学习Android之第四个小程序猜拳（代码实现MENU、自定义对话框）

效果图如下：



点击“菜单”键：



点击”关于“：



点击“出拳”：



一共建立了两个包，一个包中两个activity，另一个包中computer类，people类。

此程序主要穿插自定义对话框和代码实现菜单知识。

代码如下：

MainAcitity.java

package cn.edu.bzu.caiquan.activity;

import cn.edu.bzu.test.R;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

import android.view.View.OnClickListener;
import android.widget.*;

public class MainActivity extends Activity {

public static final int MENU_ABOUT=1;  //关于菜单
public static final int MENU_EXIT =2;  //关于菜单

RadioButton shitou;
RadioButton jianzi;
RadioButton bu;
Button chuquan;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();

}

public void init(){
shitou = (RadioButton)findViewById(R.id.shitou);
jianzi = (RadioButton)findViewById(R.id.jianzi);
bu = (RadioButton)findViewById(R.id.bu);

chuquan = (Button)findViewById(R.id.dongzuo);
chuquan.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {

int i;

if(shitou.isChecked()) {
i = 1;

}else if(jianzi.isChecked()){
i = 2;

}else{
i = 3;

}

Intent intent = new Intent();
intent.putExtra("people", i);
intent.setClass(MainActivity.this,SecondAcitity.class );
intent.putExtras(intent);
startActivity(intent);

}
});
}

/**
* 使用自定义对话框
*/
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {

case MENU_ABOUT:
LayoutInflater layoutInflater = getLayoutInflater();   //或LayoutInflater.from(）
View view = layoutInflater.inflate(R.layout.dialog_item, null);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("关于")
.setView(view)
.setPositiveButton("确定", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();

}
}).show();

break;
case MENU_EXIT:
MainActivity.this.finish();
break;
}
return super.onOptionsItemSelected(item);
}

/**
* 代码实现菜单
*/
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
//getMenuInflater().inflate(R.menu.main, menu);
menu.add(0, MENU_ABOUT, 1, "关于");
menu.add(0, MENU_EXIT, 2, "退出");
return true;
}

}

activity_main.xml

<RelativeLayout 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"
tools:context=".MainActivity" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="请你选择要出的拳头" />

<RadioGroup
android:id="@+id/chuquan"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:orientation="horizontal">

<RadioButton
android:id="@+id/shitou"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="石头"/>
<RadioButton
android:id = "@+id/jianzi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="剪子"/>
<RadioButton
android:id="@+id/bu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="布"/>

</RadioGroup>

<Button
android:id="@+id/dongzuo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="120dp"
android:layout_centerHorizontal="true"
android:text="出拳"/>

</RelativeLayout>

SecondAcitivity.java

package cn.edu.bzu.caiquan.activity;

import cn.edu.bzu.caiquan.lei.Computer;
import cn.edu.bzu.caiquan.lei.People;
import cn.edu.bzu.test.R;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class SecondAcitity extends Activity{

TextView textView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.second_acitity);

textView = (TextView)findViewById(R.id.TV1);

Bundle bundle = this.getIntent().getExtras(); //接受传来的值
int chuquan = bundle.getInt("people");

People people = new People(chuquan);
Computer computer = new Computer();
computer.setChuQuFanfShi( computer.chuquan());

/**
* 为使代码更简洁，可以将下列代码抽出。
*/

int peo = people.getChuQuFanfShi();
int com = computer.getChuQuFanfShi();

if(peo==1&&com==2||peo==2&&com==3||peo==3&&com==1){
if(peo==1){
textView.setText("玩家：石头"+"VS"+"电脑：剪子");
}
if(peo==2){
textView.setText("玩家：剪子"+"VS"+"电脑：布");
}
if(peo==3){
textView.setText("玩家：布"+"VS"+"电脑：石头");
}
textView.append("\n赢");
}else if(com==1&&peo==2||com==2&&peo==3||com==3&&peo==1){
if(peo==1){
textView.setText("玩家：剪子"+"VS"+"电脑：石头");
}
if(peo==2){
textView.setText("玩家：布"+"VS"+"电脑：剪子");
}
if(peo==3){
textView.setText("玩家：石头"+"VS"+"电脑：布");
}
textView.append("\n输");

}else if(com==peo||com==peo||com==peo){
if(peo==1){
textView.setText("玩家：石头"+"VS"+"电脑：石头");
}
if(peo==2){
textView.setText("玩家：剪子"+"VS"+"电脑：剪子");
}
if(peo==3){
textView.setText("玩家：布"+"VS"+"电脑：布");
}
textView.append("\n平");

}

}

}

second_acitity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/TV1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>

</LinearLayout>

Computer.java

package cn.edu.bzu.caiquan.lei;

import java.util.Random;

public class Computer {

private int chuQuFanfShi;

public int getChuQuFanfShi() {
return chuQuFanfShi;
}

public void setChuQuFanfShi(int chuQuFanfShi) {
this.chuQuFanfShi = chuQuFanfShi;
}

public int chuquan(){

Random random = new Random();
return  random.nextInt(3)+1;
}

}

People.java

package cn.edu.bzu.caiquan.lei;

public class People {

private int chuQuFanfShi;

public People(int chuQuFanfShi){
this.chuQuFanfShi = chuQuFanfShi;

}

public int getChuQuFanfShi() {
return chuQuFanfShi;
}

public void setChuQuFanfShi(int chuQuFanfShi) {
this.chuQuFanfShi = chuQuFanfShi;
}

}

second_acitity.xml 自定义对话框布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ImageView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/tupian"/>

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:textSize="30sp"
android:text="作者：XX"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="30sp"
android:text="版本：1.0.0.10"/>

</LinearLayout>