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ProgressDialog的使用:请稍等提示

我们经常看到有些应用中会出现 “ 请稍等 ”  对话框,Android中ProgressDialog类可以实现该效果

O(∩_∩)O~

layout/activity_main.xml代码如下:

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:padding="20dp"  >    <Button     android:id="@+id/circleButt"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_marginLeft="20dp"     android:text="圆形进度条"     />  <Button   android:id="@+id/longButt"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_marginLeft="60dp"   android:text="长形进度条"   />  </LinearLayout> View Code 

创建一个ProgressDialogExample类继承Activity

1 package com.example.lenovo.a1101;  2   3 import android.app.Activity;  4 import android.app.ProgressDialog;  5 import android.content.DialogInterface;  6 import android.os.Bundle;  7 import android.os.PersistableBundle;  8 import android.preference.DialogPreference;  9 import android.view.View; 10 import android.widget.Button; 11 import android.widget.Toast; 12  13 /** 14  * Created by Lenovo on 2015/11/1. 15  */ 16 public class ProgressDialogExample extends Activity { 17     Button circleBut; 18     Button longBut; 19     ProgressDialog myDialog; 20  21     @Override 22     public void onCreate(Bundle savedInstanceState) { 23         super.onCreate(savedInstanceState); 24         setContentView(R.layout.activity_main); 25         circleBut = (Button) findViewById(R.id.circleButt); 26         longBut = (Button) findViewById(R.id.longButt); 27         circleBut.setOnClickListener(new View.OnClickListener() { 28             @Override 29             public void onClick(View v) { 30                 myDialog = new ProgressDialog(ProgressDialogExample.this);  31                                      //创建progressDialog对象 32                 myDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);   33                                       //设置进度条为圆形样式 34                 myDialog.setTitle("提示");  35                                       //设置进度条的标题信息 36                 myDialog.setMessage("主人,小白正在努力加载中……");  37                                       //设置进度条的提示信息 38                 myDialog.setIcon(R.drawable.ic_launch); 39                                        //是指进度条的图标 40                 myDialog.setIndeterminate(false); 41                                     //设置进度条是否为不明确 42                 myDialog.setCancelable(true); 43                 //为进度条添加"确定"按钮,并添加点击事件 44                 myDialog.setButton("确定", new DialogInterface.OnClickListener() { 45                     @Override 46                     public void onClick(DialogInterface dialog, int which) { 47                         myDialog.cancel(); 48                     } 49                 }); 50                 myDialog.show(); 51             } 52         }); 53         longBut.setOnClickListener(new View.OnClickListener() { 54             int count = 0;//存储进度条当前的进度值,初始值为0 55  56             @Override 57             public void onClick(View v) { 58  59                 myDialog = new ProgressDialog(ProgressDialogExample.this); 60                 myDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); 61                 myDialog.setTitle("提示"); 62                 myDialog.setMessage("快马加鞭加载中……"); 63                 myDialog.setIcon(R.drawable.ic_launch); 64                 myDialog.setIndeterminate(false); 65                 myDialog.setCancelable(true); 66                 myDialog.setMax(100); 67                                  //设置进度条的最大值 68                 myDialog.setProgress(0); 69                                     //默认值为0 70                 myDialog.setSecondaryProgress(50); 71                                        //设置第二进度条的长度 72                 myDialog.setButton("取消", new DialogInterface.OnClickListener() { 73  74                     @Override 75                     public void onClick(DialogInterface dialog, int which) { 76                         myDialog.cancel(); 77                     } 78  79                 }); 80                 myDialog.show();//显示进度条  81                 new Thread() {             //定义线程,动态改变当前进度条的值 82                     public void run() { 83                         while (count <= 100) { 84                             myDialog.setProgress(count++); 85                             try { 86                                 Thread.sleep(100); 87                             } catch (InterruptedException e) { 88                                 e.printStackTrace(); 89                             } 90                         } 91  92                     } 93  94                 }.start(); 95  96             } 97         }); 98     } 99 }  View Code

然而图标没有显示出来,明天再找问题所在!          各位路过的小伙伴可以帮帮忙!嘿嘿~(*^__^*) ……

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