在RecyclerView中出现了onActivityResult的问题。

huangapple
go评论118阅读模式
英文:

issue onactivityresult in recyclerview

问题

以下是您提供的代码部分的翻译：

MainActivity（主活动）：

  1. package com.example.myapuuuplication;
  3. import androidx.annotation.Nullable;
  4. import androidx.appcompat.app.AppCompatActivity;
  5. import androidx.recyclerview.widget.LinearLayoutManager;
  6. import androidx.recyclerview.widget.RecyclerView;
  8. import android.content.Intent;
  9. import android.graphics.Color;
  10. import android.net.Uri;
  11. import android.os.Bundle;
  12. import android.view.View;
  13. import android.widget.Button;
  15. import com.sangcomz.fishbun.FishBun;
  16. import com.sangcomz.fishbun.adapter.image.impl.GlideAdapter;
  18. import java.util.ArrayList;
  19. import java.util.List;
  21. public class MainActivity extends AppCompatActivity {
  22.     Adapter adapter = new Adapter();
  23.     List<Modell> uris = new ArrayList<>();
  25.     @Override
  26.     protected void onCreate(Bundle savedInstanceState) {
  27.         super.onCreate(savedInstanceState);
  28.         setContentView(R.layout.activity_main);
  30.         RecyclerView rv = findViewById(R.id.rv);
  31.         rv.setAdapter(adapter);
  32.         rv.setLayoutManager(new LinearLayoutManager(this, RecyclerView.HORIZONTAL, false));
  34.         Button btn = findViewById(R.id.button);
  35.         btn.setOnClickListener(new View.OnClickListener() {
  36.             @Override
  37.             public void onClick(View view) {
  38.                 openpicker();
  39.             }
  40.         });
  41.     }
  43.     private void openpicker() {
  44.         FishBun.with(this)
  45.                 .setImageAdapter(new GlideAdapter())
  46.                 .setMaxCount(3)
  47.                 .setActionBarColor(Color.parseColor("#5D4037"))
  48.                 .startAlbum();
  49.     }
  51.     @Override
  52.     public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
  53.         super.onActivityResult(requestCode, resultCode, data);
  54.         switch (requestCode) {
  55.             case FishBun.FISHBUN_REQUEST_CODE:
  56.                 if (resultCode == RESULT_OK) {
  57.                     uris = data.getParcelableArrayListExtra(FishBun.INTENT_PATH);
  58.                     adapter.setUris(uris);
  59.                     break;
  60.                 }
  61.         }
  62.     }
  63. }

Adapter（适配器）：

  1. package com.example.myapuuuplication;
  3. import android.content.Intent;
  4. import android.net.Uri;
  5. import android.view.LayoutInflater;
  6. import android.view.View;
  7. import android.view.ViewGroup;
  8. import android.widget.ImageView;
  10. import androidx.annotation.NonNull;
  11. import androidx.recyclerview.widget.RecyclerView;
  13. import com.sangcomz.fishbun.FishBun;
  15. import java.util.ArrayList;
  16. import java.util.List;
  18. public class Adapter extends RecyclerView.Adapter<Adapter.VH> {
  20.     List<Modell> uris = new ArrayList<>();
  22.     public void setUris(List<Modell> uris) {
  23.         this.uris = uris;
  24.     }
  26.     @NonNull
  27.     @Override
  28.     public VH onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
  29.         View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.model, parent, false);
  30.         return new VH(view);
  31.     }
  33.     @Override
  34.     public void onBindViewHolder(@NonNull VH holder, int position) {
  35.         Modell modell = uris.get(position);
  36.         VH vh = holder;
  37.         vh.img.setImageURI(modell.getImg());
  38.     }
  40.     @Override
  41.     public int getItemCount() {
  42.         return uris.size();
  43.     }
  45.     public class VH extends RecyclerView.ViewHolder {
  46.         ImageView img;
  48.         public VH(@NonNull View itemView) {
  49.             super(itemView);
  50.             img = itemView.findViewById(R.id.imgmodel);
  51.         }
  52.     }
  53. }

