blocks|key|611195|text|在这种情况下，我建议您使用Service而不是activity。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|611196|服务在后台运行，如果正确启动，则不受活动生命周期的影响。|611197|需要记住的一件重要事情是，当您返回到UI时，服务必须显式地调用UI线程，否则您将获得ANR错误，因为UI线程不是threadsafe。|611198|请通读该文档，它将帮助您获得更好的解决方案！|611199|希望这能有所帮助|611200|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/app/Service.html^0|D|7|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|6|7|X|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|Y|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|Z|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|10|8|@]|9|@]|C|$]]|$1|L|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|M|$N|$5|O|P|Q|C|$R|S]]]]

<p>I would advise you use a <a href="http://developer.android.com/reference/android/app/Service.html" rel="nofollow">Service</a> rather than an activity in this case.</p>

<p>A service runs in the background and is not affected by the activity lifecycle if it is started correctly.</p>

<p>One important thing to remember is that when you go back to the UI, the service must explicitly call the UI thread, otherwise you will get ANR errors, as the UI thread is not threadsafe.</p>

<p>Please read through that document, it should help you get a better solution for what you're trying to do!</p>

<p>Hope this helped</p>


blocks|key|611294|text|您可以通过以下方式检测您的应用程序是否可见：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|611295|在您的所有Activity中，设置：|offset|length|style|CODE|611296|@Override
protected+void+onResume()+{
++++super.onResume();

++++myVisibilityManager.setIsVisible(true);
}

@Override
protected+void+onPause()+{
++++myVisibilityManager.setIsVisible(false);

++++super.onPause();
}|code-block|syntax|javascript|611297|(这可能会导致您为实现此行为的所有活动定义一个超类)|611298|然后创建一个VisibilityManager+(这是非常基础的，你可能需要更高级的东西)：|611299|public+class+VisibilityManager+{
++++private+boolean+mIsVisible+=+false;

++++public+void+setIsVisible(boolean+visible)+{+
+++++++++mIsVisible+=+visible;+
++++}

++++public+boolean+getIsVisible()+{
+++++++++return+mIsVisible;
++++}
}|611300|然后，在你的计时器线程中，当倒计时到零时：|611301|if+(VisibilityManager.getIsVisible())+{
++++showAlertDialog();
}
else+{
++++showNotification();
}|611302|编辑:但我甚至更喜欢本页面中描述的CommonsWare方法。它更优雅。|611303|entityMap^0|0|5|8|0|0|0|6|H|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@$D|12|E|13|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|14|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|16|8|@$D|17|E|18|F|G]]|9|@]|A|$]]|$1|Q|3|R|5|J|7|19|8|@]|9|@]|A|$K|L]]|$1|S|3|T|5|6|7|1A|8|@]|9|@]|A|$]]|$1|U|3|V|5|J|7|1B|8|@]|9|@]|A|$K|L]]|$1|W|3|X|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|Z|$]]

<p>You can detect whether your app is visible or not the following way:</p>

<p>In all your your <code>Activity</code>, set:</p>

<pre><code>@Override
protected void onResume() {
    super.onResume();

    myVisibilityManager.setIsVisible(true);
}

@Override
protected void onPause() {
    myVisibilityManager.setIsVisible(false);

    super.onPause();
}
</code></pre>

<p>(this may lead you to define a superclass to all your activities that would implement this behaviour)</p>

<p>Then create a <code>VisibilityManager</code> (this one is very basic, you may need something more advanced):</p>

<pre><code>public class VisibilityManager {
    private boolean mIsVisible = false;

    public void setIsVisible(boolean visible) { 
         mIsVisible = visible; 
    }

    public boolean getIsVisible() {
         return mIsVisible;
    }
}
</code></pre>

<p>And then, in your timer thread, when the countdown reached zero:</p>

<pre><code>if (VisibilityManager.getIsVisible()) {
    showAlertDialog();
}
else {
    showNotification();
}
</code></pre>

<p>EDIT: but I even prefer the CommonsWare's approach described here in this page. It is more elegant.</p>


blocks|key|826252|text|以下是解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|826253|​|826254|public+static+boolean+uygulamaCalisiyormu(Context+context)
++++{
++++++++ActivityManager+activityManager+=+(ActivityManager)+context.getSystemService(Context.ACTIVITY_SERVICE);
++++++++List<ActivityManager.RunningAppProcessInfo>+islemler+=+activityManager.getRunningAppProcesses();
++++++++for+(ActivityManager.RunningAppProcessInfo+uygulamaIslemi+:+islemler)
++++++++{
++++++++++++if+(uygulamaIslemi.processName.equals(context.getPackageName()))
++++++++++++{
++++++++++++++++if+(uygulamaIslemi.importance+==+ActivityManager.RunningAppProcessInfo.IMPORTANCE_VISIBLE+%7C%7C+uygulamaIslemi.importance+==+ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND)
++++++++++++++++{
++++++++++++++++++++return+true;
++++++++++++++++}
++++++++++++}
++++++++}
++++++++return+false;
++++}


