Android獲取EditText行數後每插入新行

Question

由以下代碼我試圖顯示EditText行數插入新行後，此代碼工作罰款僅適用於第一個新行，然後，對於每個類型字符EditText我插入新行登錄LogCat

editText.addTextChangedListener(new TextWatcher() { 
    @Override 
    public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
    } 
    @Override 
    public void onTextChanged(CharSequence text, int start, int before, int count) { 
     if (-1 != text.toString().indexOf("\n")) { 
      Log.e("new line ", "enter new line" + ""); 
     } 
    } 
    @Override 
    public void afterTextChanged(Editable s) { 
    } 
}); 

Answer 1

試試這個。

editText.addTextChangedListener(new TextWatcher() { 
    @Override 
    public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
    } 
    @Override 
    public void onTextChanged(CharSequence text, int start, int before, int count) { 
     String insertedString = text.toString(); 
     if (text.length() > 0 && insertedString.substring(insertedString.length() - 1).equals("\n")) { 
      Log.e("new line ", "enter new line " + (channelMessageBox.getLineCount() - 1)); 
     } 
    } 
    @Override 
    public void afterTextChanged(Editable s) { 
    } 
}); 

Answer 2

你要算換行符：

int counter = 0; 

editText.addTextChangedListener(new TextWatcher() { 
    @Override 
    public void beforeTextChanged(CharSequence s, int start, int count, int after) { 
    } 
    @Override 
    public void onTextChanged(CharSequence text, int start, int before, int count) { 
     if(before==0) { 
      counter = 0; 
      for (int i = 0; i < text.toString().length(); i++) { 
       if (text.toString().charAt(i) == '\n') { 
        counter++; 
       } 
      } 
     } 
     Log.e("total new line ", "counter: " + counter); 
    } 
    @Override 
    public void afterTextChanged(Editable s) { 
    } 
});