动态广播接收器未注册

Question

I have registered broadcast receiver statically and it's working perfectly fine. But I have to register it dynamically as my activity is to receive data from a broadcast receiver.

MyReceiver.java

public class MyReceiver extends BroadcastReceiver {

    String TAG = "MyReceiver:";

    @Override
    public void onReceive(Context ctx, Intent intent) {

        if(intent.getAction().equals(Intent.ACTION_PACKAGE_ADDED)){
            Uri data = intent.getData();
            String packageName = intent.getData().getSchemeSpecificPart();
            Log.d(TAG, "Action: " + intent.getAction());
            Log.d(TAG, "The DATA Now: " + data);
            Log.d(TAG, "The Name Now: " + packageName);

            Intent i = new Intent(ctx, MainActivity.class);
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            i.putExtra("message", packageName);
            Log.d(TAG,"Starting list act");
            ctx.startActivity(i);
        }
    }
}

MainActivity.java

public class MainActivity extends Activity {

    MyReceiver receiver;
    IntentFilter intent;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        receiver = new MyReceiver();
        intent = new IntentFilter(); 
        intent.addAction("android.intent.action.PACKAGE_ADDED");
        this.registerReceiver(receiver, intent);
        Log.v("calling Dynamic Broadcast()", "MainActivity");

        Intent intent = getIntent();
        String message1 = intent.getStringExtra("message");

        Log.v("Back From Rcver:", "added pkg is: " + message1);
    }
}

Here is the log:

01-19 11:48:36.372: V/calling Dynamic Broadcast()(3053): MainActivity

I am unable to get package_add logs from MyReceiver class once package is added. What I am doing wrong?

Any help would be really appreciated.

Answer 1

The important thing is not to forget about data scheme in the intent filter:

IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
filter.addDataScheme("package");
mContext.registerReceiver(mReceiver, filter);

Answer 2

A simple mistake you done at

intent.addAction("android.intent.action.PACKAGE_REMOVED");

you have registered only package removed action in IntentFilter

its something like this...

intent.addAction(Intent.ACTION_PACKAGE_ADDED);
intent.addAction(Intent.ACTION_PACKAGE_REMOVED);

EDIT:

still there is typo mistake in your code.

intent.addAction("android.intent.action.PACKAGE_ADD");

should be

intent.addAction("android.intent.action.PACKAGE_ADDED"); // last two characters ED are missing

use predifined Constant Strings of Intent to avoid typo mistake...

intent.addAction(Intent.ACTION_PACKAGE_ADDED);

Answer 3

尝试将默认类别添加到您的IntentFilter：

filter.addCategory(Intent.CATEGORY_DEFAULT);

Answer 4

This is my personal suggestion don't add dynamic broadcast receiver onReceive in broadcast file. Add it on first activity or main activity of your application. If you needed it only when your application is open. But if you need it always received response just added it on manifest file

Register dynamic broadcast receiver on main activity

MyReceiver reciver;

@Override
protected void onResume() {
    super.onResume();
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);
    reciver = new MyReceiver();
    registerReceiver(reciver, intentFilter);
}

Unregister that broadcast receiver on activity stop or closed

@Override
protected void onStop() {
    super.onStop();
    unregisterReceiver(reciver);
}