Circularimageview And Api 16: Nullpointerexception Error

I was testing my app on different APIs and it seems to work on API 17 till 23 but I found in API 16, I cannot load my customview. I just want to display a photo in a circle and I h

Solution 1:

Well since your bitmap is null and the drawable isn't the only place the error can be at is within copy(Bitmap, boolean).

If you look at the documentation

If the conversion is not supported, or the allocator fails, then this returns NULL.

Try using a smaller image, since this can be a sign of Low Memory. You should also add some guard against the possible null value returned, e.g. just drawing the normal bitmap in that case.

Solution 2:

Use this method to convert your drawable to a bitmap:

publicstatic Bitmap drawableToBitmap(Drawable drawable) {
    Bitmapbitmap=null;

    if (drawable instanceof BitmapDrawable) {
        BitmapDrawablebitmapDrawable= (BitmapDrawable) drawable;
        if(bitmapDrawable.getBitmap() != null) {
            return bitmapDrawable.getBitmap();
        }
    }

    if(drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
        bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
    } else {
        bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
    }

    Canvascanvas=newCanvas(bitmap);
    drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
    drawable.draw(canvas);
    return bitmap;
}

Then instead of using in the original code, the following line:

Bitmapb= ((BitmapDrawable) drawable).getBitmap();

Use this instead:

Bitmapb= drawableToBitmap(drawable);

Then it will run without error.

Solution 3:

You can use MLRoundedImageView for circular imageview. MLRoundedImageView.java

publicclassMLRoundedImageViewextendsImageView {

publicMLRoundedImageView(Context context) {
    super(context);
}

publicMLRoundedImageView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

publicMLRoundedImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}

@OverrideprotectedvoidonDraw(Canvas canvas) {

    Drawabledrawable= getDrawable();

    if (drawable == null) {
        return;
    }

    if (getWidth() == 0 || getHeight() == 0) {
        return;
    }
    Bitmapb= ((BitmapDrawable) drawable).getBitmap();
    Bitmapbitmap= b.copy(Bitmap.Config.ARGB_8888, true);

    intw= getWidth(), h = getHeight();

    BitmaproundBitmap= getCroppedBitmap(bitmap, w);
    canvas.drawBitmap(roundBitmap, 0, 0, null);

}

publicstatic Bitmap getCroppedBitmap(Bitmap bmp, int radius) {
    Bitmap sbmp;

    if (bmp.getWidth() != radius || bmp.getHeight() != radius) {
        floatsmallest= Math.min(bmp.getWidth(), bmp.getHeight());
        floatfactor= smallest / radius;
        sbmp = Bitmap.createScaledBitmap(bmp, (int)(bmp.getWidth() / factor), (int)(bmp.getHeight() / factor), false);
    } else {
        sbmp = bmp;
    }

    Bitmapoutput= Bitmap.createBitmap(radius, radius,
            Config.ARGB_8888);
    Canvascanvas=newCanvas(output);

    finalintcolor=0xffa19774;
    finalPaintpaint=newPaint();
    finalRectrect=newRect(0, 0, radius, radius);

    paint.setAntiAlias(true);
    paint.setFilterBitmap(true);
    paint.setDither(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(Color.parseColor("#BAB399"));
    canvas.drawCircle(radius / 2 + 0.7f,
            radius / 2 + 0.7f, radius / 2 + 0.1f, paint);
    paint.setXfermode(newPorterDuffXfermode(Mode.SRC_IN));
    canvas.drawBitmap(sbmp, rect, rect, paint);

    return output;
}
}

Then use like this in layout

<com.yourproject.MLRoundedImagViewLayoutpropertieshere />

Then in your activity

MLRoundedImagViewimageview= (MLRoundedImagView) findViewbyId(R.id.imageview);