大帅版android理论课件第

Dialog和PopWindowDialog、PopWindow本课学习AlertDialogProgressDialog自定义DialogPopWindow的使用DialogDialog是android开发过程中最常用到的组件之一，它包括以下几种类型：警告对话框：AlertDialog（最常见）进度对话框：ProgressDialog日期选择对话框：DatePickerDialog时间选择对话框：TimePickerDialog自定义对话框：从Dialog继承AlertDialogAlertDialog警告对话框一个可以有0到3个按钮,一个单选框或复选框的,列表的对话框.Builder类提供了为对话框添加多选或单选列表，以及为这些列表添加事件处理的功能。另外，这个Builder类将AlertDialog对话框上的3个按钮按照他们的位置分别称呼为：PositiveButton,

NeutralButton,

NegativeButtonAlertDialog创建一个简单的AlertDialog：final

AlertDialog.Builder

builder=

new

AlertDialog.Builder(this);builder.setTitle("警告");builder.setMessage("确认退出吗？");builder.setIcon(R.drawable.ic_launcher);builder.setPositiveButton("确定",new

DialogInterface.OnClickListener(){

@Overridepublic

void

onClick(DialogInterface

dialog,int

which){

Log.e(“确定”,“用户点击了确定按钮”);dialog.dismiss();}});builder.setNegativeButton("取消",new

DialogInterface.OnClickListener(){

@Overridepublic

void

onClick(DialogInterface

dialog,

int

which)

{Log.e(“取消”,“用户点击了取消按钮”);dialog.dismiss();//隐藏dialog}});final

AlertDialog

dialog

=

builder.create();AlertDialog创建一个带单选框的AlertDialog：final

AlertDialog.Builder

builder=new

AlertDialog.Builder(this);builder.setTitle("请选择");builder.setIcon(R.drawable.ic_launcher);builder.setSingleChoiceItems(new

String[]{"语文","数学","英语"},-1,newDialogInterface.OnClickListener()

{@Overridepublic

void

onClick(DialogInterface

dialog,int

which){

Log.e("列表","用户选择了第"+which+"项");}});builder.setPositiveButton("确定",new

DialogInterface.OnClickListener(){

@Overridepublic

void

onClick(DialogInterface

dialog,

int

which)

{Log.e("确定","用户点击了确定按钮");builder.dismiss();}});dialog.setNegativeButton("取消",new

DialogInterface.OnClickListener(){

@Overridepublic

void

onClick(DialogInterface

dialog,

int

which)

{Log.e("取消","用户点击了取消按钮");dialog.dismiss();//隐藏dialog}});final

AlertDialog

dialog

=

builder.create();AlertDialog创建一个带复选框的AlertDialog：final

AlertDialog.Builder

builder=new

AlertDialog.Builder(this);builder.setTitle("请选择");builder.setIcon(R.drawable.ic_launcher);builder.setMultiChoiceItems(new

String[]{"语文","数学","英语"},new

boolean[]{false,false,false},newDialogInterface.OnMultiChoiceClickListener()

{@Overridepublic

void

onClick(DialogInterface

dialog,

int

which,boolean

isChecked)

{Log.e("列表","用户点击了第"+which+"项,此项当前状态为"+isChecked);}});builder.setPositiveButton("确定",new

DialogInterface.OnClickListener(){

@Overridepublic

void

onClick(DialogInterface

dialog,int

which){

Log.e("确定","用户点击了确定按钮");dialog.dismiss();}});builder.setNegativeButton("取消",new

DialogInterface.OnClickListener(){

@Overridepublic

void

onClick(DialogInterface

dialog,

int

which)

{Log.e("取消","用户点击了取消按钮");dialog.dismiss();//隐藏dialog}});final

AlertDialogdialog=builder.create();ProgressDialogProgressDialog进度对话框显示一个进度环或者一个进度条.由于它是AlertDialog的扩展,所以它也支持按钮它可以显示一个进度的动画——进度环或者进度条。这个对话框也可以提供按钮，例如取消一个下载等ProgressDialog默认的进度条final

ProgressDialog

dialog

=

new

ProgressDialog(this);dialog.setTitle("进度条");dialog.setIcon(R.drawable.ic_launcher);dialog.setMessage("请稍后");Button

btn

=

(Button)

findViewById(R.id.btn);btn.setOnClickListener(new

View.OnClickListener()

{@Overridepublic

void

onClick(View

v){

dialog.show();//显示dialog}});ProgressDialog使用一个动画进度条来显示进度dialog

=

new

ProgressDialog(this);dialog.setTitle("进度条");dialog.setIcon(R.drawable.ic_launcher);dialog.setMessage("请稍后");dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);@Overridepublic

void

run()

{

int

progress

=

0;while(progress<100){progress++;dialog.setProgress(progress);try

{Thread.sleep(100);}

catch

(InterruptedException

e)

{e.printStackTrace();}}dialog.dismiss();}自定义Dialog效果如下：自定义Dialog自定义Dialog<?xml

version="1.0"

encoding="utf-8"?><resources><style

name="my_dialog_theme"><itemname="android:windowBackground">@drawable/img_bg</item><item

name="android:windowFrame">@null</item><item

name="android:windowNoTitle">true</item><item

name="android:windowFullscreen">false</item><item

name="android:windowIsFloating">true</item></style></resources>通常来说，必须要重新改写一下Dialog的Theme。在res/vaules/目录下新建dialog_theme.xml文件PopWindow新建一个popupWindow弹出框

popupWindow是一个阻塞式的弹出框，这就意味着在我们退出这个弹出框之前，程序会一直等待，这和AlertDialog不同哦，