带删除按钮的EditText

来源：互联网发布：golang random int 编辑：程序博客网时间：2024/05/16 19:36

经常见到EditText的后面带着一个小的“x”，可以把EditText输入的内容清空，这是一个即使用又简单的功能，我们一起来重写一下EditText来实现这个功能：

public class EdittextWithDel extends EditText {    private final static String TAG = "EditTextWithDel";    private Drawable imgInable;    private Drawable imgAble;    private Context mContext;    public EdittextWithDel(Context context) {        super(context);        mContext = context;        init();    }    public EdittextWithDel(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        mContext = context;        init();    }    public EdittextWithDel(Context context, AttributeSet attrs) {        super(context, attrs);        mContext = context;        init();    }    private void init() {        imgAble = mContext.getResources().getDrawable(                R.mipmap.icon_delete_gray);        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();            }        });        setDrawable();    }    // 设置删除图片    private void setDrawable() {        if (length() < 1) {            setCompoundDrawablesWithIntrinsicBounds(null, null, null, null);        } else {            setCompoundDrawablesWithIntrinsicBounds(null, null, imgAble, null);        }    }    // 处理删除事件    @Override    public boolean onTouchEvent(MotionEvent event) {        if (imgAble != null && event.getAction() == MotionEvent.ACTION_UP) {            int eventX = (int) event.getRawX();            int eventY = (int) event.getRawY();            Log.e(TAG, "eventX = " + eventX + "; eventY = " + eventY);            Rect rect = new Rect();            getGlobalVisibleRect(rect);            rect.left = rect.right - 50;            if (rect.contains(eventX, eventY))                setText("");        }        return super.onTouchEvent(event);    }    @Override    protected void finalize() throws Throwable {        super.finalize();    }}

当然为了美观，我们也为EditText的外围加一个框：

<?xml version="1.0" encoding="utf-8"?><!--定义一个带圆角,白色背景,绿色边框的矩形--><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="rectangle">    <!--填充颜色-->    <solid android:color="#F0F0F0" />    <!--描边-->    <stroke        android:width="1dp"        android:color="#DEDEDE" /></shape>

然后给上那个小“x”的图片：

大功告成。

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