Android程序闪退时写日志并上传到服务器

package com.cquni.app;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

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

import com.cquni.dto.WebApiResultMessage;
import com.cquni.utils.JSONHttpClient;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;

/**
 * UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告.
 *
 * @author user
 *
 */
public class CrashHandler implements UncaughtExceptionHandler {

    public static final String TAG = "CrashHandler";

    // 系统默认的UncaughtException处理类
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    // CrashHandler实例
    private static CrashHandler INSTANCE = new CrashHandler();
    // 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() {
        return INSTANCE;
    }

    /**
     * 初始化
     *
     * @param context
     */
    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(3000);
            } catch (InterruptedException e) {
                Log.e(TAG, "error : ", e);
            }
            finally {
                // 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
     * @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);
        // 保存日志文件
        saveCrashInfo2File(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 (NameNotFoundException e) {
            Log.e(TAG, "an error occured when collect package info", e);
        }
        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 saveCrashInfo2File(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 {
            long timestamp = System.currentTimeMillis();
            String time = formatter.format(new Date());
            String fileName = "crash-" + time + "-" + timestamp + ".log";
            String path = Environment.getExternalStorageDirectory()+"/wcs_log";
            File dir = new File(path);
            if (!dir.exists()) {
                dir.mkdirs();
            }
            FileOutputStream fos = new FileOutputStream(path +"/"+ fileName);
            fos.write(sb.toString().getBytes());
            fos.flush();
            fos.close();
            return fileName;
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing file...", e);
        }
        //上传到服务器
        new PostErrorLoggerTask().execute(sb.toString());
        return null;
    }

    /**
     * 提交错误日志到服务器
     */
    class PostErrorLoggerTask extends AsyncTask<String, Integer, WebApiResultMessage> {

        @Override
        protected WebApiResultMessage doInBackground(String... messageText) {
            WebApiResultMessage rs = new WebApiResultMessage();
            rs.setMessage("");
            rs.setResult(null);
            rs.setSuccess(false);
            JSONHttpClient jsonHttpClient = new JSONHttpClient();
            List<NameValuePair> params = new ArrayList();
            params.add(new BasicNameValuePair("errorMessage", messageText[0]));
            params.add(new BasicNameValuePair("logType", "Error"));
            String url = "http://192.168.122.5:5990/SmartWCS/UpLoadPDA_Logger";
            try {
                return jsonHttpClient.PostJsonObject(url, "{}", params);
            } catch (Exception e) {
                e.printStackTrace();
                rs.setMessage(e.getMessage());
            }
            return rs;
        }
    }
}

 服务器端（.net webapi）

/// <summary>
        /// PDA上传错误日志
        /// </summary>
        /// <param name="errorMessage"></param>
        /// <param name="logType"></param>
        /// <returns></returns>
        [HttpGet]
        [HttpPost]
        public ApiActionResult UpLoadPDA_Logger(string errorMessage,string logType)
        {
            var result = new ApiActionResult
            {
                Message = "操作失败！",
                Result = null,
                Success = false
            };
            if (!string.IsNullOrEmpty(errorMessage))
            {
                StringBuilder sb = new StringBuilder();
                string path = AppDomain.CurrentDomain.BaseDirectory + "Log\\";
                string filename = $"pda_Logs_{DateTime.Now.ToString("yyyyMMdd")}.txt";
                if (File.Exists(path + filename))
                {
                    StreamReader sr = new StreamReader(path + filename, Encoding.Default);
                    try
                    {                        
                        string content;
                        while ((content = sr.ReadLine()) != null)
                        {
                            sb.AppendLine(content);
                        }
                    }
                    catch (Exception)
                    {

                        throw;
                    }
                    finally
                    {
                        sr.Close();
                        Thread.Sleep(100);
                    }                    
                }
                sb.AppendLine(string.Format("{0}->: "+logType+" : ", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff")) +errorMessage);
                using (FileStream fs = new FileStream(path + filename, FileMode.OpenOrCreate))
                {
                    var buffer = Encoding.Default.GetBytes(sb.ToString());
                    fs.Write(buffer,0,buffer.Length);
                    fs.Flush();
                    fs.Close();
                    result.Success = true;
                    result.Result = sb.ToString();
                    result.Message = "操作成功！";
                }
            }
            return result;
        }