自定义EditText（带删除按钮）

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效果

这里写图片描述

ClearEditText

package com.example.testclearedittext;import android.annotation.SuppressLint;import android.content.Context;import android.graphics.drawable.Drawable;import android.text.Editable;import android.text.TextWatcher;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.view.View.OnFocusChangeListener;import android.widget.EditText;public class ClearEditText extends EditText implements OnFocusChangeListener,TextWatcher{    //  删除按钮    private Drawable mClearDrawable;    //  是否获得焦点    private boolean mHasFoucus = false;    public ClearEditText(Context context) {        this(context,null);    }    public ClearEditText(Context context, AttributeSet attrs) {        this(context,attrs,android.R.attr.editTextStyle);    }    public ClearEditText(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        init();    }    @SuppressWarnings("deprecation")    private void init() {        //  获取drawableRight,如果没有就使用默认的        mClearDrawable = getCompoundDrawables()[2];        if (mClearDrawable == null) {            mClearDrawable = getResources().getDrawable(R.drawable.ic_launcher);        }        //  ????? 注释了也没有影响//      mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight());        //  默认设置不可见        setClearIconVisiable(false);        //  设置焦点监听        setOnFocusChangeListener(this);        //  设置文字监听        addTextChangedListener(this);    }     /**      * 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件      * 当我们按下的位置 在  EditText的宽度 - 图标到控件右边的间距 - 图标的宽度  和      * EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向就没有考虑      */      @SuppressLint("ClickableViewAccessibility")    @Override    public boolean onTouchEvent(MotionEvent event) {        if (event.getAction() == MotionEvent.ACTION_UP) {            boolean flag = event.getX() > (getWidth() - getTotalPaddingRight()) && event.getX() < (getWidth() - getPaddingRight())                     ? true : false;            if (flag) {                setText("");            }        }        return super.onTouchEvent(event);    }    private void setClearIconVisiable(boolean b) {        Drawable right = b ? mClearDrawable : null;        setCompoundDrawables(getCompoundDrawables()[0], getCompoundDrawables()[1], right, getCompoundDrawables()[3]);    }    @Override    public void beforeTextChanged(CharSequence s, int start, int count,            int after) {        // TODO Auto-generated method stub    }    @Override    public void afterTextChanged(Editable s) {        // TODO Auto-generated method stub    }    @Override    public void onTextChanged(CharSequence s, int start, int before, int count) {        if (mHasFoucus) {            setClearIconVisiable(getText().length() > 0);        }    }    /*     *  监听焦点，如果获得焦点并且有输入的文字显示删除按钮,否则隐藏     */    @Override    public void onFocusChange(View v, boolean hasFocus) {        mHasFoucus = hasFocus;        if (hasFocus) {            setClearIconVisiable(getText().length() > 0);        } else {            setClearIconVisiable(false);        }    }}

XML

<LinearLayout     android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"     xmlns:android="http://schemas.android.com/apk/res/android">   <com.example.testclearedittext.ClearEditText       android:layout_marginTop="20dp"       android:layout_width="match_parent"       android:layout_height="60dp"       android:drawableLeft="@drawable/user"       android:drawableRight="@drawable/clearbutton"       android:hint="  用户名"       android:background="@drawable/rectangle_edittext"       android:textCursorDrawable="@null"       >   </com.example.testclearedittext.ClearEditText>    <com.example.testclearedittext.ClearEditText       android:layout_marginTop="20dp"       android:layout_width="match_parent"       android:layout_height="60dp"       android:drawableLeft="@drawable/password"       android:drawableRight="@drawable/clearbutton"       android:hint="  密码"       android:background="@drawable/rectangle_edittext"       android:textCursorDrawable="@null"       >   </com.example.testclearedittext.ClearEditText>    <!--  android:textCursorDrawable="@null"  解决不显示光标问题 --></LinearLayout>

rectangle_edittext.xml

<?xml version="1.0" encoding="utf-8"?>  <shape xmlns:android="http://schemas.android.com/apk/res/android"      android:shape="rectangle" >    <padding        android:bottom="7dp"       android:left="7dp"        android:right="7dp"        android:top="7dp" />    <!-- 设置圆角矩形 -->    <corners android:radius="50dp" />    <!-- 输入框背景颜色 -->     <solid android:color="#fff" /> </shape>

转载于http://blog.csdn.net/xiaanming/article/details/11066685

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