ImageView不会显示

Question

在OnCreate中：

svMaster = (ScrollView) findViewById(R.id.scroller);     //Only layout in XML file
    svMaster.setVerticalFadingEdgeEnabled(false);
    Display display = ((WindowManager)getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
    height = display.getHeight();

...

initializeGUI();
svMaster.removeAllViews();
svMaster.addView(llMaster);

在initializeGUI（）中：

llMaster = new LinearLayout(this);         //Only direct child of scrollview
LinearLayout llFirstScreen = new LinearLayout(this);  //First layout added to llMaster;
                                                      //It's size is that of one screen
LinearLayout.LayoutParams lpMaster = new LinearLayout.LayoutParams
            (LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);

LinearLayout.LayoutParams lpFirstScreen = new LinearLayout.LayoutParams
            (LayoutParams.MATCH_PARENT, height);

    llMaster.setLayoutParams(lpMaster);
    llMaster.setOrientation(LinearLayout.VERTICAL);

    llFirstScreen.setLayoutParams(lpFirstScreen);
    llFirstScreen.setBackgroundResource(R.color.blue2);
    llFirstScreen.setOrientation(LinearLayout.VERTICAL);

这是我与ImageView相关的代码：

ImageView ivWeather = new ImageView(this);

LinearLayout.LayoutParams ivWeatherParams = new LinearLayout.LayoutParams
            (Scale(80), Scale(80);

ivWeather.setImageResource(R.drawable.sunny);
Log.d("ImageView loading?", "I hope so");
ivWeather.setScaleType(ScaleType.FIT_XY);
ivWeather.setLayoutParams(ivWeatherParams);
ivWeather.setVisibility(View.VISIBLE);      //This is code I tried
ivWeather.setFocusable(true);               //when it wouldn't show up
ivWeather.setFocusableInTouchMode(true);    //...
ivWeather.invalidate();                     //...

...

llFirstScreen.addView(ivWeather);
Log.d("ImageView loading?", "I hope so");
llMaster.addView(llFirstScreen);

...

我已经毫无问题地将TextView添加到llFirstScreen，我想知道为什么ImageView 不会出现。我什至尝试将 llFirstScreen 的高度调整为 WRAP_CONTENT 而不是屏幕的高度。所做的只是将布局缩小到两个 TextView。就好像它从未添加过 ImageView 一样。我输入的日志已签出，因此我知道代码正在运行。 我错过了什么吗？

Answer 1

您是否尝试过将 LinearLayout.LayoutParams 从 Scale(80)、Scale(80) 更改为 LayoutParams.WRAP_CONTENT、LayoutParams.FILL_PARENT 等？我从未见过使用 Scale(int) 。如果这是自定义方法，您可以发布吗？