Android应用开发UI（登录对话框）

Android实现对话框可以使用AlertDialog.Builder类，还可以自定义对话框。如果对话框有button.需要对其设置监听事件OnClickListener.

AlertDialog创建对话框有以下几个常用方法：

setTitle();//给对话框设置title；

setIcon();//给对话框设置图标；

setMessage();//设置对话框的提示信息；

setItems();//设置对话框要显示的一个List,一般用于显示几个命令时。

setSingleChoiceItems();//设置对话框显示一个单选的List

setMultiChoiceItems();//设置对话框显示一系统的复选框；

setPositiveButton();//给对话框添加"Yes"按钮；

setNegativeButton();//给对话框添加"No"按钮。

 

效果图：

 

 

代码：

1.res/values/string.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="hello">这里演示的是登录对话框，详细可登录http://www.80080088.com了解!</string>
    <string name="app_name">登录对话框</string>
    <string name="accountid">帐号：</string>
    <string name="password">密码：</string>
    <string name="login_title">登录提示</string>
    <string name="here_must_login">这里需要登录！</string>
    <string name="ok">确定</string>
    <string name="no">取消</string>
    <string name="exit">退出</string>
    <string name="login_tile">登录框</string>
    <string name="pls_waiting">请等侯...</string>
    <string name="logining">正在为你登录...</string>
    
</resources>

 

2.res/layout/main.xml和login_dialog.xml

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
</LinearLayout>

 

login_dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    >
	<TextView  
	android:id="@+id/username"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_marginLeft="20dip"
    android:layout_marginRight="20dip"
    android:text="@string/accountid"
    android:gravity="left"
    android:textAppearance="?android:attr/textAppearanceMedium">
    </TextView>
    
	<EditText 
		android:id="@+id/username"
		android:layout_height="wrap_content" 
		android:layout_width="fill_parent" 
		android:layout_marginLeft="20dip"
    	android:layout_marginRight="20dip"
    	android:autoText="false"
    	android:capitalize="none"
    	android:gravity="fill_horizontal"
		android:textAppearance="?android:attr/textAppearanceMedium">
	</EditText>

	<TextView  
	android:id="@+id/username"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:layout_marginLeft="20dip"
    android:layout_marginRight="20dip"
    android:text="@string/password"
    android:gravity="left"
    android:textAppearance="?android:attr/textAppearanceMedium">
    </TextView>
    	
    <EditText 
		android:id="@+id/password"
		android:layout_height="wrap_content" 
		android:layout_width="fill_parent" 
		android:layout_marginLeft="20dip"
    	android:layout_marginRight="20dip"
    	android:autoText="false"
    	android:capitalize="none"
    	android:gravity="fill_horizontal"
    	android:password="true"
		android:textAppearance="?android:attr/textAppearanceMedium">
	</EditText>
</LinearLayout>

  

3.Activity类

package com.cottsoft.android;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;

public class A012Activity extends Activity {
	private ProgressDialog m_Dialog;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        Dialog dialog = new AlertDialog.Builder(A012Activity.this)
        	.setTitle(getResources().getString(R.string.login_title))
        	.setMessage(getResources().getString(R.string.here_must_login))
        	.setPositiveButton(getResources().getString(R.string.ok),new DialogInterface.OnClickListener(){
				@Override
				public void onClick(DialogInterface dialog, int which) {
					LayoutInflater factory = LayoutInflater.from(A012Activity.this);
					final View DialogView = factory.inflate(R.layout.login_dialog, null);
					AlertDialog dlg = new AlertDialog.Builder(A012Activity.this)
					.setTitle(getResources().getString(R.string.login_title))
					.setView(DialogView)
					.setPositiveButton(getResources().getString(R.string.ok), new DialogInterface.OnClickListener(){
						@Override
						public void onClick(DialogInterface dialog, int which) {
							m_Dialog = ProgressDialog.show(A012Activity.this, getResources().getString(R.string.pls_waiting), getResources().getString(R.string.logining),true);
							new Thread(){
								public void run(){
									try{}catch(Exception ex){
										ex.printStackTrace();
									}finally{
										m_Dialog.dismiss();
									}
								}
							}.start();
						}
					})
					.setNegativeButton(getResources().getString(R.string.no), new DialogInterface.OnClickListener(){	
						@Override
						public void onClick(DialogInterface dialog, int which) {
							A012Activity.this.finish();
						}
					})
					.create();
					dlg.show();
				}
        	}).setNeutralButton(getResources().getString(R.string.exit), new DialogInterface.OnClickListener(){
				@Override
				public void onClick(DialogInterface dialog, int which) {
					A012Activity.this.finish();
				}
			}).create();
        dialog.show();
    }
}