Okhttp解析Gson数据并且展示到recyclerView

1、这篇文章主要应用的是Okhttp请求网络数据解析Gson，判断网络，没有网络跳转到设置界面，然后通过XRecyclerView展示到页面中。并且可以实现全局捕获异常，加载图片实现属性动画渐变的效果。

2、导入依赖

compile "com.squareup.okhttp:okhttp:2.4.0"
compile "io.github.openfeign:feign-gson:9.5.1"
compile "com.github.bumptech.glide:glide:3.8.0"
compile "com.jcodecraeer:xrecyclerview:1.3.2"

这四个依赖分别是okhttp的依赖、Gson的依赖、图片加载Glide的依赖、XrecyclerView的依赖

3、配置权限

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

这两个权限分别是编写的权限跟联网的权限

4、MainActivity中的布局，只需要布一个XrecyclerView的布局就可以了

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <com.jcodecraeer.xrecyclerview.XRecyclerView
        android:id="@+id/recycler"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
         ></com.jcodecraeer.xrecyclerview.XRecyclerView>

</RelativeLayout>

5、MainActicity中的数据

import android.animation.ObjectAnimator;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.bumptech.glide.Glide;
import com.google.gson.Gson;
import com.jcodecraeer.xrecyclerview.XRecyclerView;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;

import java.io.IOException;
import java.util.List;


public class MainActivity extends AppCompatActivity {
    private List<Bean.DataBean> list;
    private XRecyclerView recycler;
    private String URL = "http://www.yulin520.com/a2a/impressApi/news/mergeList?sign=C7548DE604BCB8A17592EFB9006F9265&pageSize=20&gender=2&ts=1871746850&page=";
    private int page = 1;//设置首先展示的页面是第一页
    private Handler handler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            String u = (String) msg.obj;
            Gson gson = new Gson();
            Bean bean = gson.fromJson(u, Bean.class);
           list = bean.getData();
            //设置布局管理器
            recycler.setLayoutManager(new LinearLayoutManager(MainActivity.this));
            //设置适配器
            recycler.setAdapter(new MyAdapter());
            //分页加的
            recycler.setLoadingListener(new XRecyclerView.LoadingListener() {
                @Override
                //下拉刷新
                public void onRefresh() {
                    page = 1;
                    list.clear();
                    jiexi();
                    recycler.refreshComplete();
                }

                @Override
                //上拉加载
                public void onLoadMore() {
                    page++;
                    jiexi();
                    Toast.makeText(MainActivity.this, "加载更多", Toast.LENGTH_LONG).show();
                    recycler.loadMoreComplete();
                }
            });

        }
    };


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //判断网络
        checkNetwork();
        //找控件
        initData();
        //解析数据
        jiexi();

        if (!checkNetwork()) {
            Toast.makeText(this, "没有网络", Toast.LENGTH_LONG).show();
            Intent intent = new Intent("android.settings.WIRELESS_SETTINGS");
            startActivity(intent);
            return;
        }
    }

    private void jiexi() {

        OkHttpClient okHttpClient = new OkHttpClient();
        Request request = new Request.Builder()
                .url(URL)
                .build();
        okHttpClient.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Request request, IOException e) {

            }

            @Override
            public void onResponse(Response response) throws IOException {
                String string = response.body().string();
                Log.i("aaa", "run: " + string);
                Message message = new Message();
                message.obj = string;
                handler.sendMessage(message);
            }
        });
    }
    //找到控件
    private void initData() {
        recycler = (XRecyclerView) findViewById(R.id.recycler);
    }

    private boolean checkNetwork() {
        ConnectivityManager conn = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo net = conn.getActiveNetworkInfo();
        if (net != null && net.isConnected()) {
            return true;
        }
        return false;
    }

    class MyAdapter extends XRecyclerView.Adapter<MyAdapter.MyViewHolder> {

        @Override
        //绑定布局
        public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false);
            MyViewHolder viewHolder = new MyViewHolder(view);
            return viewHolder;
        }

        @Override
        public void onBindViewHolder(MyViewHolder holder, int position) {
            holder.name.setText(list.get(position).getTitle());
            // holder.old.setText(list.get(position).getUserAge());

            Glide.with(MainActivity.this).load(list.get(position).getImg()).into(holder.image);

            holder.desc.setText(list.get(position).getIntroduction());
            holder.job.setText(list.get(position).getOccupation());
            //添加属性动画，实现渐变效果。
            ObjectAnimator//
                    .ofFloat(holder.image, "alpha",0.0F,1f)//
                    .setDuration(2000)//
                    .start();
        }

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

        class MyViewHolder extends XRecyclerView.ViewHolder {

            public TextView name;
            public TextView old;
            public TextView desc;
            public ImageView image;
            public TextView job;

            public MyViewHolder(View itemView) {
                super(itemView);
                name = itemView.findViewById(R.id.name);
                old = itemView.findViewById(R.id.old);
                desc = itemView.findViewById(R.id.desc);
                image = itemView.findViewById(R.id.image);
                job = itemView.findViewById(R.id.job);
            }
        }
    }
}

6、借助Formate建立一个Bean类

7、全局异常的获取类。记得要在Application中申明这个类

android:name=".MainApplication"

