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 "1.0" encoding="utf-8"?> 2"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
2、加法器布局设计activity_computer1.xml
1 "1.0" encoding="utf-8"?> 2"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 50
3、第二页面跳转界面布局activity_main2.xml
1 "1.0" encoding="utf-8"?> 2"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
4、用户登录对话框界面qq.xml
1 "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 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 64 65
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+"年"+(month+1)+"月"+day+"日", 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 "1.0" encoding="utf-8"?> 2