Android Spinner对话框不是填充?

时间:2011-11-22 17:32:03

标签: java android spinner

我有一个由两个片段组成的活动。左边是侧边栏,右边是MapView(见下面的截图)。

在左侧,我有一个旋转器,将在地图上填充对象。现在,我已经用一些值硬编码,直到我弄清楚这个问题。选择微调器后,会出现一个对话框,但它是空的。知道发生了什么事吗?

这是左边片段的代码(它不是很复杂):

package android.splitdisplay;


import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.Toast;

public class SideFragment extends Fragment {
    String[] tracks = { "ObjectOne", "ObjectTwo",
            "ObjectThree"

    };


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.getActivity().setContentView(R.layout.sidefragment);

        final Spinner s = (Spinner) this.getActivity().findViewById(
                R.id.track_spinner);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this
                .getActivity().getBaseContext(),
                android.R.layout.simple_spinner_item, tracks);
        s.setAdapter(adapter);

        s.setOnItemSelectedListener(new OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {
                int item = s.getSelectedItemPosition();
                Toast.makeText(SideFragment.this.getActivity().getBaseContext(),
                        "clicked "+item, Toast.LENGTH_SHORT).show();
            }

                @Override
            public void onNothingSelected(AdapterView<?> arg0) {
            }
        });

    }

    public void onListItemClick(ListView parent, View v, int position, long id) {

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        return inflater.inflate(R.layout.sidefragment, container, true);
    }
}

以下是SideFragment的XML:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Tracks"
        android:textColor="#adff2f"
        android:textSize="30sp" />

    <Spinner
        android:id="@+id/track_spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:drawSelectorOnTop="true"
        android:prompt="@string/track_prompt"
        android:spinnerMode="dialog" >
    </Spinner>

</LinearLayout>

这是我点击微调器时所看到的:

What I am seeing

以下是zip中的所有源代码:

http://db.tt/KMGXhZWc

2 个答案:

答案 0 :(得分:2)

问题不在于Spinner,问题在于你是在给两个Spinners充气。一个在onCreateView方法中,另一个在此行中:

this.getActivity().setContentView(R.layout.sidefragment);

只有一个带有提供者的微调器...所以我建议你在onCreationView中设置所有的GUI变量,如下所示:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.sidefragment, container, true);
    final Spinner s = (Spinner) v.findViewById(
            R.id.track_spinner);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this
            .getActivity().getBaseContext(),
            android.R.layout.simple_spinner_item, tracks);
    s.setAdapter(adapter);

    s.setOnItemSelectedListener(new OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {
            int item = s.getSelectedItemPosition();
            Toast.makeText(SideFragment.this.getActivity().getBaseContext(),
                    "clicked "+item, Toast.LENGTH_SHORT).show();
        }

            @Override
        public void onNothingSelected(AdapterView<?> arg0) {
        }
    });
    return v;
}

并删除onCreate上的覆盖方法。

答案 1 :(得分:0)

这就是我一直做我的旋转器的方式

ArrayAdapter<CharSequence> cAdapter;
    cAdapter = ArrayAdapter.createFromResource(this, R.array.colors,android.R.layout.simple_spinner_item);
    int cSpinnerDD = android.R.layout.simple_spinner_dropdown_item;
    cAdapter.setDropDownViewResource(cSpinnerDD);
    color.setAdapter(cAdapter);

尝试一下