我正在尝试读取我的外部文本文件中的所有内容，并将其放入一个数组列表中，该列表通过宗地类发送给另一个类。虽然我可以在textview上设置字符串，但不能在图像上设置字符串。
外部文本文件中的其中一行如下所示：
McDonalds| Any McDonalds outlet| Applicable to any lunch meal set| Buy 1 get 1 free| 1 Aug - 31 Aug| RM 32.00| RM 16.00| icon_nandos.png
MainActivity.java：
public class MainActivity extends AppCompatActivity implements listAdapter.sendInfo{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
list_fragment lf = new list_fragment();
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.mainAct, lf);
fragmentTransaction.commit();
}
@Override
public void detailInfo(outletData outDat, int pos) {
fragmentDetail fd = fragmentDetail.newInstance(outDat);
getSupportFragmentManager().beginTransaction()
.replace(R.id.mainAct, fd)
.addToBackStack(null)
.commit();
}
}
list_fragment.java：
public class list_fragment extends Fragment {
ArrayList<outletData> outletDatas = new ArrayList<outletData>();
BufferedReader bufferedReader = null;
String food;
public View onCreateView( LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_list, container, false);
RecyclerView recyclerView = view.findViewById(R.id.fragRecycler);
outletDatas.clear();
try{
bufferedReader = new BufferedReader(new
InputStreamReader(getContext().getAssets().open("food_catalog.txt")));
while ((food = bufferedReader.readLine())!=null) {
if (!food.equals("")) {
String[] foodInfo = food.split("\\|");
outletDatas.add(new outletData(foodInfo[0], foodInfo[1], foodInfo[2], foodInfo[3], foodInfo[4], foodInfo[5], foodInfo[6], foodInfo[7]));
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (bufferedReader != null) {
try {
bufferedReader.close();
}catch (Exception e) {
e.printStackTrace();
}
}
}
listAdapter mylistAdapter = new listAdapter(outletDatas, getContext());
recyclerView.setAdapter(mylistAdapter);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity());
recyclerView.setLayoutManager(layoutManager);
return view;
}
}
outletData.java：
package com.example.user.assignmentthreethree;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Parcel;
import android.os.Parcelable;
public class outletData implements Parcelable {
private String name, location, details, deals, offerPeriod, normalPrice, discountPrice, imagePath;
public outletData(String name, String location, String details, String deals, String offerPeriod, String normalPrice, String discountPrice, String imagePath) {
this.name = name;
this.location = location;
this.details = details;
this.deals = deals;
this.offerPeriod = offerPeriod;
this.normalPrice = normalPrice;
this.discountPrice = discountPrice;
this.imagePath = imagePath;
}
private outletData(Parcel in) {
name = in.readString();
location = in.readString();
details = in.readString();
deals = in.readString();
offerPeriod = in.readString();
normalPrice = in.readString();
discountPrice = in.readString();
imagePath = in.readString();
}
public static final Creator<outletData> CREATOR = new Creator<outletData>() {
@Override
public outletData createFromParcel(Parcel in) {
return new outletData(in);
}
@Override
public outletData[] newArray(int size) {
return new outletData[size];
}
};
public String getName() {
return name;
}
public String getLocation() {
return location;
}
public String getDetails() {
return details;
}
public String getDeals() {
return deals;
}
public String getOfferPeriod() {
return offerPeriod;
}
public String getNormalPrice() {
return normalPrice;
}
public String getDiscountPrice() {
return discountPrice;
}
public String getImagePath() {
return imagePath;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeString(name);
parcel.writeString(location);
parcel.writeString(details);
parcel.writeString(deals);
parcel.writeString(offerPeriod);
parcel.writeString(normalPrice);
parcel.writeString(discountPrice);
parcel.writeString(imagePath);
}
}
listAdapter.java：
public class listAdapter extends RecyclerView.Adapter<listAdapter.ViewHolder> {
ArrayList<outletData> outletDataFromFragment;
RecyclerView recyclerView;
Context mContext;
listAdapter(ArrayList<outletData> outletDataFromFragment) {
this.outletDataFromFragment = outletDataFromFragment;
}
@Override
public listAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
this.mContext = viewGroup.getContext();
View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, viewGroup, false);
return new ViewHolder(itemView);
}
@Override
public void onBindViewHolder(@NonNull listAdapter.ViewHolder viewHolder, int i) {
