What is portable wi-fi hotspot?

Portable Wi-Fi Hotspot allows you to share your mobile internet connection to other wireless device. For examples, using your Android-powered phone as a Wi-Fi Hotspot, you can use your laptop to connect to the Internet using that access-point.

What is the difference between a regular bitmap and a nine-patch images?

In general, a Nine_patch image allows resizing that can be used as background or other image size requirements for the target device. The Nine-patch refers to the way you can resize the image: 4 corners that are unscaled, 4 edges that are scaled in 1 axis, and the middle one that can be scaled into both axes

How to store images of an activity into android phone gallery?

MediaStore.Images.Media.insertImage(getContentResolver(),
yourBitmap,yourTitle,yourDescription);

ContentValues values = new ContentValues(); values.put(Images.Media.DATE_TAKEN, System.currentTimeMillis()); values.put(Images.Media.MIME_TYPE, "image/jpeg"); values.put(MediaStore.MediaColumns.DATA, filePath); context.getContentResolver().insert(Images.Media.EXTERNAL_CONTENT_URI, values);

What is the base class for any android application?

Application