避免在设置中强制停止某一应用

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音乐播放过程中，在设置-》应用中，对音乐执行强制停止，相关日志如下：

framework层相关代码alps\frameworks\base\services\core\java\com\android\server\am\ActivityManagerService.java中对应用停止运行执行的代码如下：

    @Override    public void forceStopPackage(final String packageName, int userId) {        if (checkCallingPermission(android.Manifest.permission.FORCE_STOP_PACKAGES)                != PackageManager.PERMISSION_GRANTED) {            String msg = "Permission Denial: forceStopPackage() from pid="                    + Binder.getCallingPid()                    + ", uid=" + Binder.getCallingUid()                    + " requires " + android.Manifest.permission.FORCE_STOP_PACKAGES;            Slog.w(TAG, msg);            throw new SecurityException(msg);        }        final int callingPid = Binder.getCallingPid();        userId = mUserController.handleIncomingUser(callingPid, Binder.getCallingUid(),                userId, true, ALLOW_FULL_ONLY, "forceStopPackage", null);        long callingId = Binder.clearCallingIdentity();        try {            IPackageManager pm = AppGlobals.getPackageManager();            synchronized(this) {                int[] users = userId == UserHandle.USER_ALL                        ? mUserController.getUsers() : new int[] { userId };                for (int user : users) {                    int pkgUid = -1;                    try {                        pkgUid = pm.getPackageUid(packageName, MATCH_DEBUG_TRIAGED_MISSING,                                user);                    } catch (RemoteException e) {                    }                    if (pkgUid == -1) {                        Slog.w(TAG, "Invalid packageName: " + packageName);                        continue;                    }                    try {                        pm.setPackageStoppedState(packageName, true, user);                    } catch (RemoteException e) {                    } catch (IllegalArgumentException e) {                        Slog.w(TAG, "Failed trying to unstop package "                                + packageName + ": " + e);                    }                    /// M: [process suppression] @{                    if ("1".equals(SystemProperties.get("persist.runningbooster.support")) ||                            "1".equals(SystemProperties.get("ro.mtk_aws_support"))) {                        AMEventHookData.PackageStoppedStatusChanged eventData =                                AMEventHookData.PackageStoppedStatusChanged.createInstance();                        eventData.set(packageName, SUPPRESS_ACTION_STOP, "forceStopPackage");                        mAMEventHook.hook(AMEventHook.Event.AM_PackageStoppedStatusChanged,                                eventData);                    }                    /// M: [process suppression] @}                    if (mUserController.isUserRunningLocked(user, 0)) {                        forceStopPackageLocked(packageName, pkgUid, "from pid " + callingPid);                        finishForceStopPackageLocked(packageName, pkgUid);                    }                }            }        } finally {            Binder.restoreCallingIdentity(callingId);        }    }

在设置中对音乐点击强制停止，如果想让音乐继续后台播放，可以在ActivityManagerService.java中对代码进行控制，判断packageName是否为音乐，如果是音乐，直接返回即可。到时产生的效果是，点击强制停止，会没有响应，达到了想要的效果。

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