Java 如何实现这一观点

我创建了一个应用程序，它使用RecycleServiceAdapter在gridview中显示来自内部存储的所有文件。但我不知道如何为不同的文件类型显示不同的图标。我想有所成就。就像它有不同的文件夹图标，不同的pdf文件或图像。我怎样才能做到这一点

InternalStorage.java：

MyRecycleServiceAdapter.java：

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首先，你需要创建一个模型，使你能够区分每种动物和其他动物。你可以使用一个模型，它有一个名称和一个图像url，每个动物的图像url，你可以根据动物的类型进行设置。在这之后，您必须定义一个imageView，它将拥有新的图像，该图像将与您从url带来的图像一起膨胀。要加载图像，我建议您使用毕加索，毕加索是一个使加载任何类型图像更容易的库

代码是这样的

public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {

    private ArrayList<Animal> mData;
    private LayoutInflater mInflater;
    private ItemClickListener mClickListener;

    // data is passed into the constructor
    public MyRecyclerViewAdapter(Context context, ArrayList<String> data) {
        this.mInflater = LayoutInflater.from(context);
        this.mData = data;
    }

    // inflates the cell layout from xml when needed
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mInflater.inflate(R.layout.recyclerview_item, parent, false);
        return new ViewHolder(view);
    }

    // binds the data to the textview in each cell
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        Animal animal = mData.get(position);
        holder.myTextView.setText(animal);
        Picasso.with(context).load(animal.imageUrl).into(holder.imageViewYouWantToChangue)
    }

    // total number of cells
    @Override
    public int getItemCount() {
        return mData.size();
    }


    // stores and recycles views as they are scrolled off screen
    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        TextView myTextView;
        ImageButton myImage;

        ViewHolder(View itemView) {
            super(itemView);
            myTextView = (TextView) itemView.findViewById(R.id.info_text);
            myImage = (ImageButton) itemView.findViewById(R.id.buttonimage);
            imageViewYouWantToChangue = (ImageView) itemView.findViewById(R.id.image_you_to_changue);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
        }
    }

    // convenience method for getting data at click position
    public String getItem(int id) {
        return mData.get(id);
    }

    // allows clicks events to be caught
    public void setClickListener(ItemClickListener itemClickListener) {
        this.mClickListener = itemClickListener;
    }

    // parent activity will implement this method to respond to click events
    public interface ItemClickListener {
        void onItemClick(View view, int position);
    }
}}

public class Animal{
    String name;
    String imageUrl;

    public Animal(String name, String type) {
        this.name = name;
        this.imageUrl = imageUrl;
    }
}

关于毕加索的信息

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别忘了在清单中为你的应用程序添加互联网许可。

与我们分享你已经拥有的代码。@JhonFredyTrujilloOrtega阅读问题；OP想要密码。我创建了一个应用程序，使用RecycleServiceAdapter在gridview中显示内部存储的所有文件。没有代码？你能和我们分享你的代码吗？这样我们就可以知道需要调整/添加什么了@jhonfredytrujilloortega这个例子如何回答他的问题？

public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {

private ArrayList<String> mData;
private LayoutInflater mInflater;
private ItemClickListener mClickListener;

        // data is passed into the constructor
        public MyRecyclerViewAdapter(Context context, ArrayList<String> data) {
        this.mInflater = LayoutInflater.from(context);
        this.mData = data;
        }

// inflates the cell layout from xml when needed
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mInflater.inflate(R.layout.recyclerview_item, parent, false);
        return new ViewHolder(view);
        }

// binds the data to the textview in each cell
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
        String animal = mData.get(position);
        holder.myTextView.setText(animal);
        }

// total number of cells
@Override
public int getItemCount() {
        return mData.size();
        }


// stores and recycles views as they are scrolled off screen
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
    TextView myTextView;
    ImageButton myImage;

    ViewHolder(View itemView) {
        super(itemView);
        myTextView = (TextView) itemView.findViewById(R.id.info_text);
        myImage = (ImageButton) itemView.findViewById(R.id.buttonimage);
        itemView.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
    }
}

    // convenience method for getting data at click position
    public String getItem(int id) {
        return mData.get(id);
    }

    // allows clicks events to be caught
    public void setClickListener(ItemClickListener itemClickListener) {
        this.mClickListener = itemClickListener;
    }

// parent activity will implement this method to respond to click events
public interface ItemClickListener {
    void onItemClick(View view, int position);
}
}

public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder> {

    private ArrayList<Animal> mData;
    private LayoutInflater mInflater;
    private ItemClickListener mClickListener;

    // data is passed into the constructor
    public MyRecyclerViewAdapter(Context context, ArrayList<String> data) {
        this.mInflater = LayoutInflater.from(context);
        this.mData = data;
    }

    // inflates the cell layout from xml when needed
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mInflater.inflate(R.layout.recyclerview_item, parent, false);
        return new ViewHolder(view);
    }

    // binds the data to the textview in each cell
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        Animal animal = mData.get(position);
        holder.myTextView.setText(animal);
        Picasso.with(context).load(animal.imageUrl).into(holder.imageViewYouWantToChangue)
    }

    // total number of cells
    @Override
    public int getItemCount() {
        return mData.size();
    }


    // stores and recycles views as they are scrolled off screen
    public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        TextView myTextView;
        ImageButton myImage;

        ViewHolder(View itemView) {
            super(itemView);
            myTextView = (TextView) itemView.findViewById(R.id.info_text);
            myImage = (ImageButton) itemView.findViewById(R.id.buttonimage);
            imageViewYouWantToChangue = (ImageView) itemView.findViewById(R.id.image_you_to_changue);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            if (mClickListener != null) mClickListener.onItemClick(view, getAdapterPosition());
        }
    }

    // convenience method for getting data at click position
    public String getItem(int id) {
        return mData.get(id);
    }

    // allows clicks events to be caught
    public void setClickListener(ItemClickListener itemClickListener) {
        this.mClickListener = itemClickListener;
    }

    // parent activity will implement this method to respond to click events
    public interface ItemClickListener {
        void onItemClick(View view, int position);
    }
}}

public class Animal{
    String name;
    String imageUrl;

    public Animal(String name, String type) {
        this.name = name;
        this.imageUrl = imageUrl;
    }
}