Ich habe versucht, ZoomIn / ZoomOut auf dem Gerät 's4 zoom' in meiner Kameraaufzeichnungsanwendung zu verarbeiten. Weil es nur regulären Zoom unterstützt, d.h.parameters.isZoomSupported()==true, parameters.isSmoothZoomSupported()==false, Ich habe benutztparameters.setZoom(mZoomVal); mCamera.setParameters(parameters); wie gewöhnlich. Das Problem ist, Zoom ist ruckelig, laut und nicht flüssig. Weiß jemand, wie man mit der Zoomgeschwindigkeit in 's4 zoom' umgeht, wie es in der Samsung-Kamera-App gemacht wurde?

public boolean onKeyDown(int keyCode, KeyEvent event) {
    Log.v("onKeyDown keyCode="+keyCode+" event="+event.toString());

    boolean handled = false;
    switch(keyCode){
    case KeyEvent.KEYCODE_FOCUS:
        setAutoFocus();
        handled = true;
        break;
    case KeyEvent.KEYCODE_CAMERA:

        if(event.getRepeatCount() == 0){
            if (isRec()) {
                stopRec(1, 0);
            } else {
                startRec();
            }
        }

        handled = true;
        break;
    case 256: //KeyEvent.KEYCODE_CAMERA_ZOOM_RING_MOVE:
        handled = true;
        break;
    case 261: //KeyEvent.KEYCODE_CAMERA_ZOOM_RING_SPEED2
        handled = true;
        break;
    case KeyEvent.KEYCODE_ZOOM_IN:
        setZoomIn();
        //AutoFocus();
        handled = true;
        break;
    case KeyEvent.KEYCODE_ZOOM_OUT:
        setZoomOut();
        //AutoFocus();
        handled = true;
        break;
    }

    if(handled)
        Log.v("onKeyDown HANDLED!");
    else
        return super.onKeyDown(keyCode, event);

    return handled;
}
public int setZoomIn(){
    if(mCamera == null){
        return 0;
    }

    Parameters parameters = mCamera.getParameters();
    List<Integer> zoom_list = parameters.getZoomRatios();
    if(mZoomVal >= mZoomMax)
        return zoom_list.get(mZoomMax);

    /*
    if(isAutoFocusing){
        mCamera.cancelAutoFocus();
        isAutoFocusing = false;
    }*/


    mZoomVal++;
    isFocused = false;

    parameters.setZoom(mZoomVal);
    mCamera.setParameters(parameters);

    mZoomVal = parameters.getZoom();

    return zoom_list.get(mZoomVal);
}

public int setZoomOut(){
    if(mCamera == null){
        return 0;
    }

    Parameters parameters = mCamera.getParameters();
    List<Integer> zoom_list = parameters.getZoomRatios();
    if(mZoomVal <= 0)
        return zoom_list.get(0);

    /*
    if(isAutoFocusing){
        mCamera.cancelAutoFocus();
        isAutoFocusing = false;
    }*/


    mZoomVal--;
    isFocused = false;

    parameters.setZoom(mZoomVal);
    mCamera.setParameters(parameters);

    mZoomVal = parameters.getZoom();

    return zoom_list.get(mZoomVal);
}

public void setAutoFocus(){
    if(mCamera == null){
        return;
    }

    if(isFocused)
        return;

    if(isAutoFocusing){
        mCamera.cancelAutoFocus();
        isAutoFocusing = false;
    }

    isAutoFocusing = true;
    mCamera.autoFocus(new Camera.AutoFocusCallback() {

        @Override
        public void onAutoFocus(boolean success, Camera camera) {
            Log.v("onAutoFocus success="+success);
            isAutoFocusing = false;
            isFocused = success;
        }
    });

}