Android---3种方式限制EditView输入字数

 方法一：利用TextWatcher

editText.addTextChangedListener(new TextWatcher() {
           private CharSequence temp;
           private boolean isEdit = true;
           private int selectionStart ;
           private int selectionEnd ;
           @Override
           public void beforeTextChanged(CharSequence s, int arg1, int arg2,
                   int arg3) {
               temp = s;
           }

           @Override
           public void onTextChanged(CharSequence s, int arg1, int arg2,
                   int arg3) {
           }

           @Override
           public void afterTextChanged(Editable s) {
                selectionStart = editText.getSelectionStart();
               selectionEnd = editText.getSelectionEnd();
               Log.i("gongbiao1",""+selectionStart);
               if (temp.length() > Constant.TEXT_MAX) {
                   Toast.makeText(KaguHomeActivity.this,
                           R.string.edit_content_limit, Toast.LENGTH_SHORT)
                           .show();
                   s.delete(selectionStart-1, selectionEnd);
                   int tempSelection = selectionStart;
                   editText.setText(s);
                   editText.setSelection(tempSelection);
               }
           }


       });

 

方法二：利用InputFilter

    

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

<EditText
    .
    .
    .
    android:maxLength="100"
/>

从MS平台过来的，有些东西还真是不习惯自己做