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！