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MiniTwitter记住密码等功能实现

2015-07-03 15:40 585 查看
miniTwitter登录界面效果图



先贴上要完成的效果图:






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>

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"/>

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"/>

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>

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"

/>

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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>

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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="https://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>



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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>

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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>

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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"

/>

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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>

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<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>

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>

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



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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>

第七步


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<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>

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<strong>第八步:</strong>

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<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("");

}

}

}

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<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;

}

}

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<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;

}

}

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<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:

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

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