Android camera preview look strange

Question

I am implementing a camera app and when I look at the preview (especially with front camera), the image is very fat. It looks like the image get stretched horizontally. I fo

Answer 1

I already solved problem. What could cause problem with strange camera preview.

• Status bar takes spaces - you can hide it Hiding the Status Bar

• Some spaces also take TitleBar - you can turn off this at manifest

android:theme="@android:style/Theme.NoTitleBar">

• Changed activity orientation to landscape "beacuse camera preview support that orientation" - you can check this at API demo Graphics->CameraPreview

• algorithm that compares the size of Display.getWidth () Camera.getParameters size (). getSupportedPreviewSizes (); if they are the same is a function of surfaceChanged change Parametrs.setPreviewSize (x, y) you received when searching the list

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public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    Camera.Parameters setPrevOrientation = mCamera.getParameters();
    if (mHolder.getSurface() == null)
        return;

    try {
        mCamera.stopPreview();
        Size sizeBefore = mCamera.getParameters().getPreviewSize();
        setPrevOrientation.setRotation(setCameraDisplayOrientation(
                (Activity) context, getCameraId(), mCamera));
        // Orientacja Portrait np 640x480 Landscape 480x640
        this.resolution.setPreviewSize(this.optimalPreviewSize.x,
                this.optimalPreviewSize.y);
        mCamera.setParameters(this.resolution);
        Size sizeAfter = mCamera.getParameters().getPreviewSize();
    } catch (RuntimeException e) {

        L.d("Podgląd nie istnieje");
    }

    try {
        mCamera.stopPreview();
        mCamera.setPreviewDisplay(mHolder);
        mCamera.startPreview();

    } catch (Exception e) {
        L.d("błąd podgladu: " + e.getMessage());
    }
 } 

---

    private Point getOptimalPreviewResolution(Display displaySize) {

        lSuportedPreviewSize = mCamera.getParameters()
                .getSupportedPreviewSizes();
        Point optimalPreviewSize = new Point();
        int displayWidth = displaySize.getWidth();
        int displayHeight = displaySize.getHeight();
        int cameraHeight;
        int cameraWidth;

        List lOptimalPoint = new ArrayList();

        for (int i = 0; i < lSuportedPreviewSize.size(); i++) {
            cameraHeight = lSuportedPreviewSize.get(i).width;
            cameraWidth = lSuportedPreviewSize.get(i).height;
            if (displayHeight >= cameraHeight) {
                lOptimalPoint.add(new Point(cameraHeight, cameraWidth));
            }
        }

        // Sort ascending
        Collections.sort(lOptimalPoint,
                new ComapreSupportedPreviewByWidth());
        // Last element is optimal
        optimalPreviewSize = lOptimalPoint.get(lOptimalPoint.size() - 1);

        // Return resolution - camera at landscape mode (800x600)
        return optimalPreviewSize;
    }

---

    class ComapreSupportedPreviewByWidth implements Comparator {

    @Override
    public int compare(Point lhs, Point rhs) {
        return lhs.x - rhs.x;
    }