javascript - 将选定的值传递给另一个 Android 类

Question

我试图将从微调器中选择的值传递给另一个类，但它传递了 null。

protected int secondsToUse;

final String titles[] = {
  "1 Second","2 Seconds", "3 Seconds","4 Seconds",
  "5 Seconds","6 Seconds","7 Seconds","8 Seconds","9 Seconds","10 Seconds"
};

mSeconds = (Spinner) view.findViewById(R.id.secondsSpinner);

 ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_item, titles);
        arrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    mSeconds.setAdapter(arrayAdapter);
mSeconds.setOnItemSelectedListener(
    new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
            // secondsToUse is declared a as int variable above
            secondsToUse = position + 1;
        }



// passing the value to another class.// PASSES AS NULL
Intent recipientsIntent = new Intent(getActivity(), RecipientsActivity.class);
                    recipientsIntent.putExtra("key1", secondsToUse);
                    startActivity(recipientsIntent);

// retrieving the value //retrieves as null
String Seconds = getIntent().getStringExtra("key1");
byte[] secs = Seconds.getBytes();

我正在尝试获取用户在旋转器上选择的位置，以便我可以将其传递到计时器中，以便图像自毁。此刻我得到空

Answer 1

编辑:我忘记考虑到 getIntExtra() 在我的第一个答案中采用两个参数。它需要一个识别“键”和一个默认值。

要检索 RecipientsActivity 中所选行的位置，请保持代码不变。然后，在RecipientsActivity的onCreate()中:

int seconds = getIntent().getIntExtra("key1", -1);

<小时/>