2014/10/16 上午 08:11:33

android Programming Glossary: copypixelstobuffer

http://stackoverflow.com/questions/10191871/converting-bitmap-to-bytearray-android

base64 share improve this question You can use copyPixelsToBuffer to move the pixel data to a Buffer or you can use getPixels.. and then convert the integers to bytes with bit shifting. copyPixelsToBuffer is probably what you'll want to use so here is an example on.. buffer ByteBuffer.allocate bytes Create a new buffer b.copyPixelsToBuffer buffer Move the byte data to the buffer byte array buffer.array..

converting Java bitmap to byte array

http://stackoverflow.com/questions/4989182/converting-java-bitmap-to-byte-array

bmp.getHeight ByteBuffer b ByteBuffer.allocate size bmp.copyPixelsToBuffer b byte bytes new byte size try b.get bytes 0 bytes.length catch.. with byte When I look at the buffer after the call to copyPixelsToBuffer the bytes are all 0... The bitmap returned from the camera is..

Access to raw data in ARGB_8888 Android Bitmap

http://stackoverflow.com/questions/5010545/access-to-raw-data-in-argb-8888-android-bitmap

data of a Bitmap in ARGB_8888 format on Android using the copyPixelsToBuffer and copyPixelsFromBuffer methods. However invocation of those.. new byte 4 ByteBuffer buffer ByteBuffer.wrap store one.copyPixelsToBuffer buffer Change value of the pixel int value buffer.getInt 0 Log.v.. copy which is what it seems to be doing . Is this how copyPixelsToBuffer and copyPixelsFromBuffer are supposed to work Is there any way..

Converting bitmap to byteArray android

http://stackoverflow.com/questions/10191871/converting-bitmap-to-bytearray-android

and send to the server. Any pointers android bitmap bytearray base64 share improve this question You can use copyPixelsToBuffer to move the pixel data to a Buffer or you can use getPixels and then convert the integers to bytes with bit shifting. copyPixelsToBuffer.. to move the pixel data to a Buffer or you can use getPixels and then convert the integers to bytes with bit shifting. copyPixelsToBuffer is probably what you'll want to use so here is an example on how you can use it b is the Bitmap calculate how many bytes.. use 32bit images. int bytes b.getWidth b.getHeight 4 ByteBuffer buffer ByteBuffer.allocate bytes Create a new buffer b.copyPixelsToBuffer buffer Move the byte data to the buffer byte array buffer.array Get the underlying array containing the data. share improve..

converting Java bitmap to byte array

http://stackoverflow.com/questions/4989182/converting-java-bitmap-to-byte-array

Bitmap bmp intent.getExtras .get data int size bmp.getRowBytes bmp.getHeight ByteBuffer b ByteBuffer.allocate size bmp.copyPixelsToBuffer b byte bytes new byte size try b.get bytes 0 bytes.length catch BufferUnderflowException e always happens do something with.. catch BufferUnderflowException e always happens do something with byte When I look at the buffer after the call to copyPixelsToBuffer the bytes are all 0... The bitmap returned from the camera is immutable... but that shouldn't matter since it's doing a..

Access to raw data in ARGB_8888 Android Bitmap

http://stackoverflow.com/questions/5010545/access-to-raw-data-in-argb-8888-android-bitmap

in ARGB_8888 Android Bitmap I am trying to access the raw data of a Bitmap in ARGB_8888 format on Android using the copyPixelsToBuffer and copyPixelsFromBuffer methods. However invocation of those calls seems to always apply the alpha channel to the rgb channels... one.getPixel 0 0 Copy Bitmap to buffer byte store new byte 4 ByteBuffer buffer ByteBuffer.wrap store one.copyPixelsToBuffer buffer Change value of the pixel int value buffer.getInt 0 Log.v value before Integer.toHexString value value value 8 0xffffff00.. But I don't want the alpha channel to be applied upon every copy which is what it seems to be doing . Is this how copyPixelsToBuffer and copyPixelsFromBuffer are supposed to work Is there any way to get the raw data in a byte Added in response to answer..