Modell（模型）：

  1. package com.example.myapuuuplication;
  3. import android.net.Uri;
  4. import android.os.Parcel;
  5. import android.os.Parcelable;
  7. public class Modell implements Parcelable {
  8.     Uri img;
  10.     public Modell(Uri img) {
  11.         this.img = img;
  12.     }
  14.     protected Modell(Parcel in) {
  15.         img = in.readParcelable(Uri.class.getClassLoader());
  16.     }
  18.     public static final Creator<Modell> CREATOR = new Creator<Modell>() {
  19.         @Override
  20.         public Modell createFromParcel(Parcel in) {
  21.             return new Modell(in);
  22.         }
  24.         @Override
  25.         public Modell[] newArray(int size) {
  26.             return new Modell[size];
  27.         }
  28.     };
  30.     public Uri getImg() {
  31.         return img;
  32.     }
  34.     public void setImg(Uri img) {
  35.         this.img = img;
  36.     }
  38.     @Override
  39.     public int describeContents() {
  40.         return 0;
  41.     }
  43.     @Override
  44.     public void writeToParcel(Parcel parcel, int i) {
  45.         parcel.writeParcelable(img, i);
  46.     }
  47. }

请注意，我已经按照您的要求只返回了翻译好的部分，没有包含其他内容。如果您有任何问题或需要进一步的帮助，请随时提问。

英文:

i want to add images from gallery and add to arraylist and show them into recyclerview

but cant use onactivityresult in adapter -_-

i used Fishbun for add images from gallery but when i clicking ok the images not showing in recyclerview

im new in android and dont know how to do that

here is my MainActivity:

  1. package com.example.myapuuuplication;
  2. import androidx.annotation.Nullable;
  3. import androidx.appcompat.app.AppCompatActivity;
  4. import androidx.recyclerview.widget.LinearLayoutManager;
  5. import androidx.recyclerview.widget.RecyclerView;
  6. import android.content.Intent;
  7. import android.graphics.Color;
  8. import android.net.Uri;
  9. import android.os.Bundle;
  10. import android.view.View;
  11. import android.widget.Button;
  12. import android.widget.ImageView;
  13. import android.widget.Toast;
  14. import com.sangcomz.fishbun.FishBun;
  15. import com.sangcomz.fishbun.adapter.image.impl.GlideAdapter;
  16. import java.util.ArrayList;
  17. import java.util.List;
  18. public class MainActivity extends AppCompatActivity {
  19. Adapter adapter = new Adapter();
  20. List&lt;Modell&gt; uris = new ArrayList&lt;&gt;();
  21. @Override
  22. protected void onCreate(Bundle savedInstanceState) {
  23. super.onCreate(savedInstanceState);
  24. setContentView(R.layout.activity_main);
  25. RecyclerView rv = findViewById(R.id.rv);
  26. rv.setAdapter(adapter);
  27. rv.setLayoutManager(new LinearLayoutManager(this,RecyclerView.HORIZONTAL,false));
  28. Button btn = findViewById(R.id.button);
  29. btn
  30. .setOnClickListener(new View.OnClickListener() {
  31. @Override
  32. public void onClick(View view) {
  33. openpicker();
  34. }
  35. });
  36. }
  37. private void openpicker() {
  38. FishBun.with(this).setImageAdapter(new GlideAdapter())
  39. .setMaxCount(3)
  40. .setActionBarColor(Color.parseColor(&quot;#5D4037&quot;))
  41. .startAlbum();
  42. }
  43. @Override
  44. public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
  45. super.onActivityResult(requestCode, resultCode, data);
  46. switch (requestCode) {
  47. case FishBun.FISHBUN_REQUEST_CODE:
  48. if (resultCode == RESULT_OK) {
  49. uris = data.getParcelableArrayListExtra(FishBun.INTENT_PATH);
  50. adapter.setUris(uris);
  51. break;
  52. }
  53. }
  54. }
  55. }

