Android中的各类Dialog

   下面是本身总结的Android经常使用的几种Dialog：

1.AlertDialog android中功能最丰富，用途最广的对话框。

// 1 建立一个Builder  
	AlertDialog.Builder builder = new AlertDialog.Builder(this);
	// 2 给Builder设置属性
	builder.setTitle("Java培训");// 设置Dialog的标题
		builder.setMessage("访问OSC的网页");// 设置Dialog的信息
		builder.setPositiveButton("肯定", new DialogInterface.OnClickListener() {// 设置肯定按钮

					@Override
					public void onClick(DialogInterface dialog, int which) {
						Toast.makeText(getApplicationContext(), "访问OSC的网页", 0).show();
					}
				});
		builder.setNeutralButton("隐藏", new DialogInterface.OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
			}
		});
		builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
			}
		});
	//从上咱们能够看出Dialog的按钮通常分为了三种，肯定builder.setPositiveButton(),隐藏builder.setNeutralButton,取消builder.setNegativeButton
	// 3 建立Dialog
		AlertDialog dialog = builder.create();
		
	// 4 显示Dialog	
	dialog.show();

2.ListDialog,设置选项的时候用以下代码：

final String[] items = { "java", "donet", "php" };
builder.setItems(items, new DialogInterface.OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				Toast.makeText(getApplicationContext(), items[which], 0).show();
			}
		});

3.singleItemDialog，这样子可以让选项以单选框的样式呈现出来：

builder.setSingleChoiceItems(items, 2, new DialogInterface.OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				Toast.makeText(getApplicationContext(), items[which], 0).show();
			}
		});

4.多选框的Dialog

final String[] items = { "java", "donet", "php" };
		final boolean[] checkedItems = new boolean[] { true, false, false };
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle("选择语言");
		builder.setMultiChoiceItems(items, checkedItems, new DialogInterface.OnMultiChoiceClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which, boolean isChecked) {
				Toast.makeText(getApplicationContext(), items[which] + isChecked, 0).show();
			}
		});

5.进度条的dialog

ProgressDialog progressDialog = new ProgressDialog(this);
		progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);// 设置为水平进度条
		progressDialog.setTitle("正在下载。。。");
		progressDialog.setMax(100);// 设置进度条的最大值
		progressDialog.setCancelable(false);// 设置回退键失效

		progressDialog.setButton("取消", new DialogInterface.OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
			}
		});
		progressDialog.show();
		progressDialog.setProgress(50);// 设置进度条的当前刻度

注意的是Dialog是activity的一个控件，弹出Dialog的时候，activity是不会失去焦点的，也就是说activity不会调用onPause()方法