我想把它动态地添加到文本视图中。
我有3个文本视图,根据某种状态,我添加它作为一个compoundDrawable。
TextViewCompat.setCompoundDrawablesRelative(targetTextView, null, null, drawable, null);
我希望图像几乎垂直居中于文本视图+比中心低1sp的长度。所以在每个文本视图中我都添加了
android:gravity="center_vertical"
但是在添加compundimageview之前,文本视图似乎也相对于它的位置向下移动了。
但是等待observerTree会让代码变得很复杂。
以下是我对(1)选项的代码:
private void tintAndAddPadding(
...
@DrawableRes int drawableId, @ColorRes int colorId) {
Drawable drawable =
Preconditions.checkNotNull(AppCompatResources.getDrawable(getContext(), drawableId));
Drawable drawableWithTint = DrawableCompat.wrap(drawable);
DrawableCompat.setTint(
drawableWithTint.mutate(), getContext().getResources().getColor(colorId));
// Bitmap dimensions sets the canvas dimensions
Bitmap bitmap =
Bitmap.createBitmap(
getContext()
.getResources()
.getDimensionPixelSize(R.dimen.account_menu_collapse_expand_width),
getContext()
.getResources()
.getDimensionPixelSize(R.dimen.account_menu_collapse_expand_canvas_height),
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
// Drawable bounds should be all 4 coordinates on the canvas to draw on.
// This implies the drawable width and height.
drawableWithTint.setBounds(
0,
getContext()
.getResources()
.getDimensionPixelSize(R.dimen.account_menu_collapse_expand_top_padding)
, canvas.getWidth(),
canvas.getHeight() -
getContext()
.getResources()
.getDimensionPixelSize(R.dimen.account_menu_collapse_expand_top_padding));
drawableWithTint.draw(canvas);
TextViewCompat.setCompoundDrawablesRelative(targetTextView, null, null, drawableWithTint, null);
// Padding between text and drawable
targetTextView.setCompoundDrawablePadding(
getContext()
.getResources()
.getDimensionPixelSize(R.dimen.account_menu_collapse_expand_left_padding))
}