另一种黑科技保活方法

            String CHANNEL_ID = "demo_channel";            NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);            NotificationChannel Channel = new NotificationChannel(CHANNEL_ID, getString(R.string.app_name), NotificationManager.IMPORTANCE_HIGH);            Channel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC); //设置锁屏可见 VISIBILITY_PUBLIC=可见            if (manager != null) {                manager.createNotificationChannel(Channel);            }
            Notification notification = new Notification.Builder(this, CHANNEL_ID)                    .setAutoCancel(false)                    .setContentTitle(getString(R.string.app_name))                    .setContentText("运行中...")                    .setWhen(System.currentTimeMillis())                    .setSmallIcon(R.mipmap.ic_launcher_round)                    .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))                    .build();            startForeground(1, notification);

try {
    // 忽略..
    if (nm.getNotificationChannel(localPackageName, appUid,            localForegroundNoti.getChannelId()) == null) {        int targetSdkVersion = Build.VERSION_CODES.O_MR1;        try {            final ApplicationInfo applicationInfo =                    ams.mContext.getPackageManager().getApplicationInfoAsUser(                            appInfo.packageName, 0, userId);            targetSdkVersion = applicationInfo.targetSdkVersion;        } catch (PackageManager.NameNotFoundException e) {        }        if (targetSdkVersion >= Build.VERSION_CODES.O_MR1) {            throw new RuntimeException(                    "invalid channel for service notification: "                            + foregroundNoti);        }    }
    // 忽略..
} catch (RuntimeException e) {    ams.setServiceForeground(name, ServiceRecord.this,            0, null, 0);    ams.crashApplication(appUid, appPid, localPackageName, -1,            "Bad notification for startForeground: " + e);}

void scheduleCrash(String message) {    // Checking killedbyAm should keep it from showing the crash dialog if the process    // was already dead for a good / normal reason.    if (!killedByAm) {        if (thread != null) {            if (pid == Process.myPid()) {                Slog.w(TAG, "scheduleCrash: trying to crash system process!");                return;            }            long ident = Binder.clearCallingIdentity();            try {                thread.scheduleCrash(message);            } catch (RemoteException e) {                // If it's already dead our work is done. If it's wedged just kill it.                // We won't get the crash dialog or the error reporting.                kill("scheduleCrash for '" + message + "' failed", true);            } finally {                Binder.restoreCallingIdentity(ident);            }        }    }}

@Overridepublic void onNotificationError(int callingUid, int callingPid, String pkg, String tag, int id,        int uid, int initialPid, String message, int userId) {    cancelNotification(callingUid, callingPid, pkg, tag, id, 0, 0, false, userId,            REASON_ERROR, null);}

     void scheduleAppCrashLocked(int uid, int initialPid, String packageName, int userId,-            String message) {+            String message, boolean force) {         ProcessRecord proc = null;
         // Figure out which process to kill.  We don't trust that initialPid@@ -374,6 +378,14 @@         }
         proc.scheduleCrash(message);+        if (force) {+            // If the app is responsive, the scheduled crash will happen as expected+            // and then the delayed summary kill will be a no-op.+            final ProcessRecord p = proc;+            mService.mHandler.postDelayed(+                    () -> killAppImmediateLocked(p, "forced", "killed for invalid state"),+                    5000L);+        }     }