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android 判断当前application 是在前台还是在后台

** *判断当前应用程序处于前台还是后台 * * @param context * @return * public static boolean isApplicationBroughtToBackground(final Context context) { Activity ...

/**
     *判断当前应用程序处于前台还是后台
     * 
     * @param context
 
     * @return    
 
     */
    public static boolean isApplicationBroughtToBackground(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;
 
    }
 
上面这段代码是需要一个权限的:
 
 <uses-permission android:name="android.permission.GET_TASKS" />
 
 
下面这段代码是我最新发现,无需权限,妥妥滴:
 
/**
* @param context
* @return
*/
public static boolean isBackground(Context context) {
 
 
ActivityManager activityManager = (ActivityManager) context
.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningAppProcessInfo> appProcesses = activityManager
.getRunningAppProcesses();
for (RunningAppProcessInfo appProcess : appProcesses) {
if (appProcess.processName.equals(context.getPackageName())) {
if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {
Log.i(String.format("Background App:", appProcess.processName));
return true;
}else{
Log.i(String.format("Foreground App:", appProcess.processName));
return false;
}
}
}
return false;