android关闭应用
16lz
2021-01-23
在开发一个android应用软件时，考虑如何关闭应用程序的问题。一开始采用当前Activity调用finish()来完成，但这种做法是不对的。 这几天通过阅读Android的frameworks层代码时，发现平台提供了关闭程序的方法。 在ActivityManager类中提供了如下的方法：
如下：
/**
* 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.
*
* You must hold the permission * {@link android.Manifest.permission#RESTART_PACKAGES} to be able to
* call this method.
*
* @param packageName The name of the package to be stopped.
*/
public void restartPackage(String packageName) {
try {
ActivityManagerNative.getDefault().restartPackage(packageName);
} catch (RemoteException e) { } }
ok，我们只需要取得ActivityManager的实例，并调用该方法即可正常关闭应用。 以下是关闭程序的代码片段：
private void exit2() {
ActivityManager actMgr = (ActivityManager) this .getSystemService(ACTIVITY_SERVICE);
actMgr.restartPackage(getPackageName()); }
调用上述方法就能彻底地关闭掉程序，一般仅仅调用finish()是无法彻底关闭程序的。 但要注意一点，调用系统服务需要在AndroidManifest.xml文件中增加权限。
如下：
/**
* 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.
*
* You must hold the permission * {@link android.Manifest.permission#RESTART_PACKAGES} to be able to
* call this method.
*
* @param packageName The name of the package to be stopped.
*/
public void restartPackage(String packageName) {
try {
ActivityManagerNative.getDefault().restartPackage(packageName);
} catch (RemoteException e) { } }
ok，我们只需要取得ActivityManager的实例，并调用该方法即可正常关闭应用。 以下是关闭程序的代码片段：
private void exit2() {
ActivityManager actMgr = (ActivityManager) this .getSystemService(ACTIVITY_SERVICE);
actMgr.restartPackage(getPackageName()); }
调用上述方法就能彻底地关闭掉程序，一般仅仅调用finish()是无法彻底关闭程序的。 但要注意一点，调用系统服务需要在AndroidManifest.xml文件中增加权限。
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