字体描边 终极版

package com.joyodream.common.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint.Style;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.TextView;

/**
 *
 * 描边，默认是灰色描边
 *
 * @author lipeilong
 *
 */
public class JDStrokeTextView extends TextView {

    private TextView borderText = null;
    private final int STROKE_WIDTH        = 6;　　// 线宽度

    public JDStrokeTextView(Context context) {
        super(context);
        borderText = new TextView(context);
        init();
    }

    public JDStrokeTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        borderText = new TextView(context,attrs);
        init();
    }

    public JDStrokeTextView(Context context, AttributeSet attrs,
            int defStyle) {
        super(context, attrs, defStyle);
        borderText = new TextView(context,attrs,defStyle);
        init();
    }

    public void init(){
        TextPaint tp1 = borderText.getPaint();
        tp1.setStrokeWidth(STROKE_WIDTH);
        tp1.setStyle(Style.STROKE);
        borderText.setTextColor(0xff333333);
        borderText.setGravity(getGravity());
    }

    @Override
    public void setLayoutParams (ViewGroup.LayoutParams params){
        super.setLayoutParams(params);
        borderText.setLayoutParams(params);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        CharSequence tt = borderText.getText();
        if(tt== null || !tt.equals(this.getText())){
            borderText.setText(getText());
            this.postInvalidate();
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        borderText.measure(widthMeasureSpec, heightMeasureSpec);
    }

    protected void onLayout (boolean changed, int left, int top, int right, int bottom){
        super.onLayout(changed, left, top, right+STROKE_WIDTH, bottom);
        borderText.layout(left, top, right+STROKE_WIDTH, bottom);// 总要，否则会截断部分文字
    }

    @Override
    protected void onDraw(Canvas canvas) {
        borderText.draw(canvas);
        super.onDraw(canvas);
    }

}

网上找的几种解决方案中，这个是最靠谱的了。使用系统自带的阴影也是可以实现部分效果，看情况选择使用