EidtText设置字数输入限制的代码

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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

Xml代码
<EditText
    .
    .
    .
    Android:maxLength="100"
/>

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