改为使用getApplicationContext获取wifiManager，避免内存泄露

The WIFI_SERVICE must be looked up on the Application context or memory will leak on devices < Android N. Try changing getSystemService to getApplicationContext().getSystemService

JCVideo_Library/src/androidTest/java/fm/jiecao/jcvideoplayer_lib/ApplicationTest.java

@@ -1,13 +0,0 @@
-package fm.jiecao.jcvideoplayer_lib;
-
-import android.app.Application;
-import android.test.ApplicationTestCase;
-
-/**
- * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
- */
-public class ApplicationTest extends ApplicationTestCase<Application> {
-    public ApplicationTest() {
-        super(Application.class);
-    }
-}