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android中 MiniTwitter 实现记住密码

2015-07-03 14:57 645 查看 

</pre>MiniTwitter记住密码等功能实现 </h1></div><div id="article_content" class="article_content"><span style="font-size:14px;"><strong>miniTwitter登录界面效果图</strong></span><p><strong>先贴上要完成的效果图：</strong></p><p><strong><img alt="" src="http://img.blog.csdn.net/20150630135933012?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMzA4MDUwOA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" /></strong></p><pre class="java" name="code">


miniTwitter登录界面的布局分析

首先由界面图分析布局，基本可以分为三个部分，下面分别讲解每个部分。

第一部分是一个带渐变色背景的LinearLayout布局，关于背景渐变色就不再贴代码了，效果如下图所示：




Android渐变色背景

第二部分，如图所示：




Android miniTwitter登录界面

这是一个带圆角且背景色为#55FFFFFF（淡蓝色）的RelativeLayout布局，代码如下：

XML/HTML代码

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

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

<solid android:color="#55FFFFFF" />

<!-- 设置圆角

注意： bottomRightRadius是左下角而不是右下角 bottomLeftRadius右下角-->

<corners android:topLeftRadius="10dp" android:topRightRadius="10dp"

android:bottomRightRadius="10dp" android:bottomLeftRadius="10dp"/>

</shape>



solid表示填充色，这里填充的是淡蓝色。corners是设置圆角。



然后RelativeLayou的background引用此drawable，具体RelativeLayout设置如下：

XML/HTML代码

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<RelativeLayout
android:id="@+id/login_div"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="15dip"
android:layout_margin="15dip"
android:background="@drawable/background_login_div_bg"
>
</RelativeLayout>

<RelativeLayout
android:id="@+id/login_div"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="15dip"
android:layout_margin="15dip"
android:background="@drawable/background_login_div_bg"
>
</RelativeLayout>
padding 是指内边距(也就是指内容与边框的距离)，layout_margin为外边距(它的上一层与边框的距离)。

接下来为账号的文本和输入框，首先是账号的文本，代码如下：

XML/HTML代码

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<TextView
android:id="@+id/login_user_input"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="5dp"
android:text="@string/login_label_username"
style="@style/normalText"/>

<TextView
android:id="@+id/login_user_input"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="5dp"
android:text="@string/login_label_username"
style="@style/normalText"/>


android:layout_alignParentTop 这里表示此TextView的位置处于顶部

android:layout_marginTop="5dp" 这里表示此TextView的边框与RelativeLayout的顶部边框距离有5dp

这里需要对这个TextView设置下字体颜色和字体大小，定义在res/style.xml里面：

XML/HTML代码

<style name="normalText" parent="@android:style/TextAppearance">

<item name="android:textColor">#444</item>

<item name="android:textSize">14sp</item>

</style>

定义账号的输入框，如下：

XML/HTML代码

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<EditText
android:id="@+id/username_edit"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="@string/login_username_hint"
android:layout_below="@id/login_user_input"
android:singleLine="true"
android:inputType="text"/>

<EditText
android:id="@+id/username_edit"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="@string/login_username_hint"
android:layout_below="@id/login_user_input"
android:singleLine="true"
android:inputType="text"/>


android:layout_below这里是设置为在账号的文本框的下面，android:singleLine 为单行输入（即你输入回车的时候不会在换行了），android:inputType这里text表示输入的类型为文本。

接下来再是密码文本和输入框，代码如下：



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<TextView
android:id="@+id/login_password_input"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/username_edit"
android:layout_marginTop="3dp"
android:text="@string/login_label_password"
style="@style/normalText"/>
<EditText
android:id="@+id/password_edit"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/login_password_input"
android:password="true"
android:singleLine="true"
android:inputType="textPassword"
<strong>/> </strong>

<TextView
android:id="@+id/login_password_input"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/username_edit"
android:layout_marginTop="3dp"
android:text="@string/login_label_password"
style="@style/normalText"/>
<EditText
android:id="@+id/password_edit"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/login_password_input"
android:password="true"
android:singleLine="true"
android:inputType="textPassword"
<strong>/>  </strong>
登录按钮：

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XML/HTML代码
<Button
android:id="@+id/signin_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/password_edit"
android:layout_alignRight="@id/password_edit"
android:text="@string/login_label_signin"
android:background="@drawable/blue_button"
/>

XML/HTML代码
<Button
android:id="@+id/signin_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/password_edit"
android:layout_alignRight="@id/password_edit"
android:text="@string/login_label_signin"
android:background="@drawable/blue_button"
/>


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<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong> 第三部分：底下的文字和两张图片：</strong></span></span>

<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong>   第三部分：底下的文字和两张图片：</strong></span></span>


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<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong><img src="http://img.blog.csdn.net/20150630144738211?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMzA4MDUwOA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" /> </strong></span></span>

<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong><img src="http://img.blog.csdn.net/20150630144738211?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMzA4MDUwOA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />
</strong></span></span>


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<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong>还是一个RelativeLayout，但这里设置的很简单，代码如下： XML/HTML代码 </strong></span></span><pre name="code" class="html"><RelativeLayout android:layout_width="fill_parent" android:layout_height="wrap_content"> </RelativeLayout>

<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong>还是一个RelativeLayout，但这里设置的很简单，代码如下：

XML/HTML代码
</strong></span></span><pre name="code" class="html"><RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</RelativeLayout>




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<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong>"没有账号?注册"这几个文字定义在string里面，包含了一个<a>标签：

XML/HTML代码
</strong><string name="login_register_link">没有帐号？ <a href="#" mce_href="#">注册</a></string>  <strong>
定义如下：

XML/HTML代码
</strong><TextView  android:id="@+id/register_link"
android:text="@string/login_register_link"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp"
android:textColor="#888"
android:textColorLink="#FF0066CC"
/>  <strong>
TextView是支持简单的html标签的，如<a>标签,但并不是支持所有标签，支持更复杂的html标签得用webView组件。
</strong></span></span>

<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong>"没有账号?注册"这几个文字定义在string里面，包含了一个<a>标签：

XML/HTML代码
</strong><string name="login_register_link">没有帐号？ <a href="#" mce_href="#">注册</a></string>  <strong>
定义如下：

XML/HTML代码
</strong><TextView  android:id="@+id/register_link"
android:text="@string/login_register_link"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp"
android:textColor="#888"
android:textColorLink="#FF0066CC"
/>  <strong>
TextView是支持简单的html标签的，如<a>标签,但并不是支持所有标签，支持更复杂的html标签得用webView组件。
</strong></span></span>


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<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong><span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;">卡通图片:</span>
</strong></span></span>

<span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;"><span style="font-family:SimSun;"><strong><span style="color: rgb(51, 51, 51); font-size: 14px; line-height: 23px;">卡通图片:</span>
</strong></span></span>


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<span style="color: rgb(51, 51, 51); line-height: 23px;"><span style="font-family:SimSun;"><span style="color: rgb(51, 51, 51); line-height: 23px;"></span></span></span><pre name="code" class="html"><strong style="font-size: 14px;">XML/HTML代码
</strong><span style="font-family:SimSun;font-size: 14px;"><ImageView android:id="@+id/miniTwitter_logo"
android:src="@drawable/cat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="25dp"
android:layout_marginLeft="10dp"
android:layout_marginBottom="25dp"
/>  </span><strong style="font-size: 14px;">
</strong><pre name="code" class="html" style="font-size: 14px;"><strong>左边是一个带文字的图片的ImageView：

XML/HTML代码
</strong><ImageView android:src="@drawable/logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/miniTwitter_logo"
android:layout_alignBottom="@id/miniTwitter_logo"
android:paddingBottom="8dp"
/>

<span style="color: rgb(51, 51, 51); line-height: 23px;"><span style="font-family:SimSun;"><span style="color: rgb(51, 51, 51); line-height: 23px;"></span></span></span><pre name="code" class="html"><strong style="font-size: 14px;">XML/HTML代码
</strong><span style="font-family:SimSun;font-size: 14px;"><ImageView android:id="@+id/miniTwitter_logo"
android:src="@drawable/cat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"
android:layout_marginRight="25dp"
android:layout_marginLeft="10dp"
android:layout_marginBottom="25dp"
/>  </span><strong style="font-size: 14px;">
</strong><pre name="code" class="html" style="font-size: 14px;"><strong>左边是一个带文字的图片的ImageView：

XML/HTML代码
</strong><ImageView android:src="@drawable/logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@id/miniTwitter_logo"
android:layout_alignBottom="@id/miniTwitter_logo"
android:paddingBottom="8dp"
/>


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<strong style="font-family: SimSun; font-size: 12px;"><span style="font-family:SimSun;"><span style="font-size:14px;"><span style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px;">实现miniTwitter登陆界面的具体步骤</span></span></span></span></strong>

<strong style="font-family: SimSun; font-size: 12px;"><span style="font-family:SimSun;"><span style="font-size:14px;"><span style="margin: 0px; padding: 0px;"><span style="margin: 0px; padding: 0px;">实现miniTwitter登陆界面的具体步骤</span></span></span></span></strong>


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<strong style="font-family: SimSun;font-size:14px;">具体步骤如下：</strong>

<strong style="font-family: SimSun;font-size:14px;">具体步骤如下：</strong>


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<span style="font-family: SimSun;font-size:14px;"></span><pre name="code" class="html"><strong>第一步：一些字符串定义
res/values/strings.xml

XML/HTML代码
</strong><pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
<resources>

<string name="app_name">MiniTwitterSimulate</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
<string name="tvName">用户名</string>
<string name="tvPassword">密码</string>
<string name="btnLogin">登录</string>
<string name="tvRegister">没有帐号？ <a href="#" mce_href="#">注册</a></string>
<string name="remember">记住密码</string>
<string name="title_activity_login2">Login2Activity</string>
<string name="tv_success">登录成功！</string>
</resources>

<span style="font-family: SimSun;font-size:14px;"></span><pre name="code" class="html"><strong>第一步：一些字符串定义
res/values/strings.xml

XML/HTML代码
</strong><pre name="code" class="html"><?xml version="1.0" encoding="utf-8"?>
<resources>

<string name="app_name">MiniTwitterSimulate</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>
<string name="tvName">用户名</string>
<string name="tvPassword">密码</string>
<string name="btnLogin">登录</string>
<string name="tvRegister">没有帐号？ <a href="#" mce_href="#">注册</a></string>
<string name="remember">记住密码</string>
<string name="title_activity_login2">Login2Activity</string>
<string name="tv_success">登录成功！</string>
</resources>
第二步：res/values/style.xmlXML/HTML代码<?xml version="1.0" encoding="utf-8"?> <resources> <style name="normalText" parent="@android:style/TextAppearance"> <item name="android:textColor">#444</item> <item name="android:textSize">14sp</item>
</style> </resources> 第三步：背景色为渐变色res/drawable-mdpi/background_login.xmlXML/HTML代码<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <gradient android:startColor="#FFACDAE5" android:endColor="#FF72CAE1"
android:angle="45" /> </shape> 第四步：背景色味淡蓝色且为圆角res/drawable-mdpi/background_login_div_bg.xmlXML/HTML代码<?xml version="1.0" encoding="UTF-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <solid android:color="#55FFFFFF"
/> <!-- 设置圆角 注意： bottomRightRadius是左下角而不是右下角 bottomLeftRadius右下角--> <corners android:topLeftRadius="10dp" android:topRightRadius="10dp" android:bottomRightRadius="10dp" android:bottomLeftRadius="10dp"/> </shape>
第五步：

res/layout/login_top.xmlXML/HTML代码


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<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/btnbg_roundcorner"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin" >

<TextView
android:id="@+id/tvUsername"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="@string/tvName"
android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText
android:id="@+id/etUsername"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/tvUsername"
android:layout_below="@+id/tvUsername"
android:background="@android:drawable/edit_text"
android:ems="10" >

<requestFocus />
</EditText>

<TextView
android:id="@+id/tvPassword"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/etUsername"
android:layout_below="@+id/etUsername"
android:text="@string/tvPassword"
android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText
android:id="@+id/etPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/tvPassword"
android:layout_below="@+id/tvPassword"
android:layout_marginTop="16dp"
android:background="@android:drawable/edit_text"
android:ems="10"
android:inputType="textPassword" />

<Button
android:id="@+id/btnLogin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/etPassword"
android:layout_below="@+id/etPassword"
android:layout_marginTop="20dp"
android:background="#FF72CAE1"
android:text="@string/btnLogin" />

<CheckBox
android:id="@+id/rememberpassword"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/etPassword"
android:layout_alignTop="@+id/btnLogin"
android:layout_marginLeft="19dp"
android:checked="true"
android:text="@string/remember" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/btnbg_roundcorner"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin" >

<TextView
android:id="@+id/tvUsername"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="@string/tvName"
android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText
android:id="@+id/etUsername"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/tvUsername"
android:layout_below="@+id/tvUsername"
android:background="@android:drawable/edit_text"
android:ems="10" >

<requestFocus />
</EditText>

<TextView
android:id="@+id/tvPassword"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/etUsername"
android:layout_below="@+id/etUsername"
android:text="@string/tvPassword"
android:textAppearance="?android:attr/textAppearanceMedium" />

<EditText
android:id="@+id/etPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/tvPassword"
android:layout_below="@+id/tvPassword"
android:layout_marginTop="16dp"
android:background="@android:drawable/edit_text"
android:ems="10"
android:inputType="textPassword" />

<Button
android:id="@+id/btnLogin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/etPassword"
android:layout_below="@+id/etPassword"
android:layout_marginTop="20dp"
android:background="#FF72CAE1"
android:text="@string/btnLogin" />

<CheckBox
android:id="@+id/rememberpassword"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/etPassword"
android:layout_alignTop="@+id/btnLogin"
android:layout_marginLeft="19dp"
android:checked="true"
android:text="@string/remember" />

</RelativeLayout>
第六步：


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<pre name="code" class="html" style="font-size:14px; font-family: SimSun; color: rgb(51, 51, 51); line-height: 23px;"><strong></strong><pre name="code" class="html">res/layout/login_bottom.xml

<pre name="code" class="html" style="font-size:14px; font-family: SimSun; color: rgb(51, 51, 51); line-height: 23px;"><strong></strong><pre name="code" class="html">res/layout/login_bottom.xml



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<pre name="code" class="html" style="font-family: SimSun;"><span style="font-size:10px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content" >

<TextView
android:id="@+id/tvRegist"
android:layout_width="wrap_content"
android:layout_height="wrap_content"</span><span style="font-size:14px;">
</span><span style="font-size:10px;">    android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="21dp"
android:layout_marginTop="18dp"
android:text="@string/tvRegister"

android:textColorLink="#FF0066CC" />

<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="24dp"
android:src="@drawable/panda" />

<ImageView
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="28dp"
android:src="@drawable/icon" />

</RelativeLayout></span>

<pre name="code" class="html" style="font-family: SimSun;"><span style="font-size:10px;"><?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content" >

<TextView
android:id="@+id/tvRegist"
android:layout_width="wrap_content"
android:layout_height="wrap_content"</span><span style="font-size:14px;">
</span><span style="font-size:10px;">    android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="21dp"
android:layout_marginTop="18dp"
android:text="@string/tvRegister"

android:textColorLink="#FF0066CC" />

<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="24dp"
android:src="@drawable/panda" />

