安卓 WebView : zoom to a specific scale after content is loaded

Question

WebView的内容加载后如何缩放到特定比例？ (我不想重新加载内容。)

我正在使用 Android 2.3 及更高版本。

Answer 1

解决方案 1:这里我们按百分比设置缩放级别，这意味着当页面准备就绪时，getScale 将返回 5.2f:

mView.setWebViewClient(new WebViewClient() {
    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
        view.setInitialScale(520);

        super.onPageStarted(view, url, favicon);
    }

解决方案 2:此方法不是 100% 准确，因为它将比例四舍五入为 int 值:

private WebView mView;
private Handler mZoomHandler = new Handler();
private Runnable mZoomRunnable = new Runnable() {

    @Override
    public void run() {
        if ((int) mView.getScale() < WANTED_SCALE) {
            mView.zoomIn();
            mZoomHandler.postDelayed(this, 10);
        } else if ((int) mView.getScale() > WANTED_SCALE) {
            mView.zoomOut();
            mZoomHandler.postDelayed(this, 10);
        }
    }
};

mView.getSettings().setSupportZoom(true);
mView.setWebViewClient(new WebViewClient() {
    @Override
    public void onPageFinished(WebView view, String url) {
        super.onPageFinished(view, url);
        mZoomRunnable.run();
    }
});