• Android复习对话框、菜单、加法器、进度条综合小练习


     

    Android复习对话框、菜单、加法器、进度条综合小练习

     

                     ————安德风QQ1652102745

     

    PS:本次练习简单介绍:本次练习通过选项菜单实现:

    ①普通对话框②自定义对话框③进度条对话框④时间对话框⑤日期对话框功能实现

     

     

    一、最终效果演示

     

     

    二、布局设计

    1、主界面布局设计Activity_main.xml

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <androidx.constraintlayout.widget.ConstraintLayout 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=".MainActivity">
     8 
     9     <Button
    10         android:id="@+id/btn"
    11         android:layout_width="wrap_content"
    12         android:layout_height="wrap_content"
    13         android:text="登录"
    14         app:layout_constraintBottom_toBottomOf="parent"
    15         app:layout_constraintEnd_toEndOf="parent"
    16         app:layout_constraintStart_toStartOf="parent"
    17         app:layout_constraintTop_toTopOf="parent" />
    18 
    19 </androidx.constraintlayout.widget.ConstraintLayout>

    2、加法器布局设计activity_computer1.xml

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <androidx.constraintlayout.widget.ConstraintLayout 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    >
     8 
     9     <LinearLayout
    10         android:layout_width="437dp"
    11         android:layout_height="72dp"
    12         android:orientation="horizontal"
    13         app:layout_constraintBottom_toBottomOf="parent"
    14         app:layout_constraintEnd_toEndOf="parent"
    15         app:layout_constraintStart_toStartOf="parent"
    16         app:layout_constraintTop_toTopOf="parent">
    17 
    18         <EditText
    19             android:id="@+id/j1"
    20             android:layout_width="0dp"
    21             android:layout_height="wrap_content"
    22             android:layout_weight="1"
    23             android:ems="10"
    24             android:gravity="center"
    25             android:hint="加法1"
    26             android:inputType="textPersonName"
    27             android:textSize="34sp" />
    28 
    29         <TextView
    30             android:id="@+id/textView2"
    31             android:layout_width="0dp"
    32             android:layout_height="wrap_content"
    33             android:layout_weight="1"
    34             android:gravity="center"
    35             android:text="+"
    36             android:textSize="34sp" />
    37 
    38         <EditText
    39             android:id="@+id/j2"
    40             android:layout_width="0dp"
    41             android:layout_height="wrap_content"
    42             android:layout_weight="1"
    43             android:ems="10"
    44             android:gravity="center"
    45             android:hint="加法2"
    46             android:inputType="textPersonName"
    47             android:textSize="34sp" />
    48 
    49     </LinearLayout>
    50 </androidx.constraintlayout.widget.ConstraintLayout>

    3、第二页面跳转界面布局activity_main2.xml

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <androidx.constraintlayout.widget.ConstraintLayout 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     android:background="@drawable/p2"
     8     tools:context=".Main2Activity">
     9 
    10     <Button
    11         android:id="@+id/bt"
    12         android:layout_width="wrap_content"
    13         android:layout_height="wrap_content"
    14         android:layout_marginTop="164dp"
    15         android:onClick="btonClick"
    16         android:text="返回"
    17         app:layout_constraintEnd_toEndOf="parent"
    18         app:layout_constraintHorizontal_bias="0.535"
    19         app:layout_constraintStart_toStartOf="parent"
    20         app:layout_constraintTop_toTopOf="parent" />
    21 </androidx.constraintlayout.widget.ConstraintLayout>

