Android 如何在带有片段的RecyclerView适配器中使用RecyclerView？

我的

SavedActivity.java

：

import android.os.Environment;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import java.io.File;
import java.util.ArrayList;

public class SavedActivity extends Fragment {
private static final String Saved  = "/MyApp";
public SavedActivity() {
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View inflatedView = LayoutInflater.from(container.getContext()).inflate(R.layout.recycler_view_adapter_saved,container, false);
    RecyclerView RecyclerViewMediaList =   (RecyclerView)inflatedView.findViewById(R.id.recycler_View);
    RecyclerViewMediaList.setLayoutManager(new   LinearLayoutManager(getActivity()));
    //Error On the line below
    RecyclerViewAdapterSaved recyclerViewMediaAdapter = new RecyclerViewAdapterSaved(this.getListFiles(new File(Environment.getExternalStorageDirectory().toString()+ Saved)), SavedActivity.this));
    RecyclerViewMediaList.setAdapter(recyclerViewMediaAdapter);
    return inflatedView;
}

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

private ArrayList<File> getListFiles(File parentDir) {
    ArrayList<File> inFiles = new ArrayList<>();
    File[] files;
    files = parentDir.listFiles();
    if (files != null) {
        for (File file : files) {
            if (file.getName().endsWith(".jpg"))
            {
                if (!inFiles.contains(file))
                    inFiles.add(file);
            }
        }
    }
    return inFiles;
}
}

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
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 java.io.File;
import java.util.ArrayList;

public class RecyclerViewAdapterSaved extends RecyclerView.Adapter<RecyclerViewAdapterSaved.FileHolder> {
private ArrayList<File> filesList;
private Activity activity;

RecyclerViewAdapterSaved(ArrayList<File> filesList, Activity activity){
    this.filesList = filesList;
    this.activity = activity;
}

@Override
public RecyclerViewAdapterSaved.FileHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View inflatedView = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_view_adapter_saved, parent, false);
    return new FileHolder(inflatedView);
}

@Override
public void onBindViewHolder(final RecyclerViewAdapterSaved.FileHolder holder, final int position) {
    final File currentFile = filesList.get(position);
    showImages(currentFile,holder,position);


}

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

public static class FileHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    ImageView imageViewSaved;
     CardView cardviewImageViewSaved;

    public FileHolder(View itemView) {
        super(itemView);
        imageViewSaved = (ImageView) itemView.findViewById(R.id.imageView);
        itemView.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {

    }
public void showImages(final File currentFile, final RecyclerViewAdapterSaved.FileHolder holder, final int position){
    holder.cardviewImageViewSaved.setVisibility(View.VISIBLE);
    Bitmap statusBitmap = BitmapFactory.decodeFile(currentFile.getAbsolutePath());
    holder.imageViewSaved.setImageBitmap(statusBitmap);


}
}

My

RecycleServiceAdapterSaved.java

：

import android.os.Environment;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import java.io.File;
import java.util.ArrayList;

public class SavedActivity extends Fragment {
private static final String Saved  = "/MyApp";
public SavedActivity() {
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View inflatedView = LayoutInflater.from(container.getContext()).inflate(R.layout.recycler_view_adapter_saved,container, false);
    RecyclerView RecyclerViewMediaList =   (RecyclerView)inflatedView.findViewById(R.id.recycler_View);
    RecyclerViewMediaList.setLayoutManager(new   LinearLayoutManager(getActivity()));
    //Error On the line below
    RecyclerViewAdapterSaved recyclerViewMediaAdapter = new RecyclerViewAdapterSaved(this.getListFiles(new File(Environment.getExternalStorageDirectory().toString()+ Saved)), SavedActivity.this));
    RecyclerViewMediaList.setAdapter(recyclerViewMediaAdapter);
    return inflatedView;
}

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

private ArrayList<File> getListFiles(File parentDir) {
    ArrayList<File> inFiles = new ArrayList<>();
    File[] files;
    files = parentDir.listFiles();
    if (files != null) {
        for (File file : files) {
            if (file.getName().endsWith(".jpg"))
            {
                if (!inFiles.contains(file))
                    inFiles.add(file);
            }
        }
    }
    return inFiles;
}
}

