使用Broadcast實現android組件之間的通訊

android組件之間的通訊有多種實現方式，Broadcast就是其中一種。在activity和fragment之間的通訊，broadcast用的更多本文以一個activity爲例。
效果如圖：

佈局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" >

    <TextView  android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" />

    <Button  android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layout_marginLeft="27dp" android:layout_marginTop="26dp" android:text="發送廣播" />

</LinearLayout>

MainActivity.java

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);

        //接收廣播
        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) {

                //發送廣播
                Intent intent = new Intent("com.example.test1");
                LocalBroadcastManager.getInstance(MainActivity.this)
                        .sendBroadcast(intent);
            }
        });
    }
}