Android自定义View实现简单文字描边功能

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：

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。