    4、用户登录对话框界面qq.xml

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <androidx.constraintlayout.widget.ConstraintLayout
     3     xmlns:android="http://schemas.android.com/apk/res/android"
     4     xmlns:app="http://schemas.android.com/apk/res-auto"
     5     xmlns:tools="http://schemas.android.com/tools"
     6     android:layout_width="match_parent"
     7     android:layout_height="match_parent">
     8 
     9     <LinearLayout
    10         android:layout_width="444dp"
    11         android:layout_height="110dp"
    12         android:orientation="vertical"
    13         app:layout_constraintBottom_toBottomOf="parent"
    14         app:layout_constraintEnd_toEndOf="parent"
    15         app:layout_constraintStart_toStartOf="parent"
    16         app:layout_constraintTop_toTopOf="parent">
    17 
    18         <LinearLayout
    19             android:layout_width="match_parent"
    20             android:layout_height="60dp"
    21             android:orientation="horizontal">
    22 
    23             <TextView
    24                 android:id="@+id/textView2"
    25                 android:layout_width="wrap_content"
    26                 android:layout_height="wrap_content"
    27                 android:layout_weight="1"
    28                 android:gravity="center"
    29                 android:text="用户名:"
    30                 android:textSize="34sp" />
    31 
    32             <EditText
    33                 android:id="@+id/user"
    34                 android:layout_width="wrap_content"
    35                 android:layout_height="wrap_content"
    36                 android:layout_weight="1"
    37                 android:ems="10"
    38                 android:inputType="textPersonName"
    39                 android:textSize="20sp" />
    40         </LinearLayout>
    41 
    42         <LinearLayout
    43             android:layout_width="match_parent"
    44             android:layout_height="wrap_content"
    45             android:orientation="horizontal">
    46 
    47             <TextView
    48                 android:id="@+id/textView3"
    49                 android:layout_width="wrap_content"
    50                 android:layout_height="wrap_content"
    51                 android:layout_weight="1"
    52                 android:gravity="center"
    53                 android:text="密 码  :"
    54                 android:textSize="34sp" />
    55 
    56             <EditText
    57                 android:id="@+id/pwd"
    58                 android:layout_width="wrap_content"
    59                 android:layout_height="wrap_content"
    60                 android:layout_weight="1"
    61                 android:ems="10"
    62                 android:inputType="textPassword" />
    63         </LinearLayout>
    64     </LinearLayout>
    65 </androidx.constraintlayout.widget.ConstraintLayout>

