自定义EditText，带删除按键

带清空按键，还可左右加图片，默认的是加了清空图片。

清空内容是判断的手势点击EditText的范围。

自定义EditText代码如下：

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.EditText;

/**
 * Created by Administrator on 2014/9/15.
 */

    public class ClearEditText extends EditText implements TextWatcher,
        View.OnFocusChangeListener {

        /**
         * 左右两侧图片资源
         */
        private Drawable left, right;

        /** 

         * 添加 ClearListener 可以实现搜索下面界面数据的清空

         */ 

        private ClearListener mClearListener;
        /**
         * 是否获取焦点，默认没有焦点
         */
        private boolean hasFocus = false;
        /**
         * 手指抬起时的X坐标
         */
        private int xUp = 0;

        private boolean hasMyListener = false;

        public interface ClearListener{
            public void doChange();
        }

       public void setMyListener(ClearListener clearListener){

        mClearListener = clearListener;
        hasMyListener = true;
       }

    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 defStyle) {
            super(context, attrs, defStyle);
            initWedgits();
        }

        private void initWedgits() {
            try {
                // 获取drawableLeft图片，如果在布局文件中没有定义drawableLeft属性，则此值为空
                left = getCompoundDrawables()[0];
                // 获取drawableRight图片，如果在布局文件中没有定义drawableRight属性，则此值为空
                right = getCompoundDrawables()[2];
                initDatas();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        /**
         * 初始化数据
         */
        private void initDatas() {
            try {
                // 第一次显示，隐藏删除图标
                setCompoundDrawablesWithIntrinsicBounds(left, null, null, null);
                addListeners();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        /**
         * 添加事件监听
         */
        private void addListeners() {
            try {
                setOnFocusChangeListener(this);
                addTextChangedListener(this);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                                      int after) {
        }

        @Override
            public void onTextChanged(CharSequence s, int start, int before, int after) {
                if (hasFocus) {
                    if (TextUtils.isEmpty(s)) {
                        // 如果为空，则不显示删除图标
                        setCompoundDrawablesWithIntrinsicBounds(left, null, null, null);

                        if(hasMyListener){
                            mClearListener.doChange();
                        }
                    } else {
                        // 如果非空，则要显示删除图标
                        if (null == right) {
                            right = getCompoundDrawables()[2];
                        }
                        setCompoundDrawablesWithIntrinsicBounds(left, null, right, null);
                    }
                }
        }

    @Override
        public boolean onTouchEvent(MotionEvent event) {
            try {
                switch (event.getAction()) {
                    case MotionEvent.ACTION_UP:
                        // 获取点击时手指抬起的X坐标
                        xUp = (int) event.getX();
                        // 当点击的坐标到当前输入框右侧的距离小于等于getCompoundPaddingRight()的距离时，则认为是点击了删除图标
                        // getCompoundPaddingRight()的说明：Returns the right padding of the view, plus space for the right Drawable if any.
                        if ((getWidth() - xUp) <= getCompoundPaddingRight()) {
                            if (!TextUtils.isEmpty(getText().toString())) {
                                setText("");
                            }
                        }
                        break;
                    default:
                        break;
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return super.onTouchEvent(event);
        }

        @Override
        public void afterTextChanged(Editable s) {
        }

        @Override
        public void onFocusChange(View v, boolean hasFocus) {
            try {
                this.hasFocus = hasFocus;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

布局见中的实现：

<com.tuge.zonghengda_vector.widget.ClearEditText
              android:layout_toLeftOf="@id/search_button"
              android:layout_width="match_parent"
              android:layout_height="40dp"
              android:layout_centerVertical="true"
              android:layout_marginLeft="8dp"
              android:layout_marginRight="8dp"
              android:paddingLeft="8dp"
              android:paddingRight="8dp"
              android:hint="请输入运单号或订舱号"
              android:drawablePadding="8dp"
              android:textSize="16sp"
              android:textColorHint="#ffa9a9a9"
              android:singleLine="true"
              android:id="@+id/search_editText"
              android:drawableLeft="@drawable/ico_search_small"
              android:drawableRight="@drawable/text_clear_selector"
              android:background="@drawable/search_background"/>

ico_search_small：

text_clear_selector：

<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/ico_text_clear"/>
    <item android:drawable="@drawable/ico_text_clear_click"
          android:state_pressed="true"/>
    <item   android:state_focused="true" android:drawable="@drawable/ico_text_clear_click"/>

</selector>

ico_text_clear_click：

最后在代码中获取即可。