[转]Android的userlogin登录

本文转自：http://hteqc6o.blog.sohu.com/199334086.html

用户注册

1.首先，先画你想要编译出的界面

根据草图，仅仅使用linearLayout的布局是不够的，还需要与RelativeLayout嵌套使用

编写String.Xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

<string name="hello">Hello World, UserLoginActivity!</string>

<string name="app_name">用户注册界面</string>

<string name="nameString">用户名</string>

<string name="ageString">年龄</string>

<string name="registerButtonText">注册</string>

<string name="sexString">性别</string>

<string name="favoriteString">喜好</string>

<string name="cityString">城市</string>

<string name="passString">密码</string>

<string name="pingpang">兵乓球</string>

<string name="basketball">篮球</string>

<string name="football">足球</string>

<string name="tennis">网球</string>

</resources>

编写parameters.xml:

这是存放属性信息，如字体、TextView和EditText的宽度。

<?xml version="1.0" encoding="utf-8"?>

<resources>

<dimen name="fontSize">22px</dimen>

<dimen name="TextViewWidth">90px</dimen>

<dimen name="EditTextWidth">160px</dimen>

</resources>

再编写main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical" >

<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

>

<TextView

android:layout_width="@dimen/TextViewWidth"

android:layout_height="wrap_content"

android:text="@string/nameString"

android:textSize="@dimen/fontSize"

android:id="@+id/name"/>

<EditText

android:layout_width="@dimen/EditTextWidth"

android:layout_height="wrap_content"

android:layout_toRightOf="@string/nameString"

android:layout_alignTop="@id/name"

android:id="@+id/nameValue"/>/

</RelativeLayout>

<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

>

<TextView

android:layout_width="@dimen/EditTextWidth"

android:layout_height="wrap_content"

android:text="@string/passString"

android:textSize="@dimen/fontSize"

android:id="@+id/pass"/>

<EditText

android:password="true"

android:layout_width="@dimen/EditTextWidth"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/pass"

android:layout_alignTop="@id/pass"

android:id="@+id/passValue"

/>

</RelativeLayout>

<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

>

<TextView android:layout_width="@dimen/TextViewWidth"

android:layout_height="wrap_content"

android:text="@string/ageString"

android:textSize="@dimen/fontSize"

android:id="@+id/age"

/>

<EditText

android:layout_width="@dimen/EditTextWidth"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/age"

android:layout_alignTop="@id/age"

android:id="@+id/ageValue"

/>

</RelativeLayout>

<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

>

<TextView android:layout_width="@dimen/TextViewWidth"

android:layout_height="wrap_content"

android:text="@string/sexString"

android:textSize="@dimen/fontSize"

android:id="@+id/sex"

/>

<RadioGroup

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/sex"

android:checkedButton="@+id/radioMan"

android:orientation="horizontal"

android:id="@+id/sexMenu">

<RadioButton android:text="男" android:id="@id/radioMan"/>

<RadioButton android:text="女" android:id="@+id/radioWomen"/>

</RadioGroup>

</RelativeLayout>

<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

>

<TextView

android:layout_width="@dimen/TextViewWidth"

android:layout_height="wrap_content"

android:text="@string/favoriteString"

android:textSize="@dimen/fontSize"

android:id="@+id/favorite"/>

<CheckBox

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/favorite"

android:text="@string/pingpang"

android:id="@+id/checkboxpingpang"

/>

<CheckBox

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/checkboxpingpang"

android:text="@string/football"

android:id="@+id/checkboxfootball"/>

<CheckBox

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/favorite"

android:layout_below="@id/checkboxfootball"

android:text="@string/basketball"

android:id="@+id/checkboxbasketball"/>

<CheckBox

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/checkboxbasketball"

android:layout_alignTop="@id/checkboxbasketball"

android:text="@string/tennis"

android:id="@+id/checkboxtennis"/>

</RelativeLayout>

<RelativeLayout

android:layout_width="fill_parent"

android:layout_height="wrap_content"

>

<TextView

android:layout_width="@dimen/TextViewWidth"

android:layout_height="wrap_content"

android:text="@string/cityString"

android:textSize="@dimen/fontSize"

android:id="@+id/city"/>

<Spinner

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/city"

android:id="@+id/cityItems">

</Spinner>

</RelativeLayout>

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/registerButtonText"

android:id="@+id/regidterButton"/>

</LinearLayout>

·参数设置：

<dimen name=”fontSize”>22px</dimen>

存放px(pixels),in(inches),mm(millmeters),pt(points at 72 DPI)类型的数据

·应用：

Android:textSize=”@dimen/fontSize”

