Android应用-猜数字小游戏

末蓝、 2023-01-01 15:57 262阅读 0赞

描述：
猜数字游戏包含“猜数”、“排行榜”和“设置” 3个模块。
1）“猜数”模块：随机生成一定范围内的一个整数，用户可以输入自己的猜想数字，程序进行判断并给出“猜大”、“猜小”或“正确”的3种提示
2）“排行榜”模块：根据用户猜对数字的次数进行排名显示。
3）“设置”模块：在这个模块，用户可以设置自己的用户名，也可以选择是否使用“默认姓名”进行后面的每一次猜数游戏
如果使用，后面则直接进行游戏，
如果不使用，后面的每次游戏结束后程序会提示要输入用户名，以便记录游戏历史，并在“排行榜”模块显示。
在“设置”模块，用户还可以选择接下来的要进行的猜数游戏的猜数范围，本次给出1-100,1-1000,1-10000三种范围，大家后期可以根据需要修改调整。
一、程序整体实现效果是这样的：
在这里插入图片描述
在这里插入图片描述在这里插入图片描述在这里插入图片描述
无默认姓名猜对时：
在这里插入图片描述在这里插入图片描述
二、整个项目的结构分析：
先放一张整个Project目录结构：
在这里插入图片描述res下的图片素材：
在这里插入图片描述

接下来，逐一对每个模块实现步骤进行讲解！
【数据库】
新建一个辅助类MyHelper类继承SQLiteOpenHelper类，并实现它的onCreate方法和onUpgrade方法。

  1. package com.example.mygame;
  3. import android.content.Context;
  4. import android.database.sqlite.SQLiteDatabase;
  5. import android.database.sqlite.SQLiteOpenHelper;
  7. public class MyHelper extends SQLiteOpenHelper {
  9.     public MyHelper(Context context,String name,SQLiteDatabase.CursorFactory factory,int version){
  11.         super(context,name,factory,version);
  12.     }
  14.     @Override
  15.     public void onCreate(SQLiteDatabase db) {
  17.         db.execSQL("create table ordertb(_id integer primary key "+"autoincrement," +
  18.                 "name string not null,count integer not null,range integer not null)");
  20.     }
  22.     @Override
  23.     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
  26.     }
  27. }

【下方导航栏的实现】

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:tools="http://schemas.android.com/tools"
  4.     android:layout_width="match_parent"
  5.     android:layout_height="match_parent"
  6.     tools:context=".MainActivity">
  8.     <LinearLayout
  9.         android:id="@+id/linearLayout"
  10.         android:layout_width="match_parent"
  11.         android:layout_height="60dp"
  12.         android:layout_alignParentLeft="true"
  13.         android:layout_alignParentBottom="true"
  14.         android:layout_alignParentStart="true"
  15.         android:background="#E8EEF5"
  16.         android:baselineAligned="false"
  17.         tools:ignore="Orientation"
  18.        >
  19.         <!--猜数-->
  20.         <LinearLayout
  21.             android:id="@+id/llay_guess"
  22.             android:layout_width="0dp"
  23.             android:layout_height="match_parent"
  24.             android:layout_weight="1"
  25.             android:gravity="center"
  26.             android:background="#E8EEF5"
  27.             android:orientation="vertical">
  28.             <ImageView
  29.                 android:id="@+id/img_guess"
  30.                 android:layout_width="40dp"
  31.                 android:layout_height="40dp"
  32.                 android:src="@drawable/game_on"/>
  33.             <TextView
  34.                 android:id="@+id/txt_guess"
  35.                 android:layout_width="wrap_content"
  36.                 android:layout_height="wrap_content"
  37.                 android:text="@string/txt_guess"
  38.                 android:textSize="20dp"
  39.                 android:textStyle="bold"
  40.                 android:textColor="@color/color_txt_pressed"/>
  41.         </LinearLayout>
  42.         <LinearLayout
  43.             android:layout_width="2dp"
  44.             android:layout_height="match_parent"
  45.             android:divider="@color/color_txt_pressed"
  46.             android:showDividers="end">
  48.         </LinearLayout>
  49.         <!--排行榜-->
  50.         <LinearLayout
  51.             android:id="@+id/llay_order"
  52.             android:layout_width="0dp"
  53.             android:layout_height="match_parent"
  54.             android:layout_weight="1"
  55.             android:orientation="vertical"
  56.             android:gravity="center">
  57.             <ImageView
  58.                 android:id="@+id/img_order"
  59.                 android:layout_width="40dp"
  60.                 android:layout_height="40dp"
  61.                 android:src="@drawable/rank_off"
  62.                 android:layout_gravity="center_horizontal"/>
  63.             <TextView
  64.                 android:id="@+id/txt_order"
  65.                 android:layout_width="wrap_content"
  66.                 android:layout_height="wrap_content"
  67.                 android:text="@string/txt_order"
  68.                 android:textSize="20dp"
  69.                 android:textStyle="bold"
  70.                 android:textColor="@color/color_txt_normal"/>
  72.         </LinearLayout>
  74.         <!--设置-->
  75.         <LinearLayout
  76.             android:id="@+id/llay_setting"
  77.             android:layout_width="0dp"
  78.             android:layout_height="match_parent"
  79.             android:layout_weight="1"
  80.             android:orientation="vertical"
  81.             android:gravity="center">
  82.             <ImageView
  83.                 android:id="@+id/img_setting"
  84.                 android:layout_width="40dp"
  85.                 android:layout_height="40dp"
  86.                 android:src="@drawable/setting_off"/>
  87.             <TextView
  88.                 android:id="@+id/txt_setting"
  89.                 android:layout_width="wrap_content"
  90.                 android:layout_height="wrap_content"
  91.                 android:text="@string/txt_setting"
  92.                 android:textSize="20dp"
  93.                 android:textStyle="bold"
  94.                 android:textColor="@color/color_txt_normal"/>
  95.         </LinearLayout>
  96.     </LinearLayout>
  98.     <FrameLayout
  99.         android:id="@+id/fragment_content"
  100.         android:layout_width="match_parent"
  101.         android:layout_height="match_parent"
  102.         android:layout_above="@id/linearLayout"
  103.         android:layout_alignParentLeft="true"
  104.         android:layout_alignParentStart="true"/>
  106. </RelativeLayout>

