当前位置:主页 > 移动开发 > Android代码 >

Android实现QQ登录界面遇到问题及解决方法

时间:2020-10-30 16:13:41 | 栏目:Android代码 | 点击:

先给大家炫下效果图:

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)

<!-- android:focusable="true" 
  android:focusableInTouchMode="true" 
  把EditText默认的行为截断了! -->
<RelativeLayout 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:background="#ECEDF1"
 android:focusable="true"
 android:focusableInTouchMode="true"
 tools:context="com.dragon.android.qqlogin.MainActivity$PlaceholderFragment" >
 <ImageView
  android:id="@+id/imageView1"
  android:layout_width="70dp"
  android:layout_height="70dp"
  android:layout_centerHorizontal="true"
  android:layout_marginBottom="5dp"
  android:layout_marginTop="40dp"
  android:src="@drawable/a" />  
 <EditText
  android:id="@+id/editText1"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_below="@id/imageView1"
  android:ems="10"
  android:background="@drawable/bg_edittext"
  android:inputType="textPersonName"
  android:gravity="center"
  android:textColor="#6A6A6C"
  android:hint="@string/inaccount"
  android:textColorHint="#ECEDDD">
 </EditText>
 <EditText
  android:id="@+id/editText2"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_below="@id/editText1"
  android:ems="10"
  android:background="@drawable/bg_edittext"
  android:inputType="textPassword"
  android:gravity="center"
  android:textColor="#6A6A6C"
  android:hint="@string/inpwd"
  android:textColorHint="#ECEDDD" >
 </EditText>
 <Button
  android:id="@+id/button1"
  android:layout_width="match_parent"
  android:layout_height="40dp"
  android:layout_below="@id/editText2"
  android:layout_marginLeft="20dp"
  android:layout_marginRight="20dp"
  android:layout_marginTop="10dp"
  android:background="@drawable/bg_button"
  android:text="@string/button"
  android:gravity="center"
  android:textColor="#F9FAFB" />
 <LinearLayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_alignParentBottom="true"
  android:padding="10dp" >
  <TextView
   android:id="@+id/textView2"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:gravity="center"
   android:text="@string/faillogin"
   android:textColor="#0EB1EF" />
  <TextView
   android:id="@+id/textView3"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:gravity="right"
   android:text="@string/regist"
   android:textColor="#0EB1EF" /> 
 </LinearLayout>
 <Button
  android:id="@+id/button2"
  android:layout_width="16dp"
  android:layout_height="16dp"
  android:layout_alignTop="@id/editText1"
  android:layout_marginTop="15dp"
  android:layout_alignParentRight="true"
  android:layout_marginRight="10dp"
  android:background="@drawable/clear"
  android:visibility="invisible" />
 <Button
  android:id="@+id/button3"
  android:layout_width="16dp"
  android:layout_height="16dp"
  android:layout_alignTop="@id/editText2"
  android:layout_marginTop="15dp"
  android:layout_alignLeft="@+id/button2"
  android:background="@drawable/clear"
  android:visibility="invisible" />
</RelativeLayout>
fragment_main

Button 和 EditText 的背景(问题1)

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
 <stroke android:width="1px" android:color="#00ACED" />
 <solid android:color="#00ACED" />
 <corners android:radius="10dp" />
</shape>
bg_button
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
 <stroke android:width="1px" android:color="#ECEDF1" />
 <solid android:color="#F9FAFB" />
 <corners android:radius="10dp" />
 <padding 
  android:top="10dp" 
  android:bottom="10dp"/>
</shape>
bg_edittext
<?xml version="1.0" encoding="utf-8"?>
<resources>
 <string name="app_name">qqloginnew</string>
 <string name="action_settings">Settings</string>
 <string name="button">登录</string>
 <string name="faillogin">无法登录?</string>
 <string name="regist">新用户注册</string>
 <string name="inaccount">QQ号/手机号/邮箱</string>
 <string name="inpwd">密码</string>
 <string name="sucess">登录成功</string>
</resources>
strings

