在数组列表中更改对象的文本颜色

Question

我一直在尝试在数组列表中添加一个颜色参数，但我似乎无法做到，我花了无数个小时尝试做到这一点，甚至在这里寻找答案。

这是我的代码：

MainActivity.java：

package com.example.ofir.myapplication;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final ArrayList<Brands> brands = new ArrayList<>();
        brands.add(new Brands("KTM"));
        brands.add(new Brands("BMW"));
        brands.add(new Brands("Suzuki"));
        brands.add(new Brands("Yamaha"));
        brands.add(new Brands("HONDA"));

        BrandAdapter itemsAdapter = new BrandAdapter(this, brands);

        ListView listView = (ListView) findViewById(R.id.brandlist);

        listView.setAdapter(itemsAdapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                brands.get(position);
                Intent intent = new Intent(MainActivity.this, infoPage.class );
                startActivity(intent);
            }
        });
    }
}

BrandAdapter.java

 package com.example.ofir.myapplication;
    import android.app.Activity;
    import android.support.annotation.NonNull;
    import android.support.annotation.Nullable;
    import android.view.LayoutInflater;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ArrayAdapter;
    import android.widget.ImageView;
    import android.widget.TextView;

    import java.util.ArrayList;

    /**
     * Created by Ofir on 21-Mar-17.
     */
    public class BrandAdapter extends ArrayAdapter<Brands>{

        private int mColorResourceId;

        //Resource id for background color of list

        public BrandAdapter(Activity context, ArrayList<Brands> brands) {
            super(context, 0, brands);
           // mColorResourceId = ColorId;

        }

        @Override
        public View getView(int position,  View convertView, ViewGroup parent) {
            // check if the current view is reused else inflate the view
            View listItemView = convertView;
            if(listItemView == null){
                listItemView = LayoutInflater.from(getContext()).inflate(R.layout.activity_main, parent, false);
            }

            Brands brand_item = getItem(position);

            TextView brandName = (TextView) listItemView.findViewById(R.id.brandtextview);
            brandName.setText(brand_item.getBrand());

            return listItemView;
        }
    }

品牌.java

package com.example.ofir.myapplication;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

/**
 * Created by Ofir on 20-Mar-17.
 */

public class Brands extends AppCompatActivity {

    private String mBrandName;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    public Brands(String brandName){
        mBrandName = brandName;

}

    public String getBrand(){
        return mBrandName;
    }
        }
    }

我正在尝试为Arraylist 添加颜色而不是

brands.add(new Brands("KTM"));

我会得到这行代码：

brands.add(new Brands("KTM", Orange));

文本颜色会相应地变为橙色。

感谢任何形式的帮助。

Answer 1

因此，您希望拥有包含 2 个值、品牌名称和颜色的 Object 列表。 如果是这样，您必须在品牌类别中声明颜色。

public class Brands {

    private String mBrandName;
    private String colour;

    //constructor with 2 arguments, brand name and colour
    public Brands(String brandName, String colour){
        mBrandName = brandName;
        this.colour = colour;
    }

    public String getBrand(){
        return mBrandName;
    }

    public String getColour(){ //getter of colour
        return colour;
    }
}

然后你可以在列表中添加你的颜色（作为字符串，所以在引号中）：

brands.add(new Brands("KTM", "#FF9933")); //#FF9933 means orange in RGB

如果你想显示颜色，那么你必须改变你的适配器，这一行：

brandName.setText(brand_item.getBrand());

到这样的事情：

brandName.setText(brand_item.getBrand());
brandName.setColorText(Color.parseColor(brand_item.getColour()));

有关设置颜色的更多信息，您可以在此处找到：

https://stackoverflow.com/a/4602929/3870382

========= 旧文本

但我强烈建议添加将显示颜色的新 textView，然后在适配器中 findByView（如 brandName）并将 Brand 的颜色分配给新创建的颜色 textView。 p>