Recycle 通过OKHTTP请求数据ImageLoader请求图片

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依赖包：

compile 'com.android.support:mediarouter-v7:25.0.0'compile 'com.android.support:recyclerview-v7:25.0.0'compile 'com.squareup.okio:okio:1.5.0'compile 'com.squareup.okhttp3:okhttp:3.2.0'compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'compile 'com.google.code.gson:gson:2.8.2'compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'compile 'com.android.support:appcompat-v7:25.0.0'compile 'com.android.support:recyclerview-v7:25.0.0'

权限：

<uses-permission android:name="android.permission.INTERNET"></uses-permission><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>

将Utils中的类粘贴好将报错的Myapp删除掉通过提示再创建MyappMyapp中的代码：

public class MyApp extends Application {    public static MyApp mInstance;    @Override    public void onCreate() {        super.onCreate();        mInstance = this;        ImageLoaderConfiguration img=ImageLoaderConfiguration.createDefault(getApplicationContext());        ImageLoader.getInstance().init(img);    }    public static MyApp getInstance() {        return mInstance;    }}

RecycleView具体使用参考http://blog.csdn.net/lmj623565791/article/details/45059587；   本文出自:【张鸿洋的博客】MainActivity中：

public class MainActivity extends AppCompatActivity {    private RecyclerView mRecyclerView;    private ArrayList<User> mDatas;    private HomeAdapter mAdapter;    String mpath="http://api.tianapi.com/social/?key=71e58b5b2f930eaf1f937407acde08fe&num=40";    @Override    protected void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initData();        mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview);        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));        mRecyclerView.setItemAnimator(new DefaultItemAnimator());        mRecyclerView.addItemDecoration(new DividerItemDecoration(this,                DividerItemDecoration.VERTICAL_LIST));        mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL));    }    private void initData(){        OkHttp3Utils.getInstance().doGet(mpath, new GsonObjectCallback<MyNewsGons>() {            @Override            public void onUi(MyNewsGons myNewsGons) {                mDatas = new ArrayList<User>();                List<MyNewsGons.NewslistBean> newslist = myNewsGons.getNewslist();                for (MyNewsGons.NewslistBean mn:newslist) {                    mDatas.add(new User(mn.getTitle(),mn.getPicUrl()));                }                mRecyclerView.setAdapter(mAdapter = new HomeAdapter(mDatas,MainActivity.this));            }            @Override            public void onFailed(Call call, IOException e) {            }        });    }}HomeAdapter:

import android.content.Context;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.nostra13.universalimageloader.core.ImageLoader;import java.util.ArrayList;/** * Created by admin on 2017/10/12. */public class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.MyViewHolder>{    ArrayList<User> mDatas;    Context context;    public HomeAdapter(ArrayList<User> mDatas, Context context) {        this.mDatas = mDatas;        this.context = context;    }    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType)    {        MyViewHolder holder = new MyViewHolder(LayoutInflater.from(                context).inflate(R.layout.item_home, parent,                false));        return holder;    }    @Override    public int getItemCount()    {        return mDatas.size();    }    class MyViewHolder extends RecyclerView.ViewHolder    {        TextView tv;        ImageView img;        public MyViewHolder(View view)        {            super(view);            tv = (TextView) view.findViewById(R.id.id_num);            img= (ImageView) view.findViewById(R.id.img);        }    }    public interface OnItemClickLitener    {        void onItemClick(View view, int position);        void onItemLongClick(View view , int position);    }    private OnItemClickLitener mOnItemClickLitener;    public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener)    {        this.mOnItemClickLitener = mOnItemClickLitener;    }    @Override    public void onBindViewHolder(final MyViewHolder holder, final int position)    {        holder.tv.setText(mDatas.get(position).getTitle());        String url = mDatas.get(position).getUrl();        if (url.equals("")||url==null){            holder.img.setImageResource(R.mipmap.ic_launcher);        }else {            ImageLoader imgl = ImageLoader.getInstance();            imgl.displayImage(url, holder.img);        }        // 如果设置了回调，则设置点击事件        if (mOnItemClickLitener != null)        {            holder.itemView.setOnClickListener(new View.OnClickListener()            {                @Override                public void onClick(View v)                {                    int pos = holder.getLayoutPosition();                    mOnItemClickLitener.onItemClick(holder.itemView, pos);                }            });            holder.itemView.setOnLongClickListener(new View.OnLongClickListener()            {                @Override                public boolean onLongClick(View v)                {                    int pos = holder.getLayoutPosition();                    mOnItemClickLitener.onItemLongClick(holder.itemView, pos);                    return false;                }            });        }    }}DividerItemDecoration

