Android猜牌小游戏（改进版）

此篇基于 Android猜牌小游戏修改，简化代码，逻辑更为合理。

只修改MainActivity.java部分的代码：

package com.ming.puke;import java.util.ArrayList;import java.util.Random;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;public class MainActivity extends Activity {private Button btnplayagian;// 再玩一次private boolean isopened = false;// 判断是否已开牌private int[] pks = { R.drawable.p01, R.drawable.p02, R.drawable.p03 };// 存放3张扑克的值private ArrayList<ImageView> pkimages = new ArrayList<ImageView>();// 存放3张扑克的体protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);pkimages.add((ImageView) findViewById(R.id.puke1));pkimages.add((ImageView) findViewById(R.id.puke2));pkimages.add((ImageView) findViewById(R.id.puke3));for (int i = 0; i < pkimages.size(); i++) {pkimages.get(i).setOnClickListener(l);}btnplayagian = (Button) findViewById(R.id.btnplayagian);btnplayagian.setOnClickListener(l);randomPuke();}OnClickListener l = new OnClickListener() {public void onClick(View v) {if (v.getId() == R.id.btnplayagian) {randomPuke();} else {if (!isopened) {// 如果牌还没开才能开牌for (int i = 0; i < pkimages.size(); i++) {pkimages.get(i).setImageResource(pks[i]);if (i != pkimages.indexOf(v)) {// 将玩家没选择的牌面以灰暗效果处理pkimages.get(i).setAlpha(100);// 设置透明度，取值范围为0~255，数值越小越透明。}}Toast.makeText(// 显示开牌结果MainActivity.this,R.drawable.p01 == pks[pkimages.indexOf(v)] ? "恭喜你猜对了": "遗憾你猜错了", Toast.LENGTH_SHORT).show();isopened = true;}}}};/** 洗牌 */public void randomPuke() {for (int i = 0; i < pkimages.size(); i++) {// 随机替换牌的顺序（并将洗好的牌翻到背面）pkimages.get(i).setImageResource(R.drawable.p04);int item = new Random().nextInt(3);// 抽出第item张牌pkimages.get(i).setAlpha(255);// 初始化选中状态pks[item] = pks[0] + 0 * (pks[0] = pks[item]);// 将第item张牌与第1张牌替换}isopened = false;}}

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