android Broadcast学习

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其实所谓的静态注册，动态注册，是指接收广播的时候，是静态注册接收还是动态注册接收，发送的时候不分静态，动态

以发送intent为例，

一共分4种情况，以每次注册两个Broadcast为例：

情况一，注册2个静态Broadcast

如果是静态注册的，接收的一定是某一个类继承BroadcastReceiver

2个java文件如下：

BroadcastActivity.java

代码 

package com.broad.test1;

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

//2个静态注册
publicclass BroadcastActivity extends Activity {
/** Called when the activity is first created. */
private Button button01;
private Button button02;
privatestaticfinal String TAG ="BroadcastActivity";
privatestaticfinal String INTENAL_ACTION_1 ="su1.bluetooth.true";
privatestaticfinal String INTENAL_ACTION_2 ="su1.bluetooth.false";

@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button01 = (Button) findViewById(R.id.button01);
button02 = (Button) findViewById(R.id.button02);
button01.setOnClickListener(mybtnListener);
button02.setOnClickListener(mybtnListener);
}

private OnClickListener mybtnListener =new OnClickListener() {

@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub
if (v.getId() == (R.id.button01)) {
Intent intent =new Intent(INTENAL_ACTION_1);
// 也可以用mContext.sendBroadcast(intent),mContext.sendBroadcast可以在构造函数里面初始化，
// 有内部类的时候必须用？？？
sendBroadcast(intent);
} elseif (v.getId() == (R.id.button02)) {
Intent intent =new Intent(INTENAL_ACTION_2);
sendBroadcast(intent);
} else {
Log.v(TAG, "not true not false");
}
}

};

}


BroadcastRecTest.java




代码 

package com.broad.test1;

import android.content.BroadcastReceiver;

import android.content.Context;
import android.content.Intent;
import android.util.Log;
publicclass BroadcastRecTest extends BroadcastReceiver {
privatestaticfinal String TAG="BroadcastActivity";
privatestaticfinal String INTENAL_ACTION_1="su1.bluetooth.true";
privatestaticfinal String INTENAL_ACTION_2="su1.bluetooth.false";
@Override
publicvoid onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if(action.equals(INTENAL_ACTION_1)){
Log.d(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>>>>su1.bluetooth.true");
}elseif(action.equals(INTENAL_ACTION_2)){
Log.d(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>>su1.bluetooth.false");
}else{
Log.d(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>other type intent");
}

}
}



main.xml




代码 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="@string/hello"
/>
<Button
android:id="@+id/button01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="静态接收广播true"/>
<Button
android:id="@+id/button02"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="静态接收广播false"/>
</LinearLayout>



AndroidManifest.xml




代码 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.broad.test1"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".BroadcastActivity"
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="BroadcastRecTest">
<intent-filter>
<action android:name="su1.bluetooth.true"/>
<action android:name="su1.bluetooth.false"/>
</intent-filter>
</receiver>

</application>
<uses-sdk android:minSdkVersion="8"/> 
</manifest>



运行结果：


注意，静态注册的broadcast运行有点慢：


情况2，一个静态，一个动态注册Broadcast


BroadcastActivity.java




代码 

package com.broad.test1;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
import android.util.Log;
//1个动态，1个静态注册
publicclass BroadcastActivity extends Activity {
/** Called when the activity is first created. */
private Button button01;
private Button button02;
privatestaticfinal String TAG="BroadcastActivity";
privatestaticfinal String INTENAL_ACTION_1="su2.bluetooth.true";
privatestaticfinal String INTENAL_ACTION_2="su2.bluetooth.false";
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button01=(Button)findViewById(R.id.button01);
button02=(Button)findViewById(R.id.button02);
button01.setOnClickListener(mybtnListener);
button02.setOnClickListener(mybtnListener);
}
private OnClickListener mybtnListener=new OnClickListener(){

@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub
if(v.getId()==(R.id.button01)){
Intent intent=new Intent(INTENAL_ACTION_1);
sendBroadcast(intent);
}elseif(v.getId()==(R.id.button02)){
Intent intent=new Intent(INTENAL_ACTION_2);
sendBroadcast(intent);
}else{
Log.v(TAG,"not true not false");
}
}

};


