常见控件（单选按钮，多选按钮，Spinner，对话框等）的添加与使用
话不多说，直接上源代码与截图
MainActivity.java
package com.example.calculator;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
import java.util.Stack;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_main);
}
public void myclick(View v){
switch (v.getId ()){
case R.id.btn_1:
showSingleDialog();
break;
case R.id.btn_2:
showMultiDialog();
break;
case R.id.btn_3:
showNormalDialog2();
break;
case R.id.btn_4:
showListDialog();
break;
case R.id.btn_5:
showWaitDialog();
break;
case R.id.btn_6:
showProgressDialog();
break;
case R.id.btn_7:
showNormalDialog1();
break;
}
}
private void showNormalDialog1() {
AlertDialog.Builder dialog = new AlertDialog.Builder (this);
dialog.setTitle ("警告！").setMessage ("此行为即将退出程序");
dialog.setPositiveButton ("确定", new DialogInterface.OnClickListener () {
@Override
public void onClick(DialogInterface dialog, int which) {
MainActivity.this.finish ();
}
});
dialog.setNegativeButton ("取消",null);
dialog.show ();
}
private void showNormalDialog2(){
AlertDialog dialog2 = new AlertDialog.Builder (this).create ();
dialog2.setTitle ("售后评价");
dialog2.setMessage ("本次的服务如何？");
dialog2.setButton (DialogInterface.BUTTON_POSITIVE, "好", new DialogInterface.OnClickListener () {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText (MainActivity.this,"好",Toast.LENGTH_LONG).show ();
}
});
dialog2.setButton (DialogInterface.BUTTON_NEGATIVE, "差", new DialogInterface.OnClickListener () {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText (MainActivity.this,"差",Toast.LENGTH_LONG).show ();
}
});
dialog2.show ();
}
private void showListDialog(){
final String[] items = {
"小朱","大朱"};
AlertDialog.Builder dialog3 = new AlertDialog.Builder (this).setTitle ("姓名")
.setItems (items, new DialogInterface.OnClickListener () {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText (MainActivity.this,"我是："+items[which],Toast.LENGTH_LONG).show ();
}
});
dialog3.show ();
}
int ide = 0;
private void showSingleDialog() {
final String[] stars = {
"苹果","香蕉","火龙果"};
final AlertDialog.Builder dialog4 = new AlertDialog.Builder (this)
.setTitle ("选择你喜欢的食物:")
.setSingleChoiceItems (stars, 0, new DialogInterface.OnClickListener () {
@Override
public void onClick(DialogInterface dialog, int which) {
ide = which;
}
}).setPositiveButton ("确定", new DialogInterface.OnClickListener () {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText (MainActivity.this,"你选择了："+stars[ide],Toast.LENGTH_LONG).show ();
}
});
dialog4.show ();
}
private void showMultiDialog() {
AlertDialog.Builder dialog5 = new AlertDialog.Builder (this);
final String[] movie = {
"恐怖片","惊悚片","喜剧片","爱情片"};
final boolean[] check = {
true,false,true,false};
dialog5.setTitle ("你想看什么电影？")
.setMultiChoiceItems (movie, check, new DialogInterface.OnMultiChoiceClickListener () {
@Override
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
Log.e("Log",movie[which]);
}
}).setPositiveButton ("确定", new DialogInterface.OnClickListener () {
@Override
public void onClick(DialogInterface dialog, int which) {
String msg = "你喜欢的电影是：";
for (int n=0;n<check.length;n++){
if(check[n]){
msg = msg + movie[n] + " ";
Toast.makeText (MainActivity.this,msg,Toast.LENGTH_LONG).show ();
}
}
}
});
dialog5.show ();
}
private void showWaitDialog() {
ProgressDialog progressDialog = new ProgressDialog (this);
progressDialog.setTitle ("下载中....");
progressDialog.setMessage ("请等待");
progressDialog.show ();
}
private void showProgressDialog() {
final ProgressDialog dialog7 = new ProgressDialog (this);
dialog7.setTitle ("下载中....");
dialog7.setMessage ("请等待");
dialog7.setProgressStyle (ProgressDialog.STYLE_HORIZONTAL);
dialog7.setIndeterminate (false);
dialog7.show ();
final Thread thread = new Thread () {
public void run(){
super.run ();
for (int i = 0;i<=100;i++){
dialog7.setProgress (i);
try {
Thread.sleep (50);
} catch (InterruptedException e) {
e.printStackTrace ();
}
}
dialog7.dismiss ();
}
};
thread.start ();
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
tools:context=".MainActivity">
<Button
android:id="@+id/btn_1"
android:text="单选框"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="myclick"/>
<Button
android:id="@+id/btn_2"
android:text="多选框"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="myclick"/>
<Button
android:id="@+id/btn_3"
android:text="评价框"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="myclick"/>
<Button
android:id="@+id/btn_4"
android:text="列表框"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="myclick"/>
<Button
android:id="@+id/btn_5"
android:text="等待框"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="myclick"/>
<Button
android:id="@+id/btn_6"
android:text="下载框"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="myclick"/>
<Button
android:id="@+id/btn_7"
android:text="退出框"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="myclick"/>
</LinearLayout>
