首先看下 效果
带图片箭头的按钮
核心代码:
package com.ztesoft.zsmart.datamall.app.widget;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.Button;
/**
* Description: 自定义Button(图文居中)
* Author: 0027008122 [yang.jianan@zte.com.cn]
* Time: 2016/1/26 14:21
* Version: 1.0
*/
public class DrawableCenterButton extends Button{
public DrawableCenterButton(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public DrawableCenterButton(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public DrawableCenterButton(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onDraw(Canvas canvas) {
Drawable[] drawables = getCompoundDrawables();
if (drawables != null) {
Drawable drawableLeft = drawables[2];
if (drawableLeft != null) {
float textWidth = getPaint().measureText(getText().toString());
int drawablePadding = getCompoundDrawablePadding();
int drawableWidth = 0;
drawableWidth = drawableLeft.getIntrinsicWidth();
// 20 是偏移量,不加,长文本会折行
float bodyWidth = textWidth + 20 + drawableWidth + drawablePadding;
setPadding(0, 0, (int)(getWidth() - bodyWidth), 0);
canvas.translate((getWidth() - bodyWidth) / 2, 0);
}
}
super.onDraw(canvas);
}
}