布局中涉及的“strings.xml”文件如下：

  1. <string name="txt_guess">猜数</string>
  2.     <string name="txt_order">排行榜</string>
  3.     <string name="txt_setting">设置</string>

布局中涉及的“colors.xml”文件如下：

  1. <color name="color_txt_normal">#737373</color>
  2.     <color name="color_txt_pressed">#d4257b</color>

在MainActivity中实现导航逻辑之前，先搭个基本页面框架：
新建GuessFragment（猜数字页）、OrderFragment（积分排行榜页）和SettingFragment（设置页）3个类，以及对应的布局文件“fragment_guess.xml”、“fragment_order.xml”和“fragment_setting.xml”。
在MainActivity中的代码如下：

  1. package com.example.mygame;
  4. import android.support.v4.app.Fragment;
  5. import android.support.v4.app.FragmentManager;
  6. import android.support.v4.app.FragmentTransaction;
  7. import android.support.v4.content.ContextCompat;
  8. import android.support.v7.app.AppCompatActivity;
  9. import android.os.Bundle;
  10. import android.view.View;
  11. import android.widget.ImageView;
  12. import android.widget.LinearLayout;
  13. import android.widget.TextView;
  16. public class MainActivity extends AppCompatActivity {
  18.     private LinearLayout ILay_guess,ILay_order,ILay_setting;
  19.     private ImageView img_guess,img_order,img_setting;
  20.     private TextView txt_guess,txt_order,txt_setting;
  21.     private Fragment fm_guess,fm_order,fm_setting;
  23.     @Override
  24.     protected void onCreate(Bundle savedInstanceState) {
  26.         super.onCreate(savedInstanceState);
  27.         setContentView(R.layout.activity_main);
  28.         initView();
  29.         setDefaultFragment();
  30.         setOnClickLisener();
  31.     }
  33.     private void initView(){
  35.         ILay_guess = findViewById(R.id.llay_guess);
  36.         ILay_order = findViewById(R.id.llay_order);
  37.         ILay_setting = findViewById(R.id.llay_setting);
  39.         img_guess = findViewById(R.id.img_guess);
  40.         img_order = findViewById(R.id.img_order);
  41.         img_setting = findViewById(R.id.img_setting);
  43.         txt_guess = findViewById(R.id.txt_guess);
  44.         txt_order = findViewById(R.id.txt_order);
  45.         txt_setting = findViewById(R.id.txt_setting);
  46.     }
  48.     private void setDefaultFragment(){
  50.         FragmentManager fm = getSupportFragmentManager();
  51.         FragmentTransaction transaction = fm.beginTransaction();
  52.         fm_guess = new GuessFragment();
  53.         transaction.replace(R.id.fragment_content,fm_guess,"GUESS");
  54.         transaction.commit();
  55.     }
  56.     private void setOnClickLisener(){
  58.         ILay_guess.setOnClickListener(new LinearLayoutOnClickLisener());
  59.         ILay_order.setOnClickListener(new LinearLayoutOnClickLisener());
  60.         ILay_setting.setOnClickListener(new LinearLayoutOnClickLisener());
  61.     }
  63.     private class LinearLayoutOnClickLisener implements View.OnClickListener{
  66.         @Override
  67.         public void onClick(View v) {
  69.             FragmentManager fm = getSupportFragmentManager();
  70.             FragmentTransaction transaction = fm.beginTransaction();
  71.             resetLinearLayout();
  72.             switch (v.getId()){
  74.                 case R.id.llay_guess:
  75.                     if (fm_guess == null){
  77.                         fm_guess = new  GuessFragment();
  78.                     }
  79.                     img_guess.setImageResource(R.drawable.game_on);
  80.                     txt_guess.setTextColor(ContextCompat.getColor(MainActivity.this,R.color.color_txt_pressed));
  81.                     transaction.replace(R.id.fragment_content,fm_guess,"GUESS");
  82.                     break;
  83.                 case R.id.llay_order:
  84.                     if (fm_order == null){
