How to Convert Android.Media.Image to Bitmap Object

Android: Convert image object to bitmap does not work

You haven't copied bytes.You checked capacity but not copied bytes.

ByteBuffer buffer = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.remaining()];
buffer.get(bytes);
Bitmap myBitmap = BitmapFactory.decodeByteArray(bytes,0,bytes.length,null);

Android Media Image to Bitmap Conversion for Tensorflow Lite

The null return value suggests that the image data could not be decoded when you call BitmapFactory.decodeByteArray. You may check your input contents first.

Here is a link to another similar question about how to convert android.media.image to Bitmap : How to convert android.media.Image to bitmap object?

If it doesn't work, you may also try to check and handle Java error, where this question may be helpful How do I keep track of Java Exceptions

converting drawable resource image into bitmap

You probably mean Notification.Builder.setLargeIcon(Bitmap), right? :)

Bitmap largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.large_icon);
notBuilder.setLargeIcon(largeIcon);

This is a great method of converting resource images into Android Bitmaps.

converting image to bitmap in android

use this code

Bitmap bmp=BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));

How to create Bitmap from Android MediaImage in OUTPUT_IMAGE_FORMAT_RGBA_8888 format?

I actually found a solution myself, so I post it here if anyone is interested:

private Bitmap toBitmap(Image image) {
    Image.Plane[] planes = image.getPlanes();
    ByteBuffer buffer = planes[0].getBuffer();
    int pixelStride = planes[0].getPixelStride();
    int rowStride = planes[0].getRowStride();
    int rowPadding = rowStride - pixelStride * image.getWidth();
    Bitmap bitmap = Bitmap.createBitmap(image.getWidth()+rowPadding/pixelStride, 
    image.getHeight(), Bitmap.Config.ARGB_8888);
    bitmap.copyPixelsFromBuffer(buffer);
    return bitmap;
    }

Convert android.media.Image (YUV_420_888) to Bitmap

I write some code about this, and it's the YUV datas preview and chang it to JPEG datas ,and I can use it to save as bitmap ,byte[] ,or others.(You can see the class "Allocation" ).


And SDK document says:
"For efficient YUV processing with android.renderscript: Create a RenderScript Allocation with a supported YUV type, the IO_INPUT flag, and one of the sizes returned by getOutputSizes(Allocation.class), Then obtain the Surface with getSurface()."


here is the code, hope it will help you:https://github.com/pinguo-yuyidong/Camera2/blob/master/camera2/src/main/rs/yuv2rgb.rs

Converting ImageProxy to Bitmap

You will need to check the image.format to see if it is ImageFormat.YUV_420_888. If so , then you can you use this extension to convert image to bitmap:

fun Image.toBitmap(): Bitmap {
    val yBuffer = planes[0].buffer // Y
    val vuBuffer = planes[2].buffer // VU

    val ySize = yBuffer.remaining()
    val vuSize = vuBuffer.remaining()

    val nv21 = ByteArray(ySize + vuSize)

    yBuffer.get(nv21, 0, ySize)
    vuBuffer.get(nv21, ySize, vuSize)

    val yuvImage = YuvImage(nv21, ImageFormat.NV21, this.width, this.height, null)
    val out = ByteArrayOutputStream()
    yuvImage.compressToJpeg(Rect(0, 0, yuvImage.width, yuvImage.height), 50, out)
    val imageBytes = out.toByteArray()
    return BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.size)
}

This works for a number of camera configurations. However, you might need to use a more advanced method that considers pixel strides.

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