判断一个activity是否存在堆栈中

判断一个activity是否存在栈底

ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);List<ActivityManager.RunningTaskInfo> list = am.getRunningTasks(1);if (list != null && list.size() > 0) {    ComponentName cpn = list.get(0).baseActivity;    Log.e("GXL", "堆栈信息：" + cpn.getClassName());    if ("com.yukexing.mobileticket.nettaxi.mobile_html5.platform.MainActivity"            .equals(cpn.getClassName())) {        mCoverView.setVisibility(View.GONE);        finish();        return;    }
}
以免忘记，记录一下