RecyclerView的基本使用

1 <android.support.v7.widget.RecyclerView 2 android:id="@+id/recycleview" 3 android:paddingLeft="10dp" 4 android:paddingRight="10dp" 5 android:layout_width="match_parent" 6 android:layout_height="match_parent" 7 android:gravity="center"> 8 </android.support.v7.widget.RecyclerView>

1 recyclerView = (RecyclerView)findViewById(R.id.recycleview); 2 recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 4)) ; //gridView网格布局 3 recyclerView.setLayoutManager(new LinearLayoutManager(this)); //listView线性布局

 1 package com.yiba.files.adapter;  2  3 import android.content.Context;  4 import android.graphics.drawable.BitmapDrawable;  5 import android.support.v7.widget.RecyclerView;  6 import android.view.LayoutInflater;  7 import android.view.View;  8 import android.view.ViewGroup;  9 import android.widget.ImageView;  10 import android.widget.RelativeLayout;  11 import android.widget.TextView;  12  13 import com.yiba.files.R;  14 import com.yiba.files.model.DataItem;  15 import com.yiba.files.util.DensityUtils;  16 import com.yiba.files.util.DeviceUtils;  17  18 import java.util.List;  19  20 /**  21  * Created by ${zyj} on 2016/1/23.  22 */  23 public class AppAdapter extends RecyclerView.Adapter<AppAdapter.MyViewHolder> {  24 private Context context;  25 private List<DataItem> list;  26 private RelativeLayout.LayoutParams params;  27  28 public interface OnItemClickListener {  29 void onItemClick(View view, int position);  30  }  31  32 private OnItemClickListener onItemClickListener;  33  34 public void setOnItemClickListener(OnItemClickListener listener) {  35 onItemClickListener = listener;  36  }  37  38 public AppAdapter(Context context, List<DataItem> list) {  39 this.context = context;  40 this.list = list;  41  }  42  43  @Override  44 public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {  45 MyViewHolder holder = new MyViewHolder(LayoutInflater.from(context).inflate(  46 R.layout.fragment_app_item, null));  47 return holder;  48  }  49  50  @Override  51 public void onBindViewHolder(final MyViewHolder holder,  52 final int position) {  53 DataItem info = list.get(position);  54 String tag = (String) holder.imageView.getTag();  55  56 if (!info.getName().equals(tag)) {  57  holder.imageView.setImageBitmap(((BitmapDrawable) list.get(position)  58  .getImage()).getBitmap());  59  holder.imageView.setTag(info.getName());  60  }  61  62 if (info.isSelect()) {  63 holder.imageView.setAlpha(0.3f);  64 holder.appName.setAlpha(0.3f);  65 holder.appSize.setAlpha(0.3f);  66  holder.app_choice.setVisibility(View.VISIBLE);  67 } else {  68 holder.imageView.setAlpha(1.0f);  69 holder.appName.setAlpha(1.0f);  70 holder.appSize.setAlpha(1.0f);  71  holder.app_choice.setVisibility(View.GONE);  72  }  73  74  holder.appName.setText(info.getDisplayName());  75 holder.appSize.setText("" + DeviceUtils.convertByte(info.getSize()));  76  77 holder.itemView.setOnClickListener(new View.OnClickListener() {  78  @Override  79 public void onClick(View v) {  80 if (onItemClickListener != null) {  81 int pos = holder.getLayoutPosition();  82  onItemClickListener.onItemClick(holder.itemView, pos);  83  }  84  }  85  });  86  }  87  88  @Override  89 public int getItemCount() {  90 if (list != null) {  91 return list.size();  92 } else {  93 return 0;  94  }  95  }  96  97 public DataItem getItem(int position) {  98 return list.get(position);  99  } 100 101 class MyViewHolder extends RecyclerView.ViewHolder { 102  ImageView imageView; 103  ImageView app_choice; 104  TextView appName; 105  TextView appSize; 106 107 public MyViewHolder(View view) { 108 super(view); 109 imageView = (ImageView) view.findViewById(R.id.appImage); 110 111 params = (RelativeLayout.LayoutParams) imageView.getLayoutParams(); 112 params.width = DensityUtils.getScreenWidth(context) / 6; 113 params.height = params.width; 114  imageView.setLayoutParams(params); 115 116 appName = (TextView) view.findViewById(R.id.appName); 117 appSize = (TextView) view.findViewById(R.id.appSize); 118 app_choice = (ImageView) view.findViewById(R.id.appSelect_image); 119  } 120  } 121 }