对路径做保护

mpmaster/src/main/java/com/xypower/mpmaster/CrashHandler.java

@@ -157,7 +157,11 @@ public class CrashHandler implements Thread.UncaughtExceptionHandler {
             String time = mFormatter.format(new Date());
             String fileName = "crash-" + time + ".log";
             if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
-                String path = MicroPhotoContext.buildMasterAppDir(MpMstApplication.getContext()) + "logs/";
+                String appPath = MicroPhotoContext.buildMasterAppDir(MpMstApplication.getContext());
+                if (appPath == null) {
+                    appPath = "/sdcard/" + MicroPhotoContext.PACKAGE_NAME_MPMASTER + "/";
+                }
+                String path = appPath + "logs/";
                 File dir = new File(path);
                 if (!dir.exists()) {
                     dir.mkdirs();