...
+if+(uygulamaCalisiyormu(getApplicationContext()))
++++++++{
++++++++++++Log.d("asd","App+Already+Started");
++++++++}
++++++else
++++++++{
Log.d("asd","App+Started");
}|code-block|syntax|javascript|826255|826256|编辑:如果你想检查特定的活动(类)，使用这个；|826257|826258|++if+(uygulamaIslemi.processName.equals("com.TRSoft.timetab:PIN"))
++++++++++++{
++++++++++++++++if+(uygulamaIslemi.importance+==+ActivityManager.RunningAppProcessInfo.IMPORTANCE_VISIBLE+%7C%7C+uygulamaIslemi.importance+==+ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND)+//+Lanet+olasıca+şey+Visible+ile+Foreground+arasındaki+fark+ne+oç+illaha+ya+da+yı+kullanarak+olduğunu+keşfetmem+mi+lazım!
++++++++++++++++{
++++++++++++++++++++return+true;
++++++++++++++++}
++++++++++++}|826259|826260|在您的清单文件中：|826261|826262|+<activity+android:name=".PINSayfasi"
++++++++++++android:process=":PIN"></activity>|826263|826264|因此，主要的逻辑是打开和阅读过程。|826265|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|11|8|@]|9|@]|A|$G|H]]|$1|I|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|13|8|@]|9|@]|A|$]]|$1|L|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|M|3|N|5|F|7|15|8|@]|9|@]|A|$G|H]]|$1|O|3|C|5|6|7|16|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|17|8|@]|9|@]|A|$]]|$1|R|3|C|5|6|7|18|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|19|8|@]|9|@]|A|$G|H]]|$1|U|3|C|5|6|7|1A|8|@]|9|@]|A|$]]|$1|V|3|W|5|6|7|1B|8|@]|9|@]|A|$]]|$1|X|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|Y|$]]

<p>Here is the solution: </p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>public static boolean uygulamaCalisiyormu(Context context)
    {
        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        List&lt;ActivityManager.RunningAppProcessInfo&gt; islemler = activityManager.getRunningAppProcesses();
        for (ActivityManager.RunningAppProcessInfo uygulamaIslemi : islemler)
        {
            if (uygulamaIslemi.processName.equals(context.getPackageName()))
            {
                if (uygulamaIslemi.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_VISIBLE || uygulamaIslemi.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND)
                {
                    return true;
                }
            }
        }
        return false;
    }


...
 if (uygulamaCalisiyormu(getApplicationContext()))
        {
            Log.d("asd","App Already Started");
        }
      else
        {
Log.d("asd","App Started");
}</code></pre>
</div>
</div>
</p>

<p>EDIT: If you want to check specific activity (class) use this;</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>  if (uygulamaIslemi.processName.equals("com.TRSoft.timetab:PIN"))
            {
                if (uygulamaIslemi.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_VISIBLE || uygulamaIslemi.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) // Lanet olasıca şey Visible ile Foreground arasındaki fark ne oç illaha ya da yı kullanarak olduğunu keşfetmem mi lazım!
                {
                    return true;
                }
            }</code></pre>
</div>
</div>
</p>

<p>And at your Manifest File:</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code> &lt;activity android:name=".PINSayfasi"
            android:process=":PIN"&gt;&lt;/activity&gt;</code></pre>
</div>
</div>
</p>

<p>So the main logic is opening and reading process. </p>


<p>I have a timer that start a notification when it ends. But I would like to fire a notification using notificationManager only if the app is not currently visible, and to show an alertDialog if the timer ends while the app is in foreground.</p>

<p>I've already tried with this : </p>

<pre><code>ActivityManager actMngr = (ActivityManager) ValeoMobileApplication.getContext().getSystemService(Activity.ACTIVITY_SERVICE);
List&lt;RunningAppProcessInfo&gt; runningAppProcesses = actMngr.getRunningAppProcesses();
Tools.log("TimerBroadcastReceiver", "onReceive", "All running processes are listed below :");
for (RunningAppProcessInfo pi : runningAppProcesses) {
    //Check pi.processName and do your stuff
    //also check pi importance - check if process is in foreground or background
    Tools.log("TimerBroadcastReceiver", "onReceive", pi.processName + " importance = "+pi.importance);
    if(pi.processName.equalsIgnoreCase("MY_APP_PROCESS_NAME")){
        if (pi.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
            isApplicationInForeground = true;
        }
    }
}
</code></pre>

<p>But it seems that it doesn't matter if the app is foreground or not. How can I do this?</p>


How to know if my android app is visible?

我有一个定时器，可以在结束时启动通知。但我只想在应用程序当前不可见的情况下使用notificationManager触发通知，并在应用程序处于前台时计时器结束时显示alertDialog。我已经尝试过了：ActivityManager actMngr = (ActivityManager) ValeoMobileApp...

问如何知道我的android应用程序是否可见？
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