update recyclerview Inhalte schlagen im unteren Blatt fehl

Question

Ich möchte den Listeninhalt in einer unteren Blattansicht ändern, obwohl click -Ereignis, aber ich habe nur ein leeres Blatt. Hier ist eine Demoversion von BottomSheetSample (github.com/niravkalola/BottomSheetSample).

mainActivity.java

package com.nkdroid.bottomsheetsample; 

import android.content.DialogInterface; 
import android.os.Bundle; 
import android.support.annotation.NonNull; 
import android.support.design.widget.BottomSheetBehavior; 
import android.support.design.widget.BottomSheetDialog; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.view.View; 
import android.widget.Button; 

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

public class MainActivity extends AppCompatActivity implements ItemAdapter.ItemListener { 

private Button btnView, btnDialog; 
BottomSheetBehavior behavior; 
private BottomSheetDialog mBottomSheetDialog; 
private ItemAdapter mAdapter; 
RecyclerView recyclerView; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    btnView = (Button) findViewById(R.id.btnView); 
    btnDialog = (Button) findViewById(R.id.btnDialog); 
    btnView.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      mAdapter = new ItemAdapter(createItems()); 
      recyclerView.setAdapter(mAdapter); 
      behavior.setState(BottomSheetBehavior.STATE_EXPANDED); 
     } 
    }); 

    btnDialog.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      showBottomSheetDialog(); 
     } 
    }); 

    View bottomSheet = findViewById(R.id.bottom_sheet); 
    behavior = BottomSheetBehavior.from(bottomSheet); 
    behavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() { 
     @Override 
     public void onStateChanged(@NonNull View bottomSheet, int newState) { 
      // React to state change 
     } 

     @Override 
     public void onSlide(@NonNull View bottomSheet, float slideOffset) { 
      // React to dragging events 
     } 
    }); 

    recyclerView = (RecyclerView) findViewById(R.id.recyclerView); 
    recyclerView.setHasFixedSize(true); 
    recyclerView.setLayoutManager(new LinearLayoutManager(this)); 

    mAdapter = new ItemAdapter(createItems(), this); 
    recyclerView.setAdapter(mAdapter); 

} 


private void showBottomSheetDialog() { 
    if (behavior.getState() == BottomSheetBehavior.STATE_EXPANDED) { 
     behavior.setState(BottomSheetBehavior.STATE_COLLAPSED); 
    } 

    mBottomSheetDialog = new BottomSheetDialog(this); 
    View view = getLayoutInflater().inflate(R.layout.sheet, null); 
    RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.recyclerView); 
    recyclerView.setHasFixedSize(true); 
    recyclerView.setLayoutManager(new LinearLayoutManager(this)); 
    recyclerView.setAdapter(new ItemAdapter(createItems(), new ItemAdapter.ItemListener() { 
     @Override 
     public void onItemClick(Item item) { 
      if (mBottomSheetDialog != null) { 
       mBottomSheetDialog.dismiss(); 
      } 
     } 
    })); 

    mBottomSheetDialog.setContentView(view); 
    mBottomSheetDialog.show(); 
    mBottomSheetDialog.setOnDismissListener(new DialogInterface.OnDismissListener() { 
     @Override 
     public void onDismiss(DialogInterface dialog) { 
      mBottomSheetDialog = null; 
     } 
    }); 
} 


@Override 
protected void onDestroy() { 
    super.onDestroy(); 
    mAdapter.setListener(null); 
} 

public List<Item> createItems() { 
    Random r = new Random(); 
    ArrayList<Item> items = new ArrayList<>(); 
    items.add(new Item(R.mipmap.ic_launcher, "Item 1"+ r.nextInt(100))); 
    items.add(new Item(R.mipmap.ic_launcher, "Item 2")); 
    items.add(new Item(R.mipmap.ic_launcher, "Item 3")); 
    items.add(new Item(R.mipmap.ic_launcher, "Item 4")); 
    return items; 
} 

@Override 
public void onItemClick(Item item) { 
    behavior.setState(BottomSheetBehavior.STATE_COLLAPSED); 
} 

} 

ItemAdapter.java:

package com.nkdroid.bottomsheetsample; 

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 java.util.List; 


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

private List<Item> mItems; 
private ItemListener mListener; 

public ItemAdapter(List<Item> items, ItemListener listener) { 
    mItems = items; 
    mListener = listener; 
} 

public ItemAdapter(List<Item> items) { 
    mItems = items; 
} 

public void setListener(ItemListener listener) { 
    mListener = listener; 
} 

@Override 
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    return new ViewHolder(LayoutInflater.from(parent.getContext()) 
      .inflate(R.layout.adapter, parent, false)); 
} 

@Override 
public void onBindViewHolder(ViewHolder holder, int position) { 
    holder.setData(mItems.get(position)); 
} 

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

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

    public ImageView imageView; 
    public TextView textView; 
    public Item item; 

    public ViewHolder(View itemView) { 
     super(itemView); 
     itemView.setOnClickListener(this); 
     imageView = (ImageView) itemView.findViewById(R.id.imageView); 
     textView = (TextView) itemView.findViewById(R.id.textView); 
    } 

    public void setData(Item item) { 
     this.item = item; 
     imageView.setImageResource(item.getDrawableResource()); 
     textView.setText(item.getTitle()); 
    } 

    @Override 
    public void onClick(View v) { 
     if (mListener != null) { 
      mListener.onItemClick(item); 
     } 
    } 
} 

public interface ItemListener { 
    void onItemClick(Item item); 
} 
} 

Hier sind die Aufnahmen nach dem Klick Show Ansicht Taste für das erste und zweite Mal: ​​ first click second click

Answer 1

Dies ist in 24.0.0 behoben, d. H. Die RecyclerView wird aktualisiert. Wenn Sie jedoch wrap_content sowohl auf der Unterseite als auch auf der Recycler-Ansicht verwenden, müssen Sie dies verwenden, damit die Höhe der unteren Seite korrekt berechnet wird.

bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() { 
      @Override 
      public void onStateChanged(@NonNull View bottomSheet, int newState) { 

       if(newState==BottomSheetBehavior.STATE_EXPANDED){ 
        bottomSheet.requestLayout(); 

        /*or 
        recyclerView.scrollToPosition(0); 
        recyclerView.requestLayout();*/ 

       } 
      } 

      @Override 
      public void onSlide(@NonNull View bottomSheet, float slideOffset) { 

      } 
     }); 

Wenn Sie mit früheren Versionen

bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() { 
      @Override 
      public void onStateChanged(@NonNull View bottomSheet, int newState) { 

       if(newState==BottomSheetBehavior.STATE_EXPANDED){ 
        bottomSheet.requestLayout(); 
        bottomSheet.invalidate(); 
       } 
      } 

      @Override 
      public void onSlide(@NonNull View bottomSheet, float slideOffset) { 

      } 
     });