<!-- android:focusable="true" 
  android:focusableInTouchMode="true" 
  把EditText默認(rèn)的行為截?cái)嗔耍?-->
<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

<?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">登錄</string>
 <string name="faillogin">無法登錄?</string>
 <string name="regist">新用戶注冊(cè)</string>
 <string name="inaccount">QQ號(hào)/手機(jī)號(hào)/郵箱</string>
 <string name="inpwd">密碼</string>
 <string name="sucess">登錄成功</string>
</resources>
strings

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中的屬性
// 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);
// 對(duì)EditText進(jìn)行焦點(diǎn)變更監(jiān)聽
editText1.setOnFocusChangeListener(new EditTextListener(clearButton1));
editText2.setOnFocusChangeListener(new EditTextListener(clearButton2));
// 對(duì)清空按鈕進(jìn)行點(diǎn)擊監(jiān)聽
clearButton1.setOnClickListener(new ClearButtonListener());
clearButton2.setOnClickListener(new ClearButtonListener());
// 對(duì)EditText進(jìn)行編輯監(jiān)聽
editText1.addTextChangedListener(new MyEditTextWatcher(editText1));
editText2.addTextChangedListener(new MyEditTextWatcher(editText2));
}
/**
* 對(duì)EditText的內(nèi)容進(jìn)行實(shí)時(shí)監(jiān)控
* 
* @author Auser
* 
*/
class MyEditTextWatcher implements TextWatcher {
private CharSequence temp;
private EditText editText;
public MyEditTextWatcher(EditText editText) {
this.editText = editText;
}
@Override
// int start開始的位置, int count被改變的舊內(nèi)容數(shù), int after改變后的內(nèi)容數(shù)量
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// 這里的s表示改變之前的內(nèi)容，通常start和count組合，可以在s中讀取本次改變字段中被改變的內(nèi)容。而after表示改變后新的內(nèi)容的數(shù)量。
}
@Override
// int start開始的位置, int before改變前的內(nèi)容數(shù)量, int count新增量
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// 這里的s表示改變之后的內(nèi)容，通常start和count組合，可以在s中讀取本次改變字段中新的內(nèi)容。而before表示被改變的內(nèi)容的數(shù)量。
temp = s;
}
@Override
// 表示最終內(nèi)容
public void afterTextChanged(Editable s) {
if (temp.length() > 0) {
// 設(shè)置清空按鈕為可見
if (editText == editText1) {
clearButton1.setVisibility(View.VISIBLE);
} else if (editText == editText2) {
clearButton2.setVisibility(View.VISIBLE);
}
} else {
// 設(shè)置清空按鈕不可見
if (editText == editText1) {
clearButton1.setVisibility(View.INVISIBLE);
} else if (editText == editText2) {
clearButton2.setVisibility(View.INVISIBLE);
}
}
}
}
/**
* 清空按鈕點(diǎn)擊事件
* 
* @author
* 
*/
class ClearButtonListener implements OnClickListener {
@Override
public void onClick(View view) {
if (view == clearButton1) {
editText1.setText("");
} else if (view == clearButton2) {
editText2.setText("");
}
}
}
/**
* 焦點(diǎn)變更事件
* 
* @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) {
// 當(dāng)獲取焦點(diǎn)時(shí)如果內(nèi)容不為空則清空按鈕可見
if (!textView.getText().toString().equals("")) {
clear.setVisibility(View.VISIBLE);
}
// if (textView == editText2) {
// // 設(shè)置輸入格式為不可見的密碼格式
// textView.setInputType(InputType.TYPE_CLASS_TEXT
// | InputType.TYPE_TEXT_VARIATION_PASSWORD);
// }
hint = textView.getHint().toString();
// 給TextView添加額外的數(shù)據(jù)
textView.setTag(hint);
textView.setHint("");
} else {
// 當(dāng)失去焦點(diǎn)時(shí)清空按鈕不可見
clear.setVisibility(View.INVISIBLE);
// if (textView == editText2) {
// // 設(shè)置輸入格式為可見的密碼格式
// textView.setInputType(InputType.TYPE_CLASS_TEXT
// | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
// }
// 取出之前添加的額外數(shù)據(jù)
hint = textView.getTag().toString();
textView.setHint(hint);
}
}
}
}