你如何获得一个微调的选定值？ [英] How do you get the selected value of a Spinner?

问题描述

我想获得所选项目串出一个微调的。到目前为止，我已经得到了这一点：

I am trying to get the selected items string out of a Spinner. So far I have gotten this:

bundle.putString(ListDbAdapter.DB_PRI, v.getText().toString());

这不工作，并给出了类转换异常（我想我可以投一个查看来一个小部件，继承它，显然不是！）所以你怎么弄一个选择的值微调？

This does not work and gives a class casting exception (I thought I could cast a View to a widget that inherits it. Obviously not!) So how do you get the selected value of a Spinner?

推荐答案

要得到一个微调的选定值，你可以按照这个的例如的。

To get the selected value of a spinner you can follow this example.

创建实现AdapterView.OnItemSelectedListener嵌套类。这将提供一个项目时已选定的微调，将通知您的应用程序回调方法。

Create a nested class that implements AdapterView.OnItemSelectedListener. This will provide a callback method that will notify your application when an item has been selected from the Spinner.

在这一类的onItemSelected的方法，你可以选择的项目：

Within "onItemSelected" method of that class, you can get the selected item:

public class YourItemSelectedListener implements OnItemSelectedListener {

    public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
        String selected = parent.getItemAtPosition(pos).toString();
    }

    public void onNothingSelected(AdapterView parent) {
        // Do nothing.
    }
}

最后，你ItemSelectedListener必须在微调注册的：

Finally, your ItemSelectedListener needs to be registered in the Spinner:

spinner.setOnItemSelectedListener(new MyOnItemSelectedListener());

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