Question

我有WebView嵌入了youtube视频。我使用简单的对话框解决方案实现了全屏模式，如下所示：

webView.setWebChromeClient(new CustomWebChromeClient());

public class CustomWebChromeClient extends WebChromeClient {
    @Override
    public void onShowCustomView(View view, CustomViewCallback callback) {
        Dialog dialog = new Dialog(ArticleDetailsActivity.this, android.R.style.Theme_Black_NoTitleBar_Fullscreen);
        view.setBackgroundColor(getResources().getColor(R.color.black));
        dialog.setContentView(view);
        dialog.show();
    }

    @Override
    public void onHideCustomView() {
        super.onHideCustomView();
    }
}

除了使用后退按钮关闭视频时，它的效果非常好，因为全屏视频消失，白色全屏覆盖保留在屏幕上，直到另一个后退按钮使用。我试图变得聪明，在onBackPressed()内做了onHideCustomView()，但随后整个活动就完成了。

如何摆脱白色的帷幕？

Answer 1

有人挖掘了android代码并找到了解决方案：

    public class CustomWebChromeClient extends WebChromeClient {

    @Override
    public void onShowCustomView(View view, final CustomViewCallback callback) {
        Dialog dialog = new Dialog(ArticleDetailsActivity.this, android.R.style.Theme_Black_NoTitleBar_Fullscreen);
        view.setBackgroundColor(getResources().getColor(R.color.black));
        dialog.setContentView(view);
        dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
            @Override
            public void onDismiss(DialogInterface dialog) {
                callback.onCustomViewHidden();
                chromeWebClient.onHideCustomView();
            }
        });
        dialog.show();
    }

    @Override
    public void onHideCustomView() {
        super.onHideCustomView();
    }
}

已连接问题 - 已解决： 在重新打开活动并再次播放视频时，有时会在HTML5VideoView.reprepareData时发生此次崩溃，或在调用HTML5VideoView.isPlaying时webView.onPause()这似乎是另一个问题......

最终注释

为了使WebView正常工作而不泄漏内存，您应该在WebViewMethods或Activity生命周期回调中调用相应的Fragment，如下所示Activity（可能某种方式类似于Fragment）：

@Override
protected void onCreate(Bundle savedInstanceState) {
    if (savedInstanceState == null) {
        webView.restoreState(savedInstanceState);
    } 
}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putBoolean(BundleKeys.HAS_PHOTOS, hasPhotos);
    outState.putLong(BundleKeys.ARTICLE_ID, articleId);
    webView.saveState(outState);
}

@Override
protected void onResume() {
    webView.onResume();
}

@Override
protected void onPause() {
    super.onPause();
    webView.onPause();
}

@Override
protected void onStop() {
    super.onStop();
    webView.stopLoading();
}

@Override
protected void onDestroy() {
    super.onDestroy();
    webView.destroy();
}

关闭从WebView打开的全屏视频后的白屏

1 个答案: