Android学习笔记（九）——更复杂的进度对话框

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文件里加入一个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文件里加入详细的进度条实现代码：

首先加入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開始

		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()回调方法中加入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OKbutton
					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button
					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、执行一下，效果例如以下：

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