// 接收动态注册广播的BroadcastReceiver 
private BroadcastReceiver bcrIntenal2 =new BroadcastReceiver() {
@Override
publicvoid onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
//如果有多个动态注册的广播，要用if(action.equals()){}else if(action.equals()){}来判断是哪个
//String action = intent.getAction();
//这里只有一个，不用判断了。
Log.v(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>>dong--su2.bluetooth.false");
}
};
//在onStart中动态注册广播,当然也可以在onCreate里面注册
@Override
protectedvoid onStart() {
// TODO Auto-generated method stub
super.onStart();
//动态注册
IntentFilter intentFilter=new IntentFilter(INTENAL_ACTION_2);
//也可以用这种方法动态注册多个，说明我可以”接收“这么多的动态广播。
/* IntentFilter intentFilter= new IntentFilter();
intentFilter.addAction("action1");
intentFilter.addAction("action2");*/
registerReceiver(bcrIntenal2,intentFilter);
}

//在onStop中取消注册广播,如果在onCreate里面注册，那么在onDestroy里面取消注册。
@Override
protectedvoid onStop() {
// TODO Auto-generated method stub
super.onStop();
unregisterReceiver(bcrIntenal2);
} 

}



BroadcastRecTest.java





代码 

package com.broad.test1;

import android.content.BroadcastReceiver;

import android.content.Context;
import android.content.Intent;
import android.util.Log;
publicclass BroadcastRecTest extends BroadcastReceiver {
privatestaticfinal String TAG="BroadcastActivity";
privatestaticfinal String INTENAL_ACTION_1="su2.bluetooth.true";
@Override
publicvoid onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
String action = intent.getAction();
if(action.equals(INTENAL_ACTION_1)){
Log.d(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>>>>su.bluetooth.true");
}else{
Log.d(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>other type intent--jingtai");
}

}
}





main.xml




代码 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="@string/hello"
/>
<Button
android:id="@+id/button01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="静态接收广播true"/>
<Button
android:id="@+id/button02"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="动态接收广播false"/>
</LinearLayout>



AndroidManifest.xml




代码 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.broad.test1"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".BroadcastActivity"
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="BroadcastRecTest">
<intent-filter>
<action android:name="su2.bluetooth.true"/>
</intent-filter>
</receiver>

</application>
<uses-sdk android:minSdkVersion="8"/> 
</manifest>





true是静态注册的，在Android.xml中注册的，false是动态注册的，在java代码中注册的


运行结果：




情况三、两个都是动态注册的，在同一个Activity里面既发送，又接收，（当然也可以在不同的java中，一个发送，另一个java接收，哪怕是不同的包）


动态注册不需要一个类继承BroadcastReceiver这个类了，直接new一个对象即可




代码 

package com.broad.test1;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
import android.util.Log;

//两个动态注册
publicclass BroadcastActivity extends Activity {
/** Called when the activity is first created. */
private Button button01;
private Button button02;
privatestaticfinal String TAG="BroadcastActivity";
privatestaticfinal String INTENAL_ACTION_1="su3.bluetooth.true";
privatestaticfinal String INTENAL_ACTION_2="su3.bluetooth.false";
// private static final String BLUETOOTH_PERM = android.Manifest.permission.BLUETOOTH;
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button01=(Button)findViewById(R.id.button01);
button02=(Button)findViewById(R.id.button02);
button01.setOnClickListener(mybtnListener);
button02.setOnClickListener(mybtnListener);
}
private OnClickListener mybtnListener=new OnClickListener(){

@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub
if(v.getId()==(R.id.button01)){
Intent intent=new Intent(INTENAL_ACTION_1);
sendBroadcast(intent);
}elseif(v.getId()==(R.id.button02)){
Intent intent=new Intent(INTENAL_ACTION_2);
sendBroadcast(intent);
}else{
Log.v(TAG,"not true not false");
}
}

};

// 接收动态注册广播的BroadcastReceiver 
private BroadcastReceiver bcrIntenal2 =new BroadcastReceiver() {
@Override
publicvoid onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
//如果有多个动态注册的广播，要用if(action.equals()){}else if(action.equals()){}来判断是哪个
String action = intent.getAction();
if(action.equals(INTENAL_ACTION_1)){
Log.v(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>>dong--su3.bluetooth.true");
}elseif(action.equals(INTENAL_ACTION_2)){
Log.v(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>>dong--su3.bluetooth.false");
}

}
};
//在onStart中动态注册广播,当然也可以在onCreate里面注册
@Override
protectedvoid onStart() {
// TODO Auto-generated method stub
super.onStart();
//动态注册两个，
IntentFilter intentFilter=new IntentFilter();
intentFilter.addAction(INTENAL_ACTION_1);
intentFilter.addAction(INTENAL_ACTION_2);
registerReceiver(bcrIntenal2,intentFilter);
}

