android - 如何用图像而不是文本创建微调器？

Question

鉴于下面的代码，是否可以在行星数组中使用图像而不是文本？

    Spinner s = (Spinner) findViewById(R.id.spinner);    
    ArrayAdapter adapter = ArrayAdapter.createFromResource(            
            this, R.array.planets, android.R.layout.simple_spinner_item);    
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);    
    s.setAdapter(adapter);

和

    <string name="planet_prompt">Choose a planet</string>
    <string-array name="planets">        
        <item>Mercury</item>
        <item>Venus</item>
        <item>Earth</item>        
        <item>Mars</item>        
        <item>Jupiter</item>        
        <item>Saturn</item>        
        <item>Uranus</item>        
        <item>Neptune</item>    
    </string-array>    

Answer 1

我只需要一个 super 简单的解决方案来处理微调器中的一组固定图像，所以我这样做了:

public class SimpleImageArrayAdapter extends ArrayAdapter<Integer> {
private Integer[] images;

public SimpleImageArrayAdapter(Context context, Integer[] images) {
    super(context, android.R.layout.simple_spinner_item, images);
    this.images = images;
}

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

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

private View getImageForPosition(int position) {
        ImageView imageView = new ImageView(getContext());
        imageView.setBackgroundResource(images[position]);
        imageView.setLayoutParams(new AbsListView.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        return imageView;
}

}

然后在代码中你可以像这样使用它:

    SimpleImageArrayAdapter adapter = new SimpleImageArrayAdapter(context, 
        new Integer[]{R.drawable.smiley1, R.drawable.smiley2, R.drawable.smiley3, R.drawable.smiley4, R.drawable.smiley5});
    spinner.setAdapter(adapter);