1. 自定義view

package com.example.xingchouwang.view.customView;

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.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText;

import com.example.xingchouwang.R;


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

    /**
     * 刪除按鈕的引用
     */
    private Drawable mClearDrawable;

    public ClearWriteEditText(Context context) {
        this(context, null);
    }

    public ClearWriteEditText(Context context, AttributeSet attrs) {
        //這里構造方法也很重要，不加這個很多屬性不能再XML里面定義
        this(context, attrs, android.R.attr.editTextStyle);
    }

    public ClearWriteEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        mClearDrawable = getResources().getDrawable(R.mipmap.search_clear_pressed_write);
        mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight());
        setClearIconVisible(false);
        this.setOnFocusChangeListener(this);
        this.addTextChangedListener(this);
    }

    /**
     * 當輸入框里面內容發生變化的時候回調的方法
     */
    @Override
    public void onTextChanged(CharSequence s, int start, int count, int after) {
        setClearIconVisible(s.length() > 0);
    }


    /**
     * 設置清除圖標的顯示與隱藏，調用setCompoundDrawables為EditText繪制上去
     * @param visible
     */
    protected void setClearIconVisible(boolean visible) {
        Drawable right = visible ? mClearDrawable : null;
        setCompoundDrawables(getCompoundDrawables()[0],
                             getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
    }

    /**
     * 因為我們不能直接給EditText設置點擊事件，所以我們用記住我們按下的位置來模擬點擊事件
     * 當我們按下的位置 在  EditText的寬度 - 圖標到控件右邊的間距 - 圖標的寬度  和
     * EditText的寬度 - 圖標到控件右邊的間距之間我們就算點擊了圖標，豎直方向沒有考慮
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (getCompoundDrawables()[2] != null) {
            if (event.getAction() == MotionEvent.ACTION_UP) {
                boolean touchable = event.getX() > (getWidth()
                                                    - getPaddingRight() - mClearDrawable.getIntrinsicWidth())
                                    && (event.getX() < ((getWidth() - getPaddingRight())));
                if (touchable) {
                    this.setText("");
                }
            }
        }

        return super.onTouchEvent(event);
    }

    /**
     * 當ClearEditText焦點發生變化的時候，判斷里面字符串長度設置清除圖標的顯示與隱藏
     */
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            setClearIconVisible(getText().length() > 0);
        } else {
            setClearIconVisible(false);
        }
    }

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

    }

    @Override
    public void afterTextChanged(Editable s) {

    }

    /**
     * 設置晃動動畫
     */
    public void setShakeAnimation() {
        this.startAnimation(shakeAnimation(3));
    }



    /**
     * 晃動動畫
     * @param counts 半秒鐘晃動多少下
     * @return
     */
    public static Animation shakeAnimation(int counts) {
        Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
        translateAnimation.setInterpolator(new CycleInterpolator(counts));
        translateAnimation.setDuration(500);
        return translateAnimation;
    }

    public Drawable getClearDrawable() {
        return mClearDrawable;
    }

    public void setClearDrawable(Drawable mClearDrawable) {
        this.mClearDrawable = mClearDrawable;
    }
}

2. 使用

 <!--輸入框-->
            <com.example.xingchouwang.view.customView.ClearWriteEditText
                android:id="@+id/login_et_name"
                style="@style/style_edittext"
                android:layout_width="match_parent"
                android:layout_marginLeft="@dimen/x3"
                android:layout_marginRight="@dimen/x3"
                android:layout_toRightOf="@id/iv_syncOperatorImg"
                android:hint="手機號"
                android:imeOptions="actionNext"
                android:inputType="number"
                android:paddingLeft="@dimen/y6" />