android实现猜扑克牌小游戏（改进：每次只可以选择一张）

android实现猜扑克牌小游戏

• 项目目录

• 

• 实现效果
  
  
  

• XML代码如下

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context=".MainActivity">
    <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/cai"
       android:textColor="#008"
        android:id="@+id/result"
    android:textSize="30dp"/>
<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_margin="40dp"
    android:orientation="horizontal">
    <ImageView
        android:id="@+id/img1"
        android:layout_width="100dp"
        android:layout_height="150dp"
        android:layout_weight="1"
        android:onClick="click"
        android:layout_marginRight="20dp"
        android:src="@drawable/p"/>
    <ImageView
        android:id="@+id/img2"
        android:layout_width="100dp"
        android:layout_height="150dp"
        android:layout_weight="1"
        android:onClick="click"
        android:layout_marginRight="20dp"
        android:src="@drawable/p"/>
    <ImageView
        android:id="@+id/img3"
        android:layout_width="100dp"
        android:layout_height="150dp"
        android:layout_weight="1"
        android:onClick="click"
        android:src="@drawable/p"/>
    </LinearLayout>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="再来一次"
        android:id="@+id/btn"
        android:background="#f66"
        android:layout_gravity="center"
        android:textSize="30dp"/>

</LinearLayout>

• java代码

package com.example.acer.pkp;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
   private ImageView img1;
   private ImageView img2;
   private ImageView img3;
   private Button btn;
   private TextView result;   //定义按钮，图片视图，文本框

   @Override
   protected void onCreate(Bundle savedInstanceState) {    //重写onCreate方法
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       img1=(ImageView)findViewById(R.id.img1);    //获取图片资源
       img2=(ImageView)findViewById(R.id.img2);
       img3=(ImageView)findViewById(R.id.img3);    //获取按钮和文本框
       btn= (Button)findViewById(R.id.btn);
       result= (TextView) findViewById(R.id.result);
       btn.setOnClickListener(new View.OnClickListener() { //为按钮设置监听事件
           @Override                               //重写onClick方法
           public void onClick(View v) {
               img1.setImageResource(R.drawable.p);    //运用setImageResource设置初始的图片
               img2.setImageResource(R.drawable.p);
               img3.setImageResource(R.drawable.p);
               TextView result= (TextView) findViewById(R.id.result);  //定义文本框初始显示的内容
               result.setText("猜猜K是哪一张");  //调用setText方法获取文本框内容
           }
       });
   }
public void click(View view){ //运用click方法
   switch (view.getId()){
       case R.id.img1:
           img1.setImageResource(R.drawable.j);
           result.setText("选择错误！");
           break;
   }
   switch (view.getId()){    
       case R.id.img2:
           img2.setImageResource(R.drawable.k);
           result.setText("选择正确！");
           break;
   }
   switch (view.getId()){
       case R.id.img3:
           img3.setImageResource(R.drawable.q);
           result.setText("选择错误！");
           break;
   }
   }
}

• 思考
  代码优化：每次只可以选择一张
  优化方法：设置布尔变量

• 实现效果
  

package com.example.acer.pkp;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
    private ImageView img1;
    private ImageView img2;
    private ImageView img3;
    private Button btn;
    private TextView result;   //定义按钮，图片视图，文本框
    private boolean a = true;	//设置布尔变量

    @Override
    protected void onCreate(Bundle savedInstanceState) {    //重写onCreate方法
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        img1 = (ImageView) findViewById(R.id.img1);    //获取图片资源
        img2 = (ImageView) findViewById(R.id.img2);
        img3 = (ImageView) findViewById(R.id.img3);    //获取按钮和文本框
        btn = (Button) findViewById(R.id.btn);
        result = (TextView) findViewById(R.id.result);
        btn.setOnClickListener(new View.OnClickListener() { //为按钮设置监听事件
            @Override                               //重写onClick方法
            public void onClick(View v) {
                img1.setImageResource(R.drawable.p);    //运用setImageResource设置初始的图片
                img2.setImageResource(R.drawable.p);
                img3.setImageResource(R.drawable.p);
                TextView result = (TextView) findViewById(R.id.result);  //定义文本框初始显示的内容
                result.setText("猜猜K是哪一张");  //调用setText方法获取文本框内容
                a = true;   //执行一次之后是false，重新设置布尔变量，每次初始化都是true
            }
        });
    }

    public void click(View view) { //运用click方法
        if (a) {
            switch (view.getId()) {
                case R.id.img1:
                    img1.setImageResource(R.drawable.j);
                    result.setText("选择错误！");
                    a=false;   //跳出循环下面的就不可执行
                break;
                case R.id.img2:
                    img2.setImageResource(R.drawable.k);
                    result.setText("选择正确！");
                    a=false;
                break;
                case R.id.img3:
                    img3.setImageResource(R.drawable.q);
                    result.setText("选择错误！");
                    a=false;
                break;
            }
        }
    }
}