方案一
将app做成系统应用，直接安装在 system/app 目录下
具体步骤为：
1.在AndroidManifest文件中，添加
android:sharedUserId="android.uid.system"
image.png
2.将您的apk直接通过adb命令push到system/app下面，重启手机即可
方案二
1.创建一个广播接收者
package itbird.com.myapplication33;
import android.app.ActivityManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import java.util.List;
/**
* Created by xfkang on 2018/5/7.
*/
public class MyReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
if (intent == null) {
return;
}
Log.d("MyReceiver", intent.getAction());
if (!isRun(context, "itbird.com.myapplication33")) {
intent.setClass(context, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
}
/**
* 判断应用是否在运行
*
* @param context
* @return
*/
public boolean isRun(Context context, String packagename) {
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> list = am.getRunningTasks(100);
boolean isAppRunning = false;
//100表示取的最大的任务数，info.topActivity表示当前正在运行的Activity，info.baseActivity表系统后台有此进程在运行
for (ActivityManager.RunningTaskInfo info : list) {
if (info.topActivity.getPackageName().equals(packagename) || info.baseActivity.getPackageName().equals(packagename)) {
isAppRunning = true;
Log.d("ActivityService isRun()", info.topActivity.getPackageName() + " info.baseActivity.getPackageName()=" + info.baseActivity.getPackageName());
break;
}
}
Log.d("ActivityService isRun()", "com.ad 程序 ...isAppRunning......" + isAppRunning);
return isAppRunning;
}
}
2.给receiver配置对应intent-filter
<receiver android:name=".MyReceiver">
<intent-filter>
<action android:name="ITBIRD.TEST.ACTION"/>
</intent-filter>
</receiver>
3.添加权限，缺少这步则无法在Android 3.0及其之前版本上自启动
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
注意
1.由于Android系统在外置SD卡加载前广播ACTION_BOOT_COMPLETED，于是如果应用安装在外置SD卡上，它无法接收到此广播
2.FLAG_INCLUDE_STOPPED_PACKAGES的问题，请阅读《Android应用在未启动的情况下接受指定广播》