    三、功能实现

    1、MainActivity.java

      1 package com.example.computer;
      2 
      3 import androidx.annotation.NonNull;
      4 import androidx.appcompat.app.AlertDialog;
      5 import androidx.appcompat.app.AppCompatActivity;
      6 
      7 import android.app.DatePickerDialog;
      8 import android.app.ProgressDialog;
      9 import android.app.TimePickerDialog;
     10 import android.content.DialogInterface;
     11 import android.content.Intent;
     12 import android.os.Bundle;
     13 import android.view.Menu;
     14 import android.view.MenuInflater;
     15 import android.view.MenuItem;
     16 import android.view.View;
     17 import android.widget.Button;
     18 import android.widget.DatePicker;
     19 import android.widget.EditText;
     20 import android.widget.TextView;
     21 import android.widget.TimePicker;
     22 import android.widget.Toast;
     23 
     24 import java.util.Calendar;
     25 
     26 public class MainActivity extends AppCompatActivity implements View.OnClickListener {
     27 Button btn;//QQ登录界面
     28 int sum=0;//加法器求和
     29 int count = 0;//进度条进程初始值为0
     30 ProgressDialog d;//全局声明进度条对话框
     31     @Override
     32     protected void onCreate(Bundle savedInstanceState) {
     33         super.onCreate(savedInstanceState);
     34         setContentView(R.layout.activity_main);
     35         btn=findViewById(R.id.btn);
     36         btn.setOnClickListener(this);
     37 
     38     }
     39 
     40     @Override
     41     public boolean onCreateOptionsMenu(Menu menu) {
     42        getMenuInflater().inflate(R.menu.optionsmenu,menu);
     43         return true;
     44     }
     45 
     46     @Override
     47     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
     48         switch (item.getItemId()){
     49             //选项菜单1(计算器)功能实现
     50            case  R.id.jfq:
     51                AlertDialog.Builder builder=new AlertDialog.Builder(this);
     52                builder.setTitle("加法器对话框:");
     53                builder.setIcon(R.drawable.ic_launcher_background);
     54                builder.setMessage("请填写加法器基本信息");
     55                final View jiafaqi = getLayoutInflater().inflate(R.layout.activity_computer1, null);
     56                builder.create();
     57                builder.setView(jiafaqi);
     58 
     59                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
     60                    @Override
     61                    public void onClick(DialogInterface dialog, int which) {
     62                        EditText jia1=jiafaqi.findViewById(R.id.j1);
     63                        EditText jia2=jiafaqi.findViewById(R.id.j2);
     64                        String j1=jia1.getText().toString();
     65                        String j2=jia2.getText().toString();
     66                        int sum1=Integer.valueOf(j1).intValue();
     67                        int sum2=Integer.valueOf(j2).intValue();
     68                        sum=sum1+sum2;
     69                        j1=String.valueOf(sum);
     70 
     71                        Toast.makeText(MainActivity.this, j1, Toast.LENGTH_SHORT).show();
     72 
     73                    }
     74                });
     75 
     76                builder.setNegativeButton("取消",null);
     77                builder.show();
     78            break;
     79 
     80 
     81 
     82 
     83             //切换布局
     84             case R.id.qiehuan:
     85                 Intent intent=new Intent(MainActivity.this,Main2Activity.class);
     86                 startActivity(intent);break;
     87 
     88 
     89 
     90 
     91 
     92 
     93             //实现进度条对话框
     94             case  R.id.progress:
     95                 //实例化进度条对话框
     96                 d=new ProgressDialog(MainActivity.this);
     97                 d.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);//设置进度条对话框样式:长方形
     98                 d.setTitle("进度条对话框"); //设置进度条对话框的标题
     99                 d.setMessage("程序正在等待中……");//设置进度条对话框的信息内容
    100                 d.setMax(100);//设置进度条对话框的进程最大值为100
    101                 d.setIcon(R.drawable.ic_launcher_background);
    102 
    103 
    104                 d.setIndeterminate(false);// 设置进度条对话框是否可以按退回键取消
    105                 d.setCancelable(true);//设置进度条对话框按返回键取消
    106                 d.show();//显示进度条对话框
    107 
    108 
    109     //进度条进程实现参考博客:https://www.cnblogs.com/94cool/p/3231797.html
    110               new  Thread(){   //新建进程方法
    111                   @Override
    112                   public void run(){  //进程运行方法
    113                       try {   //try抓取异常 将执行进度条进程直到加载满为止
    114                           while(count<=100){
    115                               //由线程来控制进度
    116                               d.setProgress(count++);//进度条进度不断增加
    117                               Thread.sleep(100);//直到进度条进程达到100终止
    118 
    119                           }
    120 
    121 //                          d.dismiss();//取消进度 还可以用d.cancel()方法表示取消
    122 
    123                       }
    124 
    125 
    126                       catch (Exception e) {   //catch进程没有异常直接取消
    127                          d.dismiss();      //取消进度 还可以用d.cancel()方法表示取消
    128 
    129                       }
    130                       //进度条对话框运行完后跳转到第二个activity页面
    131 //                      Toast.makeText(MainActivity.this, "恭喜您运行成功", Toast.LENGTH_SHORT).show();
    132                       Intent intent1=new Intent(MainActivity.this,Main2Activity.class);
    133                       startActivity(intent1);
    134                   }
    135 
    136               } .start();
    137                 break;
    138 
    139 
    140 
    141 
    142 
    143 
    144 
    145             //日期对话框
    146             case  R.id.data:
    147                 Calendar ca=Calendar.getInstance();//实例化日历
    148                 int year= ca.get(Calendar.YEAR);//得到日历中的年
    149                 int month= ca.get(Calendar.MONTH);//得到日历中的月
    150                 final int day= ca.get(Calendar.DAY_OF_MONTH);//得到日历中的日
    151 
    152                 DatePickerDialog datePickerDialog=new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {
    153                     @Override
    154                     public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
    155                         Toast.makeText(MainActivity.this, "当前日期:"+year+""+(month+1)+""+day+"", Toast.LENGTH_SHORT).show();
    156                     }
    157                 }, year, month, day);
    158 
    159                 datePickerDialog.show();//显示日期对话框
    160 
    161                 break;
    162 
    163             //时间对话框
    164             case  R.id.time:
    165                 Calendar ca2=Calendar.getInstance();//实例化日历
    166                  final int hour=ca2.get(Calendar.HOUR_OF_DAY);//得到日历中的小时(参数设置为:HOUR_OF_DAY 输出就是24进行时)
    167                  int minute=ca2.get(Calendar.MINUTE);//得到日历中的分钟
    168 
    169                 TimePickerDialog timePickerDialog=new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {
    170                     @Override
    171                     public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
    172                         Toast.makeText(MainActivity.this, "当前时间:"+hour+":"+minute, Toast.LENGTH_SHORT).show();
    173                     }
    174                 }, hour, minute, true);
    175                 timePickerDialog.show();//显示时间对话框
    176 
    177                 break;
    178 
    179                 //普通对话框
    180             case R.id.pt:
    181                 AlertDialog.Builder builder1=new AlertDialog.Builder(MainActivity.this);
    182                 builder1.setTitle("普通对话框");
    183                 builder1.setMessage("您确定要退出吗?");
    184                 builder1.setIcon(R.drawable.ic_launcher_background);
    185                 builder1.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    186                     @Override
    187                     public void onClick(DialogInterface dialog, int which) {
    188                         Toast.makeText(MainActivity.this, "退出成功", Toast.LENGTH_SHORT).show();
    189                     }
    190                 });
    191                 builder1.setNegativeButton("取消",null);
    192                 builder1.show();
    193                 break;
    194 
    195 
    196         }
    197         return super.onOptionsItemSelected(item);
    198     }
    199 
    200 
    201 
    202 //实例化QQ登录对话框
    203     @Override
    204     public void onClick(View v) {
    205         AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);
    206         builder.setTitle("用户登录");//QQ对话框标题设置
    207         builder.setIcon(R.drawable.ic_launcher_background);//QQ对话框图标设置
    208         builder.setMessage("请输入用户名或者密码");//QQ对话框内容信息设置
    209       final   View  QQ =getLayoutInflater().inflate(R.layout.qq,null);//孵化方法将QQ对话框布局设计导入
    210        builder.setView(QQ);//加载布局
    211        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
    212            @Override
    213            public void onClick(DialogInterface dialog, int which) {
    214                EditText username=QQ.findViewById(R.id.user);//寻找孵化布局的QQ登录对话框中用户名ID
    215                EditText Passworld=QQ.findViewById(R.id.pwd);//寻找孵化布局的QQ登录对话框中密码ID
    216                String name=username.getText().toString();
    217                String pwd=Passworld.getText().toString();
    218              if (name.equals("adf520")||pwd.equals("123")){
    219                  Toast.makeText(MainActivity.this, "恭喜您登录成功", Toast.LENGTH_SHORT).show();
    220              }
    221              else{
    222                  Toast.makeText(MainActivity.this, "抱歉,登录失败,请检查一下您的用户名或者密码", Toast.LENGTH_SHORT).show();
    223              }
    224            }
    225        });
    226 
    227        builder.setNegativeButton("取消",null);
    228        builder.show();//显示QQ登录对话框
    229 
    230 
    231     }
    232 
    233 
    234 
    235 }

