Android开发之发送有序广播+拦截广播

看这篇之前，先看一下我的上一遍博客，这些代码都是  第一行代码 里面的

新建一个BroadcastTest2项目

新建AndroidBroadcastReceiver 继承BroadcastReceiver

package com.example.broadcastreceiver;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class AnotherBroadcastReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        Toast.makeText(context, "receiver in AndoidBroadcastReceiver", Toast.LENGTH_SHORT).show();
    }

    
}

然后在AndroidManifest.xml对这个广播接收器进行注册

 <receiver android:name=".AnotherBroadcastReceiver">
            <intent-filter >
                <action android:name="com.example.broadcasttest.MY_BROADCAST"/>
            </intent-filter>
        </receiver>

现在运行这个项目，在运行上一遍提到的项目，就会发现应用程序发出的广播会被其他应用程序接收到

接下来，开始，进行广播拦截

关了BroadcastTest2项目

修改上一篇中的BroadcastTest项目

package com.example.mybroadcastreceiver;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button=(Button)findViewById(R.id.button);
        button.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Intent intent=new Intent("com.example.broadcasttest.MY_BROADCAST");
                //sendBroadcast(intent);

                sendOrderedBroadcast(intent,null);

            }
            
        });
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}

在AndroidManifest.xml修改优先级

<receiver android:name=".MyBroadcastReceiver">
            <intent-filter android:priority="100">
                <action android:name="com.example.broadcasttest.MY_BROADCAST"/>
            </intent-filter>
        </receiver>

最后修改MyBroadcastReceiver.java

package com.example.mybroadcastreceiver;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;

public class MyBroadcastReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        Toast.makeText(context, "received is MyBroadcastReceiver", Toast.LENGTH_SHORT).show();
        abortBroadcast();
    }

    
}

现在广播传到BroadcastTest 就拦截了，BroadcastTest2  就不在收到广播了。