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@Override
protected void onStop() {
if (!isAppOnForeground()) {
Debug.i("dwy", "enter background");
mIsBackground = true;
} else {
Debug.i("dwy", "foreground");
mIsBackground = false;
}
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Judge is App in background when onStop() get called.
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public boolean isAppOnForeground() {
// Returns a list of application processes that are running on the
// device
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) {
// The name of the process that this object is associated with.
if (appProcess.processName.equals(packageName)
&& appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
return true;
}
}
return false;
}
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方法二：
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/**
* 需要权限:android.permission.GET_TASKS
*
* @param context
* @return
*/
public boolean isApplicationBroughtToBackground(Context context) {
ActivityManager am = (ActivityManager) context
.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningTaskInfo> tasks = am.getRunningTasks(1);
if (tasks != null && !tasks.isEmpty()) {
ComponentName topActivity = tasks.get(0).topActivity;
Debug.i(TAG, "topActivity:" + topActivity.flattenToString());
Debug.f(TAG, "topActivity:" + topActivity.flattenToString());
if (!topActivity.getPackageName().equals(context.getPackageName())) {
return true;
}
}
return false;
}
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