Android应用源码之(Paint画笔)-IT计算机-毕业设计.zip

package com.pp; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.Paint.Style; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.SurfaceHolder.Callback; /** * * @author Himi * */ public class MySurfaceView extends SurfaceView implements Callback, Runnable { //用于控制SurfaceView private SurfaceHolder sfh; //声明一条线程 private Thread th; //线程消亡的标识位 private boolean flag; //声明一个画布 private Canvas canvas; //声明屏幕的宽高 private int screenW, screenH; /** * SurfaceView初始化函数 */ public MySurfaceView(Context context) { super(context); //实例SurfaceHolder sfh = this.getHolder(); //为SurfaceView添加状态监听 sfh.addCallback(this); //设置焦点 setFocusable(true); } /** * SurfaceView视图创建，响应此函数 */ @Override public void surfaceCreated(SurfaceHolder holder) { screenW = this.getWidth(); screenH = this.getHeight(); flag = true; //实例线程 th = new Thread(this); //启动线程 th.start(); } /** * 游戏绘图 */ public void myDraw() { try { canvas = sfh.lockCanvas(); if (canvas != null) { canvas.drawColor(Color.WHITE); //-----设置画笔无锯齿 Paint paint1 = new Paint(); canvas.drawCircle(40, 30, 20, paint1); paint1.setAntiAlias(true); canvas.drawCircle(100, 30, 20, paint1); //-----设置画笔的透明度 canvas.drawText("无透明度", 100, 70, new Paint()); Paint paint2 = new Paint(); paint2.setAlpha(0x77); canvas.drawText("半透明度", 20, 70, paint2); //-----设置绘制文本的锚点 canvas.drawText("锚点", 20, 90, new Paint()); Paint paint3 = new Paint(); //设置以文本的中心点绘制 paint3.setTextAlign(Paint.Align.CENTER); canvas.drawText("锚点", 20, 105, paint3); //------获取文本的长度 Paint paint4 = new Paint(); float len =paint4.measureText("文本宽度:"); canvas.drawText("文本长度:"+len, 20, 130, new Paint()); //------设置画笔样式 canvas.drawRect(new Rect(20,140,40,160), new Paint()); Paint paint5 = new Paint(); //设置画笔不填充 paint5.setStyle(Style.STROKE); canvas.drawRect(new Rect(60,140,80,160), paint5); //------设置画笔颜色 Paint paint6 = new Paint(); paint6.setColor(Color.GRAY); canvas.drawText("灰色", 30, 180, paint6); //------设置画笔的粗细程度 canvas.drawLine(20, 200,70, 200, new Paint()); Paint paint7 = new Paint(); paint7.setStrokeWidth(7); canvas.drawLine(20, 220,70, 220,paint7); //------设置画笔绘制文本的字体粗细 Paint paint8 = new Paint(); paint8.setTextSize(20); canvas.drawText("文字尺寸", 20, 260, paint8); //------设置画笔的ARGB分量 Paint paint9 = new Paint(); paint9.setARGB(0x77, 0xff, 0x00, 0x00); canvas.drawText("红色半透明", 20, 290, paint9); } } catch (Exception e) { // TODO: handle exception } finally { if (canvas != null) sfh.unlockCanvasAndPost(canvas); } } /** * 触屏事件监听 */ @Override public boolean onTouchEvent(MotionEvent event) { return true; } /** * 按键事件监听 */ @Override public boolean onKeyDown(int keyCode, KeyEvent event) { return super.onKeyDown(keyCode, event); } /** * 游戏逻辑 */ private void logic() { } @Override public void run() { while (flag) { long start = System.currentTimeMillis(); myDraw(); logic(); long end = System.currentTimeMillis(); try { if (end - start < 50) { Thread.sleep(50 - (end - start)); } } catch (InterruptedException e) { e.printStackTrace(); } } } /** * SurfaceView视图状态发生改变，响应此函数 */ @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { } /** * SurfaceView视图消亡时，响应此函数 */ @Override public void surfaceDestroyed(SurfaceHolder holder) { flag = false; } }