ProgressDialog用法

摘要: 1.新建Android项目 ProgressDialog 在包andorid.huada下建文件ProgressDialogActivity.java

2.ProgressDialogActivity.java代码如下

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