update readme

Author: garryyan

README.md

@@ -72,13 +72,16 @@ System.loadLibrary("marsxlog");
 final String SDCARD = Environment.getExternalStorageDirectory().getAbsolutePath();
 final String logPath = SDCARD + "/marssample/log";
 
+// this is necessary, or may cash for SIGBUS
+final String cachePath = this.getFilesDir() + "/xlog"
+
 //init xlog
 if (BuildConfig.DEBUG) {
-    Xlog.appenderOpen(Xlog.LEVEL_DEBUG, Xlog.AppednerModeAsync, "", logPath, "MarsSample");
+    Xlog.appenderOpen(Xlog.LEVEL_DEBUG, Xlog.AppednerModeAsync, cachePath, logPath, "MarsSample");
     Xlog.setConsoleLogOpen(true);
 
 } else {
-    Xlog.appenderOpen(Xlog.LEVEL_INFO, Xlog.AppednerModeAsync, "", logPath, "MarsSample");
+    Xlog.appenderOpen(Xlog.LEVEL_INFO, Xlog.AppednerModeAsync, cachePath, logPath, "MarsSample");
     Xlog.setConsoleLogOpen(false);
 }
 
@@ -359,13 +362,16 @@ System.loadLibrary("marsxlog");
 final String SDCARD = Environment.getExternalStorageDirectory().getAbsolutePath();
 final String logPath = SDCARD + "/marssample/log";
 
+// this is necessary, or may cash for SIGBUS
+final String cachePath = this.getFilesDir() + "/xlog"
+
 //init xlog
 if (BuildConfig.DEBUG) {
-    Xlog.appenderOpen(Xlog.LEVEL_DEBUG, Xlog.AppednerModeAsync, "", logPath, "MarsSample");
+    Xlog.appenderOpen(Xlog.LEVEL_DEBUG, Xlog.AppednerModeAsync, cachePath, logPath, "MarsSample");
     Xlog.setConsoleLogOpen(true);
 
 } else {
-    Xlog.appenderOpen(Xlog.LEVEL_INFO, Xlog.AppednerModeAsync, "", logPath, "MarsSample");
+    Xlog.appenderOpen(Xlog.LEVEL_INFO, Xlog.AppednerModeAsync, cachePath, logPath, "MarsSample");
     Xlog.setConsoleLogOpen(false);
 }