简单的适配器问题，微调器中的文本+图像。 Java，Android

Question

问候一切。 我有一个小问题......那么，让我先说明我正在努力完成什么。 我有一个微调从一个存储阵列拉出字符串。 像这样，你不需要虽然阅读：

 
ArrayAdapter healthadapter = ArrayAdapter.createFromResource(
        this, R.array.health, android.R.layout.simple_spinner_item); 

      mHealthSpin = (Spinner) findViewById(R.id.health_spin); 

healthadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 

mHealthSpin.setAdapter(healthadapter); 

简单，几乎足够了。我想添加一个图像到微调。单选按钮是没有必要的。所以微调应弹出并有一个清单：

 
TEXT  *IMAGE* 
TEXT2 *IMAGE* 
TEXT3 *IMAGE* 

到目前为止，我有一个自定义SimpleAdapter。 这是问题！：文字出现，但不是图像。下面是代码：

 
public class stageadapter extends SimpleAdapter { 

private Context localContext; 
private ArrayList> localList; 

public stageadapter(Context context, 
    ArrayList> list, int resource, 
    String[] from, int[] to) { 
super(context, list, resource, from, to); 
localContext = context; 
localList = list; 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
if (null == convertView) { 
    LayoutInflater inflater = (LayoutInflater) localContext 
      .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    convertView = inflater.inflate(R.layout.stagerow, null); 
} 
TextView name = (TextView) convertView.findViewById(R.id.stage_name); 
name.setText((String)localList.get(position).get("Name")); 
ImageView icon = (ImageView) convertView.findViewById(R.id.stage_icon); 

icon.setImageResource(R.drawable.icon); 

return convertView; 
} 
@Override 
public View getDropDownView(int position, View convertView, 
      ViewGroup parent) { 
if (null == convertView) { 
    LayoutInflater inflater = (LayoutInflater) localContext 
      .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    convertView = inflater.inflate(R.layout.stagerow, null); 
} 
TextView name = (TextView) convertView.findViewById(R.id.stage_name); 
name.setText((String)localList.get(position).get("Name")); 
ImageView icon = (ImageView) convertView.findViewById(R.id.stage_icon); 
icon.setImageResource(R.drawable.icon); 

return convertView; 
} 
} 

我打算使用switch语句为每个名称设置不同的图像。然而我停在这里，直到我可以得到任何图像显示。

如何我打电话

 
    ArrayList> list = new ArrayList>(); 
      HashMap map = new HashMap(); 
      map.put("Name", "One"); 
      map.put("Icon", R.drawable.icon); 
      list.add(map); 

      map = new HashMap(); 
      map.put("Name", "Two"); 
      map.put("Icon", R.drawable.icon); 
      list.add(map); 

      mStageSpin = (Spinner) findViewById(R.id.stage_spin);       
      stageadapter adapter = new stageadapter(getApplicationContext(), list, R.layout.stagerow, new String[] { 
               "Name", "Icon"}, new int[] { 
                R.id.stage_name, R.id.stage_icon }); 
      mStageSpin.setAdapter(adapter);

对我来说，答案就在评论

Answer 1

删除以下行 - 它混淆你的适配器：

healthadapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

@Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     setContentView(R.layout.main); 

     ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>(); 
     HashMap<String, Object> map = new HashMap<String, Object>(); 
     map.put("Name", "One"); 
     map.put("Icon", R.drawable.icon); 
     list.add(map); 

     map = new HashMap<String, Object>(); 
     map.put("Name", "Two"); 
     map.put("Icon", R.drawable.icon); 
     list.add(map); 

     Spinner spin = (Spinner) findViewById(R.id.spin); 
     myAdapter adapter = new myAdapter(getApplicationContext(), list, 
       R.layout.list_layout, new String[] { "Name", "Icon" }, 
       new int[] { R.id.name, R.id.icon }); 

     spin.setAdapter(adapter); 

    } 

    private class myAdapter extends SimpleAdapter { 

     public myAdapter(Context context, List<? extends Map<String, ?>> data, 
       int resource, String[] from, int[] to) { 
      super(context, data, resource, from, to); 

     } 

     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 

      if (convertView == null) { 
       convertView = getLayoutInflater().inflate(R.layout.list_layout, 
         null); 
      } 

