【Android的几种弹出框】观书散遗帙,探古穷至妙。这篇文章主要讲述Android的几种弹出框相关的知识,希望能为你提供帮助。
项目效果图:
文章图片
新建一个项目,结构图如下所示:
文章图片
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">
<
TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<
Button
android:onClick="click1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="普通对话框"
/>
<
Button
android:onClick="click2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="单选对话框"
/>
<
Button
android:onClick="click3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="多选对话框"
/>
<
Button
android:onClick="click4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="进度条对话框"
/>
<
/LinearLayout>
MainActivity:
package com.demo.duihuakuang;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Build;
import android.os.SystemClock;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
import org.w3c.dom.Text;
public class MainActivity extends AppCompatActivity {@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}public void click1(View view) {AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("警告");
builder.setMessage("世界上最遥远的距离是没有网");
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("点了确定");
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
System.out.println("点了取消");
}
});
//一样要show
builder.show();
}//点击按钮弹出一个单选对话框
public void click2(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("请选择您喜欢的课程");
final String items[] = {"android", "ios", "c", "C++", "html", "C#"};
//-1代表没有条目被选中
builder.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//1.把选中的条目取出来
String item = items[which];
Toast.makeText(getApplicationContext(),item.toString(),Toast.LENGTH_LONG).show();
//2.然后把对话框关闭
dialog.dismiss();
}
});
//一样要show
builder.show();
}//多选对话框
public void click3(View view) {
System.out.println("点击了");
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("请选择你喜欢吃的水果");
final String items[] = {"香蕉", "黄瓜", "冬瓜", "哈密瓜", "梨", "柚子"};
final boolean [] checkedItems ={true,false,false,false,false,true};
builder.setMultiChoiceItems(items, checkedItems, new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int which, boolean isChecked) {}
});
//把选中的挑选出来
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
StringBuffer sb = new StringBuffer();
//把选中的条目的数据取出来
for (int i = 0;
i <
checkedItems.length ;
i++) {
//判断下选中的
if(checkedItems[i]){
String fruit = items[i];
sb.append(fruit+"");
}
Toast.makeText(getApplicationContext(),sb.toString(),Toast.LENGTH_LONG).show();
//2.然后把对话框关闭
dialog.dismiss();
}
}
});
//一样要show
builder.show();
}//进度加载框
public void click4(View view) {final ProgressDialog dialog = new ProgressDialog(this);
dialog.setTitle("正在玩命加载中...");
//设置一下进度条的样式
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
//创建一个子线程
new Thread(){
@Override
public void run() {
//设置进度条的最大值
dialog.setMax(100);
//设置当前进度
for (int i = 0;
i <
=100 ;
i++) {
dialog.setProgress(i);
//睡眠一会儿
SystemClock.sleep(50);
}
//关闭对话框
dialog.dismiss();
}
}.start();
//一样要show
dialog.show();
}
}
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