Android应用程序ImageView。在设备上不起作用

Question

在onResume中，我获得了需要更改其可见性的窗口小部件的引用。日志猫显示，首选项中的设置正确返回（show_images，show_titles，show_descriptions）。日志猫显示if else应当按原样放入每个if else语句中。但是在设备上，大约有50％的时间在启动时某些卡会显示为空白。在进行偏好更改后，有些将完全显得空白，而有些时候它似乎可以正常工作。我尝试从设备进行clean，cleanbuild和CleanUnInstall，但没有运气。这是在onResume中。在调用父onResume并获得偏好之后。

    Log.i("INFO", show_images + "" + " "+ show_titles +" " + show_descriptions );
    //force the layout to load before changing properties
    try{
        Thread.sleep(1000);
    } catch (Exception e) {
        e.printStackTrace();
    }

    if(!show_images){
        Log.i("INFO", "show images false");
        image1.setVisibility(View.GONE);
        image2.setVisibility(View.GONE);
        image3.setVisibility(View.GONE);
        image4.setVisibility(View.GONE);
        image5.setVisibility(View.GONE);
    } else{
        Log.i("INFO", "show images true");
        image1.setVisibility(View.VISIBLE);
        image2.setVisibility(View.VISIBLE);
        image3.setVisibility(View.VISIBLE);
        image4.setVisibility(View.VISIBLE);
        image5.setVisibility(View.VISIBLE);
     }

    if(!show_titles){
        Log.i("INFO", "show titles false");
        rTitle1.setVisibility(View.GONE);
        rTitle2.setVisibility(View.GONE);
        rTitle3.setVisibility(View.GONE);
        rTitle4.setVisibility(View.GONE);
        rTitle5.setVisibility(View.GONE);
    }else{
        Log.i("INFO", "show titles true");
        rTitle1.setVisibility(View.VISIBLE);
        rTitle2.setVisibility(View.VISIBLE);
        rTitle3.setVisibility(View.VISIBLE);
        rTitle4.setVisibility(View.VISIBLE);
        rTitle5.setVisibility(View.VISIBLE);
    }

    if(!show_descriptions){
        Log.i("INFO", "show desc false");
        rDescription1.setVisibility(View.GONE);
        rDescription2.setVisibility(View.GONE);
        rDescription3.setVisibility(View.GONE);
        rDescription4.setVisibility(View.GONE);
        rDescription5.setVisibility(View.GONE);
    }else{
        Log.i("INFO", "show desc true");
        rDescription1.setVisibility(View.VISIBLE);
        rDescription2.setVisibility(View.VISIBLE);
        rDescription3.setVisibility(View.VISIBLE);
        rDescription4.setVisibility(View.VISIBLE);
        rDescription5.setVisibility(View.VISIBLE);
    }
}`

Answer 1

不确定为什么。但是将布局从constraintLayout转换为linearlayouts。然后相同的onResume可以控制小部件的可见性。需要对布局问题进行调整，但是数据持久性的工作原理是