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Android bitmap conversion to and from byte array
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import android.graphics.Bitmap; | |
import android.graphics.BitmapFactory; | |
import android.graphics.drawable.BitmapDrawable; | |
import android.util.Log; | |
import java.io.ByteArrayInputStream; | |
import java.io.ByteArrayOutputStream; | |
import java.io.IOException; | |
import java.nio.ByteBuffer; | |
public final class BitmapUtils { | |
private BitmapUtils(){} | |
/** | |
* Converts bitmap to byte array in PNG format | |
* @param bitmap source bitmap | |
* @return result byte array | |
*/ | |
public static byte[] convertBitmapToByteArray(Bitmap bitmap){ | |
ByteArrayOutputStream baos = null; | |
try { | |
baos = new ByteArrayOutputStream(); | |
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos); | |
return baos.toByteArray(); | |
}finally { | |
if(baos != null){ | |
try { | |
baos.close(); | |
} catch (IOException e) { | |
Log.e(BitmapUtils.class.getSimpleName(), "ByteArrayOutputStream was not closed"); | |
} | |
} | |
} | |
} | |
/** | |
* Converts bitmap to the byte array without compression | |
* @param bitmap source bitmap | |
* @return result byte array | |
*/ | |
public static byte[] convertBitmapToByteArrayUncompressed(Bitmap bitmap){ | |
ByteBuffer byteBuffer = ByteBuffer.allocate(bitmap.getByteCount()); | |
bitmap.copyPixelsToBuffer(byteBuffer); | |
byteBuffer.rewind(); | |
return byteBuffer.array(); | |
} | |
/** | |
* Converts compressed byte array to bitmap | |
* @param src source array | |
* @return result bitmap | |
*/ | |
public static Bitmap convertCompressedByteArrayToBitmap(byte[] src){ | |
return BitmapFactory.decodeByteArray(src, 0, src.length); | |
} | |
} |
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