ImageUtil methods should all be static by convention

Author: c0state

utilcode/src/main/java/com/blankj/utilcode/utils/ImageUtils.java

@@ -243,7 +243,7 @@ public static Bitmap getBitmap(String filePath, int maxWidth, int maxHeight) {
      * @param is 输入流
      * @return bitmap
      */
-    public Bitmap getBitmap(InputStream is) {
+    public static Bitmap getBitmap(InputStream is) {
         if (is == null) return null;
         return BitmapFactory.decodeStream(is);
     }
@@ -273,7 +273,7 @@ public static Bitmap getBitmap(InputStream is, int maxWidth, int maxHeight) {
      * @param offset 偏移量
      * @return bitmap
      */
-    public Bitmap getBitmap(byte[] data, int offset) {
+    public static Bitmap getBitmap(byte[] data, int offset) {
         if (data.length == 0) return null;
         return BitmapFactory.decodeByteArray(data, offset, data.length);
     }
@@ -1488,4 +1488,4 @@ public static Bitmap compressBySampleSize(Bitmap src, int sampleSize, boolean re
         if (recycle && !src.isRecycled()) src.recycle();
         return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, options);
     }
-}
+}