[英]How can I check if an app running on Android?
我是一名 Android 開發人員,我想在我的應用程序中編寫一個if
語句。 在此聲明中,我想檢查默認瀏覽器(Android 操作系統中的瀏覽器)是否正在運行。 我如何以編程方式執行此操作?
添加以下 Helper 類:
public class Helper {
public static boolean isAppRunning(final Context context, final String packageName) {
final ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
final List<ActivityManager.RunningAppProcessInfo> procInfos = activityManager.getRunningAppProcesses();
if (procInfos != null)
{
for (final ActivityManager.RunningAppProcessInfo processInfo : procInfos) {
if (processInfo.processName.equals(packageName)) {
return true;
}
}
}
return false;
}
}
現在你可以通過下面的代碼檢查你想要的應用程序是否正在運行:
if (Helper.isAppRunning(YourActivity.this, "com.your.desired.app")) {
// App is running
} else {
// App is not running
}
isInBackground
是應用程序的狀態
ActivityManager.RunningAppProcessInfo myProcess = new ActivityManager.RunningAppProcessInfo();
ActivityManager.getMyMemoryState(myProcess);
Boolean isInBackground = myProcess.importance != ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND;
您可以通過以下方法查看
public static boolean isRunning(Context ctx) {
ActivityManager activityManager = (ActivityManager) ctx.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> tasks = activityManager.getRunningTasks(Integer.MAX_VALUE);
for (ActivityManager.RunningTaskInfo task : tasks) {
if (ctx.getPackageName().equalsIgnoreCase(task.baseActivity.getPackageName()))
return true;
}
return false;
}
最佳解決方案是:
創建一個這樣的界面。
interface LifeCycleDelegate {
void onAppBackgrounded();
void onAppForegrounded();
}
現在添加一個處理所有活動生命周期回調的類。
public class AppLifecycleHandler implements
Application.ActivityLifecycleCallbacks, ComponentCallbacks2 {
LifeCycleDelegate lifeCycleDelegate;
boolean appInForeground = false;
public AppLifecycleHandler(LifeCycleDelegate lifeCycleDelegate) {
this.lifeCycleDelegate = lifeCycleDelegate;
}
@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
}
@Override
public void onActivityStarted(Activity activity) {
}
@Override
public void onActivityResumed(Activity activity) {
if (!appInForeground) {
appInForeground = true;
lifeCycleDelegate.onAppForegrounded();
}
}
@Override
public void onActivityPaused(Activity activity) {
}
@Override
public void onActivityStopped(Activity activity) {
}
@Override
public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
}
@Override
public void onActivityDestroyed(Activity activity) {
}
@Override
public void onTrimMemory(int level) {
if (level == ComponentCallbacks2.TRIM_MEMORY_UI_HIDDEN) {
// lifecycleDelegate instance was passed in on the constructor
appInForeground = false;
lifeCycleDelegate.onAppBackgrounded();
}
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
}
@Override
public void onLowMemory() {
}
}
現在在擴展應用程序的類中
public class MyApplication extends Application implements
LifeCycleDelegate{
@Override
public void onCreate() {
super.onCreate();
AppLifecycleHandler lifeCycleHandler = new
AppLifecycleHandler(MyApplication.this);
registerLifecycleHandler(lifeCycleHandler);
}
@Override
public void onAppBackgrounded() {
Log.d("Awww", "App in background");
}
@Override
public void onAppForegrounded() {
Log.d("Yeeey", "App in foreground");
}
private void registerLifecycleHandler(AppLifecycleHandler lifeCycleHandler) {
registerActivityLifecycleCallbacks(lifeCycleHandler);
registerComponentCallbacks(lifeCycleHandler);
}
}
有關更多信息,請參閱: https ://android.jlelse.eu/how-to-detect-android-application-open-and-close-background-and-foreground-events-1b4713784b57
fun Context.isAppInForeground(): Boolean {
val application = this.applicationContext
val activityManager = this.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
val runningProcessList = activityManager.runningAppProcesses
if (runningProcessList != null) {
val myApp = runningProcessList.find { it.processName == application.packageName }
ActivityManager.getMyMemoryState(myApp)
return myApp?.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND
}
return false
}
如果你正在使用 Kotlin
private fun isAppRunning(context: Context, packageName: String): Boolean {
val activityManager = context.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
activityManager.runningAppProcesses?.apply {
for (processInfo in this) {
if (processInfo.processName == packageName) {
return true
}
}
}
return false
}
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