当应用在前台运行时，在警告框中显示推送通知
当应用在前台运行时，在警告框中显示推送通知
提问于 2013-03-22 23:25:15
我在我的android应用程序中执行GCM触发的推送通知。如果应用程序正在警告框中运行，我想显示通知。如果应用程序不在运行意味着不在前台仅显示状态栏通知，如何确定应用程序是否正在运行以及是否在前台?是否可以显示通知，如this.now正在使用此代码显示状态栏推送通知
NotificationManager notificationManager = (NotificationManager)
context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notification(icon, message, when);
String title = context.getString(R.string.app_name);
Intent notificationIntent = new Intent(context, BottomActivity.class);
// set intent so it does not start a new activity
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent intent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, title, message, intent);
notification.flags |= Notification.FLAG_AUTO_CANCEL;
// Play default notification sound
notification.defaults |= Notification.DEFAULT_SOUND;
//notification.sound = Uri.parse("android.resource://" + context.getPackageName() + "your_sound_file_name.mp3");
// Vibrate if vibrate is enabled
notification.defaults |= Notification.DEFAULT_VIBRATE;
notificationManager.notify(0, notification); 回答 3
Stack Overflow用户
发布于 2014-04-25 02:21:33
您可以创建一个新的活动和主题作为对话，并检查前台活动。检查下面的代码。
ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningTaskInfo> services = activityManager
.getRunningTasks(Integer.MAX_VALUE);
boolean isActivityFound = false;
if (services.get(0).topActivity.getPackageName().toString()
.equalsIgnoreCase(context.getPackageName().toString())) {
isActivityFound = true;
}
if (isActivityFound) {
resultIntent = new Intent(context, AlertDialogNotification.class);
resultIntent.putExtra(EXTRA_ALERT_MESSAGE_BEAUTIFUL, "anyMessage");
resultIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(resultIntent);
}在清单中，将活动的主题设置为Dialog。希望能有所帮助。如果你有问题，请告诉我们。
Stack Overflow用户
发布于 2013-03-23 00:26:34
你有多少个活动？如果只有一个，那么在onResume()和onPause() (当它处于活动状态时)之间保持一个对它的单例引用是非常容易的，如果它是活动的话，并从接收器调用它。如果你有很多活动，你可以通过为它们提供一个公共的基类来实现类似的逻辑。如下所示：
class MyActivity: Activity
{
static private MyActivity _Current = null;
protected void onResume() //Activated
{
super.onResume();
_Current = this;
}
protected void onPause() //Deactivated
{
super.onPause();
_Current = null;
}
//This is for the receiver to call
static public PopAlert()
{
if(_Current != null)
{
new AlertDialog.Builder(_Current)
.setMessage("Hello world")
//More alert setup; use _Current as a context object
.create().show();
}
}
}Stack Overflow用户
发布于 2017-04-12 14:58:34
请试试这些
public static boolean isAppIsInBackground(Context context) {
boolean isInBackground = true;
ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
for (String activeProcess : processInfo.pkgList) {
if (activeProcess.equals(context.getPackageName()))
isInBackground = false;
}
}
}
} else {
List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
ComponentName componentInfo = taskInfo.get(0).topActivity;
if (componentInfo.getPackageName().equals(context.getPackageName())) {
isInBackground = false;
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/15574014
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