:name="android.intent.action.BOOT_COMPLETED"/>
<action android:name="android.intent.action.QUICKBOOT_POWERON" />
</intent-filter>
</receiver>
Step3:
Now you can start your application's first activity from onReceive method of Receiver class..
public class BootReciever extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Intent myIntent = new Intent(context, MainActivity.class);
myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(myIntent);
}
}
You can not register ACTION_BOOT_COMPLETED receiver dynamically(it's not a way).
ACTION_BOOT_COMPLETED receiver has to be registered statically in manifest file
ex
<receiver android:name="com.myapp.receiver.BootReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
When you register a receiver in Activity or in Service it's lifetime is bound with them
You need to define your receiver inside app manifest.
For ex:
Class
class MyClass extends BroadCastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
IntentFilter mfilter = new IntentFilter(Intent.ACTION_BOOT_COMPLETED);
registerReceiver(receiver, mfilter);
}
}
Create your own MyReceiver class by extending BroadcastReceiver class, and register your MyReceiver in the manifest with filter ACTION_BOOT_COMPLETED.
<receiver android:name="com.test.MyReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
Related
I created an Application that shares a BroadcastReceiver that launches a Service.
The app that holds the receiver doesn't have activities, there are the receiver class and the services.
Here are the manifest declaration:
<service
android:name=".services.PrintService"
android:enabled="true"
android:exported="true" />
<receiver
android:name=".receivers.MyReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="art.bridge.PRINT_MESSAGE" />
</intent-filter>
</receiver>
Receiver class
public class MyReceiver extends BroadcastReceiver {
public MyReceiver() {
}
#Override
public void onReceive(Context context, Intent intent) {
Log.d(ArtAppl.name , "Receiver reached");
Intent print = new Intent(context, PrintService.class);
if(intent.getStringExtra("message") != null)
print.putExtra("message",intent.getStringExtra("message"));
else
print.putExtra("message","Message not found");
context.startService(print);
}
}
Form an another app, i try to launch the receiver like following:
Intent bReceiver = new Intent("art.bridge.PRINT_MESSAGE");
sendBroadcast(bReceiver);
But the receiver doesn't run.
Am I missing something? Do I have to set another action in the manifest?
Could it be that you need to include Intent.FLAG_INCLUDE_STOPPED_PACKAGES as a flag?
See: How to Send BroadCast from one app to another app
I added a receiver to listen when app is installed. But it is not working. Here is my code in AndroidManifest.xml
<receiver android:enabled="true"
android:exported="true"
android:name="com.bsp.iqtest.reiceiver.IQTestReceiver">
<intent-filter>
<action android:name="android.intent.action.PACKAGE_ADDED" />
<action android:name="android.intent.action.PACKAGE_REPLACED" />
<data android:scheme="package"/>
</intent-filter>
</receiver>
Here is my code in MainActivity (launcher activity) , function onCreate.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
IQTestReceiver br = new IQTestReceiver();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);
intentFilter.addAction(Intent.ACTION_PACKAGE_REPLACED);
intentFilter.addDataScheme("package");
registerReceiver(br, intentFilter);
}
Here is my code in IQTestReceiver (this class is written in other file)
public class IQTestReceiver extends BroadcastReceiver {
public IQTestReceiver() {
}
#Override
public void onReceive(Context context, Intent intent) {
String packageName=intent.getData().getEncodedSchemeSpecificPart();
Log.e("HELLO",packageName);
}
}
I set a breakpoint in onReceive function , but it doesn't run when i debug.
Thanks for your helping.
You can not receive PACKAGE_ADDED or PACKAGE_REPLACED for your own app, if that is what you're trying.
"Broadcast Action: A new application package has been installed on the device. The data contains the name of the package. Note that the newly installed package does not receive this broadcast."
See http://developer.android.com/reference/android/content/Intent.html
set your broadcasrt in manifest like this
<receiver
android:name=".IQTestReceiver"
android:exported="true"
android:enabled="true">
<intent-filter>
<action android:name="check_values"/>
</intent-filter>
</receiver>
and send the broadcast like this.....Intent it1=new Intent(Intent.ACTION_USER_PRESENT);
it1.setAction("check_values");
it1.putExtra("data_key1",message);
sendBroadcast(it1);
and in on receive would be like this....
#Override
public void onReceive(Context context, Intent intent)
{
data1=intent.getStringExtra("data_key1");
System.out.println("ffffff11" + data1);
}
I have an application that use parse push notification service. Here is the class that I'm using for receiving notification:
public class MessageReceiver extends ParsePushBroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
//...some code in here
}
And I also register this custom receiver in my manifest:
<receiver
android:name="com.package.MessageReceiver"
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>
Everything is fine with notification system. After a notification have received, I want to update the running activity UI accordingly (like showing an icon for new notification) but I don't have access to the activity object in onReceive method. What is the best practice to do that? I couldn't use the context object in this matter.
Thanks
I believe you can accomplish this by using a BroadcastReceiver.
You would define the receiver in the activities you want to have access to,
See snippet below.
public MyActivity extends Activity
{
//... code
private BroadcastReceiver receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
//... update ui here
}
};
#Override
protected void onResume() {
IntentFilter filter = new IntentFilter();
filter.addAction("suitablename");
registerReceiver(receiver, filter);
super.onResume();
}
#Override
protected void onPause() {
unregisterReceiver(receiver);
super.onPause();
}
//... code
}
Then in your custom receiver send the broadcast.
public class MessageReceiver extends ParsePushBroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
//...some code in here
Intent intent = new Intent();
intent.setAction("suitablename");
context.sendBroadcast(intent);
}
}
Don't forget to update the manifest
<activity
android:name=".MyActivity" >
<intent-filter>
<action android:name="suitablename"></action>
</intent-filter>
</activity>
I have registered a BroadcastReceiver in manifest:
<receiver android:name=".OrderReceiver" android:permission="com.google.android.c2dm.permission.SEND" android:exported="true">
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.gndp" />
</intent-filter>
</receiver>
and in OrderReceiver class I'm trying to broadcast a received intent this way:
public class OrderReceiver extends BroadcastReceiver {
public void onReceive(Context mContext, Intent intent) {
if(intent.getAction().equals("com.google.android.c2dm.intent.REGISTRATION")) {
intent.setAction("com.gndp.device.REGISTERED");
mContext.sendBroadcast(intent); //BAZINGA
}
}
This broadcasted intent(BAZINGA) is received in this class(OrderReceiver) but not in another activity where i want to receive it. Here's the activity:
public class RegisterActivity extends Activity {
private BroadcastReceiver deviceRegisteredBroadcastReciever;
#Override
onCreate(){
...
deviceRegisteredBroadcastReciever = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
//broadcast never reach here<----PROBLEM
}
}
#Override
onResume() {
...
LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(mContext);
lbm.registerReceiver(deviceRegisteredBroadcastReciever, new IntentFilter("com.gndp.device.REGISTERED"));
}
}
Have tried a lot of things including sending broadcast by instance of LocalBroadcastManager, using an inner class instead of BroadcastReceiver in the activity.
RegisterActivity is in foreground when OrderReceiver receives its first broadcast and it stays in foreground.
You send a global broadcast in the OrderReceiver by calling sendBroadcast of Context class and trying to receive this with LocalBroadcastManager.
You should either broadcast with LocalBroadcastManager or register ordinary BroadcastReceiver with Activity.registerReceiver method in the RegisterActivity.
I have a onBootCompleted broadcast receiver registered in the manifest.
It runs starts MyService. My service in the onCreate registers 3 more broadcast receivers dynamically.
The 3 new receivers filter on the following intent actions
LOCALE_CHANGED,
TIMEZONE_CHANGED and
CONNECTIVITY_CHANGED.
These works correctly when I run the application from Eclipse but, after I reboot the device and my service starts up none of receivers work.
I have a work around implementation but, I would like to know why this is happening?
Manifest:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<receiver android:name=".receiver.BootCompletedReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<category android:name="android.intent.category.HOME" />
</intent-filter>
</receiver>
<service
android:name=".MyService"
android:enabled="true"
android:exported="false"
android:stopWithTask="false" >
</service>
Service:
public class MyService()
{
LocationTimeZoneChangedReceiver mLocationTimeZoneChangedReceiver = new LocationTimeZoneChangedReceiver()
NetworkChangedReceiver mNetworkChangedReceiver = new NetworkChangedReceiver()
public void onCreate()
{
registerReceiver(mLocationTimeZoneChangedReceiver, new IntentFilter(Intent.ACTION_LOCALE_CHANGED));
registerReceiver(mLocationTimeZoneChangedReceiver, new IntentFilter(Intent.ACTION_TIMEZONE_CHANGED));
registerReceiver(mNetworkChangedReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
}
}
BootCompletedReceiver:
public class BootCompletedReceiver extends BroadcastReceiver
{
public void onReceive(Context context, Intent intent){}
}
MyApplication:
public class MyApplication extends Application
{
ServiceConnection mServiceConnection = new ServiceConnection() { anonymous class...}
public void onCreate()
{
bindService(new Intent(this, MyService.class), mServiceConnection,Context.BIND_AUTO_CREATE);
}
}
Edited:
Edited code for Plinio.Santos.
It's a big app with many moving parts so at best I can post small code snippets.
Following are the steps I am following for testing:
Push app via Eclipse,
test that network change receiver is working
leave wifi off
Now restart the device
wait for the process to start and turn on wifi.
I believe that the service is not started or bound due errors. Unfortunately I can not say it for sure without all binding/starting code.
Anyway, you can see bellow a code that worked fine after I rebooted (the app started, registered the receiver and is receiving the CONNECTIVITY_CHANGED broadcast.
AndroidManifest.xml:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<receiver android:name=".TestReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<service
android:name=".TestService"
android:exported="true" />
Receiver class:
public class TestReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if (intent != null && Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {
Toast.makeText(context, "Intent.ACTION_BOOT_COMPLETED receiverd !", Toast.LENGTH_SHORT).show();
context.startService(new Intent(context, TestService.class));
}
}
}
Service class:
public class TestService extends Service {
private BroadcastReceiver mConnectivityChangedReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
if (intent != null && ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {
Toast.makeText(context, "ConnectivityManager.CONNECTIVITY_ACTION receiverd !", Toast.LENGTH_SHORT).show();
}
}
};
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
registerReceiver(mConnectivityChangedReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
}
}