import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class BootBroadcastReceiver extends BroadcastReceiver {
  //重写onReceive方法
  @Override
  public void onReceive(Context context, Intent intent) {
  //后边的XXX.class就是要启动的服务
  Intent service = new Intent(context,XXXclass);
  context.startService(service);
  Log.v("TAG", "开机自动服务自动启动.....");
  //启动应用，参数为需要自动启动的应用的包名
  Intent intent = getPackageManager().getLaunchIntentForPackage(packageName);
  context.startActivity(intent );
  }
}

<receiver android:name="BootBroadcastReceiver">
  <intent-filter>
   <action android:name="android.intent.action.BOOT_COMPLETED"></action>
   <category android:name="android.intent.category.LAUNCHER" />
  </intent-filter>
</receiver>