Android---3种方式限制EditView输入字数

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. "gongbiao1",""+selectionStart);     
22. if (temp.length() > Constant.TEXT_MAX) {     
23. this,     
24.                            R.string.edit_content_limit, Toast.LENGTH_SHORT)     
25.                            .show();     
26. 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

android:maxLength="100"