List sizeList = parameters.getSupportedPreviewSizes();

int PreviewWidth = 640;

int PreviewHeight = 480;

Boolean findSize = false;

if (sizeList.size() > 1) {

Iterator itor = sizeList.iterator();

while (itor.hasNext()) {

Camera.Size cur = itor.next();

if (cur.width >= PreviewWidth

&& cur.height >= PreviewHeight) {

findSize = true;

PreviewWidth = cur.width;

PreviewHeight = cur.height;

break;

}

}

}

if (!findSize) {

PreviewWidth = sizeList.get(0).width;

PreviewHeight = sizeList.get(0).height;

}

parameters.setPreviewSize(PreviewWidth, PreviewHeight);