Android 如何获取正在运行的应用程序列表？
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How to get the list of running applications?
提问by Jimmy
I am working on an app which needs the information of the apps running at the system up to now. Is there an API/method to retrieve that kind of information?
我正在开发一个应用程序，它需要到目前为止在系统上运行的应用程序的信息。是否有 API/方法来检索此类信息？
回答by desidigitalnomad
You cannotdetect an App launch in Android, but you can get the list of currently open apps and check if the app you're looking for is open or not using the following code:
您无法在 Android 中检测应用程序启动，但您可以使用以下代码获取当前打开的应用程序列表并检查您要查找的应用程序是否已打开：
ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> runningAppProcessInfo = am.getRunningAppProcesses();
for (int i = 0; i < runningAppProcessInfo.size(); i++) {
if(runningAppProcessInfo.get(i).processName.equals("com.the.app.you.are.looking.for")) {
// Do your stuff here.
}
}
You can also check if the app is running in the foreground using this method
您还可以使用此方法检查应用程序是否在前台运行
public static boolean isForeground(Context ctx, String myPackage){
ActivityManager manager = (ActivityManager) ctx.getSystemService(ACTIVITY_SERVICE);
List< ActivityManager.RunningTaskInfo > runningTaskInfo = manager.getRunningTasks(1);
ComponentName componentInfo = runningTaskInfo.get(0).topActivity;
if(componentInfo.getPackageName().equals(myPackage)) {
return true;
}
return false;
}
回答by hsyn tr
public static String getActiveApps(Context context) {
PackageManager pm = context.getPackageManager();
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
String value = u.dateStamp(); // basic date stamp
value += "---------------------------------\n";
value += "Active Apps\n";
value += "=================================\n";
for (ApplicationInfo packageInfo : packages) {
//system apps! get out
if (!isSTOPPED(packageInfo) && !isSYSTEM(packageInfo)) {
value += getApplicationLabel(context, packageInfo.packageName) + "\n" + packageInfo.packageName + "\n-----------------------\n";
}
}
return value;
//result on my emulator
/* 2 Ekim 2017 Pazartesi 14:35:17
---------------------------------
Active Apps
=================================
SystemSetting
com.xyz.systemsetting
-----------------------
myMail
com.my.mail
-----------------------
X-plore
com.lonelycatgames.Xplore
-----------------------
Renotify
com.liamlang.renotify
-----------------------
Mail Box
com.mailbox.email
----------------------- */
}
isSTOPPED
已停止
private static boolean isSTOPPED(ApplicationInfo pkgInfo) {
return ((pkgInfo.flags & ApplicationInfo.FLAG_STOPPED) != 0);
}
isSYSTEM
是系统
private static boolean isSYSTEM(ApplicationInfo pkgInfo) {
return ((pkgInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
}
getApplicationLabel
获取应用程序标签
public static String getApplicationLabel(Context context, String packageName) {
PackageManager packageManager = context.getPackageManager();
List<ApplicationInfo> packages = packageManager.getInstalledApplications(PackageManager.GET_META_DATA);
String label = null;
for (int i = 0; i < packages.size(); i++) {
ApplicationInfo temp = packages.get(i);
if (temp.packageName.equals(packageName))
label = packageManager.getApplicationLabel(temp).toString();
}
return label;
}
回答by David Underhill
You can get information about running processes using the ActivityManagerclass.
您可以使用ActivityManager类获取有关正在运行的进程的信息。
