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<String, String> infos = new HashMap<String, String>();    //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<String, String> 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     * <p>     * 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<UploadBean> subscriber = new Subscriber<UploadBean>() {            @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<UploadBean> 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！