outletData data = outletDataFromFragment.get(i);
viewHolder.listName.setText(data.getName());
viewHolder.listDeal.setText(data.getDeals());
viewHolder.listOffer.setText(data.getOfferPeriod());
// viewHolder.listImg.setImageURI(Uri.parse(data.getImagePath()));
try {
InputStream ims = mContext.getAssets().open(""+data.getImagePath().trim());
Drawable d = Drawable.createFromStream(ims, null);
viewHolder.listImg.setImageDrawable(d);
ims.close();
} catch (IOException ex) {
return;
}
}
@Override
public int getItemCount() {
return outletDataFromFragment.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView listName, listDeal, listOffer;
ImageView listImg;
public ViewHolder(View itemView) {
super(itemView);
listName = (TextView)itemView.findViewById(R.id.txtName);
listDeal = (TextView)itemView.findViewById(R.id.txtDeals);
listOffer = (TextView)itemView.findViewById(R.id.txtOffer);
listImg = (ImageView)itemView.findViewById(R.id.imgFood);
recyclerView = (RecyclerView)itemView.findViewById(R.id.reCyclerView);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View view) {
((sendInfo)view.getContext()).detailInfo(outletDataFromFragment.get(getLayoutPosition()), getLayoutPosition());
}
}
interface sendInfo {
void detailInfo(outletData outletData, int pos);
}
}
fragmentDetail.java：
public class fragmentDetail extends Fragment {
TextView fragName, fragDeal, fragOffer, fragDetail, fragOldPrice, fragNewPrice, fragLocation;
ImageView fragImage;
outletData OD;
Bundle bundle;
public fragmentDetail() {}
public static fragmentDetail newInstance(outletData oData) {
fragmentDetail fragmentDetail = new fragmentDetail();
Bundle b = new Bundle();
b.putParcelable("pData", oData);
fragmentDetail.setArguments(b);
return fragmentDetail;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
bundle = this.getArguments();
OD = bundle.getParcelable("pData");
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_detail, container, false);
fragName = (TextView)view.findViewById(R.id.frag_name);
fragDeal = (TextView)view.findViewById(R.id.frag_Deal);
fragOffer = (TextView)view.findViewById(R.id.frag_Offer);
fragDetail = (TextView)view.findViewById(R.id.frag_Detail);
fragOldPrice = (TextView)view.findViewById(R.id.frag_oldPrice);
fragNewPrice = (TextView)view.findViewById(R.id.frag_newPrice);
fragLocation = (TextView)view.findViewById(R.id.frag_location);
fragImage = (ImageView)view.findViewById(R.id.frag_image);
Toast.makeText(getContext(), OD.getImagePath(), Toast.LENGTH_LONG).show();
fragOldPrice.setPaintFlags(fragOldPrice.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);
fragName.setText(OD.getName());
fragDeal.setText(OD.getDeals());
fragOffer.setText(OD.getOfferPeriod());
fragDetail.setText(OD.getDetails());
fragOldPrice.setText(OD.getNormalPrice());
fragNewPrice.setText(OD.getDiscountPrice());
fragLocation.setText(OD.getLocation());
fragImage.setImageURI(Uri.parse(OD.getImagePath()));
return view;
}
}
根据在线建议，我尝试修剪字符串，但不会改变结果。我仍在学习Android Studio的逻辑流程和语法，但是我不知道为什么即使图像与文本文件（Assests）在同一文件夹中，它也无法获取图像，却确实获取了food [7]字符串当我尝试将其打印时为icon_nandos.png。
答案 0 :(得分：0)
您可以尝试从资产文件获取可绘制对象并将其设置为imageview。使用以下代码。
try {
InputStream ims = getAssets().open(""+your_image_name);
Drawable d = Drawable.createFromStream(ims, null);
mImage.setImageDrawable(d);
ims.close();
} catch(IOException ex) {
return;
}
所以您需要按如下所示编辑代码。
public class listAdapter extends RecyclerView.Adapter<listAdapter.ViewHolder> {
ArrayList<outletData> outletDataFromFragment;
RecyclerView recyclerView;
Context mContext;
listAdapter(ArrayList<outletData> outletDataFromFragment) {
this.outletDataFromFragment = outletDataFromFragment;
}
@Override
public listAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
this.mContext = viewGroup.getContext();
View itemView = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_item, viewGroup, false);
return new ViewHolder(itemView);
}
@Override
public void onBindViewHolder(@NonNull listAdapter.ViewHolder viewHolder, int i) {
outletData data = outletDataFromFragment.get(i);
viewHolder.listName.setText(data.getName());
viewHolder.listDeal.setText(data.getDeals());
viewHolder.listOffer.setText(data.getOfferPeriod());
try {
InputStream ims = mContext.getAssets().open(""+your_image_name);
Drawable d = Drawable.createFromStream(ims, null);
viewHolder.listImg.setImageDrawable(d);
ims.close();
} catch(IOException ex) {
return;
}
}