    2、Main2Activity.java

     1 package com.example.computer;
     2 
     3 import androidx.appcompat.app.AppCompatActivity;
     4 
     5 import android.content.Intent;
     6 import android.os.Bundle;
     7 import android.view.View;
     8 import android.widget.Button;
     9 
    10 public class Main2Activity extends AppCompatActivity {
    11 Button bt;
    12     @Override
    13     protected void onCreate(Bundle savedInstanceState) {
    14         super.onCreate(savedInstanceState);
    15         setContentView(R.layout.activity_main2);
    16         bt=findViewById(R.id.bt);
    17 
    18     }
    19 
    20     public void btonClick(View view) {
    21         Intent intent=new Intent(Main2Activity.this,MainActivity.class);
    22         startActivity(intent);
    23     }
    24 }

    四、菜单布局文件

    1、menu/optionmenu.xml选项菜单布局

     1 <?xml version="1.0" encoding="utf-8"?>
     2 <menu xmlns:android="http://schemas.android.com/apk/res/android">
     3 
     4     <item
     5         android:id="@+id/jfq"
     6         android:title="加法器" />
     7     <item
     8         android:id="@+id/qiehuan"
     9         android:title="切换布局" />
    10     <item
    11         android:id="@+id/progress"
    12         android:title="进度条对话框" />
    13     <item
    14         android:id="@+id/time"
    15         android:title="时间对话框" />
    16     <item
    17         android:id="@+id/data"
    18         android:title="日期对话框" />
    19     <item
    20         android:id="@+id/pt"
    21         android:title="普通对话框" />
    22 </menu>
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  • 原文地址:https://www.cnblogs.com/adf520/p/12868480.html
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