安卓中杀进程的方法

上一篇博客刚说到杀进程，会发现有的使用killBackgroundProcesses（）方法是杀不死的。在这样的情况下就需要用到forceStopPackage（）方法强制杀掉进程。各位小伙伴会发现使用mActivityManager.forceStopPackage（）时该方法没有的情况。下面看看 源码：

/**
     * Have the system perform a force stop of everything associated with
     * the given application package.  All processes that share its uid
     * will be killed, all services it has running stopped, all activities
     * removed, etc.  In addition, a {@link Intent#ACTION_PACKAGE_RESTARTED}
     * broadcast will be sent, so that any of its registered alarms can
     * be stopped, notifications removed, etc.
     *
     * <p>You must hold the permission
     * {@link android.Manifest.permission#FORCE_STOP_PACKAGES} to be able to
     * call this method.
     *
     * @param packageName The name of the package to be stopped.
     * @param userId The user for which the running package is to be stopped.
     *
     * @hide This is not available to third party applications due to
     * it allowing them to break other applications by stopping their
     * services, removing their alarms, etc.
     */
    public void forceStopPackageAsUser(String packageName, int userId) {
        try {
            ActivityManagerNative.getDefault().forceStopPackage(packageName, userId);
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    /**
     * @see #forceStopPackageAsUser(String, int)
     * @hide
     */
    public void forceStopPackage(String packageName) {
        forceStopPackageAsUser(packageName, UserHandle.myUserId());
    }

这里有一个@hide的标签，因为谷歌觉得这样太不安全了，所以没法正常调用此方法，那么怎么办呢？我们第一时间就应该想到了用反射获取到此方法，然后进行调用。（注意此方法一定是系统级别签名的应用才能够调用此方法）

ActivityManager mActivityManager = (ActivityManager) getActivity().getSystemService(Context.ACTIVITY_SERVICE);
        Method method = null;
        try {
            method = Class.forName("android.app.ActivityManager").getMethod("forceStopPackage", String.class);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        try {
            method.invoke(mActivityManager, packageName);  //packageName是需要强制停止的应用程序包名
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

如果不知道怎么获取应用包名的小伙伴，请看我上一篇博客：http://blog.csdn.net/qq77485042/article/details/76241102

下篇博客我将分享怎么把自己的应用push到system/app中，并且把自己的应用设置成系统级别的应用。
如有遗漏或错误，欢迎留言探讨。