add .gitignore

.android/app/src/main/java/com/example/myflutter/host/MainActivity.java

+package com.example.myflutter.host;
+
+import android.os.Bundle;
+import io.flutter.app.FlutterActivity;
+import io.flutter.plugins.GeneratedPluginRegistrant;
+
+public class MainActivity extends FlutterActivity {
+  @Override
+  protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    GeneratedPluginRegistrant.registerWith(this);
+  }
+}

.gitignore

@@ -36,6 +36,8 @@ Icon?
 .tags*
 
 *.android/local.properties
+#*.android/app/src/main/java/com/example/myflutter/
+*..android/app/src/main/java/
 build/
 # 暂时忽略不追踪  因为android 要跑起来需要更改很多配置
 #.android/