Retrofit+RxJava实现app崩溃处理（一）上传文件

这里主要讲一下当软件运行崩溃时，将错误日志保存到本地，然后上传到服务器
1.新建CrashHelper类实现Thread.UncaughtExceptionHandler的接口

public class CrashHandler implements Thread.UncaughtExceptionHandler {
    public static final String TAG = "CrashHandler";

    private String rootPath = Environment.getExternalStorageDirectory() + "/androidsolution/";


    //系统默认的UncaughtException处理类
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    //CrashHandler实例
    private static CrashHandler instance;
    //程序的Context对象
    private Context mContext;
    //用来存储设备信息和异常信息
    private Map infos = new HashMap();

    //用于格式化日期,作为日志文件名的一部分
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

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

    /**
     * 获取CrashHandler实例 ,单例模式
     */
    public static CrashHandler getInstance() {
        if (instance == null)
            instance = new CrashHandler();
        return instance;
    }

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

    /**
     * 当UncaughtException发生时会转入该函数来处理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            //如果用户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(2000);
            } catch (InterruptedException e) {
                Log.e(TAG, "error : ", e);
            }
            //退出程序
            Intent intent = new Intent(mContext, FirstActivity.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            mContext.startActivity(intent);
            android.os.Process.killProcess(android.os.Process.myPid());  //结束进程之前可以把你程序的注销或者退出代码放在这段代码之前
        }
    }

    /**
     * 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
     * @return true:如果处理了该异常信息;否则返回false.
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }
        //收集设备参数信息
        collectDeviceInfo(mContext);

        //使用Toast来显示异常信息
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.", Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        }.start();
        //保存日志文件
        saveCatchInfo2File(ex);
        return true;
    }

    /**
     * 收集设备参数信息
     *
     * @param ctx
     */
    public void collectDeviceInfo(Context ctx) {
        try {
            PackageManager pm = ctx.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                String versionName = pi.versionName == null ? "null" : pi.versionName;
                String versionCode = pi.versionCode + "";
                infos.put("versionName", versionName);
                infos.put("versionCode", versionCode);
            }
        } catch (PackageManager.NameNotFoundException e) {
            Log.e(TAG, "an error occured when collect package info", e);
        }
        infos.put("mac", DeviceUtils.getMacAddress(ctx));
        infos.put("date", formatter.format(new Date()));
        Field[] fields = Build.class.getDeclaredFields();
        for (Field field : fields) {
            try {
                field.setAccessible(true);
                infos.put(field.getName(), field.get(null).toString());
                Log.d(TAG, field.getName() + " : " + field.get(null));
            } catch (Exception e) {
                Log.e(TAG, "an error occured when collect crash info", e);
            }
        }
    }

    /**
     * 保存错误信息到文件中
     *
     * @param ex
     * @return 返回文件名称, 便于将文件传送到服务器
     */
    private String saveCatchInfo2File(Throwable ex) {

        StringBuffer sb = new StringBuffer();
        for (Map.Entry entry : infos.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            sb.append(key + "=" + value + "\n");
        }

        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();
        String result = writer.toString();
        sb.append(result);
        try {
            String fileName = "crash.txt";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                File dir = new File(rootPath);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(rootPath + fileName);
                fos.write(sb.toString().getBytes());
                //发送给开发人员
                sendCrashLog2PM(rootPath + fileName);
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing file...", e);
        }
        return null;
    }

    /**
     * 将捕获的导致崩溃的错误信息发送给开发人员
     * 

     * 目前只将log日志保存在sdcard 和输出到LogCat中，并未发送给后台。
     */
    private void sendCrashLog2PM(String fileName) {
        if (!new File(fileName).exists()) {
            Toast.makeText(mContext, "日志文件不存在！", Toast.LENGTH_SHORT).show();
            return;
        }
        FileInputStream fis = null;
        BufferedReader reader = null;
        String s = null;
        try {
            fis = new FileInputStream(fileName);
            reader = new BufferedReader(new InputStreamReader(fis, "utf-8"));
            while (true) {
                s = reader.readLine();
                if (s == null) break;
                //由于目前尚未确定以何种方式发送，所以先打出log日志。
                Log.e("tag", s.toString());
                if (NetworkUtils.isConnected(mContext)) {
                    Intent intent = new Intent(mContext, MyService.class);
                    mContext.startService(intent);
                } else {
                    ToastUtils.showLongToastSafe(mContext, "因网络问题，错误信息暂未上传");
                }

            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {   // 关闭流
            try {
                reader.close();
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }


}

注释:这里我将错误日志保存到sd卡下的androidsolution文件夹中，名字是crash.txt。我是通过service实现上传文件功能，具体service的使用这里就不详细说明了。
2.新建一个服务类MyService继承service

package com.user.androidsolution.service;

import android.app.Service;
import android.content.Intent;
import android.os.Environment;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.support.annotation.Nullable;
import android.util.Log;

import com.user.androidsolution.bean.UploadBean;
import com.user.androidsolution.helper.HandlerHelper;
import com.user.androidsolution.helper.HttpHelper;
import com.user.androidsolution.utils.ToastUtils;

import java.io.File;

import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.RequestBody;
import rx.Observable;
import rx.Subscriber;

/**
 * Created by User on 2017/4/18.
 */

public class MyService extends Service {
    private static final int SERVICE1 = 0;

    private String rootPath = Environment.getExternalStorageDirectory() + "/androidsolution/";

    private Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what == SERVICE1) {
                UploadBean bean = (UploadBean) msg.obj;
                if (bean.getStats().equals("success")) {
                    ToastUtils.showShortToastSafe(getApplicationContext(), "错误信息已上传到服务器");
                    stopSelf();
                } else {
                    ToastUtils.showShortToastSafe(getApplicationContext(), "错误日志上传出错");
                    stopSelf();
                }
            }
        }
    };

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        upload();
    }

    private void upload() {
        Subscriber subscriber = new Subscriber() {
            @Override
            public void onCompleted() {
                Log.e("tag", "completed");

            }

            @Override
            public void onError(Throwable e) {
                Log.e("tag", "error--" + e.getMessage());

            }

            @Override
            public void onNext(UploadBean uploadBean) {
                HandlerHelper.sendMessage(handler, uploadBean, SERVICE1);

            }
        };

        HttpHelper httpHelper = new HttpHelper(HttpHelper.URL_UPLOAD);
        Observable observable = httpHelper.upload(getParams());
        httpHelper.toSubscriber(observable, subscriber);
    }

    private RequestBody getParams() {
        File file = new File(rootPath + "crash.txt");
        //构建body
        RequestBody requestBody = new MultipartBody.Builder().setType(MultipartBody.FORM)
                .addFormDataPart("action", "fileUpload")
                .addFormDataPart("file", file.getName(), RequestBody.create(MediaType.parse("multipart/form-data"), file))
                .build();
        Log.e("tag", file.getAbsolutePath());
        return requestBody;
    }


}

注释：这里我用的retrofit的简单封装，又不懂的可以看我之前发布的博客，这里就不细说了。
其实上传文件和普通的请求没什么区别，主要就是上传时候的参数必须是RequestBody

具体的一下参数可以在getParams（）中配置，我这里是一个传递了一个string的类型和一个文件

荆轲刺秦王！