//在onStop中取消注册广播,如果在onCreate里面注册，那么在onDestroy里面取消注册。
@Override
protectedvoid onStop() {
// TODO Auto-generated method stub
super.onStop();
unregisterReceiver(bcrIntenal2);
} 

}





main.xml




代码 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="@string/hello"
/>
<Button
android:id="@+id/button01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="动态接收广播true"/>
<Button
android:id="@+id/button02"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="动态接收广播false"/>
</LinearLayout>



AndroidManifest.xml




代码 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.broad.test1"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".BroadcastActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="8"/> 
</manifest>





情况4，sendBroadcast的时候加权限，以2个都动态注册为例




代码 

package com.broad.test1;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
import android.util.Log;

//两个动态注册,sendBroadcast的时候加权限
publicclass BroadcastActivity extends Activity {
/** Called when the activity is first created. */
private Button button01;
private Button button02;
privatestaticfinal String TAG="BroadcastActivity";
privatestaticfinal String INTENAL_ACTION_1="su4.bluetooth.true";
privatestaticfinal String INTENAL_ACTION_2="su4.bluetooth.false";
privatestaticfinal String BLUETOOTH_PERM = android.Manifest.permission.BLUETOOTH;
@Override
publicvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
button01=(Button)findViewById(R.id.button01);
button02=(Button)findViewById(R.id.button02);
button01.setOnClickListener(mybtnListener);
button02.setOnClickListener(mybtnListener);
}
private OnClickListener mybtnListener=new OnClickListener(){

@Override
publicvoid onClick(View v) {
// TODO Auto-generated method stub
if(v.getId()==(R.id.button01)){
Intent intent=new Intent(INTENAL_ACTION_1);
sendBroadcast(intent,BLUETOOTH_PERM);
}elseif(v.getId()==(R.id.button02)){
Intent intent=new Intent(INTENAL_ACTION_2);
sendBroadcast(intent,BLUETOOTH_PERM);
}else{
Log.v(TAG,"not true not false");
}
}

};

// 接收动态注册广播的BroadcastReceiver 
private BroadcastReceiver bcrIntenal2 =new BroadcastReceiver() {
@Override
publicvoid onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
//如果有多个动态注册的广播，要用if(action.equals()){}else if(action.equals()){}来判断是哪个
String action = intent.getAction();
if(action.equals(INTENAL_ACTION_1)){
Log.v(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>>dong--su4.bluetooth.true");
}elseif(action.equals(INTENAL_ACTION_2)){
Log.v(TAG,"surx>>>>>>>>>>>>>>>>>>>>>>>>>>>dong--su4.bluetooth.false");
}

}
};
//在onStart中动态注册广播,当然也可以在onCreate里面注册
@Override
protectedvoid onStart() {
// TODO Auto-generated method stub
super.onStart();
//动态注册两个，说明我可以”接收“2个这样Action的动态广播
IntentFilter intentFilter=new IntentFilter();
intentFilter.addAction(INTENAL_ACTION_1);
intentFilter.addAction(INTENAL_ACTION_2);
registerReceiver(bcrIntenal2,intentFilter);
}

//在onStop中取消注册广播,如果在onCreate里面注册，那么在onDestroy里面取消注册。
@Override
protectedvoid onStop() {
// TODO Auto-generated method stub
super.onStop();
unregisterReceiver(bcrIntenal2);
} 

}





发送的时候加了蓝牙权限，


若在使用sendBroadcast()的方法是指定了接收权限，则只有接收方的包内--在AndroidManifest.xml中用<uses- permission>标签声明了拥有此权限的BroascastReceiver才会有可能接收到发送来的Broadcast。


同样，若在注册BroadcastReceiver时指定了可接收的Broadcast的权限，则只有在接收方的包内的AndroidManifest.xml中 用<uses-permission>标签声明了，拥有此权限的Context对象所发送的Broadcast才能被这个 BroadcastReceiver所接收。




代码 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:text="@string/hello"
/>
<Button
android:id="@+id/button01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="动态接收广播true"/>
<Button
android:id="@+id/button02"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="动态接收广播false"/>
</LinearLayout>



AndroidManifest.xml




代码 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.broad.test1"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".BroadcastActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
<uses-sdk android:minSdkVersion="8"/>
<uses-permission android:name="android.permission.BLUETOOTH"/> 
</manifest>





注意上面加的蓝牙permission权限




两个Application间，发送广播，（以静态为例）


发送端：






package com.sendbroadcast.test1;

import android.app.Activity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
//import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.util.Log;

public class SenderTest1Activity extends Activity {
    /** Called when the activity is first created. */
    private Button btn1;
    private static String TAG = "SenderTest1Activity";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn1 = (Button) findViewById(R.id.btn1);
        btn1.setText("susuSendBroadcast");
        btn1.setOnClickListener(mylistener1);
        Log.v(TAG, "onCreate........");
    }

