BroadcastReceiver的两种注册方式（静态注册和动态注册）
通过后台定时发送提示
通过事件来启动服务
//创建对象
Intent intent = new Intent(a.this,MyReceiver.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startService(intent);
通过事件来停止服务
Intent intent = new Intent(a.this,MyReceiver.class);
if(stopService(intent) == true)
{
}
public void onResume()
{
super.onResume();
try{
IntentFilter intentFilter = new IntentFilter(MyReceiver);
MyBroadcastReceiver mReceiver = new MyBroadcastReceiver();
registerReceiver(mReceiver,intentFilter); //注册Receiver
}
catch(Exception e)
{
e.printStackTrace();
}
}
public void onPause()
{
super.onPause();
MyBroadcastReceiver mReceiver = new MyBroadcastReceiver();
unregisterReceiver(mReceiver); //接触注册的Receiver
}
public class MyReceiver extends Service
{
static final String MSG = "message";
public void onStart(Intent intent,int startId)
{
new Thread(){
public void run(){ while(flag){...
Intent intent = new Intent(MSG);
intent.putExtra("msg",MSG)
sendBroadcast(intent);
}}}
}
}
public class MyBroadcastReceiver extends BroadcastReceiver{
public void onReceive(Context context,Intent intent)
{
try
{
Bundle bundle = intent.getExtras();
String msg = bundle.getString("msg");
Toast.makeText(context,""+msg,Toast.LENGTH_SHORT).show();
}
catch(Exception e){e.printStrackTrace();}
}
}
转载自http://www.kankanews.com/ICkengine/archives/7395.shtml
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：
