android 异常打印

package com.lbstock;  import java.io.File;  import java.io.FileNotFoundException;  import java.io.FileOutputStream;  import java.io.IOException;  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.SimpleDateFormat;  import java.util.Date;  import java.util.HashMap;  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.Build;  import android.os.Environment;  import android.os.Looper;  import android.util.Log;  import android.widget.Toast;    /**  * UncaughtException处理类,当程序发生Uncaught异常的时候,由该类来接管程序,并记录发送错误报告. * @author way */  public class CrashHandler implements UncaughtExceptionHandler {      private static final String TAG = "CrashHandler";      private Thread.UncaughtExceptionHandler mDefaultHandler;// 系统默认的UncaughtException处理类      private static CrashHandler INSTANCE = new CrashHandler();// CrashHandler实例      private Context mContext;// 程序的Context对象      private Map<String, String> info = new HashMap<String, String>();// 用来存储设备信息和异常信息      private SimpleDateFormat format = new SimpleDateFormat(              "yyyy-MM-dd-HH-mm-ss");// 用于格式化日期,作为日志文件名的一部分        /** 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;      }        public void init(Context context) {        mContext = context;          mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();// 获取系统默认的UncaughtException处理器          Thread.setDefaultUncaughtExceptionHandler(this);// 设置该CrashHandler为程序的默认处理器      }        /**      * 当UncaughtException发生时会转入该重写的方法来处理      */      public void uncaughtException(Thread thread, Throwable ex) {          if (!handleException(ex) && mDefaultHandler != null) {              // 如果自定义的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);// 如果处理了，让程序继续运行3秒再退出，保证文件保存并上传到服务器              } catch (InterruptedException e) {                  e.printStackTrace();              }              // 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      异常信息     * @return true 如果处理了该异常信息;否则返回false.      */      public boolean handleException(Throwable ex) {          if (ex == null)              return false;          new Thread() {              public void run() {                  Looper.prepare();                Log.e("lbsotck",String.valueOf(ex.getMessage()));                Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出", Toast.LENGTH_LONG).show();                Looper.loop();              }          }.start();          // 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 context      */      public void collectDeviceInfo(Context context) {          try {              PackageManager pm = context.getPackageManager();// 获得包管理器              PackageInfo pi = pm.getPackageInfo(context.getPackageName(),                      PackageManager.GET_ACTIVITIES);// 得到该应用的信息，即主Activity              if (pi != null) {                  String versionName = pi.versionName == null ? "null"                          : pi.versionName;                  String versionCode = pi.versionCode + "";                  info.put("versionName", versionName);                  info.put("versionCode", versionCode);              }          } catch (NameNotFoundException e) {              e.printStackTrace();          }            Field[] fields = Build.class.getDeclaredFields();// 反射机制          for (Field field : fields) {              try {                  field.setAccessible(true);                  info.put(field.getName(), field.get("").toString());                  Log.d(TAG, field.getName() + ":" + field.get(""));              } catch (IllegalArgumentException e) {                  e.printStackTrace();              } catch (IllegalAccessException e) {                  e.printStackTrace();              }          }      }        private String saveCrashInfo2File(Throwable ex) {          StringBuffer sb = new StringBuffer();          for (Map.Entry<String, String> entry : info.entrySet()) {              String key = entry.getKey();              String value = entry.getValue();              sb.append(key + "=" + value + "\r\n");          }          Writer writer = new StringWriter();          PrintWriter pw = new PrintWriter(writer);          ex.printStackTrace(pw);          Throwable cause = ex.getCause();          // 循环着把所有的异常信息写入writer中          while (cause != null) {              cause.printStackTrace(pw);              cause = cause.getCause();          }          pw.close();// 记得关闭          String result = writer.toString();          sb.append(result);          // 保存文件          long timetamp = System.currentTimeMillis();          String time = format.format(new Date());      //  String fileName = "crash-" + time + "-" + timetamp + ".log";        String fileName = "crash-" + time + ".log";        if (Environment.getExternalStorageState().equals(                  Environment.MEDIA_MOUNTED)) {              try {                  File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() +                           File.separator + "1lbg");                Log.i("CrashHandler", dir.toString());                  if (!dir.exists())                      dir.mkdir();                  FileOutputStream fos = new FileOutputStream(new File(dir,                           fileName));                  fos.write(sb.toString().getBytes());                  fos.close();                  return fileName;              } catch (FileNotFoundException e) {                  e.printStackTrace();              } catch (IOException e) {                  e.printStackTrace();              }          }          return null;      }  }