有序广播

最新推荐文章于 2025-02-06 23:25:17 发布

原创最新推荐文章于 2025-02-06 23:25:17 发布 · 375 阅读

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本文介绍了一个简单的Android有序广播实现案例，包括用户界面设计、广播发送、接收器创建及注册过程。通过不同优先级的接收器展示了有序广播的传递机制。

一·编写用户交互界面

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffffff"
    tools:context=".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>

二点击发送有序广播按钮时事件处理

package com.example.bz0209.myapplication;

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);
    }
}
三  创建广播接收者MyBroadcastReceiverOne，MyBroadcastReceiverTwo ,MyBroadcastReceiverThree
1.
public class MyBroadcastReceiverOne extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent){
        Log.i("MyBroadcastReceiverOne","自定义的广播接受者One，接受到了广播事件");
    }

}
2.
public class MyBroadcastReceiverTwo extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent){
        Log.i("MyBroadcastReceiverTwo","自定义的广播接受者Two，接受到了广播事件");
    }

}
3.


public class MyBroadcastReceiverThree extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent){
        Log.i("MyBroadcastReceiverThree","自定义的广播接受者Three，接受到了广播事件");
    }

}












四 注册广播接收者
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.bz0209.myapplication">

    <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>
        <receiver android:name=".MyBroadcastReceiverOne">
            <intent-filter android:priority="1000">
                <action android:name="Intercept_Stitch"/>
            </intent-filter>
        </receiver>
        <receiver android:name=".MyBroadcastReceiverTwo">
            <intent-filter android:priority="200">
                <action android:name="Intercept_Stitch"/>
            </intent-filter>
        </receiver>
    <receiver android:name=".MyBroadcastReceiverThree">
        <intent-filter android:priority="600">
            <action android:name="Intercept_Stitch"/>
        </intent-filter>
    </receiver>
    </application>

</manifest>

五  结果运行图