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ProgressDialog和普通的不太一样，它的创建依赖于activity的几个类。可以看下面资料：
http://android.blog.51cto.com/268543/333769
http://blog.csdn.net/jamesliulyc/article/details/6375598
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下来的例子来自于?http://blog.csdn.net/jamesliulyc/article/details/6375598?的修改。
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布局
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<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content"> <Button android:id="@+id/button" android:text="显示进度条对话框" android:layout_width="fill_parent" android:layout_height="wrap_content"/> </LinearLayout>?
activity的代码
package endual.progressdialog.activity;import android.app.Activity;import android.app.Dialog;import android.app.ProgressDialog;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.Button;public class MainActivity extends Activity { private final int PROGRESS_DIALOG = 1; private final int INCREASE = 0; private ProgressDialog progressDialog = null; private Handler handler = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button button = (Button) findViewById(R.id.button); View.OnClickListener listener = new View.OnClickListener() { @Override public void onClick(View view) { showDialog(PROGRESS_DIALOG); } }; button.setOnClickListener(listener); handler = new Handler() { @Override public void handleMessage(Message msg) { switch(msg.what) { case INCREASE: progressDialog.incrementProgressBy(1); if(progressDialog.getProgress() >= 100) { // progressDialog.dismiss(); } break; case 2 : progressDialog.dismiss() ; break; } super.handleMessage(msg); } }; } @Override public Dialog onCreateDialog(int id) { switch(id) { case PROGRESS_DIALOG: //this表示该对话框是针对当前Activity的 progressDialog = new ProgressDialog(this); //设置最大值为100 progressDialog.setMax(100); //设置进度条风格STYLE_HORIZONTAL progressDialog.setProgressStyle( ProgressDialog.STYLE_HORIZONTAL); progressDialog.setTitle("进度条对话框"); break; } return progressDialog; } @Override public void onPrepareDialog(int id, Dialog dialog) { switch(id) { case PROGRESS_DIALOG: //将进度条清0 progressDialog.incrementProgressBy(-progressDialog.getProgress()); new Thread() { public void run() { for(int i=0; i<=100; i++) { handler.sendEmptyMessage(INCREASE); if(progressDialog.getProgress() >= 100) { handler.sendEmptyMessage(2); //发送消失的信号 break; } try { Thread.sleep(50); } catch (InterruptedException e) { e.printStackTrace(); } } } }.start(); break; } }}??
点击按钮出现对话框的进度条，只有当进度条完成以后，才能进行相应的操作
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