Question

我正在尝试设置按钮最右侧有一个图标的按钮。到目前为止我得到了以下内容：

<style name="MenuButton" parent="@android:style/Widget.Holo.Light.Button">
    <item name="android:textColor">#000000</item>
    <item name="android:layout_margin">0dp</item>
    <item name="android:minHeight">60dp</item>
    <item name="android:layout_width">fill_parent</item>
    <item name="android:padding">10dp</item>
    <item name="android:textStyle">bold</item>
    <item name="android:drawableRight">@drawable/arrow_icon</item>
    <item name="android:drawablePadding">170dip</item>
    <item name="android:background">@drawable/custom_menu_btn_bg</item>
</style>

然而，这仅将图像放在按钮内文本的右侧，但无论按钮中有多少文本，我都需要它位于按钮的最右侧。

到目前为止，我只是使用drawablePadding向右推，但这不会起作用，因为我将动态创建这些按钮，并且不知道我需要多少填充。

由于

Answer 1

试试这个：

 <Button
    android:layout_width="fill_parent"
    android:layout_height="100dp"
    android:layout_margin="0dp"
    android:drawableRight="@drawable/ic_launcher"
    android:minHeight="60dp"
    android:padding="10dp"
   />

Answer 2

您可以扩展Button课程并自己绘制图像。通常我会避免使用android:drawableRight并定义自定义XML属性，但为了简单起见，我将“窃取”您提供的drawableRight。

public class MyButton extends Button {
    private Drawable rightDrawable;
    private Rect bounds;

    /* do this for the other 2 constructors as well */
    public MyButton(Context context) {
        super(context);
        init();
    }

    private void init() {
        bounds = new Rect();

        Drawable[] drawables = getCompoundDrawables();
        rightDrawable = drawables[2];
        if (rightDrawable != null) {
            // we are going to draw this drawable, so remove it from the superclass'
            // drawables
            setCompoundDrawables(drawables[0], drawables[1], null, drawables[3]);
        }
    }

    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        if (w != oldW || h != oldh) {
            /* 
             * View's size changed, recalculate drawable bounds
             *
             * Do some math here to figure out where exactly the drawable should
             * be drawn. Make sure to take into account the drawable's intrinsic
             * height (use getIntrinsicHeight()), as well as the top, bottom, and
             * right padding of this button (use getPaddingLeft(), etc.)
             *
             * For the sake of not leading you astray with code that may not work,
             * I've not attempted those calculations. Eventually, you would call...
             */

             rect.setBounds(left, top, right, bottom);
        }
    }

    @Override
    public void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        if (rightDrawable != null) {
            rightDrawable.setBounds(rect);
            rightDrawable.draw(canvas);
        }
    }
}

如何将图像浮动到Android按钮的右侧？

2 个答案: