Android之QQ登录界面_移动开发_编程开发_程序员俱乐部

首先过程中碰到的几个问题：

1、对 EditText 进行自定义背景

2、运行时自动 EditText 自动获得焦点

3、在获得焦点时即清空 hint ，而不是输入后清空

4、清空按钮的出现时机（在得到焦点并且有输入内容时）

　　.........

---  这些问题都有一一解决 ---

 

以下是代码：

布局 fragment_main（问题2）

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  1 <!-- android:focusable="true"  
  2      android:focusableInTouchMode="true" 
  3       把EditText默认的行为截断了！ -->
  4 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  5     xmlns:tools="http://schemas.android.com/tools"
  6     android:layout_width="match_parent"
  7     android:layout_height="match_parent"
  8     android:background="#ECEDF1"
  9     android:focusable="true"
 10     android:focusableInTouchMode="true"
 11     tools:context="com.dragon.android.qqlogin.MainActivity$PlaceholderFragment" >
 12 
 13     <ImageView
 14         android:id="@+id/imageView1"
 15         android:layout_width="70dp"
 16         android:layout_height="70dp"
 17         android:layout_centerHorizontal="true"
 18         android:layout_marginBottom="5dp"
 19         android:layout_marginTop="40dp"
 20         android:src="@drawable/a" />      
 21 
 22     <EditText
 23         android:id="@+id/editText1"
 24         android:layout_width="match_parent"
 25         android:layout_height="wrap_content"
 26         android:layout_below="@id/imageView1"
 27         android:ems="10"
 28         android:background="@drawable/bg_edittext"
 29         android:inputType="textPersonName"
 30         android:gravity="center"
 31         android:textColor="#6A6A6C"
 32         android:hint="@string/inaccount"
 33         android:textColorHint="#ECEDDD">
 34     </EditText>
 35 
 36     <EditText
 37         android:id="@+id/editText2"
 38         android:layout_width="match_parent"
 39         android:layout_height="wrap_content"
 40         android:layout_below="@id/editText1"
 41         android:ems="10"
 42         android:background="@drawable/bg_edittext"
 43         android:inputType="textPassword"
 44         android:gravity="center"
 45         android:textColor="#6A6A6C"
 46         android:hint="@string/inpwd"
 47         android:textColorHint="#ECEDDD" >
 48     </EditText>
 49 
 50     <Button
 51         android:id="@+id/button1"
 52         android:layout_width="match_parent"
 53         android:layout_height="40dp"
 54         android:layout_below="@id/editText2"
 55         android:layout_marginLeft="20dp"
 56         android:layout_marginRight="20dp"
 57         android:layout_marginTop="10dp"
 58         android:background="@drawable/bg_button"
 59         android:text="@string/button"
 60         android:gravity="center"
 61         android:textColor="#F9FAFB" />
 62 
 63     <LinearLayout
 64         android:layout_width="match_parent"
 65         android:layout_height="wrap_content"
 66         android:layout_alignParentBottom="true"
 67         android:padding="10dp" >
 68 
 69         <TextView
 70             android:id="@+id/textView2"
 71             android:layout_width="wrap_content"
 72             android:layout_height="wrap_content"
 73             android:gravity="center"
 74             android:text="@string/faillogin"
 75             android:textColor="#0EB1EF" />
 76 
 77         <TextView
 78             android:id="@+id/textView3"
 79             android:layout_width="match_parent"
 80             android:layout_height="wrap_content"
 81             android:gravity="right"
 82             android:text="@string/regist"
 83             android:textColor="#0EB1EF" />  
 84     </LinearLayout>
 85 
 86     <Button
 87         android:id="@+id/button2"
 88         android:layout_width="16dp"
 89         android:layout_height="16dp"
 90         android:layout_alignTop="@id/editText1"
 91         android:layout_marginTop="15dp"
 92         android:layout_alignParentRight="true"
 93         android:layout_marginRight="10dp"
 94         android:background="@drawable/clear"
 95         android:visibility="invisible" />
 96 
 97     <Button
 98         android:id="@+id/button3"
 99         android:layout_width="16dp"
100         android:layout_height="16dp"
101         android:layout_alignTop="@id/editText2"
102         android:layout_marginTop="15dp"
103         android:layout_alignLeft="@+id/button2"
104         android:background="@drawable/clear"
105         android:visibility="invisible" />
106 
107 </RelativeLayout>

fragment_main

Button 和 EditText 的背景（问题1）

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <shape xmlns:android="http://schemas.android.com/apk/res/android" >
 3     
 4     <stroke android:width="1px" android:color="#00ACED" />
 5     
 6     <solid android:color="#00ACED" />
 7     
 8     <corners android:radius="10dp" />
 9     
10 </shape>

bg_button

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <shape xmlns:android="http://schemas.android.com/apk/res/android" >
 3     
 4     <stroke android:width="1px" android:color="#ECEDF1" />
 5     
 6     <solid android:color="#F9FAFB" />
 7     
 8     <corners android:radius="10dp" />
 9     
10     <padding 
11         android:top="10dp" 
12         android:bottom="10dp"/>
13 
14 </shape>

bg_edittext

strings

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <resources>
 3 
 4     <string name="app_name">qqloginnew</string>
 5     <string name="action_settings">Settings</string>
 6     <string name="button">登录</string>
 7     <string name="faillogin">无法登录?</string>
 8     <string name="regist">新用户注册</string>
 9     <string name="inaccount">QQ号/手机号/邮箱</string>
10     <string name="inpwd">密码</string>
11     <string name="sucess">登录成功</string>
12 
13 </resources>

