**显示操作进度的对话框** 1、使用上一篇创建的同一项目，在activity_main.xml文件中添加一个Button： ~~~ <Button android:id="@+id/btn_dialog3" android:layout_width="fill_parent" android:layout_height="wrap_content" android:onClick="onClick3" android:text="Click to display a detailed progress dialog" /> ~~~ 2、在MainActivity.java文件中添加具体的进度条实现代码： 首先添加onClick3()方法： ~~~ public void onClick3(View v) { showDialog(1);// id为1，在调用回调方法onCreateDialog()时，将id传进去，使其选择case 1情况。 progressDialog.setProgress(0);// 从0开始 new Thread(new Runnable() { @Override public void run() { // TODO Auto-generated method stub for (int i = 1; i <= 10; i++) { try { Thread.sleep(1000); progressDialog.incrementProgressBy(100 / 10);// 步进为10 } catch (InterruptedException e) { // TODO: handle exception e.printStackTrace(); } } progressDialog.dismiss();// 销毁对话框 } }).start(); } ~~~ 再在onCreateDialog()回调方法中添加id=1时的代码（即实现显示操作进度对话框的代码）： ~~~ case 1: progressDialog = new ProgressDialog(this); progressDialog.setIcon(R.drawable.ic_launcher); progressDialog.setTitle("Downloading files..."); progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);// 设置进度条样式 progressDialog.setButton(DialogInterface.BUTTON_POSITIVE, "OK",// 设置OK按钮 new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(getBaseContext(), "OK clicked!", Toast.LENGTH_SHORT).show(); } }); progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel",// 设置取消按钮 new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub Toast.makeText(getBaseContext(), "Cancel clicked!", Toast.LENGTH_SHORT).show(); } }); return progressDialog; ~~~ 3、运行一下，效果如下：  **[点击此处下载完整代码~](http://download.csdn.net/detail/u012904198/7307257)**