文字描边--效果
package com.bn.ex12d; 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; /* * StrokeTextView的目标是给文字描边 * 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 * 看上去文字就有个不同颜色的边框了 */ public class StrokeTextView extends TextView { private TextView borderText = null;///用于描边的TextView public StrokeTextView(Context context) { super(context); borderText = new TextView(context); init(); } public StrokeTextView(Context context, AttributeSet attrs) { super(context, attrs); borderText = new TextView(context,attrs); init(); } public StrokeTextView(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(18); //设置描边宽度 tp1.setStyle(Style.STROKE); //对文字只描边 borderText.setTextColor(getResources().getColor(R.color.colorSeleter17)); //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); } }
posted on 2014-08-18 14:07 clarenceV1 阅读(290) 评论(0) 编辑 收藏 举报