[Android新手学习笔记31]-Broadcast-本地广播

使用本地广播，只能在本程序中发送和接收，安全。属于自定义广播。

  
  

public class MainActivity extends AppCompatActivity {
   
   

   
   
    private IntentFilter intentFilter;
   
   

   
   
    private LocalReceiver localReceiver;
   
   

   
   
    private LocalBroadcastManager localBroadcastManager;
   
   

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

   
   
        localBroadcastManager = LocalBroadcastManager.getInstance(this); // 获取实例
   
   

   
   
        Button button = (Button) findViewById(R.id.button);
   
   
        button.setOnClickListener(new View.OnClickListener() {
   
   
            @Override
   
   
            public void onClick(View v) {
   
   
                Intent intent = new Intent("top.xiexiaodong.broadcast.LOCAL_BROADCAST");
   
   
                localBroadcastManager.sendBroadcast(intent); // 发送本地广播
   
   
            }
   
   
        });
   
   

   
   
        intentFilter = new IntentFilter();
   
   
        intentFilter.addAction("top.xiexiaodong.broadcast.LOCAL_BROADCAST");
   
   
        localReceiver = new LocalReceiver();
   
   
        localBroadcastManager.registerReceiver(localReceiver, intentFilter); // 注册本地广播监听器
   
   
    }
   
   

   
   
    @Override
   
   
    protected void onDestroy() {
   
   
        super.onDestroy();
   
   
        localBroadcastManager.unregisterReceiver(localReceiver); // 一定要取消注册
   
   
    }
   
   

   
   
    class LocalReceiver extends BroadcastReceiver {
   
   
        @Override
   
   
        public void onReceive(Context context, Intent intent) {
   
   
            Toast.makeText(context, "我是本地广播", Toast.LENGTH_SHORT).show();
   
   
        }
   
   
    }
   
   
}