以编程方式设置微调器的选定项

本文翻译自：Set selected item of spinner programmatically

I am working on an android project and I am using a spinner which uses an array adapter which is populated from the database. 我正在研究一个android项目，我正在使用一个使用数组适配器的微调器，该数组适配器是从数据库中填充的。

I can't find out how I can set the selected item programmatically from the list. 我无法找到如何从列表中以编程方式设置所选项目。 For example if, in the spinner I have the following items: 例如，如果在微调器中我有以下项目：

• Category 1 第1类
• Category 2 第2类
• Category 3 第3类

How would I programmatically make Category 2 the selected item when the screen is created. 创建屏幕时，如何以编程方式将类别2设为选定项目。 I was thinking it might be similar to c# IE Spinner.SelectedText = "Category 2" but there doesn't seem to be any method similar to this for Android. 我认为它可能类似于c＃IE Spinner.SelectedText =“Category 2”但似乎没有任何类似于Android的方法。

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#1楼

参考：https://stackoom.com/question/kSTw/以编程方式设置微调器的选定项

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#2楼

使用以下命令： spinnerObject.setSelection(INDEX_OF_CATEGORY2) 。

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#3楼

public static void selectSpinnerItemByValue(Spinner spnr, long value) {
    SimpleCursorAdapter adapter = (SimpleCursorAdapter) spnr.getAdapter();
    for (int position = 0; position < adapter.getCount(); position++) {
        if(adapter.getItemId(position) == value) {
            spnr.setSelection(position);
            return;
        }
    }
}

You can use the above like: 您可以使用以上内容：

selectSpinnerItemByValue(spinnerObject, desiredValue);

& of course you can also select by index directly like 当然你也可以直接选择索引

spinnerObject.setSelection(index);

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#4楼

I have a SimpleCursorAdapter so I have to duplicate the data for use the respose in this post. 我有一个SimpleCursorAdapter所以我必须复制数据以便在这篇文章中使用respose。 So, I recommend you try this way: 所以，我建议你尝试这种方式：

for (int i = 0; i < spinnerRegion.getAdapter().getCount(); i++) {
    if (spinnerRegion.getItemIdAtPosition(i) == Integer
        .valueOf(signal.getInt(signal
            .getColumnIndexOrThrow("id_region")))) {
        spinnerRegion.setSelection(i);
        break;
    }
}

I think that is a real way 我认为这是一个真实的方式

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#5楼

No one of these answers gave me the solution, only worked with this: 这些答案中没有一个给我解决方案，只有这个：

mySpinner.post(new Runnable() {
    @Override
    public void run() {
        mySpinner.setSelection(position);
    }
});

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#6楼

如果你有一个联系人列表，你可以这样做：

((Spinner) view.findViewById(R.id.mobile)).setSelection(spinnerContactPersonDesignationAdapter.getPosition(schoolContact.get(i).getCONT_DESIGNATION()));