CODEWITHSUNDEEP
androidbitmap
Neoh
Neoh

Reputation: 16164

What is the unit of bitmap.getWidth() or bitmap.getHeight()

The developers website simply states that getHeight() will return the bitmap's height, but can someone tell me that is in pixel unit or dp unit?

Upvotes: 25

Views: 14213

Answers (5)

Saravana Kumar K R
Saravana Kumar K R

Reputation: 291

bitmap.getWidth() returns width in dp unit or densitiy.

To get dpi (density per inch) for a device, use

float dpi = context.getResources().getDisplayMetrics().density;

To convert dp to px

float px = dp * dpi;

and to convert px to dp

float dp = px/dpi;

Upvotes: 2

Buffalo Pilot
Buffalo Pilot

Reputation: 11

Dividing by getResources()....density.

Upvotes: 0

Gaurav Maan
Gaurav Maan

Reputation: 349

After Hours of Experimenting I found that it actually return height in dp units.You can verify it by changing the device screen in emulator.

Upvotes: 2

MattW
MattW

Reputation: 135

If you read on how android deals with views this not clear at all. See "Supporting Multiple Screeens". After reading that document I have come to the conclusion that "it depends." (And I'm still guessing as I have not verified my analysis.) If the View was declared with size "wrap_content", "fill_parent", or "dp" then you get "dp", otherwise you get pixels. If you used "dp" then scaling to pixels is achieved by multiplying by

getResources().getDisplayMetrics().density

For 160 dpi screen, this returns 1.0; for 320 pi screen this returns 2.0.

Upvotes: 0

vRallev
vRallev

Reputation: 5040

It's pixel. In Java code you usually work with pixels, e.g. a view's width and height.

Upvotes: 15

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