需要将得到的array再变回buffer,使用buffer的 wrap 方法,包装数组得到buffer. // use Bitmap.Config.ARGB_8888 instead of type is OK Bitmap stitchBmp = Bitmap.createBitmap(width, height, type); stitchBmp.copyPixelsFromBuffer(ByteBuffer.wrap(byteArray)); imageView.setImageBitmap(stitc...
// number of bytes in the bitmap int byteCount = bData.Stride * bmp.Height; byte[] bmpBytes = new byte[byteCount]; // Copy the locked bytes from memory Marshal.Copy (bData.Scan0, bmpBytes, 0, byteCount); // don't forget to unlock the bitmap!! bmp.UnlockBits (bData); return...
需要将得到的array再变回buffer,使用buffer的wrap方法,包装数 组得到buffer. //use Bitmap.Config.ARGB_8888 instead of type is OKBitmap stitchBmp =Bitmap.createBitmap(width, height, type); stitchBmp.copyPixelsFromBuffer(ByteBuffer.wrap(byteArray)); imageView.setImageBitmap(stitchBmp); 参考资料 How...
AI代码解释 privatestaticvoidsetDensityFromOptions(Bitmap outputBitmap,Options opts){if(outputBitmap==null||opts==null)return;final int density=opts.inDensity;if(density!=0){outputBitmap.setDensity(density);final int targetDensity=opts.inTargetDensity;if(targetDensity==0||density==targetDensity||...
Bitmap(long nativeBitmap, int width, int height, int density, boolean requestPremultiplied, byte[] ninePatchChunk, NinePatch.InsetStruct ninePatchInsets, boolean fromMalloc) 到这里 Bitmap就创建完毕了 这里得到一个简单的指向关系: 接下来看详细的分配逻辑,在 native 层创建 Bitmap 的时候会有预分...
查看Bitmap.java 的构造方法就会发现 它不是一个 public 方法,而且注释写着 “called from JNI” ,因此它不像普通的类一样能随便new出来 Bitmap(long nativeBitmap, byte[] buffer, int width, int height, int density, boolean isMutable, boolean requestPremultiplied, ...
);return bitmapValue;}// Roaring64Bitmap 转字节数组public static byte[] bitMapToBytes(Roaring64Bitmap bitmap) throws IOException {ByteArrayOutputStream bos = new ByteArrayOutputStream();DataOutputStream dos = new DataOutputStream(bos);bitmap.serialize(dos);dos.close();return bos.toByteArray...
"bytearray:${bytearray.size}" tvQualityJpgInfo.text = "Jpg进行Quality压缩后的信息:$descQualityJpg" ivQualityJpg.setImageBitmap(bmpQualityJpg) /** *将Bitmap的字节流压缩为目标大小 * @targetSize 单位为Byte */ private fun getBytesFromCompressBitmap( ...
开发过程中经常遇到Array<byte>^ 转成 WriteableBitmap^的问题。 刚好抽空写个方法,让大家参数。 首先: byte* BufferFromWriteableBitmap(WriteableBitmap^ bitmap) { IUnknown* pUnknown = reinterpret_cast<IUnknown*>(bitmap->PixelBuffer); IBufferByteAccess* pBufferByteAccess = nullptr; ...
DecodeByteArray(Byte[], Int32, Int32) Decode an immutable bitmap from the specified byte array. DecodeByteArray(Byte[], Int32, Int32, BitmapFactory+Options) Decode an immutable bitmap from the specified byte array. DecodeByteArray(Byte[], Int32, Int32) Decode an immutable bitmap...