自定义控件使用DrawableLeft/Right图片和文字同时居中

代码一：

/**
 * 自定义控件，使用drawableLeft与text水平居中显示
 */
public class DrawableLeftCenterTextView extends TextView {

	public DrawableLeftCenterTextView(Context context) {
		super(context);
	}

	public DrawableLeftCenterTextView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
	
	public DrawableLeftCenterTextView(Context context, AttributeSet attrs,
			int defStyle) {
		super(context, attrs, defStyle);
	}
	
	@Override
	protected void onDraw(Canvas canvas) {
		Drawable[] drawables = getCompoundDrawables();
		if(drawables != null){
			Drawable drawableLeft = drawables[0];
			if(drawableLeft != null){
				float textWidth = getPaint().measureText(getText().toString());
				int drawablePadding = getCompoundDrawablePadding();
				int drawableWidth = 0;
				drawableWidth = drawableLeft.getIntrinsicWidth();
				float bodyWidth = textWidth + drawableWidth + drawablePadding;
				canvas.translate((getWidth() - bodyWidth) / 2, 0);
			}
		}
		super.onDraw(canvas);
	}
	

}

代码二：

/**
 * 自定义控件，使用drawableRight与text水平居中显示
 */
public class DrawableRightCenterTextView extends TextView {

	public DrawableRightCenterTextView(Context context) {
		super(context);
	}

	public DrawableRightCenterTextView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
	
	public DrawableRightCenterTextView(Context context, AttributeSet attrs,
			int defStyle) {
		super(context, attrs, defStyle);
	}
	
	@Override
	protected void onDraw(Canvas canvas) {
		Drawable[] drawables = getCompoundDrawables();//left,top,right,bottom
		if(drawables != null){
			Drawable drawableRight = drawables[2];
			if(drawableRight != null){
				float textWidth = getPaint().measureText(getText().toString());
				int drawablePadding = getCompoundDrawablePadding();
				int drawableWidth = 0;
				drawableWidth = drawableRight.getIntrinsicWidth();
				float bodyWidth = textWidth + drawableWidth + drawablePadding;
				setPadding(0, 0, (int)(getWidth() - bodyWidth), 0);
				canvas.translate((getWidth() - bodyWidth) / 2, 0);
			}
		}
		super.onDraw(canvas);
	}
	

}