Android Studio中recycleview不工作

我从recycleview显示详细类中的任何问题的细节， recycleview是表演，但没有详细功能，我不明白如何使点击与回收视图位置，Android Studio中recycleview不工作

这是我的ListBerita.java


 
     
 
     stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() { 
 
      @Override 
 
      public void onResponse(String response) { 
 
       Log.d("response ", response); 
 
       try { 
 
        JSONObject jsonObject = new JSONObject(response); 
 
        JSONArray jsonArray = jsonObject.getJSONArray("berita"); 
 
        for (int a = 0; a < jsonArray.length(); a++) { 
 
         JSONObject json = jsonArray.getJSONObject(a); 
 
         HashMap<String, String> map = new HashMap<String, String>(); 
 
         map.put("id_berita", json.getString("id_berita")); 
 
         map.put("id_pos", json.getString("id_pos")); 
 
         map.put("nama_pos", json.getString("nama_pos")); 
 
         map.put("gambar_berita", json.getString("gambar_berita")); 
 
         map.put("berita", json.getString("berita")); 
 
         list_data.add(map); 
 
         AdapterList adapter = new AdapterList(ListBerita.this, list_data); 
 
         beritalist.setAdapter(adapter); 
 

 

 
        } 
 
       } catch (JSONException e) { 
 
        e.printStackTrace(); 
 
       } 
 

 
      } 
 

 

 

 
<!-- begin snippet: js hide: false console: true babel: false -->

  @Override 
      public void onErrorResponse(VolleyError error) { 
       Toast.makeText(ListBerita.this, error.getMessage(), Toast.LENGTH_SHORT).show(); 
      } 
     }); 

     requestQueue.add(stringRequest); 
    } 

}

这是我的适配器

package baru.azoel.ayomuncak.Adapter; 
 

 
import android.content.Context; 
 
import android.content.Intent; 
 
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 com.bumptech.glide.Glide; 
 

 
import java.util.ArrayList; 
 
import java.util.HashMap; 
 

 
import baru.azoel.ayomuncak.DetailBerita; 
 
import baru.azoel.ayomuncak.ListBerita; 
 
import baru.azoel.ayomuncak.R; 
 

 
/** 
 
* Created by azoel. 
 
*/ 
 
public class AdapterList extends RecyclerView.Adapter<AdapterList.ViewHolder>{ 
 

 
    Context context; 
 
    ArrayList<HashMap<String, String>> list_data; 
 

 
    public AdapterList(ListBerita beritaActivity, ArrayList<HashMap<String, String>> list_data) { 
 
     this.context = beritaActivity; 
 
     this.list_data = list_data; 
 

 
    } 
 

 
    @Override 
 
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
 
     View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_berita, null); 
 
     return new ViewHolder(view); 
 
    } 
 

 
    @Override 
 
    public void onBindViewHolder(ViewHolder holder, int position) { 
 
     Glide.with(context) 
 
       .load("http://marimuncak.000webhostapp.com/images/" + list_data.get(position).get("gambar_berita")) 
 
       .crossFade() 
 
       .placeholder(R.mipmap.ic_launcher) 
 
       .into(holder.imgberita); 
 
     holder.txtnama.setText(list_data.get(position).get("nama_pos")); 
 
     holder.txtberita.setText(list_data.get(position).get("berita")); 
 

 
     
 
    } 
 

 

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

 
    public class ViewHolder extends RecyclerView.ViewHolder { 
 
     TextView txtberita; 
 
     ImageView imgberita; 
 
     TextView txtnama; 
 
     public ViewHolder(View itemView) { 
 
      super(itemView); 
 
      txtnama = (TextView) itemView.findViewById(R.id.txtnama); 
 
      txtberita = (TextView) itemView.findViewById(R.id.txtberita); 
 
      imgberita = (ImageView) itemView.findViewById(R.id.imgberita); 
 
     } 
 
    } 
 

 
}

来源

2017-08-15 Azzul Arivin

你想处理事件点击在Recyclerview中定位项目？ –

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

Context context; 
ArrayList<HashMap<String, String>> list_data; 

public AdapterList(ListBerita beritaActivity, ArrayList<HashMap<String, String>> list_data) { 
    this.context = beritaActivity; 
    this.list_data = list_data; 

} 

@Override 
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_berita, null); 
    return new ViewHolder(view); 
} 

@Override 
public void onBindViewHolder(ViewHolder holder, int position) { 
    Glide.with(context) 
      .load("http://marimuncak.000webhostapp.com/images/" + list_data.get(position).get("gambar_berita")) 
      .crossFade() 
      .placeholder(R.mipmap.ic_launcher) 
      .into(holder.imgberita); 
    holder.txtnama.setText(list_data.get(position).get("nama_pos")); 
    holder.txtberita.setText(list_data.get(position).get("berita")); 
    holder.itemView.setOnClickListener(new View.onClickListener() { 
    @Override 
    public void onClick(View v) { 
    onItemClickListener.onItemClick(position); 
    } 
}); 

