收集设备信息，用于信息统计分析

public static Properties collectDeviceInfo(Context context) {
     Properties mDeviceCrashInfo = new Properties();
     try {

       PackageManager pm = context.getPackageManager();

       PackageInfo pi = pm.getPackageInfo(context.getPackageName(),

           PackageManager.GET_ACTIVITIES);

       if (pi != null ) {

         mDeviceCrashInfo.put(VERSION_NAME,

             pi.versionName == null ? "not set" : pi.versionName);

         mDeviceCrashInfo.put(VERSION_CODE, pi.versionCode);

       }

     } catch (PackageManager.NameNotFoundException e) {

       Log.e(TAG, "Error while collect package info" , e);

     }

     Field[] fields = Build. class .getDeclaredFields();

     for (Field field : fields) {

       try {

         field.setAccessible( true );

         mDeviceCrashInfo.put(field.getName(), field.get( null ));

       } catch (Exception e) {

         Log.e(TAG, "Error while collect crash info" , e);

       }

     }

     return mDeviceCrashInfo;

   }

public static String collectDeviceInfoStr(Context context) {

     Properties prop = collectDeviceInfo(context);

     Set deviceInfos = prop.keySet();

     StringBuilder deviceInfoStr = new StringBuilder( "{\n" );

     for (Iterator iter = deviceInfos.iterator(); iter.hasNext();) {

       Object item = iter.next();

       deviceInfoStr.append( "\t\t\t" + item + ":" + prop.get(item)

           + ", \n" );

     }

     deviceInfoStr.append( "}" );

     return deviceInfoStr.toString();

   }