使用AlarmManager和Receiver实现定时自动启动应用程序：

public class Main extends Activity {        public final String MT_ACTION = "android.intent.action.START_MY_APP";         Button bt;    public void onCreate(Bundle savedInstanceState)         super.onCreate(savedInstanceState);        setContentView(R.layout.main);        bt = (Button)findViewById(R.id.bt);        bt.setOnClickListener(new View.OnClickListener() {                        public void onClick(View v) {                                Main.this.finish();                        }                });        AlarmManager am = (AlarmManager)Main.this.getSystemService(Context.ALARM_SERVICE);        Intent intent = new Intent(MT_ACTION);        PendingIntent pi = PendingIntent.getBroadcast(this, 0, intent, 1);        am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+3500, pi);    }}

Manifext：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.vancl.startapp"      android:versionCode="1"      android:versionName="1.0">    <uses-sdk android:minSdkVersion="8" />    <application android:icon="@drawable/icon" android:label="@string/app_name">        <activity android:name=".Main"                  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="AlarmReceiver">                 <intent-filter>                   <action android:name="android.intent.action.START_MY_APP"/>               </intent-filter>          </receiver>     </application></manifest>

Receiver：

package com.vancl.startapp;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;public class AlarmReceiver extends BroadcastReceiver {        public void onReceive(Context context, Intent intent) {                Intent it = new Intent();                it.setClass(context, Main.class);                it.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);                context.startActivity(it);//接受到广播 启动应用        }}