可清空文本的EditText

代码如下：

 1 public class DeleteEditText extends EditText {
 2
 3     private Context mContext;
 4
 5     //删除图标
 6     private Drawable drawableDelete;
 7
 8     public DeleteEditText(Context context) {
 9         super(context);
10         mContext = context;
11         init();
12     }
13
14     public DeleteEditText(Context context, AttributeSet attrs) {
15         super(context, attrs);
16         mContext = context;
17         init();
18     }
19
20     public DeleteEditText(Context context, AttributeSet attrs, int defStyleAttr) {
21         super(context, attrs, defStyleAttr);
22         mContext = context;
23         init();
24     }
25
26
27     private void init() {
28         drawableDelete = mContext.getResources().getDrawable(R.drawable.ic_inputbox_clear);
29         drawableDelete.setBounds(0, 0, drawableDelete.getIntrinsicWidth(), drawableDelete.getIntrinsicHeight());
30         addTextChangedListener(new TextWatcher() {
31             @Override
32             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
33
34             }
35
36             @Override
37             public void onTextChanged(CharSequence s, int start, int before, int count) {
38
39             }
40
41             @Override
42             public void afterTextChanged(Editable s) {
43                 setIcon(length() > 0);
44             }
45         });
46         setIcon(false);
47     }
48
49     @Override
50     public boolean onTouchEvent(MotionEvent event) {
51         if (drawableDelete != null && event.getAction() == MotionEvent.ACTION_UP) {
52             //获取触摸点坐标
53             int eventX = (int) event.getRawX();
54             int eventY = (int) event.getRawY();
55             //获取整个EdtiText的可见区域
56             Rect rect = new Rect();
57             getGlobalVisibleRect(rect);
58             //修改区域为图标区域
59             rect.left = rect.right - 80;
60             if (rect.contains(eventX, eventY)) {
61                 //触摸点在图标区域，清空文本
62                 setText("");
63             }
64         }
65         return super.onTouchEvent(event);
66     }
67
68     //根据是否有内容来绘制图标
69     private void setIcon(boolean visible) {
70         Drawable right = visible ? drawableDelete : null;
71         setCompoundDrawables(getCompoundDrawables()[0], getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
72     }
73 }