粘贴两个包进去。

7.1

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class CrashHandler implements Thread.UncaughtExceptionHandler {
    private static final String TAG = "CrashHandler";
    private Thread.UncaughtExceptionHandler mDefaultHandler;// 系统默认的UncaughtException处理类
    private static CrashHandler INSTANCE = new CrashHandler();// CrashHandler实例
    private Context mContext;// 程序的Context对象
    private Map<String, String> info = new HashMap<String, String>();// 用来存储设备信息和异常信息
    private SimpleDateFormat format = new SimpleDateFormat(
            "yyyy-MM-dd-HH-mm-ss");// 用于格式化日期,作为日志文件名的一部分

    /**
     * 保证只有一个CrashHandler实例
     */
    private CrashHandler() {

    }

    /**
     * 获取CrashHandler实例 ,单例模式
     */
    public static CrashHandler getInstance() {
        return INSTANCE;
    }

    /**
     * 初始化
     *
     * @param context
     */
    public void init(Context context) {
        mContext = context;
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();// 获取系统默认的UncaughtException处理器
        Thread.setDefaultUncaughtExceptionHandler(this);// 设置该CrashHandler为程序的默认处理器
    }

    /**
     * 当UncaughtException发生时会转入该重写的方法来处理
     */
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            // 如果自定义的没有处理则让系统默认的异常处理器来处理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            try {
                Thread.sleep(3000);// 如果处理了，让程序继续运行3秒再退出，保证文件保存并上传到服务器
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            // 退出程序
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);
        }
    }

    /**
     * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.
     *
     * @param ex 异常信息
     * @return true 如果处理了该异常信息;否则返回false.
     */
    public boolean handleException(Throwable ex) {
        if (ex == null)
            return false;
        new Thread() {
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "出现闪退了正在把日志保存到sdcard crash目录下", Toast.LENGTH_LONG).show();
                Looper.loop();
            }
        }.start();
        // 收集设备参数信息
        collectDeviceInfo(mContext);
        // 保存日志文件
        saveCrashInfo2File(ex);
        return true;
    }

    /**
     * 收集设备参数信息
     *
     * @param context
     */
    public void collectDeviceInfo(Context context) {
        try {
            PackageManager pm = context.getPackageManager();// 获得包管理器
            PackageInfo pi = pm.getPackageInfo(context.getPackageName(),
                    PackageManager.GET_ACTIVITIES);// 得到该应用的信息，即主Activity
            if (pi != null) {
                String versionName = pi.versionName == null ? "null"
                        : pi.versionName;
                String versionCode = pi.versionCode + "";
                info.put("versionName", versionName);
                info.put("versionCode", versionCode);
            }
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }

        Field[] fields = Build.class.getDeclaredFields();// 反射机制
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                info.put(field.getName(), field.get("").toString());
                Log.d(TAG, field.getName() + ":" + field.get(""));
            } catch (IllegalArgumentException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }

    private String saveCrashInfo2File(Throwable ex) {
        StringBuffer sb = new StringBuffer();
        for (Map.Entry<String, String> entry : info.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value + "
");
        }
        Writer writer = new StringWriter();
        PrintWriter pw = new PrintWriter(writer);
        ex.printStackTrace(pw);
        Throwable cause = ex.getCause();
        // 循环着把所有的异常信息写入writer中
        while (cause != null) {
            cause.printStackTrace(pw);
            cause = cause.getCause();
        }
        pw.close();// 记得关闭
        String result = writer.toString();
        sb.append(result);
        Log.d("zzz", "错误日志key：" + result);
        // 保存文件
        long timetamp = System.currentTimeMillis();
        String time = format.format(new Date());
        String fileName = "crash-" + time + "-" + timetamp + ".log";
        if (Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED)) {
            try {
                File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "crash");
                Log.i("CrashHandler", dir.toString());
                if (!dir.exists())
                    dir.mkdir();
                FileOutputStream fos = new FileOutputStream(new File(dir, fileName));
                fos.write(sb.toString().getBytes());
                fos.close();
                return fileName;
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }
}

7.2

import android.app.Application;

public class MainApplication extends Application {

   @Override
    public void onCreate() {
      super.onCreate();
      CrashHandler crashHandler = CrashHandler.getInstance();
        crashHandler.init(this);
   }
   
}

8、item的布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/image"
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:layout_weight="1"
        />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <TextView
            android:id="@+id/name"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="秦心"
            android:textSize="20sp"
            android:textColor="#D1AA47"
            android:padding="10dp"
            />
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="已实名认证"
            />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <TextView
            android:id="@+id/old"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="26岁"
            android:textSize="20sp"
            android:layout_marginLeft="20dp"
            android:background="#94D3D6"
            />
        <TextView
            android:id="@+id/job"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="银行"
            android:textSize="20sp"
            android:background="#EFBE42"
            android:layout_marginLeft="10dp"
            />

    </LinearLayout>
    <TextView
        android:id="@+id/desc"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="90年/天蝎座"
        android:textSize="18sp"
        android:layout_marginTop="10sp"
        android:layout_marginLeft="15dp"
        />

</LinearLayout>

上面就是