Question

我想在spinner的每个项目中显示不同的图片视图，并指明其位置。我的问题是，spinner只能显示一个ImageView。

states = getResources().getStringArray(R.array.Facilities);
imgs = getResources().obtainTypedArray(R.array.popup);

image = (ImageView) findViewById(R.id.country_image);
spinner = (Spinner) findViewById(R.id.country_spinner);

ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
        android.R.layout.simple_spinner_item, states);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
    @Override
    public void onItemSelected(AdapterView<?> parent, View view,
                               int position, long id) {
        image.setImageResource(imgs.getResourceId(
                spinner.getSelectedItemPosition(), -1));
    }

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

    }
});

Answer 1

我建议您使用自定义适配器并使用它来扩充自定义布局

row.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="wrap_content"
android:orientation="horizontal">

<ImageView
    android:id="@+id/image"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/ic_launcher"/>

<TextView
    android:id="@+id/position"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"/>
</LinearLayout>

以下是CustomAdaoter，它在微调器

中膨胀上面的布局

public class CustomAdapter extends ArrayAdapter {
    Context context;
    int images[];

    public CustomAdapter(Context ctx, int txtViewResourceId, String[] objects, int[] images)
    {
        super(ctx, txtViewResourceId, objects);
        this.context=ctx;
        this.images = images;
    }

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

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

    public View customView(int position, View convertView, ViewGroup parent) {

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.row, parent, false);
        TextView imgPosition = (TextView) convertView.findViewById(R.id.position);
        imgPosition.setText(position);
        ImageView imageView = (ImageView) convertView.findViewById(R.id.image);
        imageView.setImageResource(images[position]);
        return convertView;

    }
      //Override the getCount() because we are passing object as null in constructor
      //getCount() determines how many times the getView should b called
    @Override
        public int getCount() {
            return images.length;
        }

}

在要显示微调器的活动中调用它

public class MainActivity extends ActionBarActivity {

    Spinner spinner;
    int imgData[] = {R.drawable.ic_action_alarms,R.drawable.ic_action_discard,R.drawable.ic_launcher};


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        spinner = (Spinner) findViewById(R.id.spinner);
        CustomAdapter adapter = new CustomAdapter(getBaseContext(),R.layout.row,null,imgData);
        spinner.setAdapter(adapter);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

修改按如下方式实现CustomView方法：

public View customView(int position, View convertView, ViewGroup parent) { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(R.layout.row, parent, false); ImageView imageView = (ImageView) convertView.findViewById(R.id.image); imageView.setImageResource(images[position]); return convertView; }

如何在微调器的每个项目中分配不同的图像视图？

1 个答案: