安卓減去從另一個

一個輸入我有2個對象安卓減去從另一個

obj.targetWeight = targetWeight.getText().toString(); 
obj.currentWeight = currentWeight.getText().toString();

我要減去一個從其他。

我試過這個沒有運氣。

if (obj != null){ 
    outputEditText.setText("Your target weight is " + obj.targetWeight + 
          "\n Your current weight is " + obj.currentWeight + "\n" 
         + (obj.currentWeight - obj.targetWeight)); 
}

我很確定這不是應該做的，但我不知道該怎麼做。

來源

2012-04-10 Tuffy G

請在下次改進您的問題。檢查拼寫和格式。謝謝 – WarrenFaith 2012-04-10 16:07:08

感謝您的輸入 – 2012-04-11 07:53:35

您必須先將它們轉換爲整數。

if (obj != null) { 
    int targetWeight = Integer.parseInt(obj.targetWeight.getText().toString()); 
    int currentWeight = Integer.parseInt(obj.currentWeight.getText().toString()); 
    outputEditText.setText(
     "Your target weight is " + obj.targetWeight + "\n" + 
     "Your current weight is " + obj.currentWeight + "\n" + 
     "Difference is " + (currentWeight - targetWeight)); 
    } 
}

來源

2012-04-10 15:44:45 kailoon

不幸的是，這並沒有做任何事情 – 2012-04-10 15:56:14

我已經添加了代碼示例，以顯示我輸入的代碼片段應該去哪裏以及如何使用它。如果這仍然不是你想要的，你能否更新你的問題：你的意思是不工作？ – kailoon 2012-04-10 16:04:30

嗨。感謝您的回覆。我在「（targetWeight.getText（）。toString（））上得到以下錯誤;無法在原始類型int」上調用getText（）（同樣適用於currentweight） – 2012-04-11 07:50:53

謝謝kailoon我有一個答案。

if (obj != null) { 
     int targetWeight = Integer.parseInt(obj.targetWeight); 
     int currentWeight = Integer.parseInt(obj.currentWeight); 
     outputEditText.setText(
      "Your target weight is " + obj.targetWeight + "\n" + 
      "Your current weight is " + obj.currentWeight + "\n" + 
      "Difference is " + (targetWeight - currentWeight)); 
     }

來源

2012-04-11 08:11:02

安卓減去從另一個

回答

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