Android 自定义EditText输入框带清空按钮

package com.example.myedittexttest;import android.content.Context;import android.graphics.Rect;import android.graphics.drawable.Drawable;import android.text.Editable;import android.text.TextWatcher;import android.util.AttributeSet;import android.view.MotionEvent;import android.widget.EditText;public class MyEditText extends EditText {private final String TAG = "MyEditText";private Drawable dRight;private Rect rBounds;public MyEditText(Context paramContext) {super(paramContext);initEditText();}public MyEditText(Context paramContext, AttributeSet paramAttributeSet) {super(paramContext, paramAttributeSet);initEditText();}public MyEditText(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {super(paramContext, paramAttributeSet, paramInt);initEditText();}// 初始化edittext 控件private void initEditText() {setEditTextDrawable();addTextChangedListener(new TextWatcher() { // 对文本内容改变进行监听@Overridepublic void afterTextChanged(Editable paramEditable) {}@Overridepublic void beforeTextChanged(CharSequence paramCharSequence, int paramInt1, int paramInt2, int paramInt3) {}@Overridepublic void onTextChanged(CharSequence paramCharSequence, int paramInt1, int paramInt2, int paramInt3) {MyEditText.this.setEditTextDrawable();}});}// 控制图片的显示public void setEditTextDrawable() {if (getText().toString().length() == 0) {setCompoundDrawables(null, null, null, null);} else {setCompoundDrawables(null, null, this.dRight, null);}}@Overrideprotected void onDetachedFromWindow() {super.onDetachedFromWindow();this.dRight = null;this.rBounds = null;}@Overridepublic boolean onTouchEvent(MotionEvent paramMotionEvent) {if ((this.dRight != null) && (paramMotionEvent.getAction() == 1)) {this.rBounds = this.dRight.getBounds();int i = (int) paramMotionEvent.getRawX();// 距离屏幕的距离// int i = (int) paramMotionEvent.getX();//距离边框的距离if (i > getRight() - 3 * this.rBounds.width()) {setText("");paramMotionEvent.setAction(MotionEvent.ACTION_CANCEL);}}return super.onTouchEvent(paramMotionEvent);}@Overridepublic void setCompoundDrawables(Drawable paramDrawable1, Drawable paramDrawable2, Drawable paramDrawable3, Drawable paramDrawable4) {if (paramDrawable3 != null)this.dRight = paramDrawable3;super.setCompoundDrawables(paramDrawable1, paramDrawable2, paramDrawable3, paramDrawable4);}}