MainActivity (问题3、4.....)

package com.dragon.android.qqloginnew;
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
private EditText editText1;
private EditText editText2;
// private Button button;
private Button clearButton1;
private Button clearButton2;
// 得到strings中的属性
// private String string2 = getResources().getString(R.string.inaccount);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
editText1 = (EditText) findViewById(R.id.editText1);
editText2 = (EditText) findViewById(R.id.editText2);
// button = (Button) findViewById(R.id.button1);
clearButton1 = (Button) findViewById(R.id.button2);
clearButton2 = (Button) findViewById(R.id.button3);
// 对EditText进行焦点变更监听
editText1.setOnFocusChangeListener(new EditTextListener(clearButton1));
editText2.setOnFocusChangeListener(new EditTextListener(clearButton2));
// 对清空按钮进行点击监听
clearButton1.setOnClickListener(new ClearButtonListener());
clearButton2.setOnClickListener(new ClearButtonListener());
// 对EditText进行编辑监听
editText1.addTextChangedListener(new MyEditTextWatcher(editText1));
editText2.addTextChangedListener(new MyEditTextWatcher(editText2));
}
/**
* 对EditText的内容进行实时监控
* 
* @author Auser
* 
*/
class MyEditTextWatcher implements TextWatcher {
private CharSequence temp;
private EditText editText;
public MyEditTextWatcher(EditText editText) {
this.editText = editText;
}
@Override
// 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
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// 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。
}
@Override
// int start开始的位置, int before改变前的内容数量, int count新增量
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// 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。
temp = s;
}
@Override
// 表示最终内容
public void afterTextChanged(Editable s) {
if (temp.length() > 0) {
// 设置清空按钮为可见
if (editText == editText1) {
clearButton1.setVisibility(View.VISIBLE);
} else if (editText == editText2) {
clearButton2.setVisibility(View.VISIBLE);
}
} else {
// 设置清空按钮不可见
if (editText == editText1) {
clearButton1.setVisibility(View.INVISIBLE);
} else if (editText == editText2) {
clearButton2.setVisibility(View.INVISIBLE);
}
}
}
}
/**
* 清空按钮点击事件
* 
* @author
* 
*/
class ClearButtonListener implements OnClickListener {
@Override
public void onClick(View view) {
if (view == clearButton1) {
editText1.setText("");
} else if (view == clearButton2) {
editText2.setText("");
}
}
}
/**
* 焦点变更事件
* 
* @author Auser
* 
*/
class EditTextListener implements OnFocusChangeListener {
private Button clear;
public EditTextListener(Button clear) {
this.clear = clear;
}
@Override
public void onFocusChange(View v, boolean hasFocus) {
EditText textView = (EditText) v;
String hint;
if (hasFocus) {
// 当获取焦点时如果内容不为空则清空按钮可见
if (!textView.getText().toString().equals("")) {
clear.setVisibility(View.VISIBLE);
}
// if (textView == editText2) {
// // 设置输入格式为不可见的密码格式
// textView.setInputType(InputType.TYPE_CLASS_TEXT
// | InputType.TYPE_TEXT_VARIATION_PASSWORD);
// }
hint = textView.getHint().toString();
// 给TextView添加额外的数据
textView.setTag(hint);
textView.setHint("");
} else {
// 当失去焦点时清空按钮不可见
clear.setVisibility(View.INVISIBLE);
// if (textView == editText2) {
// // 设置输入格式为可见的密码格式
// textView.setInputType(InputType.TYPE_CLASS_TEXT
// | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
// }
// 取出之前添加的额外数据
hint = textView.getTag().toString();
textView.setHint(hint);
}
}
}
}

下篇文章给大家介绍Android实现QQ新用户注册界面遇到问题及解决方法,感兴趣的朋友可以参考下。

您可能感兴趣的文章:

相关文章