<ImageView
android:id="@+id/imageView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="28dp"
android:src="@drawable/icon" />

</RelativeLayout></span>


第七步：


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<pre name="code" class="html"><strong>res/layout/activity_main.xml</strong>

<pre name="code" class="html"><strong>res/layout/activity_main.xml</strong>



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<pre name="code" class="html"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/loginbg"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".LoginActivity" >

<include layout="@layout/login_top"/>

<include layout="@layout/login_bottom"/>"

</LinearLayout>

<pre name="code" class="html"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/loginbg"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".LoginActivity" >

<include layout="@layout/login_top"/>

<include layout="@layout/login_bottom"/>"

</LinearLayout>


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<strong>第八步：</strong>

<strong>第八步：</strong>


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<strong>LoginActivity.java:</strong>

<strong>LoginActivity.java:</strong>


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<pre name="code" class="html">package com.example.minitwittersimulate;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.text.Editable;
import android.text.TextUtils;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class LoginActivity extends Activity {
private Button btnLogin;
private EditText etUsername;

private EditText etPassword;
private CheckBox rememberpassword;

// 声明一个SharedPreferences用于保存数据
private SharedPreferences setting = null;
private static final String PREFS_NAME = "NamePwd";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
etUsername=(EditText)findViewById(R.id.etUsername);
etPassword=(EditText)findViewById(R.id.etPassword);
rememberpassword=(CheckBox)findViewById(R.id.rememberpassword);
btnLogin=(Button)findViewById(R.id.btnLogin);
setListener() ;
getData();
}
private void setListener() {
// 为登录按钮绑定事件
btnLogin.setOnClickListener(new OnClickListener() {
String username=etUsername.getText().toString();
String password=etPassword.getText().toString();
@Override
public void onClick(View arg0) {
if(!(TextUtils.isEmpty(username))&&(TextUtils.isEmpty(password)))
{
// 判断用户名和密码
if ("wch".equals(username)&&"wch".equals(password))
{
// 判断复选框是否选中
/*if (rememberpassword.isChecked())
{
setting = getSharedPreferences(PREFS_NAME,
MODE_PRIVATE);
// 得到Editor对象
Editor edit = setting.edit();
// 记录保存标记
edit.putBoolean("rememberpassword", true);
// 记录用户名
edit.putString("username",username);
// 记录密码
edit.putString("password",password);
edit.commit(); // 一定记得提交
}

else
{
setting= getSharedPreferences(PREFS_NAME,
MODE_PRIVATE);
// 得到Editor对象
Editor edit = setting.edit();
// 记录保存标记
edit.putBoolean("rememberpassword", false);
// 记录用户名
edit.putString("username", "");
// 记录密码
edit.putString("password", "");
edit.commit(); // 一定记得提交
}
*/

// 跳转到首页
Intent intent = new Intent(LoginActivity.this,
Login2Activity.class);
startActivity(intent);
finish();
}
}
else
{
// 显示错误提示
Toast.makeText(getApplicationContext(), "用户名或密码错误",
Toast.LENGTH_SHORT).show();
}

}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
protected void onResume() {
// 在界面显示数据之前得到之前存储的数据
super.onResume();
getData();
}

/**
* 获取存储是数据
*/
private void getData() {
// 得到sharedpreferences对象
setting = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
// 判断是否之前存储过用户名密码
if (setting.getBoolean("isKeep", false)) {
// 如果之前存储过，则显示在相应文本框内
etUsername.setText(setting.getString("username", ""));
etPassword.setText(setting.getString("password", ""));
} else {
// 否则显示空
etUsername.setText("");
etPassword.setText("");
}
}

}

<pre name="code" class="html">package com.example.minitwittersimulate;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.text.Editable;
import android.text.TextUtils;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class LoginActivity extends Activity {
private Button btnLogin;
private EditText etUsername;

private EditText etPassword;
private CheckBox rememberpassword;