  86.                         fm_order = new OrderFragment();
  87.                     }
  88.                     img_order.setImageResource(R.drawable.rank_on);
  89.                     txt_order.setTextColor(ContextCompat.getColor(MainActivity.this,R.color.color_txt_pressed));
  90.                     transaction.replace(R.id.fragment_content,fm_order,"ORDER");
  91.                     break;
  92.                 case R.id.llay_setting:
  93.                     if (fm_setting == null){
  95.                         fm_setting = new SettingFragment();
  96.                     }
  97.                     img_setting.setImageResource(R.drawable.setting_on);
  98.                     txt_setting.setTextColor(ContextCompat.getColor(MainActivity.this,R.color.color_txt_pressed));
  99.                     transaction.replace(R.id.fragment_content,fm_setting,"SETTING");
  100.                     break;
  101.             }
  102.             transaction.commit();
  103.         }
  104.     }
  106.     private void resetLinearLayout(){
  108.         img_guess.setImageResource(R.drawable.game_off);
  109.         img_order.setImageResource(R.drawable.rank_off);
  110.         img_setting.setImageResource(R.drawable.setting_off);
  112.         txt_guess.setTextColor(ContextCompat.getColor(MainActivity.this,R.color.color_txt_normal));
  113.         txt_order.setTextColor(ContextCompat.getColor(MainActivity.this,R.color.color_txt_normal));
  114.         txt_setting.setTextColor(ContextCompat.getColor(MainActivity.this,R.color.color_txt_normal));
  115.     }
  117. }

【“设置”模块的实现】
在对应的布局文件“fragment_setting.xml”中，代码布局如下：

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:app="http://schemas.android.com/apk/res-auto"
  4.     xmlns:tools="http://schemas.android.com/tools"
  5.     android:layout_width="match_parent"
  6.     android:layout_height="match_parent"
  7.     tools:context=".SettingFragment"
  8.     android:orientation="vertical">
  10.     <TextView
  11.         android:id="@+id/txt_name"
  12.         android:layout_width="match_parent"
  13.         android:layout_height="wrap_content"
  14.         android:text="@string/txt_name"
  15.         android:textSize="22dp"/>
  16.     <EditText
  17.         android:id="@+id/edit_defaultName"
  18.         android:layout_width="match_parent"
  19.         android:layout_height="wrap_content"
  20.         android:layout_marginTop="10dp"
  21.         android:padding="8dp"
  22.         android:hint="@string/edit_name"
  23.         android:textSize="22dp" />
  24.     <CheckBox
  25.         android:id="@+id/chb_name"
  26.         android:layout_width="wrap_content"
  27.         android:layout_height="wrap_content"
  28.         android:layout_marginTop="10dp"
  29.         android:text="@string/chb_useDefaultName"
  30.         android:textSize="22dp"
  31.         />
  33.     <TextView
  34.         android:id="@+id/txt_defaultRange"
  35.         android:layout_width="wrap_content"
  36.         android:layout_height="wrap_content"
  37.         android:layout_marginTop="10dp"
  38.         android:text="@string/txt_defaultRange"
  39.         android:textSize="22dp"/>
  41.     <Spinner
  42.         android:id="@+id/spinner"
  43.         android:layout_width="match_parent"
  44.         android:layout_height="wrap_content"
  45.         android:entries="@array/range_array"
  46.         android:layout_marginTop="10dp"/>
  48.     <Button
  49.         android:id="@+id/btn_save"
  50.         android:layout_width="match_parent"
  51.         android:layout_height="wrap_content"
  52.         android:layout_marginTop="10dp"
  53.         android:text="@string/btn_setting"
  54.         android:textSize="22dp"/>
  55. </LinearLayout>

