我有解决方案。
public static boolean isApplicationSentToBackground(final Context context) {
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningTaskInfo> tasks = am.getRunningTasks(1);
if (!tasks.isEmpty()) {
ComponentName topActivity = tasks.get(0).topActivity;
if (!topActivity.getPackageName().equals(context.getPackageName())) {
return true;
}
}
return false;
}
工作正常。
如何检查我的应用程序是否真的在后台?例如,我打开了活动并启动了新的Activity - 标准图库(从我的应用程序启动)。这个意图是从我的活动开始的,我的应用程序在逻辑上处于前台。我可以查看我的活动,但是如何检查这种情况呢?
如何检查应用程序是否已发送到后台FROM外部活动(在此示例 - 库中)?
答案 0 :(得分:1)
public boolean isApplicationSentToBackground(final Context context) {
Boolean flag = false;
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
if (Build.VERSION.SDK_INT >= 23) {
List < ActivityManager.RunningTaskInfo > tasks = am.getRunningTasks(1);
if (!tasks.isEmpty()) {
ComponentName topActivity = tasks.get(0).topActivity;
if (!topActivity.getPackageName().equals(context.getPackageName())) {
flag = true;
}
}
} else {
try {
Thread.sleep(1500);
flag = false;
List < ActivityManager.RunningAppProcessInfo > runningProcesses = am.getRunningAppProcesses();
for (ActivityManager.RunningAppProcessInfo processInfo: runningProcesses) {
if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {
for (String activeProcess: processInfo.pkgList) {
if (activeProcess.equals(context.getPackageName())) {
flag = true;
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
return flag;
}