全面升级代码到androidX以获得更好的兼容性和可以使用android最新的特性

JCVideo_Library/src/main/java/fm/jiecao/jcvideoplayer_lib/JCUtils.java

@@ -6,9 +6,8 @@ import android.content.ContextWrapper;
 import android.content.SharedPreferences;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.view.ContextThemeWrapper;
 import android.text.TextUtils;
+import android.view.ContextThemeWrapper;
 
 import java.util.Formatter;
 import java.util.Locale;
@@ -66,22 +65,6 @@ public class JCUtils {
         return null;
     }
 
-    /**
-     * Get AppCompatActivity from context
-     *
-     * @param context
-     * @return AppCompatActivity if it's not null
-     */
-    public static AppCompatActivity getAppCompActivity(Context context) {
-        if (context == null) return null;
-        if (context instanceof AppCompatActivity) {
-            return (AppCompatActivity) context;
-        } else if (context instanceof ContextThemeWrapper) {
-            return getAppCompActivity(((ContextThemeWrapper) context).getBaseContext());
-        }
-        return null;
-    }
-
     public static int dip2px(Context context, float dpValue) {
         final float scale = context.getResources().getDisplayMetrics().density;
         return (int) (dpValue * scale + 0.5f);

JCVideo_Library/src/main/java/fm/jiecao/jcvideoplayer_lib/JCVideoPlayer.java

@@ -9,8 +9,6 @@ import android.hardware.SensorManager;
 import android.media.AudioManager;
 import android.media.MediaPlayer;
 import android.os.Handler;
-import android.provider.Settings;
-import android.support.v7.app.ActionBar;
 import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.Log;