java - 如何为每个网格 View 项目赋予不同的背景颜色？

我有一个GridView作为MainActivity，由11个带有Clickable Listener的项组成。每个单元格由一个ImageView和一个TextView组成。我想给这11个项目分别提供不同的背景色。

这是我的物品数组

public static String [] prgmNameList={"TownHall 1","TownHall 2",
            "TownHall 3","TownHall 4","TownHall 5 ","TownHall 6",
            "TownHall 7","TownHall 8","TownHall 9","TownHall 10","TownHall 11"};
    public static int [] prgmImages={R.drawable.town_hall1,
            R.drawable.town_hall2,R.drawable.town_hall3,
            R.drawable.town_hall4,R.drawable.town_hall5,
            R.drawable.town_hall6,R.drawable.town_hall7,
            R.drawable.town_hall8,R.drawable.town_hall9,
    R.drawable.town_hall10, R.drawable.town_hall11};

这是我到GridView Adapter的代码

public class CustomAdapterMainActivity extends BaseAdapter {

    String [] result;
    Context context;
    int [] imageId;
    private static LayoutInflater inflater=null;
    public CustomAdapterMainActivity(MainActivity mainActivity, String[] prgmNameList, int[] prgmImages) {
        // TODO Auto-generated constructor stub
        result=prgmNameList;
        context=mainActivity;
        imageId=prgmImages;
        inflater = ( LayoutInflater )context.
                getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return result.length;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    public class Holder
    {
        TextView tv;
        ImageView img;
    }
    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        Holder holder=new Holder();
        View rowView;
        ImageView img;

        rowView = inflater.inflate(R.layout.each_item_gridview, null);
        holder.tv=(TextView) rowView.findViewById(R.id.textView1);
        holder.img=(ImageView) rowView.findViewById(R.id.imageView1);

        holder.tv.setText(result[position]);
        holder.img.setImageResource(imageId[position]);



        rowView.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(context, "You Clicked " + result[position], Toast.LENGTH_LONG).show();
                Class<? extends Activity> activityToStart = null;
                switch (position) {

                    case 0:
                        activityToStart = TownHallElevenActivity.class;
                        break;

                    case 1:
                        activityToStart = TownHallElevenActivity.class;
                        break;

                    case 2:
                        activityToStart = TownHallElevenActivity.class;
                        break;

                    case 3:
                        activityToStart = TownHallElevenActivity.class;
                        break;

                    case 4:
                        activityToStart = TownHallElevenActivity.class;
                        break;

                    case 5:
                        activityToStart = TownHallElevenActivity.class;
                        break;

                    case 6:
                        activityToStart = TownHallElevenActivity.class;
                        break;

                    case 7:
                        activityToStart = TownHallElevenActivity.class;
                        break;

                    case 8:
                        activityToStart = TownHallNineActivity.class;
                        break;

                    case 9:
                        activityToStart = TownHallTenActivity.class;
                        break;

                    case 10:
                        activityToStart = TownHallElevenActivity.class;

                        break;
                    default:
                        break;

                }
                Intent i = new Intent(context.getApplicationContext(), activityToStart);
                i.putExtra("classFrom", activityToStart.toString());
               context.startActivity(i);
            }
        });

        return rowView;
    }

}

最佳答案

使用此代码，就可以了！

1）您的班级假设类别班级：

 public class Category extends Fragment implements View.OnClickListener {

CategoryAdapter catAdpater;
FragmentController controller;
FragmentCommunicator communicator;

ArrayList<Integer> catImages = new ArrayList<>();
GridView catGrid;
String[] gridItem = {
        "Technology",
        "Food & Drink",
        "Catering",
        "Education",
        "Travel",
        "Accessories",
        "Cleaners",
        "Cloth",
        "Random"
};

String[] gridColor = {
        "#3c6169",
        "#30515d",
        "#284b5e",
        "#224156",
        "#86a6a1",
        "#729493",
        "#3c6169",
        "#30515d",
        "#224156",
        "#3c6169"
};


LinearLayout categoryLayout;
ImageView back;


public Category() {
    // Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container,
                         final Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_category, container, false);
    //controller = new FragmentController();
    //communicator = (FragmentCommunicator)getActivity();



    //MrVector.inflate(getResources(), R.drawable.phone);
    catGrid = (GridView)view.findViewById(R.id.catGrid);
    categoryLayout = (LinearLayout)view.findViewById(R.id.header);
    back =(ImageView)view.findViewById(R.id.back);
    categoryLayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //empty
        }
    });
    back.setOnClickListener(this);

    ArrayList<String> categories = new ArrayList<>();
    categories.add("Technology");
    categories.add("Food & Drink");
    categories.add("Catering");
    categories.add("Education");
    categories.add("Travel");
    categories.add("Accessories");
    categories.add("Cleaners");
    categories.add("Cloth");
    categories.add("Random");


    catImages.add(R.drawable.ic_phone_iphone_white_48dp);
    catImages.add(R.drawable.ic_local_drink_white_48dp);
    catImages.add(R.drawable.ic_restaurant_white_48dp);
    catImages.add(R.drawable.ic_school_white_48dp);
    catImages.add(R.drawable.ic_airplanemode_active_white_48dp);
    catImages.add(R.drawable.ic_watch_white_48dp);
    catImages.add(R.drawable.ic_phone_iphone_white_48dp);
    catImages.add(R.drawable.ic_action_accessibility);
    catImages.add(R.drawable.ic_store_mall_directory_white_48dp);

    catAdpater = new CategoryAdapter(this.getContext(),categories,catImages,gridColor);
    catGrid.setAdapter(catAdpater); }

2）您的自定义适配器：

public class CategoryAdapter extends BaseAdapter {

ArrayList<String> cat_name;
ArrayList<Integer> images;
private Context mContext;
private LayoutInflater mInflater;
private final String[] gridcolor;

public CategoryAdapter(Context mContext, ArrayList<String> cat_name, ArrayList<Integer> images,String[] gridcolor)
{
    this.mContext = mContext;
    this.cat_name = cat_name;
    this.gridcolor = gridcolor;
    this.images = images;
    mInflater = LayoutInflater.from(mContext);
}

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

@Override
public Object getItem(int i) {
    return null;
}

@Override
public long getItemId(int i) {
    return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View row = convertView;
    CategoryHolder holder = null;

    if(row == null)
    {
        row = mInflater.inflate(R.layout.category_item, parent, false);
        holder = new CategoryHolder(row);
        row.setTag(holder);
    }
    else
    {
        holder = (CategoryHolder)row.getTag();
    }

    try {
        Picasso.with(mContext)
                .load(images.get(position))
                .placeholder(R.drawable.loading)
                .error(R.drawable.nopicture)
                .into(holder.image);
    } catch (Exception e) {
        Log.d("MYDEBUG3", e.getMessage());
    }
    holder.name.setText(cat_name.get(position));
    holder.layout.setBackgroundColor(Color.parseColor(gridcolor[position]));
    return row;
}