如何从一个ArrayList中的GridView onItemClick中获取字符串中的一个片段？ [英] How to get String from an ArrayList from a GridView onItemClick in a fragment?

问题描述

我试图为gridview设置一个onclick监听器。 gridview显示文本和图像。当一个项目被点击时，我希望它从该项目获取文本，并根据一些if语句进行检查。这是我的班。由于这个事实，它在一个片段，我是新来的碎片，我有困难搞清楚。谢谢

 导入这里... 
 
公共类扩展SherlockFragment {
 
 public view onCreateView（LayoutInflater inflater，ViewGroup container，Bundle savedInstanceState）{
 View view = inflater.inflate（R.layout.activity_main，container，false）; 
 
 
 GridView gridView =（GridView）view.findViewById（R.id.gridview）; 
 gridView.setAdapter（new MyAdapter（getActivity（）））; 
 gridView.setOnItemClickListener（new OnItemClickListener（）{
 @Override 
 public void onItemClick（AdapterView<？> parent，View v，
 int position，long id）{
 $ b $ if（SOMETHING.equals（Furniture））{
 Toast.makeText（getActivity（），Furny，Toast.LENGTH_SHORT）.show（）; 
 // THIS我在哪里，我不知道如何用
 
 
 $ b}来代替某件事）; 
 
 
返回视图; 
} 
 
 
 
 public class MyAdapter extends BaseAdapter 
 {
 private List< Item> items = new ArrayList< Item>（）; 
私人LayoutInflater inflater; 
 
 public MyAdapter（上下文上下文）
 {
 inflater = LayoutInflater.from（context）; 
 
 items.add（new Item（Weapons，R.drawable.BOMB））; 
 items.add（new Item（Tools，R.drawable.TOOL））; 
 items.add（new Item（Furniture，R.drawable.CHAIR））; 
 
 
 
 $ b @Override 
 public int getCount（）{
 return items.size（）; 
} 
 
 @Override 
 public Object getItem（int i）
 {
 return items.get（i）; 
} 
 
 @Override 
 public long getItemId（int i）
 {
 return items.get（i）.drawableId; 
} 
 
 
 
 @覆盖
 public View getView（int i，View view，ViewGroup viewGroup）
 {
 View v =查看; 
 ImageView图片; 
 TextView名称; 
 
 if（v == null）
 {
 v = inflater.inflate（R.layout.gridview_item，viewGroup，false）; 
 v.setTag（R.id.picture，v.findViewById（R.id.picture））; 
 v.setTag（R.id.text，v.findViewById（R.id.text））; 
} 
 
 picture =（ImageView）v.getTag（R.id.picture）; 
 name =（TextView）v.getTag（R.id.text）; 
 
 Item item =（Item）getItem（i）; 
选项options = new BitmapFactory.Options（）; 
 options.inDither = false; 
 options.inScaled = false; 
位图源= BitmapFactory.decodeResource（getResources（），item.drawableId，options）; 
 
 final int maxSize = 120; 
 int outWidth; 
 int outHeight; 
 int inWidth = source.getWidth（）; 
 int inHeight = source.getHeight（）; 
 if（inWidth> inHeight）{
 outWidth = maxSize; 
 outHeight =（inHeight * maxSize）/ inWidth; 
} else {
 outHeight = maxSize; 
 outWidth =（inWidth * maxSize）/ inHeight; 
} 
 
位图resizedBitmap = Bitmap.createScaledBitmap（source，outWidth，outHeight，false）; 
 picture.setImageBitmap（resizedBitmap）; 
 name.setText（item.name）; 
 
 return v; 
 
 
} 
 
私人课程项目
 {
 final字符串名称; 
 final int drawableId; 
 
 Item（String name，int drawableId）
 {
 this.name = name; 
 this.drawableId = drawableId; 
} 
} 
} 
 
