BaseSubscriber.java

package com.zenglb.framework.rxhttp;

import android.content.Context;
import android.content.Intent;
import android.support.annotation.CallSuper;
import android.util.Log;
import android.widget.Toast;

import com.google.gson.Gson;
import com.jakewharton.retrofit2.adapter.rxjava2.HttpException;
import com.zenglb.baselib.utils.TextUtils;
import com.zenglb.framework.activity.access.LoginActivity;
import com.zenglb.framework.http.core.HttpResponse;
import com.zenglb.framework.http.core.HttpUiTips;
import org.reactivestreams.Subscription;
import java.io.IOException;
import java.net.ConnectException;
import java.net.SocketTimeoutException;
import java.net.UnknownHostException;
import java.net.UnknownServiceException;

import io.reactivex.subscribers.DisposableSubscriber;


/**
 * Base Observer 的封装处理,对Rxjava 不熟悉，暂时先这样吧。实际的使用还不是很明白
 *
 * 注意内存泄漏：https://github.com/trello/RxLifecycle/tree/2.x
 *
 * Created by zenglb on 2017/4/14.
 */
@Deprecated
public abstract class BaseSubscriber<T> extends DisposableSubscriber<HttpResponse<T>> {
    private final String TAG = BaseSubscriber.class.getSimpleName();
    private final int RESPONSE_CODE_OK = 0;      //自定义的业务逻辑，成功返回积极数据
    private final int RESPONSE_CODE_FAILED = -1; //返回数据失败,严重的错误

    private Context mContext;
    private static Gson gson = new Gson();

    private int errorCode;
    private String errorMsg = "未知的错误！";

    /**
     * 根据具体的Api 业务逻辑去重写 onSuccess 方法！Error 是选择重写，but 必须Super ！
     *
     * @param t
     */
    public abstract void onSuccess(T t);



    /**
     * @param mContext
     */
    public BaseSubscriber(Context mContext) {
        this.mContext = mContext;
        HttpUiTips.showDialog(mContext, true, null);
    }


    /**
     * @param mContext
     * @param showProgress 默认需要显示进程，不要的话请传 false
     */
    public BaseSubscriber(Context mContext, boolean showProgress) {
        this.mContext = mContext;
        if (showProgress) {
            HttpUiTips.showDialog(mContext, true, null);
        }
    }

//    @Override
//    public void onSubscribe(Subscription s) {
//        s.request(2);  //what is the hell ??????
//    }


    public BaseSubscriber() {
        super();
    }

    @Override
    protected void onStart() {
        super.onStart();
    }

    @Override
    public void onNext(HttpResponse<T> response) {
        Log.e(TAG, response.toString());
        HttpUiTips.dismissDialog(mContext);
        if (response.getCode() == RESPONSE_CODE_OK) {
            onSuccess(response.getResult());
        } else {
            Log.e(TAG, "这里有机会跑起来吗?");
            onFailure(response.getCode(), response.getError());
        }
    }

    @Override
    public  void onError(Throwable t) {
        HttpUiTips.dismissDialog(mContext);
        if (t instanceof HttpException) {
            HttpException httpException = (HttpException) t;
            errorCode = httpException.code();
            errorMsg = httpException.getMessage();
            getErrorMsg(httpException);
        } else if (t instanceof SocketTimeoutException) {  //VPN open
            errorCode = RESPONSE_CODE_FAILED;
            errorMsg = "服务器响应超时";
        } else if (t instanceof ConnectException) {
            errorCode = RESPONSE_CODE_FAILED;
            errorMsg = "网络连接异常，请检查网络";
        } else if (t instanceof RuntimeException) {
            errorCode = RESPONSE_CODE_FAILED;
            errorMsg = "运行时错误";
        } else if (t instanceof UnknownHostException) {
            errorCode = RESPONSE_CODE_FAILED;
            errorMsg = "无法解析主机，请检查网络连接";
        } else if (t instanceof UnknownServiceException) {
            errorCode = RESPONSE_CODE_FAILED;
            errorMsg = "未知的服务器错误";
        } else if (t instanceof IOException) {  //飞行模式等
            errorCode = RESPONSE_CODE_FAILED;
            errorMsg = "没有网络，请检查网络连接";
        }
        onFailure(errorCode, errorMsg);
    }

    /**
     * 简单的把Dialog 处理掉
     */
    @Override
    public void onComplete() {
//        HttpUiTips.dismissDialog(mContext);
    }


    /**
     * Default error dispose!
     * 一般的就是 AlertDialog 或 SnackBar
     *
     * @param code
     * @param message
     */
    @CallSuper  //if overwrite,you should let it run.
    public void onFailure(int code, String message) {
        if (code == RESPONSE_CODE_FAILED && mContext != null) {
            HttpUiTips.alertTip(mContext, message, code);
        } else {
            disposeEorCode(message, code);
        }
    }

    /**
     * 对通用问题的统一拦截处理
     *
     * @param code
     */
    private final void disposeEorCode(String message, int code) {
        switch (code) {
            case 101:
            case 112:
            case 123:
            case 401:
                //退回到登录页面
                Intent intent = new Intent();
                intent.setClass(mContext, LoginActivity.class);
                mContext.startActivity(intent);
                break;
        }
        Toast.makeText(mContext, message + "   code=" + code, Toast.LENGTH_SHORT).show();
    }


    /**
     * 获取详细的错误的信息 errorCode,errorMsg
     * <p>
     * 以登录的时候的Grant_type 故意写错为例子,这个时候的http 应该是直接的返回401=httpException.code()
     * 但是是怎么导致401的？我们的服务器会在respose.errorBody 中的content 中说明
     */
    private final void getErrorMsg(HttpException httpException) {
        String errorBodyStr = "";
        try {   //我们的项目需要的UniCode转码，不是必须要的！
            errorBodyStr = TextUtils.convertUnicode(httpException.response().errorBody().string());
        } catch (IOException ioe) {
            Log.e("errorBodyStr ioe:", ioe.toString());
        }
        try {
            HttpResponse errorResponse = gson.fromJson(errorBodyStr, HttpResponse.class);
            if (null != errorResponse) {
                errorCode = errorResponse.getCode();
                errorMsg = errorResponse.getError();
            } else {
                errorCode = RESPONSE_CODE_FAILED;
                errorMsg = "ErrorResponse is null";
            }
        } catch (Exception jsonException) {
            errorCode = RESPONSE_CODE_FAILED;
            errorMsg = "http请求错误Json 信息异常";
            jsonException.printStackTrace();
        }
    }

}