Android 5.0 中的 Spinner 适配器问题

Question

我的应用不兼容 Android 5.

当我运行它在任何其他版本中时，它都可以正常工作。

这是 logcat 当运行在 Android 5:

中出现的内容

05-16 23:44:10.287    1969-1969/com.barakah.camel E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.barakah.camel, PID: 1969
java.lang.IllegalArgumentException: Spinner adapter view type count must be 1

根据logcat:

问题出在哪里

 public void regionSpinnerSetup() {
    ParseQueryAdapter.QueryFactory<ParseObject> factory = new ParseQueryAdapter.QueryFactory<ParseObject>() {
        public ParseQuery create() {
            ParseQuery query = new ParseQuery("Region");
            return query;
        }
    };

    regionAdapter = new ParseQueryAdapter<ParseObject>(getActivity(),
            factory);
    regionAdapter.setTextKey("name");
    regionSpinner.setAdapter(regionAdapter);
    regionSpinner.setSelection(1);
    regionSpinner.setOnItemSelectedListener(new RegionSpinnerListener());
}

public void CategorySpinnerSetup() {
    ParseQueryAdapter.QueryFactory<ParseObject> factory = new ParseQueryAdapter.QueryFactory<ParseObject>() {
        public ParseQuery create() {
            ParseQuery query = new ParseQuery("Category");
            return query;
        }
    };

    categoryAdapter = new ParseQueryAdapter<ParseObject>(getActivity(),
            factory);
    categoryAdapter.setTextKey("name");
    categorySpinner.setAdapter(categoryAdapter);
    categorySpinner.setSelection(1);
    categorySpinner
            .setOnItemSelectedListener(new CategorySpinnerListener());
}

class RegionSpinnerListener implements Spinner.OnItemSelectedListener {
    @Override
    public void onItemSelected(AdapterView parent, View v, int position,
                               long id) {
        // TODO Auto-generated method stub

        ParseObject theSelectedObject = regionAdapter.getItem(position);
        Log.e("ABC", "Name is : " + theSelectedObject.getString("name") + " objectId is : " + theSelectedObject.getObjectId());
        regionobject = theSelectedObject;
    }

regionSpinner 和 categorySpinner 都是 Spinner 类型的对象 ...

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    regionSpinnerSetup();
    CategorySpinnerSetup();

}

知道如何解决吗？

Answer 1

你无法解决这个问题，因为在 lollypop 中这个问题是相关的。因此，此应用可以运行在 API 19 岁或以下。

如果您正在开发这个应用程序，那么您只能在项目中做一个小的改动。将您的 adapter.getViewTypeCount() 更改为 1。这是唯一的解决方案。

在这里你可以read for more reference

Answer 2

我没有使用 ParseQueryAdapter 的经验，但是通过阅读它，您似乎可以做这样的事情。

首先，创建您自己的扩展 ParseQueryAdapter 的 class，并覆盖 getViewTypeCount():

public class MyParseAdapter extends ParseQueryAdapter<ParseObject> {

  public MyParseAdapter(Context context, QueryFactory<ParseObject> clazz){        
        super(context, clazz); 
  }

  @Override
  public int getViewTypeCount() {
     return 1;
  }
}

然后，将代码中每个有 ParseQueryAdapter 的地方替换为 MyParseAdapter:

public void regionSpinnerSetup() {
    MyParseAdapter.QueryFactory<ParseObject> factory = new MyParseAdapter.QueryFactory<ParseObject>() {
        public ParseQuery create() {
            ParseQuery query = new ParseQuery("Region");
            return query;
        }
    };

    regionAdapter = new MyParseAdapter<ParseObject>(getActivity(),
            factory);
    regionAdapter.setTextKey("name");
    regionSpinner.setAdapter(regionAdapter);
    regionSpinner.setSelection(1);
    regionSpinner.setOnItemSelectedListener(new RegionSpinnerListener());
}

public void CategorySpinnerSetup() {
    MyParseAdapter.QueryFactory<ParseObject> factory = new MyParseAdapter.QueryFactory<ParseObject>() {
        public ParseQuery create() {
            ParseQuery query = new ParseQuery("Category");
            return query;
        }
    };

    categoryAdapter = new MyParseAdapter<ParseObject>(getActivity(),
            factory);
    categoryAdapter.setTextKey("name");
    categorySpinner.setAdapter(categoryAdapter);
    categorySpinner.setSelection(1);
    categorySpinner
            .setOnItemSelectedListener(new CategorySpinnerListener());
}

class RegionSpinnerListener implements Spinner.OnItemSelectedListener {
    @Override
    public void onItemSelected(AdapterView parent, View v, int position,
                               long id) {
        // TODO Auto-generated method stub

        ParseObject theSelectedObject = regionAdapter.getItem(position);
        Log.e("ABC", "Name is : " + theSelectedObject.getString("name") + " objectId is : " + theSelectedObject.getObjectId());
        regionobject = theSelectedObject;
    }

Android 5.0 中的 Spinner 适配器问题

Spinner adapter issue in Android 5.0

android

android-spinner

android-5.0-lollipop