獲取TextView的值，在單擊按鈕時更新片段，並調用onClickListener

Question

如何從相同片段的按鈕的onclickListner更新片段的文本視圖。

@Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, 
       Bundle savedInstanceState) { 
      View rootView = inflater.inflate(
        R.layout.fragment_practicing_alphabet, container, false); 
      TextView singleAlphabet=(TextView) rootView.findViewById(R.id.single_alphabet); 
      ImageButton previousImage=(ImageButton) rootView.findViewById(R.id.btn_backward_arrow); 

previousImage.setOnClickListener(new OnClickListener(){ 
       public void onClick(View v) 
       { 
        String tempAlphaString=(String) singleAlphabet.getText(); 
        char tempAlphaChar=(char) (tempAlphaString.charAt(0)+1); 
        singleAlphabet.setText(tempAlphaChar); 

       }}); 

訪問singleAlphabet TextView的，當我得到一個編譯錯誤，如何acees TextView的和請給我一些想法如何更新的TextView。

Answer 1

嘗試訪問的TextView像下面的代碼：

String tempAlphaString= single_Alphabet.getText().toString(); 

可以更新的TextView通過

single_Alphabet.setText("your text");