解决ScrollView中嵌入WebView产生的冲突

遇到ScrollView中嵌入WebView，针对部分手机第一次加载WebView出现白屏（即WebView无法展示）。解决方法是去掉WebView的滚动效果，让它按照既有的长度展示，由外层ScrollView来滚动展示WebView。

public class ScrollWebView extends WebView {

    public ScrollWebView(Context context) {
        this(context, null);
    }

    public ScrollWebView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public ScrollWebView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        WebSettings webSettings = getSettings();
        webSettings.setJavaScriptEnabled(true);
        webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NORMAL);
        webSettings.setPluginState(WebSettings.PluginState.ON);
        webSettings.setDomStorageEnabled(true);
        webSettings.setDefaultTextEncodingName("UTF-8");
        webSettings.setAllowUniversalAccessFromFileURLs(true);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_ALWAYS_ALLOW);
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int mExpandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, mExpandSpec);
    }
}