Android应用源码之(游戏保存之SharedPreference)-IT计算机-毕业设计.zip

package com.spfp; import android.content.Context; import android.content.SharedPreferences; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; 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 { private SurfaceHolder sfh; private Paint paint; private Thread th; private boolean flag; private Canvas canvas; private int screenW, screenH; //记录当前圆形所在九宫格的位置下标 private int creentTileIndex; //声明一个SharedPreferences对象 private SharedPreferences sp; /** * SurfaceView初始化函数 */ public MySurfaceView(Context context) { super(context); sfh = this.getHolder(); sfh.addCallback(this); paint = new Paint(); paint.setColor(Color.BLACK); paint.setAntiAlias(true); setFocusable(true); //通过Context获取SharedPreference实例 sp = context.getSharedPreferences("SaveName", Context.MODE_PRIVATE); //每次程序运行时获取圆形的下标 int tempIndex = sp.getInt("CirCleIndex", -1); //判定如果返回-1 说明没有找到，就不对当前记录圆形的变量进行赋值 if (tempIndex != -1) { creentTileIndex = tempIndex; } } /** * 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); paint.setColor(Color.BLACK); paint.setStyle(Style.STROKE); //绘制九宫格(将屏幕九等份) //得到每个方格的宽高 int tileW = screenW / 3; int tileH = screenH / 3; for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { canvas.drawRect(i * tileW, j * tileH, (i + 1) * tileW, (j + 1) * tileH, paint); } } //根据得到的圆形下标位置进行绘制相应的方格中 paint.setStyle(Style.FILL); canvas.drawCircle(creentTileIndex % 3 * tileW + tileW / 2, creentTileIndex / 3 * tileH + tileH / 2, 30, paint); //操作说明 canvas.drawText("上键：保存游戏", 0, 20, paint); canvas.drawText("下键：读取游戏", 110, 20, paint); canvas.drawText("左右键：移动圆形", 215, 20, 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) { //上键保存游戏状态 if (keyCode == KeyEvent.KEYCODE_DPAD_UP) { sp.edit().putInt("CirCleIndex", creentTileIndex).commit(); //下键读取游戏状态 } else if (keyCode == KeyEvent.KEYCODE_DPAD_DOWN) { int tempIndex = sp.getInt("CirCleIndex", -1); if (tempIndex != -1) { creentTileIndex = tempIndex; } //圆形的移动 } else if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) { if (creentTileIndex > 0) { creentTileIndex -= 1; } } else if (keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) { if (creentTileIndex < 8) { creentTileIndex += 1; } } 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; } }