如何将Android应用崩溃时自动记录日志并上传至服务器？
摘要：package com.cquni.app; import java.io.File; import java.io.FileOutputStream; import java.io.PrintWriter; import java.io.
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;
}