无法缩放按钮中的可绘制对象

Question

private float iconScale = 0.05f;    
// Set size of drawables in buttons
Drawable drawable = getResources().getDrawable(R.drawable.cutlerywhite);
drawable.setBounds(0, 0, (int)(drawable.getIntrinsicWidth()),
        (int)(drawable.getIntrinsicHeight()));
ScaleDrawable sd = new ScaleDrawable(drawable, 0, iconScale, iconScale);

fnbButton.setCompoundDrawables(sd, null, null, null); //set drawableLeft for example

我正在尝试按比例缩小可在Button使用的可绘制对象。 现在，我的按钮没有任何显示：

左侧应该有一个可绘制对象。 这是什么问题 我所做的完全像在其他答案中看到的一样。

XML：

<Button
    android:id="@+id/fnbButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/rounded_button_blue"
    android:padding="5dp"
    android:text="@string/fnb_button"
    android:textAllCaps="false"
    android:textColor="@color/white"
    app:layout_constraintBaseline_toBaselineOf="@id/otherButton"
    app:layout_constraintEnd_toEndOf="parent" />

Answer 1

也许这个选项会有所帮助

   private void useScaledDrawableLeft(Button buttonView, float scale, @DrawableRes int imageResource) {
        Resources res = getResources();
        BitmapDrawable bd = (BitmapDrawable) res.getDrawable(imageResource);
        Bitmap b = Bitmap.createScaledBitmap(bd.getBitmap(),
                (int) (bd.getIntrinsicHeight() * scale),
                (int) (bd.getIntrinsicWidth() * scale),
                false);

        BitmapDrawable scaleDrawable = new BitmapDrawable(b);
        buttonView.setCompoundDrawablesWithIntrinsicBounds(scaleDrawable, null, null, null);
}

Answer 2

尝试这个

Drawable drawable = getResources().getDrawable(R.drawable.cutlerywhite);
ScaleDrawable sd = new ScaleDrawable(drawable, Gravity.CENTER, iconScale, iconScale);
Drawable d1 = sd.getDrawable();
d1.setLevel(1);
sd.setLevel(1);
fnbButton.setCompoundDrawablesWithIntrinsicBounds(sd, null, null, null);

Answer 3

我最终这样做：

Drawable drawableFnb = getResources().getDrawable(R.drawable.cutlerywhite);
Drawable drawableSunbed = getResources().getDrawable(R.drawable.logowhite);

ScaleDrawable sdFnb = new ScaleDrawable(drawableFnb, Gravity.LEFT, 1, 1);
ScaleDrawable sdSunbed = new ScaleDrawable(drawableSunbed, Gravity.LEFT, 1, 1);
Drawable d1 = sdFnb.getDrawable();
Drawable d2 = sdSunbed.getDrawable();

Dims fnbDims = getIconDims(drawableFnb);
Dims sunbedDims = getIconDims(drawableSunbed);

d1.setBounds(0, 0, fnbDims.getWidth(), fnbDims.getHeight());
d2.setBounds(0, 0, sunbedDims.getWidth(), sunbedDims.getHeight());

fnbButton.setCompoundDrawables(d1, null, null, null);
sunbedButton.setCompoundDrawables(d2, null, null, null);