Android旋转器不显示数组，但显示位置

Question

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_info);

    engineSpinner = (Spinner)findViewById(R.id.rockets);
    engineNameList = StagesData.getEngineNameList();
    engStrList = engineNameList.toArray(new String[engineNameList.size()]);

    adapter = new ArrayAdapter<String>(InfoActivity.this, android.R.layout.simple_spinner_item, engStrList);
    // adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, R.array.array_engines);
    // adapter = new ArrayAdapter<String>(InfoActivity.this, android.R.layout.simple_dropdown_item_1line, R.id.rockets, engStrList);
    // adapter = ArrayAdapter.createFromResource(InfoActivity.this, android.R.layout.simple_spinner_item, R.array.engines);

    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    engineSpinner.setAdapter(adapter);
    engineSpinner.setSelection(0);

<TableRow>
        <TextView
            android:text="@string/rocket"
            android:padding="3dp"/>
        <Spinner
            android:id="@+id/rockets"
            android:gravity="right"
            android:entries="@array/engines"
            android:clickable="true"
            android:textColor="@color/colorblack"
            android:spinnerMode="dropdown"
            android:backgroundTint="@color/colorPrimary" />
    </TableRow>

最后，这是我想从中提取的字符串数组文件（我是把我的字符串数组放在它自己的文件中的values文件夹中，还是放在字符串文件中，我都看过了，不知道是哪个，谢谢）

<?xml version="1.0" encoding="utf-8">
<resources>
      <string-array name="engines">
            <item>Ant</item>
            <item>Dart</item>
            <item>Dawn</item>
            <item>Flea</item>
            <item>Hammer</item>
            <item>Kickback</item>
            <item>MainSail</item>
            <item>Mammoth</item>
            <item>Nerv</item>
            <item>Poodle</item>
            <item>Puff</item>
            <item>R.A.P.I.E.R</item>
            <item>Reliant</item>
            <item>Rhino</item>
            <item>Skipper</item>
            <item>Spark</item>
            <item>Spider</item>
            <item>Swivel</item>
            <item>Terrier</item>
            <item>Thud</item>
            <item>Thumper</item>
            <item>Twin Boar</item>
            <item>Twitch</item>
            <item>Vector</item>
      </string-array>
</resources>

因此，我要重述一下我的问题，我需要使用arraylist 还是string[]，我如何设置我的ArrayAdapter，以及我需要把我的string-array放在哪里？
先谢谢您！

Answer 1

我重新创建了你的样本，并为我的改变做了很好的工作

engStrList = engineNameList.toArray(new String[engineNameList.size()]); 
adapter = new ArrayAdapter<String>(InfoActivity.this, android.R.layout.simple_spinner_item, engStrList);

至

engStrList = new String[]{"a","b","c"};
adapter = new ArrayAdapter<String>(InfoActivity.this, android.R.layout.simple_spinner_item, engStrList);

所以我的猜测是，您应该检查stagesdata.getEngineNameList()返回的是什么。

ArrayAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, getResources().getStringArray(R.array.engines));