} 


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

public class ViewHolder extends RecyclerView.ViewHolder { 
    TextView txtberita; 
    ImageView imgberita; 
    TextView txtnama; 
    public ViewHolder(View itemView) { 
     super(itemView); 
     txtnama = (TextView) itemView.findViewById(R.id.txtnama); 
     txtberita = (TextView) itemView.findViewById(R.id.txtberita); 
     imgberita = (ImageView) itemView.findViewById(R.id.imgberita); 
    } 
} 

    public void setOnItemClickListener(OnItemClickListener onItemClickListener){ 
    this.onItemClickListener = onItemClickListener; 
} 

OnItemClickListener onItemClickListener; 

    public interface OnItemClickListener{ 
    void onItemClick(int position); 
} 
}

您的活动。在Oncreate（）

public class TestActivity extends AppCompatActivity implements AdapterList.OnItemClickListener { 



@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_test); 
    your_adapter.setOnItemClickListener(this); 
} 

    @Override 
public void onItemClick(int position) { 
    // code here 
} 
}

来源

2017-08-15 03:38:15

你有一个链接，我可以学习有关recycleview和详细类与MySQL？ –

你可以参考：https://www.androidhive.info/2012/05/how-to-connect-android-with-php-mysql/ –

在你onBindViewHolder方法添加点击监听器为您itemView

@Override 
public void onBindViewHolder(ViewHolder holder, int position) { 
    Glide.with(context) 
      .load("http://marimuncak.000webhostapp.com/images/" + list_data.get(position).get("gambar_berita")) 
      .crossFade() 
      .placeholder(R.mipmap.ic_launcher) 
      .into(holder.imgberita); 
    holder.txtnama.setText(list_data.get(position).get("nama_pos")); 
    holder.txtberita.setText(list_data.get(position).get("berita")); 

    holder.itemView.setOnClickListener(new View.onClickListener() { 
     @Override 
     public void onClick(View v) { 
      //Do something here with position 
     } 
    }); 

}

如果你想添加的项目点击您的活动/片段类而不是适配器类，有多种方法可以实现它。其中之一写在下面。

创建一个类ItemClickSupport

ItemClickSupport.java

public class ItemClickSupport { 
private final RecyclerView mRecyclerView; 
private OnItemClickListener mOnItemClickListener; 
private OnItemLongClickListener mOnItemLongClickListener; 
private View.OnClickListener mOnClickListener = new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     if (mOnItemClickListener != null) { 
      RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v); 
      mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v); 
     } 
    } 
}; 
private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() { 
    @Override 
    public boolean onLongClick(View v) { 
     if (mOnItemLongClickListener != null) { 
      RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v); 
      return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v); 
     } 
     return false; 
    } 
}; 
private RecyclerView.OnChildAttachStateChangeListener mAttachListener 
     = new RecyclerView.OnChildAttachStateChangeListener() { 
    @Override 
    public void onChildViewAttachedToWindow(View view) { 
     if (mOnItemClickListener != null) { 
      view.setOnClickListener(mOnClickListener); 
     } 
     if (mOnItemLongClickListener != null) { 
      view.setOnLongClickListener(mOnLongClickListener); 
     } 
    } 

    @Override 
    public void onChildViewDetachedFromWindow(View view) { 

    } 
}; 

private ItemClickSupport(RecyclerView recyclerView) { 
    mRecyclerView = recyclerView; 
    mRecyclerView.setTag(R.id.item_click_support, this); 
    mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener); 
} 

public static ItemClickSupport addTo(RecyclerView view) { 
    ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support); 
    if (support == null) { 
     support = new ItemClickSupport(view); 
    } 
    return support; 
} 

public static ItemClickSupport removeFrom(RecyclerView view) { 
    ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support); 
    if (support != null) { 
     support.detach(view); 
    } 
    return support; 
} 

public ItemClickSupport setOnItemClickListener(OnItemClickListener listener) { 
    mOnItemClickListener = listener; 
    return this; 
} 

public ItemClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) { 
    mOnItemLongClickListener = listener; 
    return this; 
} 

private void detach(RecyclerView view) { 
    view.removeOnChildAttachStateChangeListener(mAttachListener); 
    view.setTag(R.id.item_click_support, null); 
} 

public interface OnItemClickListener { 

    void onItemClicked(RecyclerView recyclerView, int position, View v); 
} 

public interface OnItemLongClickListener { 

    boolean onItemLongClicked(RecyclerView recyclerView, int position, View v); 
} 
}

的，你可以使用这个类的所有recyclerViews像下面

ItemClickSupport.addTo(recyclerView).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() { 
     @Override 
     public void onItemClicked(RecyclerView recyclerView, int position, View v) { 
      //Do something here with position 
     } 
    });

你甚至可以覆盖onItemLongClicked如果你有差异不同导航的手势

来源

2017-08-15 03:30:47

你有一个链接，我可以学习有关MySQL的recycleview和详细类吗？ –

Android Studio中recycleview不工作

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