优化日志监控的代码

app/src/main/java/com/xypower/mpapp/MainActivity.java

@@ -82,6 +82,7 @@ public class MainActivity extends AppCompatActivity {
         @Override
         public void onEvent(int event, String s) {
             int e = event & FileObserver.ALL_EVENTS;
+
             if (e == FileObserver.MODIFY) {
                 File file = new File(mPath);
                 long newOffset = file.length();
@@ -98,6 +99,8 @@ public class MainActivity extends AppCompatActivity {
                     msg.arg1 = bytesRead;
                     mHandler.sendMessage(msg);
                 }
+            } else if (e == FileObserver.CREATE) {
+                mOffset = 0;
             }
         }
     }
@@ -529,7 +532,16 @@ public class MainActivity extends AppCompatActivity {
 
         try {
             String logFilePath = MicroPhotoContext.buildAppDir(this.getApplicationContext());
-            logFilePath += "logs/log.txt";
+            logFilePath += "logs";
+            File file = new File(logFilePath);
+            if (!file.exists()) {
+                file.mkdirs();
+            }
+            logFilePath += "/log.txt";
+            file = new File(logFilePath);
+            if (!file.exists()) {
+                file.createNewFile();
+            }
 
             mLogFileObserver = new LogFileObserver(logFilePath);
             mLogFileObserver.startWatching();