import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Rect;import android.graphics.drawable.Drawable;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.util.Log;import android.view.View;public class DividerItemDecoration extends RecyclerView.ItemDecoration {    private static final int[] ATTRS = new int[]{            android.R.attr.listDivider    };    public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL;    public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL;    private Drawable mDivider;    private int mOrientation;    public DividerItemDecoration(Context context, int orientation) {        final TypedArray a = context.obtainStyledAttributes(ATTRS);        mDivider = a.getDrawable(0);        a.recycle();        setOrientation(orientation);    }    public void setOrientation(int orientation) {        if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) {            throw new IllegalArgumentException("invalid orientation");        }        mOrientation = orientation;    }    @Override    public void onDraw(Canvas c, RecyclerView parent) {        if (mOrientation == VERTICAL_LIST) {            drawVertical(c, parent);        } else {            drawHorizontal(c, parent);        }    }    public void drawVertical(Canvas c, RecyclerView parent) {        final int left = parent.getPaddingLeft();        final int right = parent.getWidth() - parent.getPaddingRight();        final int childCount = parent.getChildCount();        for (int i = 0; i < childCount; i++) {            final View child = parent.getChildAt(i);            android.support.v7.widget.RecyclerView v = new android.support.v7.widget.RecyclerView(parent.getContext());            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child                    .getLayoutParams();            final int top = child.getBottom() + params.bottomMargin;            final int bottom = top + mDivider.getIntrinsicHeight();            mDivider.setBounds(left, top, right, bottom);            mDivider.draw(c);        }    }    public void drawHorizontal(Canvas c, RecyclerView parent) {        final int top = parent.getPaddingTop();        final int bottom = parent.getHeight() - parent.getPaddingBottom();        final int childCount = parent.getChildCount();        for (int i = 0; i < childCount; i++) {            final View child = parent.getChildAt(i);            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child                    .getLayoutParams();            final int left = child.getRight() + params.rightMargin;            final int right = left + mDivider.getIntrinsicHeight();            mDivider.setBounds(left, top, right, bottom);            mDivider.draw(c);        }    }    @Override    public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {        if (mOrientation == VERTICAL_LIST) {            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());        } else {            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);        }    }}MyNewsGons这个是GsonFormat自己生成就好User

public class User {    private String title;    private String url;    public User(String title, String url) {        this.title = title;        this.url = url;    }    public String getTitle() {        return title;    }    public void setTitle(String title) {        this.title = title;    }    public String getUrl() {        return url;    }    public void setUrl(String url) {        this.url = url;    }}然后就是布局了activity布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <android.support.v7.widget.RecyclerView        android:id="@+id/id_recyclerview"        android:divider="#ffff0000"        android:dividerHeight="10dp"        android:layout_width="match_parent"        android:layout_height="match_parent" /></RelativeLayout>

item_home

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:background="#44ff0000"    android:layout_margin="20dp"    android:layout_height="wrap_content" >    <ImageView        android:id="@+id/img"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:id="@+id/id_num"        android:layout_below="@id/img"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center"        android:text="1" /></RelativeLayout>

 最后是MyappApp中修改

public class MyApp extends Application {    public static MyApp mInstance;    @Override    public void onCreate() {        super.onCreate();        mInstance = this;        ImageLoaderConfiguration img= ImageLoaderConfiguration.createDefault(getApplicationContext());        ImageLoader.getInstance().init(img);    }    public static MyApp getInstance() {        return mInstance;    }}再在清单文件中配好name就行了

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