图像缩放不合适

发布于 2024-12-26 02:21:19 字数 498 浏览 0 评论 0原文

我想捏缩放图像，但问题是当我缩放时，它不会从我手指所在的位置放大和缩小。它转到点 0, 0。

这是我的代码：

@Override
public boolean onScale(ScaleGestureDetector detector) {
    mScaleFactor = detector.getScaleFactor();

    Log.e("ScaleFactor", "" + mScaleFactor);

    // Don't let the object get too small or too large.
    mScaleFactor = Math.max(0.4f, Math.min(mScaleFactor, 5.0f));
    if(mScaleFactor>=1)
        mScaleFactor=1f;

    invalidate();
    return true;
}

我尝试了很多，但可以找到任何方法来解决这个问题。

原文

I want to pinch zoom an image but problem is when I zoom it does not zoom in and out from where my fingers are. It goes to point 0, 0.

Here is my code:

@Override
public boolean onScale(ScaleGestureDetector detector) {
    mScaleFactor = detector.getScaleFactor();

    Log.e("ScaleFactor", "" + mScaleFactor);

    // Don't let the object get too small or too large.
    mScaleFactor = Math.max(0.4f, Math.min(mScaleFactor, 5.0f));
    if(mScaleFactor>=1)
        mScaleFactor=1f;

    invalidate();
    return true;
}

I tried a lot but could get any way to fix this.

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久光 2025-01-02 02:21:19

这很有用

private float[] matrixValues = new float[9];
private float maxZoom;
private float minZoom;
private float height;
private float width;
private RectF viewRect; 


private void init() {
    maxZoom = 4;
    minZoom = 0.25f;
    height = myimage.getDrawable().getIntrinsicHeight()+20;
    width = myimage.getDrawable().getIntrinsicWidth()+20;
    viewRect = new RectF(0, 0, myimage.getWidth()+20, myimage.getHeight()+20);
}

it is useful

private float[] matrixValues = new float[9];
private float maxZoom;
private float minZoom;
private float height;
private float width;
private RectF viewRect; 


private void init() {
    maxZoom = 4;
    minZoom = 0.25f;
    height = myimage.getDrawable().getIntrinsicHeight()+20;
    width = myimage.getDrawable().getIntrinsicWidth()+20;
    viewRect = new RectF(0, 0, myimage.getWidth()+20, myimage.getHeight()+20);
}

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