Geek Answers Handbook

Android, what should be the pivot point for rotating the image around its center of base

Please read the entire question carefully before marking duplication or closing it.

I want to rotate the image (especially the arrow image ) around its center point of the base.

eg. When I start, my image will be like a second hand in the clock by 9. And suppose that if I rotate this image 30 degrees, it should look like the second hand of the stopwatch by 10, and if it is 120 degrees, then the second hand by 1.

So, I want to rotate this image around it in the center (along the x axis) of the base.

So, what should I pass as a rotation (X and Y) if I code first

imageView.setPivotX(1f);
            imageView.setPivotY(1f);
            imageView.setRotation(-30);

or second code

Matrix matrix = new Matrix();
    imageView.setScaleType(ScaleType.MATRIX);
    matrix.postRotate((float) 20, 0f, 0f);
    imageView.setImageMatrix(matrix);

or third code

Bitmap myImg = BitmapFactory.decodeResource(getResources(), R.drawable.arrow_0_degree);
    Matrix matrix = new Matrix();
    matrix.postRotate(30);
    Bitmap rotated = Bitmap.createBitmap(myImg, 0, 1, myImg.getWidth(), myImg.getHeight(), matrix, true);
    imageView.setImageBitmap(rotated);

or fourth code

final RotateAnimation rotateAnim = new RotateAnimation(0.0f, degree,
        RotateAnimation.RELATIVE_TO_SELF, 0.5f,
        RotateAnimation.RELATIVE_TO_SELF, 0.5f);

rotateAnim.setDuration(0);
rotateAnim.setFillAfter(true);
imgview.startAnimation(rotateAnim);

, 90 .

, Google .

. enter image description here

+4
1

^^

:

    final RotateAnimation rotateAnim = new RotateAnimation(0.0f, 30,
            RotateAnimation.RELATIVE_TO_SELF, 0.5f,
            RotateAnimation.RELATIVE_TO_SELF, 1f);
    rotateAnim.setDuration(0);
    rotateAnim.setFillAfter(true);
    mImageView.setAnimation(rotateAnim);
    rotateAnim.start();
+9

More articles:


All Articles