TextView 文字描边

在不是很明显的描边可以使用阴影来互动如下： android:shadowColor阴影颜色 android:shadowDx阴影的水平偏移量 android:shadowDy阴影的垂直偏移量 android:shadowRadius阴影的范围
真正的描边方法如下：

实现方法是两个TextView叠加,只有描边的TextView为底,实体TextView叠加在上面

public class MyTextView2 extends TextView {    private TextView borderText = null;///用于描边的TextView    public MyTextView2(Context context) {        super(context);        borderText = new TextView(context);        init();    }    public MyTextView2(Context context, AttributeSet attrs) {        super(context, attrs);        borderText = new TextView(context, attrs);        init();    }    public MyTextView2(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        borderText = new TextView(context, attrs, defStyleAttr);        init();    }    public void init() {        TextPaint tp1 = borderText.getPaint();        tp1.setStrokeWidth(1); //设置描边宽度        tp1.setStyle(Paint.Style.STROKE); //对文字只描边        borderText.setTextColor(Color.GREEN); //设置描边颜色        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();        //两个TextView上的文字必须一致        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, bottom);        borderText.layout(left, top, right, bottom);    }    @Override    protected void onDraw(Canvas canvas) {        borderText.draw(canvas);        super.onDraw(canvas);    }}

产考:

http://www.oschina.net/code/snippet_586849_37287

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