本文实例为大家分享了Android实现简单文字描边功能的具体代码,供大家参考,具体内容如下
效果图:
实现代码:
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package com.example.zhangyu.myview.widget; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Picture; import android.graphics.Rect; import android.graphics.RectF; import android.os.Build; import android.support.annotation.Nullable; import android.support.annotation.RequiresApi; import android.util.AttributeSet; import android.view.View; import com.example.zhangyu.myview.R; public class TouchPullView extends View { //圆的半径 private float mCircleRadius; private Paint paint; private Rect rect= new Rect(); private int count; public TouchPullView(Context context) { super (context); init(); } public TouchPullView(Context context, @Nullable AttributeSet attrs) { super (context, attrs); init(); } public TouchPullView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super (context, attrs, defStyleAttr); init(); } @RequiresApi (api = Build.VERSION_CODES.LOLLIPOP) public TouchPullView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) { super (context, attrs, defStyleAttr, defStyleRes); init(); } /** * 初始化 */ private void init() { paint = new Paint(Paint.ANTI_ALIAS_FLAG); //设置抗锯齿 paint.setAntiAlias( true ); //设置防抖动 paint.setDither( true ); //设置填充方式 paint.setStyle(Paint.Style.FILL_AND_STROKE); //View的点击事件 setOnClickListener( new OnClickListener() { @Override public void onClick(View v) { count++; invalidate(); //重新绘制 } }); } @Override protected void onDraw(Canvas canvas) { super .onDraw(canvas); //设置方形画笔,背景。 paint.setColor(Color.YELLOW); //先绘制底板 canvas.drawRect( 0 , 0 , getWidth(), getHeight(), paint); float x = getWidth() / 2 ; float y = getHeight() / 2 ; float offset = getWidth()/ 6 ; //绘制圆形 paint.setColor(Color.GRAY); mCircleRadius = offset* 1 .41f; canvas.drawCircle(x, y, mCircleRadius, paint); //绘制图片 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.pic1); if (bitmap != null ) { canvas.drawBitmap(bitmap, null , new RectF(x-offset,y-offset,x+offset,y+offset),paint); } //绘制文字外层的文字,边框 String s = String.valueOf(count); paint.setStrokeWidth( 10 ); paint.setColor(Color.RED); paint.setTextSize( 100 ); paint.getTextBounds(s, 0 ,s.length(),rect); float textWidth = rect.width(); float textHeight = rect.height(); x = getWidth()/ 2 -textWidth/ 2 ; y = getHeight() / 2 +textHeight/ 2 ; canvas.drawText(s, x, y, paint); //绘制文字 paint.setColor(Color.BLUE); paint.setStrokeWidth( 0 ); canvas.drawText(s, x, y, paint); } } |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/yu540135101/article/details/84928773