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
@Override
public 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Action
intent.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Action
intent.putExtra("msg", "接收动态注册广播成功！");//添加附加信息
sendBroadcast(intent);//发送Intent
}}}
@Override
protected void onStart() {
super.onStart();
IntentFilter dynamic_filter = new IntentFilter();
dynamic_filter.addAction(DYNAMICACTION);//添加动态广播的Action
registerReceiver(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() {
@Override
public 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：
