BroadcastReceiver的两种注册方式（静态注册和动态注册）

静态注册就是在AndroidManifest.xml文件中定义，注册的广播接收器必须继承BroadReceiver

动态注册就是在程序中使用Context.registerReceiver注册。

发送广播事件：通过Context.sendBroadcast来发送，由Intent来传递注册时用到的Action。

接收广播：当发送的广播被接收器监听到后，会调用onReceive()方法，并将包含消息的Intent对象传回。

使用案例：

1、结构图：

2、Sample2-1_Activity.java代码如下：

package com.bn.ex2_1;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.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;public class Sample2_1_Activity extends Activity {private Button sendStaticButton;//发送自定义静态注册广播的按钮private Button sendDynamicButton;//发送自定义动态注册广播的按钮private static final String STATICACTION = "com.bn.pp2.staticreceiver";//静态广播的Action字符串private static final String DYNAMICACTION = "com.bn.pp2.dynamicreceiver";//动态广播的Action字符串@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);sendStaticButton = (Button) findViewById(R.id.send_static);//获取Button按钮引用sendDynamicButton = (Button) findViewById(R.id.send_dynamic);sendStaticButton.setOnClickListener(new DIYOnClickListener());//为Button按钮添加监听器sendDynamicButton.setOnClickListener(new DIYOnClickListener());}class DIYOnClickListener implements OnClickListener{//内部类OnClick监听器public void onClick(View v) {if(v.getId() == R.id.send_static){// 发送自定义静态注册广播消息Intent intent = new Intent();intent.setAction(STATICACTION);//设置Actionintent.putExtra("msg", "接收静态注册广播成功！");//添加附加信息sendBroadcast(intent);//发送Intent}else if(v.getId() == R.id.send_dynamic){// 发送自定义动态注册广播消息Intent intent = new Intent();intent.setAction(DYNAMICACTION);//设置Actionintent.putExtra("msg", "接收动态注册广播成功！");//添加附加信息sendBroadcast(intent);//发送Intent}}}@Overrideprotected void onStart() {super.onStart();IntentFilter dynamic_filter = new IntentFilter();dynamic_filter.addAction(DYNAMICACTION);//添加动态广播的ActionregisterReceiver(dynamicReceiver, dynamic_filter);// 注册自定义动态广播消息}private BroadcastReceiver dynamicReceiver //动态广播的Receiver= new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {if(intent.getAction().equals(DYNAMICACTION)){//动作检测String msg = intent.getStringExtra("msg");Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();}}};}

3、AndroidManifest.xml代码如下：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"      android:versionCode="1"      android:versionName="1.0" package="com.bn.ex2_1">    <application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".Sample2_1_Activity" android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><!-- 注册自定义静态广播接收器 --><receiver android:name=".StaticReceiver"><intent-filter><action android:name="com.bn.pp2.staticreceiver" /></intent-filter></receiver></application></manifest>

4、StaticReceiver.java代码如下：

package com.bn.ex2_1;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;public class StaticReceiver extends BroadcastReceiver {@Override//静态广播接收器执行的方法public void onReceive(Context context, Intent intent) {String msg = intent.getStringExtra("msg");Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();}}

5、main.xml代码如下：

<?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:textSize="24dip"android:gravity="center"android:text="BroadcastReceiver演示" /><Button android:id="@+id/send_static" android:layout_width="wrap_content"android:layout_height="wrap_content" android:text="发送自定义静态注册广播" /><Button android:id="@+id/send_dynamic" android:layout_width="wrap_content"android:layout_height="wrap_content" android:text="发送自定义动态注册广播" /></LinearLayout>

6、运行截图：