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Android QQ登录界面绘制代码

时间:2022-09-26 09:33:35 | 栏目:Android代码 | 点击:

本文实例为大家分享了Android QQ登录界面绘制的具体代码,供大家参考,具体内容如下

先看看效果图:

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>

Button 和 EditText 的背景(问题1)

1.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="#00ACED" />
 
 <solid android:color="#00ACED" />
 
 <corners android:radius="10dp" />
 
</shape>

2.bg_edittext

<?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>

3.strings

<?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>

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);
  }
 }
 }
}

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