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
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 java.io.File;
import java.util.ArrayList;

public class RecyclerViewAdapterSaved extends RecyclerView.Adapter<RecyclerViewAdapterSaved.FileHolder> {
private ArrayList<File> filesList;
private Activity activity;

RecyclerViewAdapterSaved(ArrayList<File> filesList, Activity activity){
    this.filesList = filesList;
    this.activity = activity;
}

@Override
public RecyclerViewAdapterSaved.FileHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View inflatedView = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_view_adapter_saved, parent, false);
    return new FileHolder(inflatedView);
}

@Override
public void onBindViewHolder(final RecyclerViewAdapterSaved.FileHolder holder, final int position) {
    final File currentFile = filesList.get(position);
    showImages(currentFile,holder,position);


}

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

public static class FileHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    ImageView imageViewSaved;
     CardView cardviewImageViewSaved;

    public FileHolder(View itemView) {
        super(itemView);
        imageViewSaved = (ImageView) itemView.findViewById(R.id.imageView);
        itemView.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {

    }
public void showImages(final File currentFile, final RecyclerViewAdapterSaved.FileHolder holder, final int position){
    holder.cardviewImageViewSaved.setVisibility(View.VISIBLE);
    Bitmap statusBitmap = BitmapFactory.decodeFile(currentFile.getAbsolutePath());
    holder.imageViewSaved.setImageBitmap(statusBitmap);


}
}

导入android.app.Activity；
导入android.content.Intent；
导入android.graphics.Bitmap；
导入android.graphics.BitmapFactory；
导入android.support.v7.widget.CardView；
导入android.support.v7.widget.RecyclerView；
导入android.view.LayoutInflater；
导入android.view.view；
导入android.view.ViewGroup；
导入android.widget.ImageView；
导入java.io.File；
导入java.util.ArrayList；
公共类RecycleServiceAdapterSaved扩展了RecyclerView.Adapter{
私有ArrayList文件列表；
私人活动；
RecycleServiceAdapterSaved（ArrayList文件列表，活动）{
this.filesList=filesList；
这个。活动=活动；
}
@凌驾
public RecycleServiceAdapterSaved.FileHolder onCreateViewHolder（视图组父级，int-viewType）{
View inflatedView=LayoutFlater.from（parent.getContext（））.inflate（R.layout.recycler\u View\u adapter\u saved，parent，false）；
返回新的文件持有者（充气视图）；
}
@凌驾
BindViewHolder上的公共无效（最终RecycleServiceAdapterSaved.FileHolder，最终int位置）{
最终文件currentFile=filesList.get（位置）；
显示图像（当前文件、支架、位置）；
}
@凌驾
public int getItemCount（）{
返回filesList.size（）；
}
公共静态类FileHolder扩展了RecyclerView.ViewHolder实现了View.OnClickListener{
ImageView ImageView已保存；
CardView cardviewImageViewSaved；
公共文件持有者（查看项目视图）{
超级（项目视图）；
imageViewSaved=（ImageView）itemView.findViewById（R.id.ImageView）；
setOnClickListener（这个）；
}
@凌驾
公共void onClick（视图v）{
}
public void showImages（最终文件currentFile，最终回收服务adaptersaved.FileHolder holder，最终整型位置）{
holder.cardviewImageViewSaved.setVisibility（View.VISIBLE）；
位图状态位图=BitmapFactory.decodeFile（currentFile.getAbsolutePath（））；
holder.imageViewSaved.setImageBitmap（状态位图）；
}
}

在

ppCompactActivity

中使用时，相同的代码正在工作，但在

Fragment

中使用时显示错误

错误（鼠标悬停在线路上）：

RecycleServiceAdapterSaved（ArrayList），android:app.Activity in 无法应用RecycleServiceAdapterSaved

---

你在这方面有错误

//Error On the line below
RecyclerViewAdapterSaved recyclerViewMediaAdapter = new RecyclerViewAdapterSaved(this.getListFiles(new File(Environment.getExternalStorageDirectory().toString()+ Saved)), SavedActivity.this));

注意：

SavedActivity。在这种情况下，此

不是活动

所以正确的代码是

RecyclerViewAdapterSaved recyclerViewMediaAdapter = new RecyclerViewAdapterSaved(this.getListFiles(new File(Environment.getExternalStorageDirectory().toString()+ Saved)), getActivity()));

用

getActivity（）