Android Broadcast Receiver-android learning tour

Android Broadcast Receiver-android learning tour
First, inherit the BroadcastReceiver class and register it in manifest.

public class MyReceiver extends BroadcastReceiver {    public MyReceiver() {    }    @Override    public void onReceive(Context context, Intent intent) {        throw new UnsupportedOperationException(Not yet implemented);    }}

Register in mainifest

Dynamically register and cancel broadcast receivers

Code:
Worker Er:

public class MyReceiver extends BroadcastReceiver {    public static final String ACTION = peng.liu.testview.intent.action.MyReceiver;    public MyReceiver() {    }    @Override    public void onReceive(Context context, Intent intent) {        System.out.println(intent.getStringExtra(data)+hello);    }}

Main class:

public class MainActivity extends Activity implements View.OnClickListener{    private MyReceiver receiver = null;    private Button send,reg,unReg;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        findViewById(R.id.send).setOnClickListener(this);        findViewById(R.id.reg).setOnClickListener(this);        findViewById(R.id.unReg).setOnClickListener(this);    }    @Override    public void onClick(View view) {        switch (view.getId()){            case R.id.send:                Intent intent = new Intent(MyReceiver.ACTION);                intent.putExtra(data,jiekxueyuan);                sendBroadcast(intent);                break;            case R.id.reg:                if (receiver == null){                    receiver = new MyReceiver();                    registerReceiver(receiver,new IntentFilter(MyReceiver.ACTION));                }                break;            case R.id.unReg:                if (receiver != null){                    unregisterReceiver(receiver);                    receiver = null;                }                break;        }    }}

Layout code:

Broadcast priority

Static registration in manifest this time

Android: priority: Used to set priority. A larger number indicates a higher priority.

High-priority terminal Broadcast

// Note that sendOrderedBroadcast (intent, null); Intent intent = new Intent (MyReceiver. ACTION); intent. putExtra (data, jiekxueyuan); sendOrderedBroadcast (intent, null );

Receiving part

Public class MyReceiver2 extends BroadcastReceiver {public MyReceiver2 () {}@ Override public void onReceive (Context context, Intent intent) {System. out. println (intent. getStringExtra (data); // This user is used to interrupt the next low-priority acceptance of abortBroadcast ();}}