BroadcastReceiver简单实例

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MainActivity  广播发起者

package pic.zx.testbroadcastreceiver;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {

	private Button btn_intent;
	private static TextView text_show;
	private Intent intent;
	final String INTENT_ACTION = "pic.zx.action.service";
	final String INTENT_ACTION2 = "pic.zx.action.service2";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }
    private void initView(){
    	btn_intent = (Button)findViewById(R.id.btn_intent);
    	text_show = (TextView)findViewById(R.id.text_show);
    	btn_intent.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				new AlertDialog.Builder(MainActivity.this)
					.setTitle("Make a choose")
					.setPositiveButton("无序广播", new DialogInterface.OnClickListener() {
						@Override
						public void onClick(DialogInterface dialog, int which) {
							// TODO Auto-generated method stub
							intent = new Intent();
					        intent.putExtra("extra", "im a test from the MainActivity");
					        intent.putExtra("if", "no");
					        intent.setAction(INTENT_ACTION2);
							sendBroadcast(intent);
						}
					})
					.setNegativeButton("有序广播", new DialogInterface.OnClickListener() {
						
						@Override
						public void onClick(DialogInterface dialog, int which) {
							// TODO Auto-generated method stub
							intent = new Intent();
					        intent.putExtra("extra", "im a test from the MainActivity");
					        intent.putExtra("if", "yes");
					        intent.setAction(INTENT_ACTION);
					        sendOrderedBroadcast(intent, null);
						}
					}).create().show();
			}
		});
    }
    public static class handler_tell extends Handler{
    	@Override
    	public void handleMessage(Message msg) {
    		if(msg.what == 20201){
    			text_show.setText("第一次已接收");
    		}
    		if(msg.what == 20){
    			text_show.append("     已发送!!");
    		}
    		if(msg.what == 202){
    			text_show.append("     已接收!!");
    		}
    		super.handleMessage(msg);
    	}
    }
}

SecondActivity   无序广播的接受者   有序广播的优先接受者(优先级为20)

package pic.zx.testbroadcastreceiver;

import pic.zx.testbroadcastreceiver.MainActivity.handler_tell;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Toast;

public class SecondActivity extends BroadcastReceiver{
	handler_tell h = new handler_tell();
	@Override
	public void onReceive(Context context, Intent intent) {
		// TODO Auto-generated method stub
		h.sendEmptyMessage(20201);
		Bundle bundle = new Bundle();
		bundle.putString("extra2", "im a text from SecondActivityBroadcastReceiver");
		if(intent.getExtras().getString("if").contains("yes")){
			//讲bundle放入结果中
			setResultExtras(bundle);
			//取消广播
//			abortBroadcast(); 
			h.sendEmptyMessage(20);
		}
		else 
			Toast.makeText(context, intent.getExtras().getString("extra"), 0).show();
	}
}

ThirdActivity   有序广播的最终接受者(优先级为0)

package pic.zx.testbroadcastreceiver;

import pic.zx.testbroadcastreceiver.MainActivity.handler_tell;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Toast;

public class ThirdActivity extends BroadcastReceiver{

	handler_tell j = new handler_tell();
	@Override
	public void onReceive(Context context, Intent intent) {
		j.sendEmptyMessage(202);

<span style="white-space:pre">		</span>//出问题的地方 获取整个Extras
		Bundle bundle = intent.getExtras();
		//获取前一个BroadcastReceiver所存入的extras
		Bundle bundle2 = getResultExtras(true);
		Toast.makeText(context, "初始信息为: "+bundle.getString("extra")+
				"\n后添加的为: "+ bundle2.getString("extra2"), 1).show();
	}

}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="pic.zx.testbroadcastreceiver"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="pic.zx.testbroadcastreceiver.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name="pic.zx.testbroadcastreceiver.SecondActivity">
            <intent-filter android:priority="20">
                <action android:name="pic.zx.action.service"/>
                 <action android:name="pic.zx.action.service2"/>
            </intent-filter>
        </receiver>
        <receiver android:name="pic.zx.testbroadcastreceiver.ThirdActivity">
            <intent-filter android:priority="0">
                <action android:name="pic.zx.action.service"/>
            </intent-filter>
        </receiver>
    </application>

</manifest>