      HashMap<String, Object> data = (HashMap<String, Object>) getItem(position); 

      ((TextView) convertView.findViewById(R.id.name)) 
        .setText((String) data.get("Name")); 
      ((ImageView) convertView.findViewById(R.id.icon)) 
        .setImageResource(R.drawable.icon); 

      return convertView; 
     } 

    } 

Answer 2

问题是在getView中已经分配了对应于po的文本使用

((TextView) convertView.findViewById(R.id.name)).setText((String) data.get("Name"));

但对于图像u必须使用相同的资源，即

((ImageView) convertView.findViewById(R.id.icon)).setImageResource(R.drawable.icon);

你需要使用 “数据” HashMap的名单，并指定在此图像

Answer 3

是sition @Vicky你是对的。 对于像它应该基于上述答案是

((ImageView) convertView.findViewById(R.id.icon)) .setBackgroundResource((Integer) data.get("Icon")); 

Answer 4

，但有一些调整，以简化代码，并使其成为下拉正常工作。首先为你想要的行布局定义xml。在这种情况下，一个TextView和一排图像：

text_image_spinner_layout.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="horizontal" > 

<TextView android:id="@+id/text_image_spinner_text_tv" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center_vertical" 
    android:text="Medium Text" 
    android:textAppearance="?android:attr/textAppearanceMedium" /> 
<ImageView android:id="@+id/text_image_spinner_image_imageview" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center_vertical" 
    android:src="@drawable/icon" /> 
</LinearLayout> 

然后，根据需要创建，将建立各行类：

TextImageAdapter.java

public class ImageTextAdapter extends SimpleAdapter { 
public final static String keyForTextInAdapter = "text"; 
public final static String keyForImageInAdapter = "image"; 

private final static String fromKeys[]  = {keyForTextInAdapter, keyForImageInAdapter}; 
private final static int toIds[]   = {MyR.id.text_image_spinner_text_tv, MyR.id.text_image_spinner_image_imageview}; 
private final static int TO_ID_TEXT_INDEX = 0; 
private final static int TO_ID_IMAGE_INDEX = 1; 
private final static int layoutId   = MyR.layout.text_image_spinner_layout; 

private final static int TYPE_SHOWN_SELECTION = 0; 
private final static int TYPE_IN_DROPDOWN  = 1; 

LayoutInflater inflater; 
private List<? extends Map<String, ?>> dataIn; 

public ImageTextAdapter(Context context, List<? extends Map<String, ?>> data) { 
    super(context, data, layoutId, fromKeys, toIds); 
    inflater = LayoutInflater.from(context); 
    dataIn = data; 
} 

@Override 
public View getDropDownView(int position, View convertView, ViewGroup parent) { 
    return makeView(position, convertView, parent,TYPE_IN_DROPDOWN); 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    return makeView(position, convertView, parent, TYPE_SHOWN_SELECTION); 
} 

private View makeView(int position, View convertView, ViewGroup parent, int type) { 
    // Use the int type if you want to determine different actions if you have 
    // differing requirements for the dropdown and the shown selection. 
    if (convertView == null) convertView = inflater.inflate(layoutId, null); 

    HashMap<String, Object> data = (HashMap<String, Object>)dataIn.get(position); 

    ((TextView) convertView.findViewById(toIds[TO_ID_TEXT_INDEX])).setText((String) data.get(keyForTextInAdapter)); 
    ((ImageView) convertView.findViewById(toIds[TO_ID_IMAGE_INDEX])).setImageBitmap((Bitmap) data.get(keyForImageInAdapter)); 

    return convertView; 
    } 
} 

现在，您只需在实例化时创建微调适配器。您提供的“东西”...：

private void setUpAppOptions() { 
    ArrayList<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>(); 
    HashMap<String, Object> map; 

    for (int i=0; i<things.length; i++) { 
     map = new HashMap<String, Object>(); 
     map.put(ImageTextAdapter.keyForTextInAdapter, things[i].name); 
     map.put(ImageTextAdapter.keyForImageInAdapter, things[i].image); 
     list.add(map); 
    } 

    ImageTextAdapter adapter = new ImageTextAdapter(myContext, list); 
    appOptionSpinner.setAdapter(adapter); 
}