strings

MainActivity （问题3、4.....）

  1 package com.dragon.android.qqloginnew;
  2 
  3 import android.app.Activity;
  4 import android.os.Bundle;
  5 import android.text.Editable;
  6 import android.text.TextWatcher;
  7 import android.view.View;
  8 import android.view.View.OnClickListener;
  9 import android.view.View.OnFocusChangeListener;
 10 import android.widget.Button;
 11 import android.widget.EditText;
 12 
 13 public class MainActivity extends Activity {
 14     private EditText editText1;
 15     private EditText editText2;
 16     // private Button button;
 17     private Button clearButton1;
 18     private Button clearButton2;
 19 
 20     // 得到strings中的属性
 21     // private String string2 = getResources().getString(R.string.inaccount);
 22 
 23     @Override
 24     protected void onCreate(Bundle savedInstanceState) {
 25         super.onCreate(savedInstanceState);
 26         setContentView(R.layout.fragment_main);
 27 
 28         editText1 = (EditText) findViewById(R.id.editText1);
 29         editText2 = (EditText) findViewById(R.id.editText2);
 30 
 31         // button = (Button) findViewById(R.id.button1);
 32         clearButton1 = (Button) findViewById(R.id.button2);
 33         clearButton2 = (Button) findViewById(R.id.button3);
 34 
 35         // 对EditText进行焦点变更监听
 36         editText1.setOnFocusChangeListener(new EditTextListener(clearButton1));
 37         editText2.setOnFocusChangeListener(new EditTextListener(clearButton2));
 38 
 39         // 对清空按钮进行点击监听
 40         clearButton1.setOnClickListener(new ClearButtonListener());
 41         clearButton2.setOnClickListener(new ClearButtonListener());
 42 
 43         // 对EditText进行编辑监听
 44         editText1.addTextChangedListener(new MyEditTextWatcher(editText1));
 45         editText2.addTextChangedListener(new MyEditTextWatcher(editText2));
 46     }
 47 
 48     /**
 49      * 对EditText的内容进行实时监控
 50      * 
 51      * @author Auser
 52      * 
 53      */
 54     class MyEditTextWatcher implements TextWatcher {
 55         private CharSequence temp;
 56         private EditText editText;
 57 
 58         public MyEditTextWatcher(EditText editText) {
 59             this.editText = editText;
 60         }
 61 
 62         @Override
 63         // int start开始的位置, int count被改变的旧内容数, int after改变后的内容数量
 64         public void beforeTextChanged(CharSequence s, int start, int count,
 65                 int after) {
 66             // 这里的s表示改变之前的内容，通常start和count组合，可以在s中读取本次改变字段中被改变的内容。而after表示改变后新的内容的数量。
 67         }
 68 
 69         @Override
 70         // int start开始的位置, int before改变前的内容数量, int count新增量
 71         public void onTextChanged(CharSequence s, int start, int before,
 72                 int count) {
 73             // 这里的s表示改变之后的内容，通常start和count组合，可以在s中读取本次改变字段中新的内容。而before表示被改变的内容的数量。
 74             temp = s;
 75         }
 76 
 77         @Override
 78         // 表示最终内容
 79         public void afterTextChanged(Editable s) {
 80             if (temp.length() > 0) {
 81                 // 设置清空按钮为可见
 82                 if (editText == editText1) {
 83                     clearButton1.setVisibility(View.VISIBLE);
 84                 } else if (editText == editText2) {
 85                     clearButton2.setVisibility(View.VISIBLE);
 86                 }
 87             } else {
 88                 // 设置清空按钮不可见
 89                 if (editText == editText1) {
 90                     clearButton1.setVisibility(View.INVISIBLE);
 91                 } else if (editText == editText2) {
 92                     clearButton2.setVisibility(View.INVISIBLE);
 93                 }
 94             }
 95         }
 96     }
 97 
 98     /**
 99      * 清空按钮点击事件
100      * 
101      * @author
102      * 
103      */
104     class ClearButtonListener implements OnClickListener {
105 
106         @Override
107         public void onClick(View view) {
108             if (view == clearButton1) {
109                 editText1.setText("");
110             } else if (view == clearButton2) {
111                 editText2.setText("");
112             }
113         }
114     }
115 
116     /**
117      * 焦点变更事件
118      * 
119      * @author Auser
120      * 
121      */
122     class EditTextListener implements OnFocusChangeListener {
123         private Button clear;
124 
125         public EditTextListener(Button clear) {
126             this.clear = clear;
127         }
128 
129         @Override
130         public void onFocusChange(View v, boolean hasFocus) {
131             EditText textView = (EditText) v;
132             String hint;
133             if (hasFocus) {
134                 // 当获取焦点时如果内容不为空则清空按钮可见
135                 if (!textView.getText().toString().equals("")) {
136                     clear.setVisibility(View.VISIBLE);
137                 }
138                 // if (textView == editText2) {
139                 // // 设置输入格式为不可见的密码格式
140                 // textView.setInputType(InputType.TYPE_CLASS_TEXT
141                 // | InputType.TYPE_TEXT_VARIATION_PASSWORD);
142                 // }
143                 hint = textView.getHint().toString();
144                 // 给TextView添加额外的数据
145                 textView.setTag(hint);
146                 textView.setHint("");
147             } else {
148                 // 当失去焦点时清空按钮不可见
149                 clear.setVisibility(View.INVISIBLE);
150                 // if (textView == editText2) {
151                 // // 设置输入格式为可见的密码格式
152                 // textView.setInputType(InputType.TYPE_CLASS_TEXT
153                 // | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
154                 // }
155                 // 取出之前添加的额外数据
156                 hint = textView.getTag().toString();
157                 textView.setHint(hint);
158             }
159         }
160     }
161 }

 

 

图片素材

              a.png        clear.png

 

-------------------------一个初步的登录界面------------------------