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

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="登录"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

2、加法器布局设计activity_computer1.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
   >

    <LinearLayout
        android:layout_width="437dp"
        android:layout_height="72dp"
        android:orientation="horizontal"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <EditText
            android:id="@+id/j1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:gravity="center"
            android:hint="加法1"
            android:inputType="textPersonName"
            android:textSize="34sp" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="+"
            android:textSize="34sp" />

        <EditText
            android:id="@+id/j2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:gravity="center"
            android:hint="加法2"
            android:inputType="textPersonName"
            android:textSize="34sp" />

    </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

3、第二页面跳转界面布局activity_main2.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/p2"
    tools:context=".Main2Activity">

    <Button
        android:id="@+id/bt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="164dp"
        android:onClick="btonClick"
        android:text="返回"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.535"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

4、用户登录对话框界面qq.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="444dp"
        android:layout_height="110dp"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/textView2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:gravity="center"
                android:text="用户名："
                android:textSize="34sp" />

            <EditText
                android:id="@+id/user"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="textPersonName"
                android:textSize="20sp" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <TextView
                android:id="@+id/textView3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:gravity="center"
                android:text="密 码  ："
                android:textSize="34sp" />

            <EditText
                android:id="@+id/pwd"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:ems="10"
                android:inputType="textPassword" />
        </LinearLayout>
    </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

三、功能实现

1、MainActivity.java

package com.example.computer;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.app.DatePickerDialog;
import android.app.ProgressDialog;
import android.app.TimePickerDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
Button btn;//QQ登录界面
int sum=0;//加法器求和
int count = 0;//进度条进程初始值为0
ProgressDialog d;//全局声明进度条对话框
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn=findViewById(R.id.btn);
        btn.setOnClickListener(this);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
       getMenuInflater().inflate(R.menu.optionsmenu,menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        switch (item.getItemId()){
            //选项菜单1（计算器）功能实现
           case  R.id.jfq:
               AlertDialog.Builder builder=new AlertDialog.Builder(this);
               builder.setTitle("加法器对话框：");
               builder.setIcon(R.drawable.ic_launcher_background);
               builder.setMessage("请填写加法器基本信息");
               final View jiafaqi = getLayoutInflater().inflate(R.layout.activity_computer1, null);
               builder.create();
               builder.setView(jiafaqi);

               builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                   @Override
                   public void onClick(DialogInterface dialog, int which) {
                       EditText jia1=jiafaqi.findViewById(R.id.j1);
                       EditText jia2=jiafaqi.findViewById(R.id.j2);
                       String j1=jia1.getText().toString();
                       String j2=jia2.getText().toString();
                       int sum1=Integer.valueOf(j1).intValue();
                       int sum2=Integer.valueOf(j2).intValue();
                       sum=sum1+sum2;
                       j1=String.valueOf(sum);

                       Toast.makeText(MainActivity.this, j1, Toast.LENGTH_SHORT).show();

                   }
               });

               builder.setNegativeButton("取消",null);
               builder.show();
           break;




            //切换布局
            case R.id.qiehuan:
                Intent intent=new Intent(MainActivity.this,Main2Activity.class);
                startActivity(intent);break;






            //实现进度条对话框
            case  R.id.progress:
                //实例化进度条对话框
                d=new ProgressDialog(MainActivity.this);
                d.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);//设置进度条对话框样式：长方形
                d.setTitle("进度条对话框"); //设置进度条对话框的标题
                d.setMessage("程序正在等待中……");//设置进度条对话框的信息内容
                d.setMax(100);//设置进度条对话框的进程最大值为100
                d.setIcon(R.drawable.ic_launcher_background);


                d.setIndeterminate(false);// 设置进度条对话框是否可以按退回键取消
                d.setCancelable(true);//设置进度条对话框按返回键取消
                d.show();//显示进度条对话框


    //进度条进程实现参考博客：https://www.cnblogs.com/94cool/p/3231797.html
              new  Thread(){   //新建进程方法
                  @Override
                  public void run(){  //进程运行方法
                      try {   //try抓取异常 将执行进度条进程直到加载满为止
                          while(count<=100){
                              //由线程来控制进度
                              d.setProgress(count++);//进度条进度不断增加
                              Thread.sleep(100);//直到进度条进程达到100终止