 
} 
  

解决方案

使用位置 param并获取该位置的商品

  Item item =（Item）parent.getItemAtPosition（position）; 
 String name = item.name; 
  

，您可以将下面的内容移至单独的 .java file

  public class Item 
 {
 String name; 
 int drawableId; 
 
 Item（String name，int drawableId）
 {
 this.name = name; 
 this.drawableId = drawableId; 
} 
} 
  

I'm trying to set up an onclick listener for a gridview. The gridview shows text and an image. When an item is clicked, I want it to get the text from that item and check it against some if statements. Here is my class. Due to that fact that it in a fragment, and I'm new to fragments, I am having difficulty figuring it out. Thanks

    IMPORTS HERE...

    public class Items extends SherlockFragment {

        public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
            View view=inflater.inflate(R.layout.activity_main, container, false);


            GridView gridView = (GridView)view.findViewById(R.id.gridview);
            gridView.setAdapter(new MyAdapter(getActivity()));
            gridView.setOnItemClickListener(new OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View v,
                        int position, long id) {

                    if(SOMETHING.equals("Furniture")){
                        Toast.makeText(getActivity(), "Furny", Toast.LENGTH_SHORT).show();
                    //THIS IS WHERE I'M STUCK. I DON'T KNOW WHAT TO REPLACE "SOMETHING" WITH

}
             }
            });


            return view;
        }



        public class MyAdapter extends BaseAdapter
        {
            private List<Item> items = new ArrayList<Item>();
            private LayoutInflater inflater;

            public MyAdapter(Context context)
            {
                inflater = LayoutInflater.from(context);

                items.add(new Item("Weapons", R.drawable.BOMB));
                items.add(new Item("Tools", R.drawable.TOOL));
                items.add(new Item("Furniture", R.drawable.CHAIR));


            }

            @Override
            public int getCount() {
                return items.size();
            }

            @Override
            public Object getItem(int i)
            {
                return items.get(i);
            }

            @Override
            public long getItemId(int i)
            {
                return items.get(i).drawableId;
            }



            @Override
            public View getView(int i, View view, ViewGroup viewGroup)
            {
                View v = view;
                ImageView picture;
                TextView name;

                if(v == null)
                {
                   v = inflater.inflate(R.layout.gridview_item, viewGroup, false);
                   v.setTag(R.id.picture, v.findViewById(R.id.picture));
                   v.setTag(R.id.text, v.findViewById(R.id.text));
                }

                picture = (ImageView)v.getTag(R.id.picture);
                name = (TextView)v.getTag(R.id.text);

                Item item = (Item)getItem(i);
                Options options = new BitmapFactory.Options();
                options.inDither = false;
                options.inScaled = false;
                Bitmap source = BitmapFactory.decodeResource(getResources(), item.drawableId, options);

                final int maxSize = 120;
                int outWidth;
                int outHeight;
                int inWidth = source.getWidth();
                int inHeight = source.getHeight();
                if(inWidth > inHeight){
                    outWidth = maxSize;
                    outHeight = (inHeight * maxSize) / inWidth; 
                } else {
                    outHeight = maxSize;
                    outWidth = (inWidth * maxSize) / inHeight; 
                }

                Bitmap resizedBitmap = Bitmap.createScaledBitmap(source, outWidth, outHeight, false);
                picture.setImageBitmap(resizedBitmap);
                name.setText(item.name);

                return v;


            }

            private class Item
            {
                final String name;
                final int drawableId;

                Item(String name, int drawableId)
                {
                    this.name = name;
                    this.drawableId = drawableId;
                }
            }
        }


    }

解决方案

Use the position param and get the item at that position

 Item item= (Item) parent.getItemAtPosition(position);
 String name = item.name;

and you can move the below to separate .java file

  public class Item 
  {
             String name;
             int drawableId;

            Item(String name, int drawableId)
            {
                this.name = name;
                this.drawableId = drawableId;
            }
   }

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