布局文件中涉及的“strings.xml”文件内容如下：

  1. <string name="txt_name">请输入默认姓名:</string>
  2.     <string name="chb_useDefaultName">使用默认姓名:</string>
  3.     <string name="txt_defaultRange">默认范围:</string>
  4.     <string name="btn_setting">保存设置</string>
  5.     <string name="edit_name">默认姓名</string>
  7.     <string-array name="range_array">
  8.         <item>100</item>
  9.         <item>1000</item>
  10.         <item>10000</item>
  11.     </string-array>

该模块的逻辑实现代码在“SettingFragment”类中实现：

  1. package com.example.mygame;
  3. import android.content.Context;
  4. import android.content.SharedPreferences;
  5. import android.support.v4.app.Fragment;
  6. import android.os.Bundle;
  7. import android.view.LayoutInflater;
  8. import android.view.View;
  9. import android.view.ViewGroup;
  10. import android.widget.Button;
  11. import android.widget.CheckBox;
  12. import android.widget.EditText;
  13. import android.widget.Spinner;
  14. import android.widget.Toast;
  16. public class SettingFragment extends Fragment{
  18.     private EditText edit_name;
  19.     private Button btn_save;
  20.     private CheckBox chb_defaultName;
  21.     private Spinner spinner;
  22.     private Context context;
  24.     @Override
  25.     public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState){
  27.         View view = inflater.inflate(R.layout.fragment_setting,container,false);
  28.         context = view.getContext();
  29.         initView(view);
  30.         btn_save.setOnClickListener(new ButtonOnClickLisener());
  31.         return view;
  32.     }
  34.     private void initView(View view){
  36.         edit_name = view.findViewById(R.id.edit_defaultName);
  37.         btn_save = view.findViewById(R.id.btn_save);
  38.         chb_defaultName = view.findViewById(R.id.chb_name);
  39.         spinner = view.findViewById(R.id.spinner);
  40.     }
  42.     public class ButtonOnClickLisener implements View.OnClickListener{
  45.         @Override
  46.         public void onClick(View v) {
  48.             SharedPreferences sharedPreferences = context.getSharedPreferences("Info",Context.MODE_PRIVATE);
  49.             SharedPreferences.Editor editor = sharedPreferences.edit();
  50.             int defaultRange = Integer.valueOf(spinner.getSelectedItem().toString());
  51.             editor.putInt("range",defaultRange);
  52.             if (chb_defaultName.isChecked()){
  54.                 String defaultName = edit_name.getText().toString();
  55.                 if (defaultName.isEmpty()){
  57.                     Toast.makeText(context,"请输入默认姓名！",Toast.LENGTH_SHORT).show();
  58.                     return;
  59.                 }
  60.                 editor.putString("name",defaultName);
  62.             }
  63.             else {
  65.                 editor.remove("name");
  66.             }
  67.             if (editor.commit()){
  69.                 Toast.makeText(context,"保存成功！",Toast.LENGTH_SHORT).show();
  70.             }
  71.         }
  72.     }
  73. }

完成可执行run，在模拟器跑一下。
【“猜数”模块的实现】
猜数模块布局文件”fragment_guess.xml”内容如下：

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:app="http://schemas.android.com/apk/res-auto"
  4.     xmlns:tools="http://schemas.android.com/tools"
  5.     android:layout_width="match_parent"
  6.     android:layout_height="match_parent"
  7.     tools:context=".GuessFragment"
  8.     android:background="#ffffff"
  9.     android:orientation="vertical">
  10.     <TextView
  11.         android:id="@+id/txt_range"
  12.         android:layout_width="wrap_content"
  13.         android:layout_height="wrap_content"
  14.         android:layout_margin="5dp"
  15.         android:textSize="22dp"/>
  17.     <EditText
  18.         android:id="@+id/edit_num"
  19.         android:layout_width="match_parent"
  20.         android:layout_height="wrap_content"
  21.         android:layout_marginTop="10dp"
  22.         android:layout_below="@id/txt_range"
  23.         android:padding="8dp"
  24.         android:inputType="numberSigned"
  25.         android:textSize="22dp"/>
  27.     <Button
  28.         android:id="@+id/btn_submit"
  29.         android:layout_width="match_parent"
  30.         android:layout_height="wrap_content"
  31.         android:layout_marginTop="10dp"
  32.         android:layout_below="@id/edit_num"
  33.         android:textSize="22dp"/>
  35.     <TextView
  36.         android:id="@+id/txt_compare"
  37.         android:layout_width="wrap_content"
  38.         android:layout_height="wrap_content"
  39.         android:layout_marginTop="10dp"
  40.         android:textSize="22dp"
  41.         android:layout_below="@id/btn_submit"
  42.         android:layout_centerHorizontal="true"/>
  44.     <ImageView
  45.         android:id="@+id/img_broad"
  46.         android:layout_width="60dp"
  47.         android:layout_height="60dp"
  48.         android:layout_margin="10dp"
  49.         android:layout_toStartOf="@id/txt_compare"
  50.         android:layout_toLeftOf="@id/txt_compare"
  51.         android:layout_below="@id/btn_submit"/>
  53.     <TextView
  54.         android:id="@+id/txt_count"
  55.         android:layout_width="wrap_content"
  56.         android:layout_height="wrap_content"
  57.         android:layout_marginTop="10dp"
  58.         android:textSize="22dp"
  59.         android:layout_below="@id/txt_compare"
  60.         android:layout_alignLeft="@id/txt_compare"
  61.         android:layout_alignStart="@id/txt_compare"
  62.         />
  63.     <ImageView
  64.         android:id="@+id/img_bingo"
  65.         android:layout_width="wrap_content"
  66.         android:layout_height="wrap_content"
  67.         android:layout_below="@id/img_broad"
  68.         android:layout_centerHorizontal="true"
  69.         android:layout_marginTop="10dp"
  70.         android:src="@drawable/bingo"/>
  71. </RelativeLayout>