    OnClickListener mylistener1 = new OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            Log.v(TAG, "@@@@@onclicksendbroadcast");
            if (v.getId() == btn1.getId()) {
                Log.v(TAG, "onclicksendbroadcast");
                Intent myIntent = new Intent();
                myIntent.setAction("su.broadcast.send");
                sendBroadcast(myIntent);
            }

        }

    };
}





接收端：


另一个application


1、Activity




package com.broadcast.receiver.test1;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
public class BroadcastReceiverTest1Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}





2、BroadcastReceiver




package com.broadcast.receiver.test1;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class MyIntentReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context arg0, Intent intent) {
        // TODO Auto-generated method stub
         String action =intent.getAction();
         if(action.equals("su.broadcast.send")){
             Log.v("MyIntentReceiver", "#####shoudao");
            }
    }

}





3、AndroidManifest.xml




<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.broadcast.receiver.test1"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".BroadcastReceiverTest1Activity"
            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=".MyIntentReceiver"
            android:label="wodeReceiver" >
            <intent-filter>
                <action android:name="su.broadcast.send" />
            </intent-filter>
        </receiver>
    </application>

</manifest>



运行Application1，点击button，Application2广播接收端会收到这个广播，打印log信息（但不会显示BroadcastReceiverTest1Activity的界面），还是显示SenderTest1Activity的界面，


Log信息如下：


01-30 05:14:01.146: V/SenderTest1Activity(769): onCreate........
01-30 05:14:01.766: I/ActivityManager(90): Displayed com.sendbroadcast.test1/.SenderTest1Activity: +996ms
01-30 05:14:02.085: W/InputManagerService(90): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@415548b0 (uid=10009 pid=182)
01-30 05:14:02.125: W/NetworkManagementSocketTagger(90): setKernelCountSet(10009, 0) failed with errno -2
01-30 05:14:02.735: V/SenderTest1Activity(769): @@@@@onclicksendbroadcast
01-30 05:14:02.735: V/SenderTest1Activity(769): onclicksendbroadcast
01-30 05:14:02.776: V/MyIntentReceiver(977): #####shoudao









接收端Application3，用动态方式接收。（把Application1的发送的action变成("su.broadcast.send2");）




package com.myreceive.test2;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;

import android.util.Log;
public class BroadcastReceiverTest2Activity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    private BroadcastReceiver br= new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            // TODO Auto-generated method stub
            Log.v("BroadcastReceiverTest2Activity","#####dongtaireceive");
        }
        
    };
    @Override
    protected void onStart() {
        // TODO Auto-generated method stub
        super.onStart();
        IntentFilter it = new IntentFilter();
        it.addAction("su.broadcast.send2");
        registerReceiver(br,it);
        Log.v("BroadcastReceiverTest2Activity","#####registerReceiver");
        
    }

    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onStop();
        unregisterReceiver(br);
        Log.v("BroadcastReceiverTest2Activity","#####unregisterReceiver");
    }
    
}





先运行Application3，不能退出（back），否则就unregisterReceiver了，也就不能收到发送端发送的广播了。再运行Application1，点击button，发送广播，log信息如下：界面还是Application1的界面UI


01-30 07:13:14.918: V/SenderTest1Activity(651): @@@@@onclicksendbroadcast
01-30 07:13:14.918: V/SenderTest1Activity(651): onclicksendbroadcast
01-30 07:13:14.937: V/BroadcastReceiverTest2Activity(591): #####dongtaireceive


对于静态Application2接收广播来说，back之后也能接收到发送端发过来的广播！


注意：发送广播并不能调起另一个Activity！一直显示的都是发送广播的那个Activity的UI！！




总结：


以发送intent为例，发送广播都用sendBroadcast(intent);


静态注册接收的时候，只需要


（1）得到action，如：


String action = intent.getAction();


（2）判断action类型，做出相应的动作。


动态注册接收的时候，需要：


（1） IntentFilter intentFilter= new IntentFilter();


（2）intentFilter.addAction（。。）;可以添加多个


（3）注册接收，registerReceiver(BroadcastReceiver对象,intentFilter);别忘了在其他需要的地方取消注册接收！！！


（4）得到action，如：




String action = intent.getAction();
(5)判断action类型，做出相应的动作。



<Linker : http://www.cnblogs.com/snowdrop/articles/1906709.html>



































































































			

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