Android应用源码之(Bitmap位图渲染与操作-IT计算机-毕业设计.zip

package com.bp; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; 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; //声明一个画笔 private Paint paint; //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; private Bitmap bmp; /** * 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); //实例一个画笔 paint = new Paint(); //设置画笔颜色为白色 paint.setColor(Color.WHITE); //设置焦点 setFocusable(true); bmp = BitmapFactory.decodeResource(this.getResources(), R.drawable.icon); } /** * 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.BLACK); //----------绘制位图 //canvas.drawBitmap(bmp, 0, 0, paint); //----------旋转位图(方式1) //canvas.save(); //canvas.rotate(30, bmp.getWidth()/2, bmp.getHeight()/2); //canvas.drawBitmap(bmp, 0, 0, paint); //canvas.restore(); //canvas.drawBitmap(bmp, 100, 0, paint); //----------旋转位图(方式2) //Matrix mx = new Matrix(); //mx.postRotate(30, bmp.getWidth() / 2, bmp.getHeight() / 2); //canvas.drawBitmap(bmp, mx, paint); //----------平移位图(方式1) //canvas.save(); //canvas.translate(10, 10); //canvas.drawBitmap(bmp, 0, 0, paint); //canvas.restore(); //----------平移位图(方式2) //Matrix maT = new Matrix(); //maT.postTranslate(10, 10); //canvas.drawBitmap(bmp, maT, paint); //----------缩放位图(方式1) //canvas.save(); //canvas.scale(2f, 2f, 50 + bmp.getWidth() / 2, 50 + bmp.getHeight() / 2); //canvas.drawBitmap(bmp, 50, 50, paint); //canvas.restore(); //canvas.drawBitmap(bmp, 50, 50, paint); //----------缩放位图(方式2) //Matrix maS = new Matrix(); //maS.postTranslate(50, 50); //maS.postScale(2f, 2f, 50 + bmp.getWidth() / 2, 50 + bmp.getHeight() / 2); //canvas.drawBitmap(bmp, maS, paint); //canvas.drawBitmap(bmp, 50, 50, paint); //----------镜像反转位图(方式1) //X轴镜像 //canvas.drawBitmap(bmp, 0, 0, paint); //canvas.save(); //canvas.scale(-1, 1, 100 + bmp.getWidth() / 2, 100 + bmp.getHeight() / 2); //canvas.drawBitmap(bmp, 100, 100, paint); //canvas.restore(); //Y轴镜像 //canvas.drawBitmap(bmp, 0, 0, paint); //canvas.save(); //canvas.scale(1, -1, 100 + bmp.getWidth() / 2, 100 + bmp.getHeight() / 2); //canvas.drawBitmap(bmp, 100, 100, paint); //canvas.restore(); //----------镜像反转位图(方式2) //X轴镜像 canvas.drawBitmap(bmp, 0, 0, paint); Matrix maMiX = new Matrix(); maMiX.postTranslate(100, 100); maMiX.postScale(-1, 1, 100 + bmp.getWidth() / 2, 100 + bmp.getHeight() / 2); canvas.drawBitmap(bmp, maMiX, paint); //Y轴镜像 canvas.drawBitmap(bmp, 0, 0, paint); Matrix maMiY = new Matrix(); maMiY.postTranslate(100, 100); maMiY.postScale(1, -1, 100 + bmp.getWidth() / 2, 100 + bmp.getHeight() / 2); canvas.drawBitmap(bmp, maMiY, paint); } } 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; } }