我有解决办法。
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;
}
效果很好。
我如何检查我的应用程序是否确实在后台运行?例如,我打开活动并启动新的活动 - 标准库(从我的应用程序启动)。这个意图是从我的活动开始的,我的应用程序逻辑上位于前台。我可以检查我的活动,但如何检查这种情况呢?
我如何检查应用程序是否已从外部活动发送到后台(在此示例中 - 画廊)?
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;
}
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