ProgressDialog用法

最新推荐文章于 2025-09-12 17:34:15 发布

lyuharvey

最新推荐文章于 2025-09-12 17:34:15 发布

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文章标签：移动开发 ui python

原文链接：https://my.oschina.net/u/1463230/blog/233029

本文介绍了一个使用Android线程实时更新UI的进度对话框实例，展示了如何在后台线程中执行任务并在主线程中更新UI状态。

2019独角兽企业重金招聘Python工程师标准>>>

package android.huada;

import android.app.Activity; import android.app.ProgressDialog; import android.os.Bundle; import android.os.Handler; import android.os.Message;

public class ProgressDialogActivity extends Activity { /** Called when the activity is first created. */ ProgressDialog progressDialog; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); progress("下载数据中", "请稍等......"); } public void progress(String title,String message){ progressDialog = new ProgressDialog(this); updateThread thread= new updateThread(); progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progressDialog.setMessage(message); progressDialog.setTitle(title); progressDialog.setProgress(0); progressDialog.setMax(100); progressDialog.show(); thread.start();

} Handler handler = new Handler(){

@Override public void handleMessage(Message msg) { // TODO Auto-generated method stub if(msg.what>=100){ progressDialog.cancel(); } progressDialog.setProgress(msg.what); super.handleMessage(msg); } }; class updateThread extends Thread{ public void run(){ handler.sendEmptyMessage(0); try { updateThread.sleep(1000); handler.sendEmptyMessage(10); updateThread.sleep(1000); handler.sendEmptyMessage(20); updateThread.sleep(1000); handler.sendEmptyMessage(30); updateThread.sleep(1000); handler.sendEmptyMessage(40); updateThread.sleep(1000); handler.sendEmptyMessage(50); updateThread.sleep(1000); handler.sendEmptyMessage(60); updateThread.sleep(1000); handler.sendEmptyMessage(70); updateThread.sleep(1000); handler.sendEmptyMessage(80); updateThread.sleep(1000); handler.sendEmptyMessage(100); updateThread.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }; }

3.配置文件main.xml代码如下

4.此项目是通过线程及时修改UI，运行效果图如下

转载于:https://my.oschina.net/u/1463230/blog/233029