Android组件之间的通信有多种实现方式，Broadcast就是其中一种。在activity和fragment之间的通信，broadcast用的更多本文以一个activity为例。
效果如图：
布局文件：
<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="发送广播" />
</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);
}
});
}
}