在GuessFragment类中实现猜数判断逻辑：

  1. package com.example.mygame;
  3. import android.content.ContentValues;
  4. import android.content.Context;
  5. import android.content.SharedPreferences;
  6. import android.database.sqlite.SQLiteDatabase;
  7. import android.support.v4.app.Fragment;
  8. import android.support.v7.app.AppCompatActivity;
  9. import android.os.Bundle;
  10. import android.view.LayoutInflater;
  11. import android.view.View;
  12. import android.view.ViewGroup;
  13. import android.widget.Button;
  14. import android.widget.EditText;
  15. import android.widget.ImageView;
  16. import android.widget.TextView;
  17. import android.widget.Toast;
  19. import java.util.Random;
  21. public class GuessFragment extends Fragment {
  23.     private int count,rndNum;
  24.     private EditText edit_num;
  25.     private TextView txt_range,txt_compare,txt_count;
  26.     private Button btn_submit;
  27.     private ImageView img_broad,img_bingo;
  28.     private boolean flag;
  29.     private String name;
  30.     public int range = 0;
  31.     private Context context;
  33.     @Override
  34.     public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState){
  36.         View view = inflater.inflate(R.layout.fragment_guess,container,false);
  37.         context = view.getContext();
  38.         initView(view);
  39.         initData();
  40.         btn_submit.setOnClickListener(new ButtonOnClickLisener());
  41.         return view;
  42.     }
  44.     private void initView(View view){
  46.         edit_num = view.findViewById(R.id.edit_num);
  47.         txt_range = view.findViewById(R.id.txt_range);
  48.         txt_compare = view.findViewById(R.id.txt_compare);
  49.         txt_count = view.findViewById(R.id.txt_count);
  51.         btn_submit = view.findViewById(R.id.btn_submit);
  53.         img_broad = view.findViewById(R.id.img_broad);
  54.         img_bingo = view.findViewById(R.id.img_bingo);
  55.     }
  56.     public void initData(){
  58.         SharedPreferences sharedPreferences = context.getSharedPreferences("Info",Context.MODE_PRIVATE);
  59.         name = sharedPreferences.getString("name","");
  60.         range = sharedPreferences.getInt("range",100);
  61.         Random mRandom = new Random();
  62.         rndNum = mRandom.nextInt(range)+1;
  64.         txt_range.setText("请输入1-"+range+"之间的整数");
  65.         txt_count.setText("");
  66.         txt_compare.setText("");
  68.         img_broad.setVisibility(View.INVISIBLE);
  69.         img_bingo.setVisibility(View.INVISIBLE);
  71.         btn_submit.setText("提交");
  72.         flag = true;
  73.         count = 0;
  74.     }
  76.     private class ButtonOnClickLisener implements View.OnClickListener{
  78.         @Override
  79.         public void onClick(View v) {
  81.             if (flag){
  83.                 String str_num = edit_num.getText().toString();
  84.                 if (str_num.isEmpty()){
  87.                     Toast.makeText(context,"请输入数字！",Toast.LENGTH_SHORT).show();
  88.                     return;
  89.                 }
  90.                 edit_num.setText("");
  91.                 int numInput = Integer.valueOf(str_num);
  92.                 if (numInput<1 || numInput > range){
  94.                     Toast.makeText(context,"请输入范围内的数字！",Toast.LENGTH_SHORT).show();
  95.                     return;
  96.                 }
  97.                 count += 1;
  98.                 img_broad.setVisibility(View.VISIBLE);
  99.                 txt_count.setText("猜数次数："+count);
  101.                 if (numInput > rndNum){
  103.                     txt_compare.setText("输入的"+str_num+"太大了！");
  104.                 }else if(numInput < rndNum){
  106.                     txt_compare.setText("输入的"+str_num+"太小了！");
  107.                 }else{
  109.                     txt_compare.setText("恭喜你猜对啦！正确答案是："+rndNum+"!");
  110.                     img_bingo.setVisibility(View.VISIBLE);
  111.                     flag = false;
  112.                     btn_submit.setText("再猜一次");
  114.                     if (name.isEmpty()){
  116.                         final CustomDialog dialog = new CustomDialog(context,R.style.MyDialog);
  117.                         dialog.show();
  118.                         Button btn_confirm = dialog.findViewById(R.id.btn_confirm);
  119.                         final  EditText edit_name = dialog.findViewById(R.id.edit_inputName);
  120.                         btn_confirm.setOnClickListener(new View.OnClickListener() {
  122.                             @Override
  123.                             public void onClick(View v) {
  125.                                 name = edit_name.getText().toString();
  126.                                 if (!name.isEmpty()){
  128.                                     insertData();
  129.                                     dialog.dismiss();
  130.                                 }
  131.                             }
  132.                         });
  133.                     } else {
  135.                         insertData();
  136.                     }
  137.                 }
  138.             }else {
  140.                 initData();
  141.             }
  142.         }
  144.     }
  146.     private void insertData(){
  148.         MyHelper helper = new MyHelper(context,"Guess.db",null,1);
  149.         SQLiteDatabase db = helper.getWritableDatabase();
  150.         ContentValues values = new ContentValues();
  151.         values.put("name",name);
  152.         values.put("count",count);
  153.         values.put("range",range);
  154.         db.insert("ordertb",null,values);
  155.         db.close();
  156.     }
  158. }

可以发现，在GuessFragment类中，引入了CustomDialog类，这是自定义的对话框，用于前面基本构思说的，用户在进行猜数游戏时，如果在设置页中，不选择使用默认姓名的话，游戏结束会要求用户输入用户名。
CustomDialog自定义对话框的具体实现如下：
布局文件“alertdialog_input.xml”:

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:orientation="vertical" android:layout_width="match_parent"
  4.     android:layout_height="match_parent"
  5.     android:gravity="center_horizontal"
  6.     android:background="#80BCF7"
  7.     android:padding="20dp">
  8.     <TextView
  9.         android:id="@+id/txt_info"
  10.         android:layout_width="match_parent"
  11.         android:layout_height="50dp"
  12.         android:layout_marginTop="5dp"
  13.         android:gravity="center"
  14.         android:text="@string/txt_dialog_info"
  15.         android:textSize="22dp"
  16.         android:textColor="#ffffff"
  17.         />
  19.     <EditText
  20.         android:id="@+id/edit_inputName"
  21.         android:layout_width="match_parent"
  22.         android:layout_height="wrap_content"
  23.         android:textSize="20dp"
  24.         android:padding="8dp"/>
  26.     <Button
  27.         android:id="@+id/btn_confirm"
  28.         android:layout_width="match_parent"
  29.         android:layout_height="wrap_content"
  30.         android:text="@string/btn_dialog_confirm"
  31.         android:textSize="20dp"/>
  32. </LinearLayout>

