Android---3种方式限制EditView输入字数（转载）_移动开发_编程开发_程序员俱乐部

 方法一：利用TextWatcher

1. editText.addTextChangedListener(new TextWatcher() {  
2.            private CharSequence temp;  
3.            private boolean isEdit = true;  
4.            private int selectionStart ;  
5.            private int selectionEnd ;  
6.            @Override  
7.            public void beforeTextChanged(CharSequence s, int arg1, int arg2,  
8.                    int arg3) {  
9.                temp = s;  
10.            }  
11.              
12.            @Override  
13.            public void onTextChanged(CharSequence s, int arg1, int arg2,  
14.                    int arg3) {  
15.            }  
16.              
17.            @Override  
18.            public void afterTextChanged(Editable s) {  
19.                 selectionStart = editText.getSelectionStart();  
20.                selectionEnd = editText.getSelectionEnd();  
21.                Log.i("gongbiao1",""+selectionStart);  
22.                if (temp.length() > Constant.TEXT_MAX) {  
23.                    Toast.makeText(KaguHomeActivity.this,  
24.                            R.string.edit_content_limit, Toast.LENGTH_SHORT)  
25.                            .show();  
26.                    s.delete(selectionStart-1, selectionEnd);  
27.                    int tempSelection = selectionStart;  
28.                    editText.setText(s);  
29.                    editText.setSelection(tempSelection);  
30.                }  
31.            }  
32.   
33.   
34.        });  

方法二：利用InputFilter

1. editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(100)});  //其中100最大输入字数  

方法三：在XML中设定

1. <EditText  
2.     .  
3.     .  
4.     .  
5.     android:maxLength="100"  
6. />  

从MS平台过来的，有些东西还真是不习惯自己做