在没有 findViewById() 的情况下以编程方式更改可绘制 xml 文件的颜色

Question

所以我想做的是..

1. 获取可绘制形状（xml 文件）
2. 获取drawable的颜色
3. 使用 colors.xml 中可用的颜色更改其颜色
4. 将 drawable 设置为 CardView 上的某个 ImageView（这不是问题）

这里是代码：-

colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="md_red_900">#B71C1C</color>
    <color name="md_pink_900">#880E4F</color>
    <color name="md_purple_900">#4A148C</color>
    <color name="md_deep_purple_900">#311B92</color>
    ...
    <!--15 more colors-->
</resources>

shape_template.xml（可绘制形状）：-

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape>
            <solid android:color="@color/md_white_1000" />
        </shape>
    </item>
</selector>

MainColorPaletteAdapter.java（我想改变drawable的颜色）：-

package com.danish.foveros.adapter;

import android.graphics.drawable.Drawable;
import android.media.Image;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.danish.foveros.R;  
import java.util.ArrayList;
import java.util.List;

public class MainColorPaletteAdapter extends RecyclerView.Adapter<MainColorPaletteAdapter.ViewHolder> {
    List<MainColorPaletteGetSet> mItems;
    String[] colorName;
    int[] colorThumbnail;
    int[] allMaterialColor900;
    int[] colorNameBackgroundColor;

    public MainColorPaletteAdapter() {
        super();
        mItems = new ArrayList<MainColorPaletteGetSet>();
        MainColorPaletteGetSet color;

        colorName = new String[]{"Amber", "Brown", "Cyan", "Teal"};
        colorThumbnail = new int[]{R.drawable.amber, R.drawable.brown,
                R.drawable.cyan, R.drawable.teal};
        colorNameBackgroundColor = new int[]{R.color.md_amber_900, R.color.md_brown_900,
                R.color.md_cyan_900, R.color.md_teal_900};

        for (int i = 0; i < colorName.length; i++) {
            color = new MainColorPaletteGetSet();
            color.setColorName(colorName[i]);
            color.setColorThumbnail(colorThumbnail[i]);
            color.setColorNameBackgroundColor(colorNameBackgroundColor[i]);
            mItems.add(color);
        }    
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
        View v = LayoutInflater
                .from(viewGroup.getContext())
                .inflate(R.layout.fragment_home_data, viewGroup, false);
        ViewHolder viewHolder = new ViewHolder(v);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        MainColorPaletteGetSet color = mItems.get(position);
        holder.colorThumbnail.setImageResource(color.getColorThumbnail());
        holder.colorName.setText(color.getColorName());
        holder.colorName.setBackgroundColor(color.getColorNameBackgroundColor());

    }

    @Override
    public int getItemCount() {
        return mItems.size();
    }

    public class ViewHolder extends RecyclerView.ViewHolder {

        public ImageView colorThumbnail;
        public TextView colorName;

        public ViewHolder(View itemView) {
            super(itemView);
            colorThumbnail = (ImageView) itemView.findViewById(R.id.colorThumbnail);
            colorName = (TextView) itemView.findViewById(R.id.colorName);

        }
    }
}

我尝试了很多方法，但他们说要通过 findViewById() 获取 View 的可绘制或背景颜色，但这对我不起作用。

正如您所见，可绘制形状是一个非常简单的形状，因此它可能并不难做到。

我想改为创建 19 个可绘制的 xml 文件，我可以获得一个可绘制的更改它的颜色，将其用于第一个 cardview 更改它的颜色并将其用于第二个 cardview 等等。

如果需要，请询问更多信息。

感谢任何帮助。谢谢。

Answer 1

自己解决了：-

package com.danish.foveros.adapter;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.media.Image;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.danish.foveros.R;

import java.util.ArrayList;
import java.util.List;

public class MainColorPaletteAdapter extends RecyclerView.Adapter<MainColorPaletteAdapter.ViewHolder> {
    List<MainColorPaletteGetSet> mItems;
    String[] colorName;
    int[] colorThumbnail;
    int[] allMaterialColor900;
    int[] colorNameBackgroundColor;

    public MainColorPaletteAdapter() {
        super();
        mItems = new ArrayList<MainColorPaletteGetSet>();
        MainColorPaletteGetSet color;
        colorNameBackgroundColor = new int[]{
                R.color.md_red_900,
                R.color.md_pink_900,
                R.color.md_purple_900,
                R.color.md_deep_purple_900,
                R.color.md_indigo_900,
                R.color.md_blue_900,
                R.color.md_light_blue_900,
                R.color.md_cyan_900,
                R.color.md_teal_900,
                R.color.md_green_900,
                R.color.md_light_green_900,
                R.color.md_lime_900,
                R.color.md_yellow_900,
                R.color.md_amber_900,
                R.color.md_orange_900,
                R.color.md_deep_orange_900,
                R.color.md_brown_900,
                R.color.md_grey_900,
                R.color.md_blue_grey_900
        };

        colorName = new String[]{
                "Red",
                "Pink",
                "Purple",
                "Deep Purple",
                "Indigo",
                "Blue",
                "Light Blue",
                "Cyan",
                "Teal",
                "Green",
                "Light Green",
                "Lime",
                "Yellow",
                "Amber",
                "Orange",
                "Deep Orange",
                "Brown",
                "Grey",
                "Blue Grey"
        };
        colorThumbnail = new int[]{
                R.color.md_red_500,
                R.color.md_pink_500,
                R.color.md_purple_500,
                R.color.md_deep_purple_500,
                R.color.md_indigo_500,
                R.color.md_blue_500,
                R.color.md_light_blue_500,
                R.color.md_cyan_500,
                R.color.md_teal_500,
                R.color.md_green_500,
                R.color.md_light_green_500,
                R.color.md_lime_500,
                R.color.md_yellow_500,
                R.color.md_amber_500,
                R.color.md_orange_500,
                R.color.md_deep_orange_500,
                R.color.md_brown_500,
                R.color.md_grey_500,
                R.color.md_blue_grey_500
        };


        for (int i = 0; i < colorName.length; i++) {
            color = new MainColorPaletteGetSet();
            color.setColorName(colorName[i]);
            color.setColorThumbnail(colorThumbnail[i]);
            color.setColorNameBackgroundColor(colorNameBackgroundColor[i]);
            mItems.add(color);
        }


    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
        View v = LayoutInflater
                .from(viewGroup.getContext())
                .inflate(R.layout.fragment_home_data, viewGroup, false);
        ViewHolder viewHolder = new ViewHolder(v);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        MainColorPaletteGetSet color = mItems.get(position);
        holder.colorThumbnailView.setBackgroundResource(color.getColorThumbnail());
        holder.colorNameView.setText(color.getColorName());
        holder.colorNameView.setBackgroundResource(color.getColorNameBackgroundColor());
    }

    @Override
    public int getItemCount() {
        return mItems.size();
    }


    public class ViewHolder extends RecyclerView.ViewHolder {

        public ImageView colorThumbnailView;
        public TextView colorNameView;



        public ViewHolder(final View itemView) {
            super(itemView);
            colorThumbnailView = (ImageView) itemView.findViewById(R.id.colorThumbnail);
            colorNameView = (TextView) itemView.findViewById(R.id.colorName);
        }

    }
}

最终输出：-