How to create and register a BroadcastReceiver in code
I am new to android. I am trying to register a BroadcastReceiver in code in my activity. this is my code:
MyReciever class:
public class MyReciever extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.i("===>", "onReceive: "+ intent.getAction());
Toast.makeText(context, "I got it "+ intent.getIntExtra("MyValue",0), Toast.LENGTH_SHORT).show();
}
}
myActivity:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myReciever = new MyReciever();
intentFilter = new IntentFilter();
intentFilter.addAction("test");
}
@Override
protected void onResume() {
registerReceiver(myReciever, intentFilter);
super.onResume();
}
}
manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.safarayaneh.mybroadcastreciever">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
when i run my app nothing happens and no toast appears! I read this and this article and I don't understand where my problem is.
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2 answers
public class MainActivity extends AppCompatActivity {
private IntentFilter intentFilter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//this line makes the broadcastreceiver
BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "I got it "+ intent.getIntExtra("MyValue",0), Toast.LENGTH_SHORT).show();
}
};
//this line register broadcastreceiver
LocalBroadcastManager.getInstance(getContext()).registerReceiver(mBroadcastReceiver, new IntentFilter("test"));
//this line calls the broadcastreceiver
LocalBroadcastManager.getInstance(this).sendBroadcast(new Intent("test"));
}
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Register the broadCast receiver on OnResume and unregister on OnPause like this,
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
myReciever = new MyReciever();
intentFilter = new IntentFilter();
intentFilter.addAction("test");
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
unregisterReceiver(reMyreceive);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
registerReceiver(reMyreceive, filter);
}
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