使用Broadcast实现Android组件间的通信

public class MainActivity extends Activity {

  private Button btn;
  private TextView tv;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    tv = (TextView) this.findViewById(R.id.textView1);

    //接收广播
    LocalBroadcastManager broadcastManager = LocalBroadcastManager
        .getInstance(MainActivity.this);
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction("com.example.test1");
    BroadcastReceiver mItemViewListClickReceiver = new BroadcastReceiver() {
      @Override
      public void onReceive(Context context, Intent intent) {
        tv.setText("1111");
      }
    };
    broadcastManager.registerReceiver(mItemViewListClickReceiver,
        intentFilter);

    btn = (Button) this.findViewById(R.id.button1);
    btn.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {

        //发送广播
        Intent intent = new Intent("com.example.test1");
        LocalBroadcastManager.getInstance(MainActivity.this)
            .sendBroadcast(intent);
      }
    });
  }
}