// 声明一个SharedPreferences用于保存数据
private SharedPreferences setting = null;
private static final String PREFS_NAME = "NamePwd";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
etUsername=(EditText)findViewById(R.id.etUsername);
etPassword=(EditText)findViewById(R.id.etPassword);
rememberpassword=(CheckBox)findViewById(R.id.rememberpassword);
btnLogin=(Button)findViewById(R.id.btnLogin);
setListener() ;
getData();
}
private void setListener() {
// 为登录按钮绑定事件
btnLogin.setOnClickListener(new OnClickListener() {
String username=etUsername.getText().toString();
String password=etPassword.getText().toString();
@Override
public void onClick(View arg0) {
if(!(TextUtils.isEmpty(username))&&(TextUtils.isEmpty(password)))
{
// 判断用户名和密码
if ("wch".equals(username)&&"wch".equals(password))
{
// 判断复选框是否选中
/*if (rememberpassword.isChecked())
{
setting = getSharedPreferences(PREFS_NAME,
MODE_PRIVATE);
// 得到Editor对象
Editor edit = setting.edit();
// 记录保存标记
edit.putBoolean("rememberpassword", true);
// 记录用户名
edit.putString("username",username);
// 记录密码
edit.putString("password",password);
edit.commit(); // 一定记得提交
}

else
{
setting= getSharedPreferences(PREFS_NAME,
MODE_PRIVATE);
// 得到Editor对象
Editor edit = setting.edit();
// 记录保存标记
edit.putBoolean("rememberpassword", false);
// 记录用户名
edit.putString("username", "");
// 记录密码
edit.putString("password", "");
edit.commit(); // 一定记得提交
}
*/

// 跳转到首页
Intent intent = new Intent(LoginActivity.this,
Login2Activity.class);
startActivity(intent);
finish();
}
}
else
{
// 显示错误提示
Toast.makeText(getApplicationContext(), "用户名或密码错误",
Toast.LENGTH_SHORT).show();
}

}
});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
protected void onResume() {
// 在界面显示数据之前得到之前存储的数据
super.onResume();
getData();
}

/**
* 获取存储是数据
*/
private void getData() {
// 得到sharedpreferences对象
setting = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
// 判断是否之前存储过用户名密码
if (setting.getBoolean("isKeep", false)) {
// 如果之前存储过，则显示在相应文本框内
etUsername.setText(setting.getString("username", ""));
etPassword.setText(setting.getString("password", ""));
} else {
// 否则显示空
etUsername.setText("");
etPassword.setText("");
}
}

}


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<span style="font-weight: bold; font-family: SimSun;">Login2Activity.java:</span>

<span style="font-weight: bold; font-family: SimSun;">Login2Activity.java:</span>


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package com.example.minitwittersimulate;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;

import android.text.TextUtils;
import android.view.Menu;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class Login2Activity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login2);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.login2, menu);
return true;
}

}
package com.example.minitwittersimulate;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;

import android.text.TextUtils;
import android.view.Menu;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class Login2Activity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login2);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.login2, menu);
return true;
}

}


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<strong>MainActivity.java:</strong>

<strong>MainActivity.java:</strong>


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<pre name="code" class="html">package com.example.minitwittersimulate;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.Window;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}
<pre name="code" class="html">package com.example.minitwittersimulate;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.Window;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}


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<strong>运行结果图：</strong>

<strong>运行结果图：</strong>
如果输入的用户名或者密码不正确







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输入正确：

输入正确：


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<img src="http://img.blog.csdn.net/20150630152116599?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMzA4MDUwOA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />
<img src="http://img.blog.csdn.net/20150630152116599?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMzA4MDUwOA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />


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</pre><pre>


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</pre><strong style="FONT-FAMILY: SimSun; FONT-SIZE: 14px"></strong><pre>






                                            

                                        

                        
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