判斷App整體處於前臺還是後臺
阿新 • • 發佈:2019-01-26
轉載請註明轉自:[noyet12的部落格](http://blog.csdn.net/u012975705)
部落格原址:http://blog.csdn.net/u012975705/article/details/50109883
上篇部落格說道,在專案中使用Notification,想要的效果是在app退出前臺工作時拉取後臺資料,發現新動態則在通知欄提示使用者。要達到這個效果,就必須判斷當前app是否處於前臺工作,下面給出判斷方法。
public boolean isAppOnForeground() {
ActivityManager activityManager = (ActivityManager) getApplicationContext().getSystemService(
Context.ACTIVITY_SERVICE);
String packageName =getApplicationContext().getPackageName();
List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
if (appProcesses == null) {
return false;
}
for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) {
if (appProcess.processName.equals(packageName)
&& appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
return true;
}
}
return false;
}
使用方式:
@Override
protected void onStop() {
super.onStop();
if (MainApplication.getInstance().getIsLogin()
&& !MainApplication.getInstance().isAppOnForeground()) {
mTask = new TimerTask() {
@Override
public void run() {
getNews();
}
};
mTimer = new Timer();
mTimer.schedule(mTask, 3 * 1000, 3 * 60 * 1000);
}
}