BroadcastReceiver的兩種註冊方式（靜態註冊和動態註冊）

靜態註冊就是在AndroidManifest.xml文件中定義，註冊的廣播接收器必須繼承BroadReceiver

動態註冊就是在程序中使用Context.registerReceiver註冊。

發送廣播事件：經過Context.sendBroadcast來發送，由Intent來傳遞註冊時用到的Action。

接收廣播：當發送的廣播被接收器監聽到後，會調用onReceive()方法，並將包含消息的Intent對象傳回。

使用案例：

一、結構圖：

 

二、Sample2-1_Activity.java代碼以下：

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;	//發送自定義靜態註冊廣播的按鈕
	private Button sendDynamicButton;	//發送自定義動態註冊廣播的按鈕
	private static final String STATICACTION = "com.bn.pp2.staticreceiver";	//靜態廣播的Action字符串
	private static final String DYNAMICACTION = "com.bn.pp2.dynamicreceiver";	//動態廣播的Action字符串
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		sendStaticButton = (Button) findViewById(R.id.send_static);		//獲取Button按鈕引用
		sendDynamicButton = (Button) findViewById(R.id.send_dynamic);
		sendStaticButton.setOnClickListener(new DIYOnClickListener());	//爲Button按鈕添加監聽器
		sendDynamicButton.setOnClickListener(new DIYOnClickListener());
	}
	class DIYOnClickListener implements OnClickListener{		//內部類OnClick監聽器
		public void onClick(View v) {
			if(v.getId() == R.id.send_static){		// 發送自定義靜態註冊廣播消息
				Intent intent = new Intent();
				intent.setAction(STATICACTION);		//設置Action
				intent.putExtra("msg", "接收靜態註冊廣播成功！");	//添加附加信息
				sendBroadcast(intent);				//發送Intent
			}
			else if(v.getId() == R.id.send_dynamic){	// 發送自定義動態註冊廣播消息
				Intent intent = new Intent();
				intent.setAction(DYNAMICACTION);		//設置Action
				intent.putExtra("msg", "接收動態註冊廣播成功！");		//添加附加信息
				sendBroadcast(intent);					//發送Intent
	}}}
	@Override
	protected void onStart() {
		super.onStart();
		IntentFilter dynamic_filter = new IntentFilter();
		dynamic_filter.addAction(DYNAMICACTION);			//添加動態廣播的Action
		registerReceiver(dynamicReceiver, dynamic_filter);	// 註冊自定義動態廣播消息
	}
	
	private BroadcastReceiver dynamicReceiver 				//動態廣播的Receiver
	= new BroadcastReceiver() {
		@Override
		public void onReceive(Context context, Intent intent) {
			if(intent.getAction().equals(DYNAMICACTION)){	//動做檢測
				String msg = intent.getStringExtra("msg");
				Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
}}};}

 

三、AndroidManifest.xml代碼以下：

<?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>
		<!-- 註冊自定義靜態廣播接收器 -->
		<receiver android:name=".StaticReceiver">
			<intent-filter>
				<action android:name="com.bn.pp2.staticreceiver" />
			</intent-filter>
		</receiver>
	</application>
</manifest>

 

四、StaticReceiver.java代碼以下：

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		//靜態廣播接收器執行的方法
	public void onReceive(Context context, Intent intent) {
		String msg = intent.getStringExtra("msg");
		Toast.makeText(context, msg, Toast.LENGTH_SHORT).show();
}}

 

五、main.xml代碼以下：

<?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="發送自定義靜態註冊廣播" />
	<Button 
		android:id="@+id/send_dynamic" 
		android:layout_width="wrap_content"
		android:layout_height="wrap_content" 
		android:text="發送自定義動態註冊廣播" />
</LinearLayout>

六、運行截圖：