·布局的特别属性

在这里我们需要用到Relativelayout 的个别属性，例如：

Android:layout_toRightOf=”@id/age”

这是与控件age向右对齐

·输入框的输入限制

Android：numeric=”integer

编写java代码：

” package com.sharpandroid.UserLogin;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.app.AlertDialog;

import android.app.ProgressDialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.EditText;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.Spinner;

public class LoginActivity extends Activity {

private static final String[] cities = {"北京","上海","石家庄","保定","米兰","慕尼黑","巴黎"};

private EditText name,age,pass;

private Button regButton;

private RadioGroup sexRadioGroup;

private CheckBox basketball,football,pingpang,tennis;

private Spinner cityItems;

private boolean flag = true;

private List<CheckBox> favorities;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

//定义一个ArrayList，用来存放所有的checkBox

favorities = new ArrayList<CheckBox>();

//得到相应的对对象

name = (EditText) findViewById(R.id.nameValue);

age = (EditText) findViewById(R.id.ageValue);

pass = (EditText) findViewById(R.id.passValue);

regButton = (Button) findViewById(R.id.regidterButton);

cityItems = (Spinner) findViewById(R.id.cityItems);

sexRadioGroup = (RadioGroup) findViewById(R.id.sexMenu);

basketball = (CheckBox) findViewById(R.id.checkboxbasketball);

//将basketball对象添加到favorities中

favorities.add(basketball);

football = (CheckBox) findViewById(R.id.checkboxfootball);

favorities.add(football);

pingpang = (CheckBox) findViewById(R.id.checkboxpingpang);

favorities.add(pingpang);

tennis = (CheckBox) findViewById(R.id.checkboxtennis);

favorities.add(tennis);

//创建一个数组型适配器，并将cities中的数据

ArrayAdapter<String>adpter = new ArrayAdapter<String>(

LoginActivity.this,android.R.layout.simple_spinner_item,cities);

adpter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

cityItems.setAdapter(adpter);

//为regButton注册一个事件监听器

regButton.setOnClickListener(new View.OnClickListener() {

//当按钮被点击的时候调用

@Override

public void onClick(View v) {

flag = addUser();

if(flag)

//创建Alertdialog对话框的显示登录信息。

new

AlertDialog.Builder(LoginActivity.this).setTitle("请确认信息")

.setMessage("您的信息如下："+"\n" + "姓名："

+name.getText().toString()+"/n"+" 年龄："

+age.getText().toString()+"/n"+"性别："

+getSex()+"\n"+"爱好："+getFavorite()

+"\n"+"城市："+getCity()+"\n")

.setCancelable(false).setPositiveButton("确定",

new DialogInterface.OnClickListener() {

public void onClick(

DialogInterface dialog, int id) {

// TODO Auto-generated method stub

ProgressDialog.show(

LoginActivity.this,"用户信息注册中","请等待……")

.setCancelable(true);

}

}).setNegativeButton("修改",

new DialogInterface.OnClickListener() {

public void onClick(

DialogInterface dialog, int id) {

dialog.cancel();//删除对话框

}

}).show();

}

});

}

//获取Spinner中的值

private String getCity(){

return cities[cityItems.getSelectedItemPosition()];

}

//获取checkBox中的值

private String getFavorite(){

String favString = "";

for(CheckBox cd : favorities){

if (cd.isChecked()){

favString +=cd.getText().toString();

favString +=",";

}

}

if(favString != ""){

favString = favString.substring(0,favString.length() -1);

}else{

favString="您还没有选择！";

}return favString;

}

private String getSex(){

RadioButton mRadio = (RadioButton)findViewById

(sexRadioGroup.getCheckedRadioButtonId());

return mRadio.getText().toString();

}

public boolean addUser(){

if(name.getText().toString().length()==0){

name.setError("用户名不嫩为空");

return false;

}

if (age.getText().toString().length()==0){

age.setError("年龄不能为空");

return false;

}

if(pass.getText().toString().length()==0){

pass.setError("密码不能为空");

return false;

}

return true;

}

}

当你没有输入用户名就点击注册会出现提示：如下：

点击注册会出现：