( 工具)带有删除功能的EditTex

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.view.animation.Animation;import android.view.animation.CycleInterpolator;import android.view.animation.TranslateAnimation;import android.widget.EditText;public class CleanEditText extends EditText {    private final String TAG = "editText";    private Drawable dRight;    private Rect rBound;    public CleanEditText(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        initEditText();    }    public CleanEditText(Context context, AttributeSet attrs) {        super(context, attrs);        initEditText();    }    public CleanEditText(Context context) {        super(context);        initEditText();    }    private void initEditText() {        setEditTextDrawable();        addTextChangedListener(new TextWatcher() {            @Override            public void onTextChanged(CharSequence s, int start, int before,                    int count) {            }            @Override            public void beforeTextChanged(CharSequence s, int start, int count,                    int after) {            }            @Override            public void afterTextChanged(Editable s) {                CleanEditText.this.setEditTextDrawable();            }        });    }    public void setEditTextDrawable() {        if (getText().toString().length() == 0) {            setCompoundDrawables(null, null, null, null);        } else {            setCompoundDrawables(null, null, this.dRight, null);        }    }    @Override    protected void onDetachedFromWindow() {        super.onDetachedFromWindow();        this.dRight = null;        this.rBound = null;    }    @Override    public boolean onTouchEvent(MotionEvent event) {        if ((this.dRight != null) && (event.getAction() == 1)) {            this.rBound = this.dRight.getBounds();            int i = (int) event.getRawX();            if (i > getRight() - 1 * this.rBound.width()) {                // 点击的位置聚焦                requestFocus();                setText("");                event.setAction(MotionEvent.ACTION_CANCEL);            }        }        return super.onTouchEvent(event);    }    @Override    protected void onFocusChanged(boolean focused, int direction,            Rect previouslyFocusedRect) {        if (focused) {            CleanEditText.this.setEditTextDrawable();        } else {            setCompoundDrawables(null, null, null, null);        }        super.onFocusChanged(focused, direction, previouslyFocusedRect);    }    @Override    public void setCompoundDrawables(Drawable left, Drawable top,            Drawable right, Drawable bottom) {        if (right != null) {            this.dRight = right;        }        super.setCompoundDrawables(left, top, right, bottom);    }    public void setShakeAnimation() {        this.setAnimation(shakeAnimation(5));    }    public static Animation shakeAnimation(int counts) {        Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);        translateAnimation.setInterpolator(new CycleInterpolator(counts));        translateAnimation.setDuration(500);        return translateAnimation;    }}