布局文件中涉及到的“strings.xml”文件内容如下：

  1. <string name="txt_dialog_info">请输入姓名</string>
  2.     <string name="btn_dialog_confirm">确定</string>

CustomDialog类实现代码：

  1. package com.example.mygame;
  4. import android.app.Dialog;
  5. import android.content.Context;
  6. import android.os.Bundle;
  7. import android.view.Gravity;
  8. import android.view.WindowManager;
  10. public class CustomDialog extends Dialog {
  13.     private Context context;
  15.     public CustomDialog(Context context,int themeResId) {
  17.         super(context,themeResId);
  18.         this.context = context;
  19.     }
  21.     @Override
  22.     protected void onCreate(Bundle savedInstanceState){
  24.         super.onCreate(savedInstanceState);
  25.         this.setContentView(R.layout.alertdialog_input);
  26.     }
  28.     @Override
  29.     public void show(){
  31.         super.show();
  32. //        设置对话框宽度、对齐方式等
  33.         WindowManager.LayoutParams layoutParams = getWindow().getAttributes();
  34.         layoutParams.gravity = Gravity.CENTER;
  35.         layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
  36.         layoutParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
  37. //        getWindow().getDecorView().setPadding(0,0,0,0);
  38.         getWindow().setAttributes(layoutParams);
  40.     }
  41. }

【“排行榜”模块的实现】
该模块布局文件“fragment_order.xml””内容如下：

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:tools="http://schemas.android.com/tools"
  4.     android:layout_width="match_parent"
  5.     android:layout_height="match_parent"
  6.     tools:context=".OrderFragment">
  8.     <android.support.v4.view.ViewPager
  9.         android:id="@+id/viewpager"
  10.         android:layout_width="match_parent"
  11.         android:layout_height="wrap_content"
  12.         >
  13.         <android.support.v4.view.PagerTabStrip
  14.             android:id="@+id/tabstrip"
  15.             android:layout_width="match_parent"
  16.             android:layout_height="wrap_content"/>
  18.     </android.support.v4.view.ViewPager>
  20. </RelativeLayout>

新建“viewpager_tab_hundred.xml”布局文件（用于在排行榜页中显示排名，也可以多建几个同样的文件，在排行榜实现分页显示不同范围的猜数游戏有不同的排行榜，这里只在一页显示全部）：

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     android:orientation="vertical" android:layout_width="match_parent"
  4.     android:layout_height="match_parent">
  6.     <ListView
  7.         android:id="@+id/lv_hundred"
  8.         android:layout_width="match_parent"
  9.         android:layout_height="wrap_content"
  10.         >
  12.     </ListView>
  13. </LinearLayout>

