如題目所示，非常詭異的問題，EditText只能輸入但是卻不能刪除！

1. @Override
2.     public InputConnection onCreateInputConnection(EditorInfo outAttrs) {  
3.         returnnew ZanyInputConnection(super.onCreateInputConnection(outAttrs),true);  
4.     }  
5.     privateclass ZanyInputConnection extends InputConnectionWrapper {  
6.         public
    ZanyInputConnection(InputConnection target, boolean mutable) {  
7.             super(target, mutable);  
8.         }  
9.         @Override
10.         publicboolean sendKeyEvent(KeyEvent event) {  
11.             if (event.getAction() == KeyEvent.ACTION_DOWN && event.getKeyCode() == KeyEvent.KEYCODE_DEL) {  
12.                 ClearEditTextView edit = ClearEditTextView.this;  
13.                 String text = edit.getText().toString();  
14.                 if(text.length() > 0){  
15.                     String newText = text.substring(0,text.length() - 1);  
16.                     edit.setText(newText);  
17.                     Selection.setSelection(edit.getText(), newText.length());  
18.                 }  
19.                 returnfalse;  
20.             }  
21.             returnsuper.sendKeyEvent(event);  
22.         }  
23.     }  

下面還有人補充說，在WebView中使用EditText的時候，也會有問題，還要重寫一個deleteSurroundingText()方法：

1. @Override
2. publicboolean deleteSurroundingText(int beforeLength, int afterLength) {         
3.     // magic: in latest Android, deleteSurroundingText(1, 0) will be called for backspace
4.     if (beforeLength == 1 && afterLength == 0) {  
5.         // backspace
6.         returnsuper.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_DEL))  
7.             && super.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_DEL));  
8.     }  
9.     returnsuper.deleteSurroundingText(beforeLength, afterLength);  
10. }  

今天才發現，是他媽的在底層註冊了OnKeyListener，然後很霸氣的直接返回了true。奇葩啊！