有序广播案例

有序广播是一种同步执行的广播，在广播发出之后，同一时刻只会有一个广播接收器能够接受到这条信息，当这个广播接收器中的逻辑执行完毕后，广播才会继续传递。所以，此时的广播接收器是有先后顺序的，并且可以被拦截。 布局文件：activity_main.xml

<?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_main" 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="cn.edu.bzu.orderedbroadcast.MainActivity"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_marginTop="80dp" android:onClick="send" android:text="发送有序广播" android:paddingLeft="5dp" android:paddingRight="5dp" android:background="#FBFBFF" android:textSize="20sp"/> </RelativeLayout>

用户界面交互代码：MainActivity.Java

package cn.edu.bzu.orderedbroadcast; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void send(View view){ Intent intent=new Intent(); intent.setAction("Intercept_Stitch"); sendOrderedBroadcast(intent,null); } }

广播接收MyBroadcastReceiverOne.java,MyBroadcastReceiverTwo,MyBroadcastReceiverThree

package cn.edu.bzu.orderedbroadcast; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.util.Log; public class MyBroadcastReceiverOne extends BroadcastReceiver { public MyBroadcastReceiverOne() { } @Override public void onReceive(Context context, Intent intent) { Log.i("MyBroadcastReceiverOne","自定义的广播接收者One,接受到了"); } } package cn.edu.bzu.orderedbroadcast; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.util.Log; public class MyBroadcastReceiverTwo extends BroadcastReceiver { public MyBroadcastReceiverTwo() { } @Override public void onReceive(Context context, Intent intent) { Log.i("MyBroadcastReceiverOne","自定义的广播接收者Two,接受到了"); } } package cn.edu.bzu.orderedbroadcast; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.util.Log; public class MyBroadcastReceiverThree extends BroadcastReceiver { public MyBroadcastReceiverThree() { } @Override public void onReceive(Context context, Intent intent) { Log.i("MyBroadcastReceiverOne","自定义的广播接收者Three,接受到了"); } }

清单文件

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="cn.edu.bzu.orderedbroadcast"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <!--注册广播接收者--> <receiver android:name=".MyBroadcastReceiverOne" android:enabled="true" android:exported="true"> <intent-filter android:priority="1000"> <action android:name="Intercept_Stitch"></action> </intent-filter> </receiver> <receiver android:name=".MyBroadcastReceiverTwo" android:enabled="true" android:exported="true"> <intent-filter android:priority="200"> <action android:name="Intercept_Stitch"></action> </intent-filter> </receiver> <receiver android:name=".MyBroadcastReceiverThree" android:enabled="true" android:exported="true"> <intent-filter android:priority="600"> <action android:name="Intercept_Stitch"></action> </intent-filter> </receiver> </application> </manifest>

实现效果 运行效果图：