广播发送和接受者

http://blog.csdn.net/xiazdong/article/details/7768807

广播接收者核心代码

同步广播发送方核心代码：

 

Intent intent = new Intent();
intent.setAction("...");
Context.sendBroadcast(intent);

有序广播发送方核心代码：

Intent intent = new Intent();
intent.setAction("...");
Context.sendOrderedBroadcast(intent,null);

广播接收者核心代码：

 

public class Receiver extends BroadcastReceiver{
    public void onReceive(Context context, Intent intent) {
        Bundle bundle = intent.getExtras();
        ...
    }
}

AndroidManifest.xml

<application>
    <receiver android:name=".Receiver">
        <intent-filter android:priority="1000">
            <action android:name="com.xiazdong"/>
        </intent-filter>
    </receiver>
</application>

三、广播实例

1.同步广播实例

场景说明：

 

(1)广播发送者：

package com.xiazdong.broadcastsender;

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

public class MainActivity extends Activity {
    private Button button;
    private OnClickListener listener = new OnClickListener(){
        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setAction("com.xiazdong");
            intent.putExtra("name", "xiazdong");
            MainActivity.this.sendBroadcast(intent);
            Toast.makeText(getApplicationContext(), "发送广播成功", Toast.LENGTH_SHORT).show();
        }
    };
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        button = (Button)this.findViewById(R.id.button);
        button.setOnClickListener(listener);
    }
}

(2)广播接收者

package com.xiazdong.broadcastreceiver1;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class Receiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String name = intent.getExtras().getString("name");
        Log.i("Recevier1", "接收到:"+name);
    }

}

AndroidManifest.xml

<receiver android:name=".Receiver">
        <intent-filter>
             <action android:name="com.xiazdong"/>
        </intent-filter>
</receiver>

结果：

2.有序广播实例

场景说明：

(1)广播发送者

package com.xiazdong.broadcastsender;

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

public class MainActivity extends Activity {
    private Button button;
    private OnClickListener listener = new OnClickListener(){
        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setAction("com.xiazdong");
            intent.putExtra("name", "xiazdong");
            MainActivity.this.sendOrderedBroadcast(intent, null);   //有序广播发送
            Toast.makeText(getApplicationContext(), "发送广播成功", Toast.LENGTH_SHORT).show();
        }
    };
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        button = (Button)this.findViewById(R.id.button);
        button.setOnClickListener(listener);
    }
}

(2)广播接收者


Receiver1

package com.xiazdong.broadcastreceiver1;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class Receiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String name = intent.getExtras().getString("name");
        Log.i("Recevier1", "接收到:"+name);
        abortBroadcast();   //Receiver1接收到广播后中断广播
    }

}

AndroidManifest.xml

<receiver android:name=".Receiver">
      <intent-filter android:priority="1000"> <!-- 设置最高优先级 -->
         <action android:name="com.xiazdong"/>
      </intent-filter>
 </receiver>