android - 从选定的微调项字符串准备资源 ID

Question

我有一个带有各种项目的微调器，我用它来从所选项目中获取文本。

我想用这个文本为openRawResource准备一个资源id，我的代码看起来像

    Spinner spinner = (Spinner) v.findViewById(R.id.accident);
    String text = spinner.getSelectedItem().toString();
    String newt = "R.raw." + text;
    int textxx = Integer.parseInt(newt); 

    InputStream is = getResources().openRawResource(textxx);

但它不起作用，任何想法

Answer 1

问题就在这里

int textxx = Integer.parseInt(newt);

正确的做法是:

int resID = getResources().getIdentifier(text, "raw", getApplicationContext().getPackageName());

现在您可以按如下方式使用 InputStream:

InputStream is = getResources().openRawResource(resID);

编辑

does not allow getPackageName() says its indefined

如果您正在进行Activity，您可以这样做:

this.getPackageName(); //this -> context

如果你在 Fragment 上，你可以这样做:

getActivity().getPackageName(); 

but only opens the first item in the spinner does not open other files when i select other items

您需要实现 onItemSelected()请参阅下面的代码。

final Spinner sp = (Spinner)findViewById(R.id.spinner);
    sp.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
            // your code here
            String text = sp.getSelectedItem().toString();
            int resID = getResources().getIdentifier(text, "raw", getPackageName());
            InputStream is = getResources().openRawResource(resID);
            Toast.makeText(MainActivity.this, "Clicked", Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onNothingSelected(AdapterView<?> parentView) {
            // your code here
        }

    });