在开发过程中不可避免的总会遇到比如登录注册、用户信息修改等，这时候又是不可避免的会用到EditText控件。这个控件的使用频率虽然几乎类似我们吃饭用“筷子”的频率，but能不能用出花样，用的有技术就看你有没有下功夫喽。

代码实现：

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.View;
import android.widget.EditText;
 
import com.ktc.sczwdemo.R;
import com.ktc.utils.ResUtils;
 
/**
 * @Date 2016-5-13 下午2:23:23
 * @Author Arvin
 * @Description 可删除且带有drawableLeft的EditText
 */ 
public class EditWithDelView extends EditText {
    private final static String TAG = "EditWithDelView";
    private Drawable imgDisable;
    private Drawable imgAble;
    private Context mContext;
 
    public EditWithDelView(Context context) {
        super(context);
        mContext = context;
        init();
    }
 
    public EditWithDelView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        mContext = context;
        init();
    }
 
    public EditWithDelView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        init();
    }
     
    private void init() {
        imgAble = ResUtils.getDrawable(R.drawable.delete);
        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) {
                setDrawable();
            }
        });
         
        this.setOnFocusChangeListener(new OnFocusChangeListener() {
             
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                // TODO Auto-generated method stub
                if(hasFocus&&length()>=1){
                    setCompoundDrawablesWithIntrinsicBounds(getCompoundDrawables()[0], null, imgAble, null);
                }else{
                    setCompoundDrawablesWithIntrinsicBounds(getCompoundDrawables()[0], null, null, null);
                }
            }
        });
    }
     
    //根据字符长度加载提示Drawable
    private void setDrawable() {
        if(length() < 1){
            setCompoundDrawablesWithIntrinsicBounds(getCompoundDrawables()[0], null, null, null);
        }else if(isFocused()){
            setCompoundDrawablesWithIntrinsicBounds(getCompoundDrawables()[0], null, imgAble, null);
        }
    }
     
     //响应触摸点击事件
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (imgAble != null && event.getAction() == MotionEvent.ACTION_UP) {
            int eventX = (int) event.getRawX();
            int eventY = (int) event.getRawY();
            Rect rect = new Rect();
            getGlobalVisibleRect(rect);
            rect.left = rect.right - 50;
            rect.top = rect.bottom - 50;
            if(rect.contains(eventX, eventY)){ 
                setText("");
                setCompoundDrawablesWithIntrinsicBounds(getCompoundDrawables()[0], null, null, null);
            }
        }
        return super.onTouchEvent(event);
    }
 
    @Override
    protected void finalize() throws Throwable {
        super.finalize();
    }
}

里面可根据需要替换imgDisable和imgAble两个资源。

• 使用方法：在Xml中像普通EditText一样直接引用即可

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