OrderFragment类逻辑代码实现：

  1. package com.example.mygame;
  3. import android.content.Context;
  4. import android.database.Cursor;
  5. import android.database.sqlite.SQLiteDatabase;
  6. import android.graphics.Color;
  7. import android.support.annotation.NonNull;
  8. import android.support.v4.app.Fragment;
  9. import android.support.v4.view.PagerAdapter;
  10. import android.support.v4.view.PagerTabStrip;
  11. import android.support.v4.view.ViewPager;
  12. import android.os.Bundle;
  13. import android.util.Log;
  14. import android.view.LayoutInflater;
  15. import android.view.View;
  16. import android.view.ViewGroup;
  17. import android.widget.ArrayAdapter;
  18. import android.widget.ListView;
  20. import java.util.ArrayList;
  22. public class OrderFragment extends Fragment {
  24.     private ListView lv_hunderd,lv_thousand,lv_tenthousand;
  25.     private ViewPager pager;
  26.     private Context context;
  27.     private PagerTabStrip tabStrip;
  28.     private ArrayList<View> viewContainer;
  29.     private ArrayList<String> titleContainer;
  30.     private ArrayList<String>[] data;     //用于为每个pager的ListView准备数据
  32.     @Override
  33.     public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState){
  35.         View view = inflater.inflate(R.layout.fragment_order,container,false);
  36.         context = view.getContext();
  37.         initView(view);
  38.         pagersetAdapter();
  39.         return view;
  40.     }
  42.     private void initData(){
  44.         MyHelper helper = new MyHelper(context,"Guess.db",null,1);
  45.         SQLiteDatabase db = helper.getReadableDatabase();
  46.         int[] ranges = {
  47.     100,1000,1000};
  48.         data = new ArrayList[3];
  49.         data[0] = new ArrayList<>();
  50.         data[1] = new ArrayList<>();
  51.         data[2] = new ArrayList<>();
  53.         for (int i = 0; i < 3; i++) {
  56.             Cursor c = db.query("ordertb",null,null,null
  57.                     ,null,null,"count");
  58.             if (c.getCount()>0){
  60.                 while (c.moveToNext()){
  62.                     data[i].add("姓名："+c.getString(c.getColumnIndex("name"))+"\t\t花费次数: "+
  63.                             c.getString(c.getColumnIndex("count")));
  64.                 }
  65.             }else {
  67.                 Log.i("info","数据库无数据");
  68.             }
  69.             c.close();
  70.         }
  71.         db.close();
  72.     }
  74.     private void initListView(){
  76.         ArrayAdapter<String> adapter_hundred = new ArrayAdapter<String>(context,android.R.layout.simple_expandable_list_item_1,data[0]);
  77.         lv_hunderd.setAdapter(adapter_hundred);
  79.         ArrayAdapter<String> adapter_thousand = new ArrayAdapter<String>(context,android.R.layout.simple_expandable_list_item_1,data[1]);
  80.         lv_hunderd.setAdapter(adapter_thousand);
  82.         ArrayAdapter<String> adapter_tenthousand = new ArrayAdapter<String>(context,android.R.layout.simple_expandable_list_item_1,data[2]);
  83.         lv_hunderd.setAdapter(adapter_tenthousand);
  84.     }
  86.     private void initView(View view){
  88.         pager = view.findViewById(R.id.viewpager);
  89.         tabStrip = view.findViewById(R.id.tabstrip);
  90.         tabStrip.setDrawFullUnderline(false);
  91.         tabStrip.setBackgroundColor(Color.parseColor("#ccccff"));
  92.         tabStrip.setTabIndicatorColor(Color.parseColor("#6666ff"));
  94.         LayoutInflater inflater = getActivity().getLayoutInflater();
  95.         View view_tab1 = inflater.inflate(R.layout.viewpager_tab_hundred,null);
  96. //        View view_tab2 = inflater.inflate(R.layout.viewpager_tab_thousand,null);
  97. //        View view_tab3 = inflater.inflate(R.layout.viewpager_tab_tenthousand,null);
  99.         lv_hunderd = view_tab1.findViewById(R.id.lv_hundred);
  100. //        lv_thousand = view_tab2.findViewById(R.id.lv_thousand);
  101. //        lv_tenthousand = view_tab3.findViewById(R.id.lv_tenthousand);
  103.         initData();
  104.         initListView();
  105. //        添加到ViewPager
  106.         viewContainer = new ArrayList<>();
  107.         viewContainer.add(view_tab1);
  108. //        viewContainer.add(view_tab2);
  109. //        viewContainer.add(view_tab3);
  111. //        设置标题
  112.         titleContainer = new ArrayList<>();
  113.         titleContainer.add("排行榜");
  114. //        titleContainer.add("1-1000排行榜");
  115. //        titleContainer.add("1-10000排行榜");
  116.     }
  118.     private void pagersetAdapter(){
  120.         pager.setAdapter(new PagerAdapter() {
  122.             @Override
  123.             public int getCount() {
  125.                 return viewContainer.size();
  126.             }
  128.             @Override
  129.             public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
  131.                 return view == object;
  132.             }
  134.             @Override
  135.             public void destroyItem(ViewGroup container,int position,Object object){
  137.                 ((ViewPager)container).removeView(viewContainer.get(position));
  138.             }
  140.             @Override
  141.             public Object instantiateItem(ViewGroup container,int position){
  143.                 ((ViewPager)container).addView(viewContainer.get(position));
  144.                 return viewContainer.get(position);
  145.             }
  147.             @Override
  148.             public int getItemPosition(Object object){
  150.                 return super.getItemPosition(object);
  151.             }
  153.             @Override
  154.             public CharSequence getPageTitle(int position){
  156.                 return titleContainer.get(position);
  157.             }
  158.         });
  159.     }
  160. }

到这里，猜数页，猜数页填写用户名的对话框，排行榜，设置页都已经实现了。整个工程也基本完结了。

作者：唐玉金

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