                          }

//                          d.dismiss();//取消进度 还可以用d.cancel()方法表示取消

                      }


                      catch (Exception e) {   //catch进程没有异常直接取消
                         d.dismiss();      //取消进度 还可以用d.cancel()方法表示取消

                      }
                      //进度条对话框运行完后跳转到第二个activity页面
//                      Toast.makeText(MainActivity.this, "恭喜您运行成功", Toast.LENGTH_SHORT).show();
                      Intent intent1=new Intent(MainActivity.this,Main2Activity.class);
                      startActivity(intent1);
                  }

              } .start();
                break;







            //日期对话框
            case  R.id.data:
                Calendar ca=Calendar.getInstance();//实例化日历
                int year= ca.get(Calendar.YEAR);//得到日历中的年
                int month= ca.get(Calendar.MONTH);//得到日历中的月
                final int day= ca.get(Calendar.DAY_OF_MONTH);//得到日历中的日

                DatePickerDialog datePickerDialog=new DatePickerDialog(MainActivity.this, new DatePickerDialog.OnDateSetListener() {
                    @Override
                    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                        Toast.makeText(MainActivity.this, "当前日期："+year+"年"+(month+1)+"月"+day+"日", Toast.LENGTH_SHORT).show();
                    }
                }, year, month, day);

                datePickerDialog.show();//显示日期对话框

                break;

            //时间对话框
            case  R.id.time:
                Calendar ca2=Calendar.getInstance();//实例化日历
                 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）
                 int minute=ca2.get(Calendar.MINUTE);//得到日历中的分钟

                TimePickerDialog timePickerDialog=new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {
                    @Override
                    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                        Toast.makeText(MainActivity.this, "当前时间："+hour+":"+minute, Toast.LENGTH_SHORT).show();
                    }
                }, hour, minute, true);
                timePickerDialog.show();//显示时间对话框

                break;

                //普通对话框
            case R.id.pt:
                AlertDialog.Builder builder1=new AlertDialog.Builder(MainActivity.this);
                builder1.setTitle("普通对话框");
                builder1.setMessage("您确定要退出吗？");
                builder1.setIcon(R.drawable.ic_launcher_background);
                builder1.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Toast.makeText(MainActivity.this, "退出成功", Toast.LENGTH_SHORT).show();
                    }
                });
                builder1.setNegativeButton("取消",null);
                builder1.show();
                break;


        }
        return super.onOptionsItemSelected(item);
    }



//实例化QQ登录对话框
    @Override
    public void onClick(View v) {
        AlertDialog.Builder builder=new AlertDialog.Builder(MainActivity.this);
        builder.setTitle("用户登录");//QQ对话框标题设置
        builder.setIcon(R.drawable.ic_launcher_background);//QQ对话框图标设置
        builder.setMessage("请输入用户名或者密码");//QQ对话框内容信息设置
      final   View  QQ =getLayoutInflater().inflate(R.layout.qq,null);//孵化方法将QQ对话框布局设计导入
       builder.setView(QQ);//加载布局
       builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
           @Override
           public void onClick(DialogInterface dialog, int which) {
               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
               EditText Passworld=QQ.findViewById(R.id.pwd);//寻找孵化布局的QQ登录对话框中密码ID
               String name=username.getText().toString();
               String pwd=Passworld.getText().toString();
             if (name.equals("adf520")||pwd.equals("123")){
                 Toast.makeText(MainActivity.this, "恭喜您登录成功", Toast.LENGTH_SHORT).show();
             }
             else{
                 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();
             }
           }
       });

       builder.setNegativeButton("取消",null);
       builder.show();//显示QQ登录对话框


    }



}

2、Main2Activity.java

package com.example.computer;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class Main2Activity extends AppCompatActivity {
Button bt;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        bt=findViewById(R.id.bt);

    }

    public void btonClick(View view) {
        Intent intent=new Intent(Main2Activity.this,MainActivity.class);
        startActivity(intent);
    }
}

四、菜单布局文件

1、menu/optionmenu.xml选项菜单布局

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/jfq"
        android:title="加法器" />
    <item
        android:id="@+id/qiehuan"
        android:title="切换布局" />
    <item
        android:id="@+id/progress"
        android:title="进度条对话框" />
    <item
        android:id="@+id/time"
        android:title="时间对话框" />
    <item
        android:id="@+id/data"
        android:title="日期对话框" />
    <item
        android:id="@+id/pt"
        android:title="普通对话框" />
</menu>