先得到 TopTask
protected ActivityManager mActivityManager;
mActivityManager = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE);
public ActivityManager.RunningTaskInfo getTopTask() {
List<ActivityManager.RunningTaskInfo> tasks = mActivityManager.getRunningTasks(1);
if (tasks != null && !tasks.isEmpty()) {
return tasks.get(0);
}
return null;
}
再判断 Activity 是不是在栈的最上面
public boolean isTopActivity(
ActivityManager.RunningTaskInfo topTask,
String packageName,
String activityName) {
if (topTask != null) {
ComponentName topActivity = topTask.topActivity;
if (topActivity.getPackageName().equals(packageName) &&
topActivity.getClassName().equals(activityName)) {
return true;
}
}
return false;
}
举个例子
public void yourMethod() {
if (isTopActivity(getTopTask(), yourPackageName, yourActivityName)) {
//
} else {
//
}
}
