Android 广播接收者练习-发送有序广播

任务内容：

一，发送有序广播对应的布局页面：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_exe"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:background="@drawable/stitch_one"
    tools:context="com.example.administrator.hello.Exe">

    <Button
        android:text="发送有序广播"
        android:textSize="35dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="100dp"
        android:id="@+id/button" />
</RelativeLayout>

二、发送广播，当点击button按钮时，触发点击事件，会发送一条广播。

public class Exe extends AppCompatActivity {
    private Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_exe);
       button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new send());
    }

    private class send implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent("Intercept_Stitch");
            sendOrderedBroadcast(intent,null);
        }
    }
}
三，接受广播，即添加广播接受者。

1.第一个接受者。
public class MyBroadReceiverOne extends BroadcastReceiver {
    public MyBroadReceiverOne() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        Log.d("MyBroadReceiverOne","自定义的广播接受者01，接受到了自定义的广播事件");
    }
}
2.第二个接受者。

public class MyBroadReceiverTwo extends BroadcastReceiver {
    public MyBroadReceiverTwo() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        Log.d("MyBroadReceiverTwo","自定义的广播接受者02，接受到了自定义的广播事件");
    }
}
3.第三个接受者

public class MyBroadReceiverThree extends BroadcastReceiver {
    public MyBroadReceiverThree() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        Log.d("MyBroadReceiverThree","自定义的广播接受者03，接受到了自定义的广播事件");
    }
}

四,三个广播接受者创建后，需要在清单文件中注册并设置他们的优先级。(android:priority属性指定了广播事件的优先级，优先级由高到底依次为：接受者01,接受者03,接受者02，并且要为这三个接受者定义监听的广播事件action为"Intercept_Stitch")

所以当点击发送按钮时，按照优先级，他们的接受并弹出提示的顺序为01，03，02。

Android 广播接收者练习-发送有序广播

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