以编程方式创建的XML Drawables无法正确显示

Question

我试图将ListView变成可绘制的XML文件 我所做的就是我已将Item中的每个ListView变为BitmapDrawable，并将array全部变为LayerDrawable所以我可以制作 ListAdapter adapter = listView.getAdapter(); View childView1 = adapter.getView(0, null, listView); View childView2 = adapter.getView(1, null, listView); View childView3 = adapter.getView(2, null, listView); View childView4 = adapter.getView(3, null, listView); childView1.measure(View.MeasureSpec.makeMeasureSpec(listView.getWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)); childView1.layout(0, 0, childView1.getMeasuredWidth(), childView1.getMeasuredHeight()); childView2.measure(View.MeasureSpec.makeMeasureSpec(listView.getWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)); childView2.layout(0, 0, childView2.getMeasuredWidth(), childView2.getMeasuredHeight()); childView3.measure(View.MeasureSpec.makeMeasureSpec(listView.getWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)); childView3.layout(0, 0, childView3.getMeasuredWidth(), childView3.getMeasuredHeight()); childView4.measure(View.MeasureSpec.makeMeasureSpec(listView.getWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)); childView4.layout(0, 0, childView4.getMeasuredWidth(), childView4.getMeasuredHeight()); childView1.setDrawingCacheEnabled(true); childView1.buildDrawingCache(); childView2.setDrawingCacheEnabled(true); childView2.buildDrawingCache(); childView3.setDrawingCacheEnabled(true); childView3.buildDrawingCache(); childView4.setDrawingCacheEnabled(true); childView4.buildDrawingCache(); Bitmap bmp1 = childView1.getDrawingCache().copy(Bitmap.Config.ARGB_8888, false); Bitmap bmp2 = childView2.getDrawingCache().copy(Bitmap.Config.ARGB_8888, false); Bitmap bmp3 = childView3.getDrawingCache().copy(Bitmap.Config.ARGB_8888, false); Bitmap bmp4 = childView4.getDrawingCache().copy(Bitmap.Config.ARGB_8888, false); BitmapDrawable bd1 = new BitmapDrawable(getResources(), bmp1); BitmapDrawable bd2 = new BitmapDrawable(getResources(), bmp2); BitmapDrawable bd3 = new BitmapDrawable(getResources(), bmp3); BitmapDrawable bd4 = new BitmapDrawable(getResources(), bmp4); BitmapDrawable drawables[] = {bd1, bd2, bd3, bd4}; LayerDrawable wow = new LayerDrawable(drawables); root.setBackground(wow); 他们，而不是我作为背景。

像这样：

    String hi[] = {"1", "2", "3", "4"};
    ArrayList<String> hourArray = new ArrayList<>(Arrays.asList(hi));
    hourArrayAdapter = new ArrayAdapter<>(this, R.layout.listitem_forecast, R.id.listitem_forecast_textview, hourArray);
    listView = (ListView) findViewById(R.id.hourList);
    listView.setAdapter(hourArrayAdapter);

但这是结果.......................................... ...................

这就是目标......（虽然只有4个ListItems）

任何建议都将不胜感激！

编辑：这是ListView ...

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