(Android实战)ProgressDialog+Thread实现弹出进度条数据异步加载(配有效果图)

效果图

 

 

(Android实战)ProgressDialog+Thread实现弹出进度条数据异步加载(配有效果图)

 

实现说明

 

   实现流程

 

  Step One 弹出进度条对话框

 

  Step Two 执行线程,在线程中实现数据的异步加载

 

  Step Three 在线程数据加载完成后,调用Handler并集合数据,更新界面

 

 

 

3源码

 

 

复制代码
//添加异步操作  
m_Dialog=ProgressDialog.show(m_context, "请等待...", "正在下载安装文件,请稍后...",true);
//mRegsiterHandler.sleep(100);
new Thread(new Runnable(){

@Override
publicvoid run() {
//加载数据
result=0;
try{
//下载文件
String url="http://00.00.00.00:80/nationaltest.html";
HttpClient client
=new DefaultHttpClient();
HttpGet get
=new HttpGet(url);
HttpResponse response;

response
= client.execute(get);
HttpEntity entity
= response.getEntity();
long length = entity.getContentLength();
InputStream is
= entity.getContent();
FileOutputStream fileOutputStream
=null;
if (is !=null) {
File file
=new File(Environment.getExternalStorageDirectory(), "nationaltest.apk");
fileOutputStream
=new FileOutputStream(file);
byte[] buf =newbyte[1024];
int ch =-1;
while ((ch = is.read(buf)) !=-1) {
fileOutputStream.write(buf,
0, ch);
}
}
fileOutputStream.flush();
if (fileOutputStream !=null) {
fileOutputStream.close();
}
result
=2;
}
catch(Exception ex){
result
=-1;
}

//更新界面
// Update the progress bar
mHandler.post(new Runnable() {
publicvoid run() {
if(result==2)
install();
else
Toast.makeText(m_context,
"下载文件失败,请检查网络连接", Toast.LENGTH_SHORT).show();
}
});


m_Dialog.dismiss();
}}).start();

}
复制代码

 

 

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