<!-- android:focusable="true"   android:focusableInTouchMode="true"   把EditText默認的行為截斷了！ --><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

<?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</string> <string name="inaccount">QQ號/手機號/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);@Overrideprotected 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EditText進行焦點變更監聽editText1.setOnFocusChangeListener(new EditTextListener(clearButton1));editText2.setOnFocusChangeListener(new EditTextListener(clearButton2));// 對清空按鈕進行點擊監聽clearButton1.setOnClickListener(new ClearButtonListener());clearButton2.setOnClickListener(new ClearButtonListener());// 對EditText進行編輯監聽editText1.addTextChangedListener(new MyEditTextWatcher(editText1));editText2.addTextChangedListener(new MyEditTextWatcher(editText2));}/*** 對EditText的內容進行實時監控* * @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被改變的舊內容數, int after改變后的內容數量public void beforeTextChanged(CharSequence s, int start, int count,int after) {// 這里的s表示改變之前的內容，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容。而after表示改變后新的內容的數量。}@Override// int start開始的位置, int before改變前的內容數量, 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容。而before表示被改變的內容的數量。temp = s;}@Override// 表示最終內容public void afterTextChanged(Editable s) {if (temp.length() > 0) {// 設置清空按鈕為可見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);}}}}/*** 清空按鈕點擊事件* * @author* */class ClearButtonListener implements OnClickListener {@Overridepublic void onClick(View view) {if (view == clearButton1) {editText1.setText("");} else if (view == clearButton2) {editText2.setText("");}}}/*** 焦點變更事件* * @author Auser* */class EditTextListener implements OnFocusChangeListener {private Button clear;public EditTextListener(Button clear) {this.clear = clear;}@Overridepublic void onFocusChange(View v, boolean hasFocus) {EditText textView = (EditText) v;String hint;if (hasFocus) {// 當獲取焦點時如果內容不為空則清空按鈕可見if (!textView.getText().toString().equals("")) {clear.setVisibility(View.VISIBLE);}// if (textView == editText2) {// // 設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添加額外的數據textView.setTag(hint);textView.setHint("");} else {// 當失去焦點時清空按鈕不可見clear.setVisibility(View.INVISIBLE);// if (textView == editText2) {// // 設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據hint = textView.getTag().toString();textView.setHint(hint);}}}}