Adapter:

  2. package com.example.myapuuuplication;
  3. import android.content.Intent;
  4. import android.net.Uri;
  5. import android.view.LayoutInflater;
  6. import android.view.View;
  7. import android.view.ViewGroup;
  8. import android.widget.ImageView;
  9. import androidx.annotation.NonNull;
  10. import androidx.recyclerview.widget.RecyclerView;
  11. import com.sangcomz.fishbun.FishBun;
  12. import java.util.ArrayList;
  13. import java.util.List;
  14. import static android.app.Activity.RESULT_OK;
  15. public class Adapter extends RecyclerView.Adapter&lt;Adapter.VH&gt; {
  16. List&lt;Modell&gt; uris = new ArrayList&lt;&gt;();
  17. public void setUris(List&lt;Modell&gt; uris) {
  18. this.uris = uris;
  19. }
  20. @NonNull
  21. @Override
  22. public VH onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
  23. View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.model,parent,false);
  24. return new VH(view);
  25. }
  26. @Override
  27. public void onBindViewHolder(@NonNull VH holder, int position) {
  28. Modell modell = uris.get(position);
  29. VH vh = holder;
  30. vh.img.setImageURI(modell.getImg());
  31. }
  32. @Override
  33. public int getItemCount() {
  34. return uris.size();
  35. }
  36. public class VH extends RecyclerView.ViewHolder{
  37. ImageView img;
  38. public VH(@NonNull View itemView) {
  39. super(itemView);
  40. img = itemView.findViewById(R.id.imgmodel);
  41. }
  42. }
  43. }

And Model:

  1. package com.example.myapuuuplication;
  2. import android.net.Uri;
  3. import android.os.Parcel;
  4. import android.os.Parcelable;
  5. public class Modell implements Parcelable {
  6. Uri img;
  7. public Modell(Uri img) {
  8. this.img = img;
  9. }
  10. protected Modell(Parcel in) {
  11. img = in.readParcelable(Uri.class.getClassLoader());
  12. }
  13. public static final Creator&lt;Modell&gt; CREATOR = new Creator&lt;Modell&gt;() {
  14. @Override
  15. public Modell createFromParcel(Parcel in) {
  16. return new Modell(in);
  17. }
  18. @Override
  19. public Modell[] newArray(int size) {
  20. return new Modell[size];
  21. }
  22. };
  23. public Uri getImg() {
  24. return img;
  25. }
  26. public void setImg(Uri img) {
  27. this.img = img;
  28. }
  29. @Override
  30. public int describeContents() {
  31. return 0;
  32. }
  33. @Override
  34. public void writeToParcel(Parcel parcel, int i) {
  35. parcel.writeParcelable(img, i);
  36. }
  37. }

答案1

得分: 1

你正在使用适配器设置

  1. public void setUris(List<Modell> uris) {
  2.     this.uris = uris;
  3. }

但是你还必须让回收视图知道数据发生了变化。
为此，你需要修改函数 setUris，添加 notifyDataSetChanged()。

最终代码：

  1. public void setUris(List<Modell> uris) {
  2.     this.uris = uris;
  3.     notifyDataSetChanged();
  4. }
英文:

You are setting the adapter with

  1. public void setUris(List&lt;Modell&gt; uris) {
  2. this.uris = uris;
  3. }

But you must also let the recycler view know that there is a change in the data.
For that you need to modify the function setUris to include notifyDataSetChanged()

Final code:

  1. public void setUris(List&lt;Modell&gt; uris) {
  2. this.uris = uris;
  3. notifyDataSetChanged();
  4. }

huangapple
  • 本文由 发表于 2020年8月19日 17:55:15
  • 转载请务必保留本文链接：https://go.coder-hub.com/63484445.html
  • android
  • android-recyclerview
  • java
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