我正在尝试实现WebChromeClient的子类，以便在WebView中的YouTube嵌入视频链接（例如：https://www.youtube.com/embed/dQw4w9WgXcQ）上拥有可工作的全屏按钮。
我基本上简化了this repo，这里是一些片段：
VideoWebChromeClient：
public class VideoWebChromeClient extends WebChromeClient {
private boolean isVideoFullscreen = false;
private View activityNonVideoView;
private ViewGroup activityVideoView;
private View videoViewContainer;
private CustomViewCallback videoCallback;
private Window videoWindow;
public VideoWebChromeClient(View activityNonVideoView, ViewGroup activityVideoView, Window window) {
this.activityNonVideoView = activityNonVideoView;
this.activityVideoView = activityVideoView;
this.videoWindow = window;
}
@Override
public void onShowCustomView(View view, CustomViewCallback callback) {
Log.w("ENTER FULLSCREEN");
videoCallback = callback;
videoViewContainer = view;
videoWindow.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
activityNonVideoView.setVisibility(View.GONE);
activityVideoView.addView(videoViewContainer, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
activityVideoView.setVisibility(View.VISIBLE);
isVideoFullscreen = true;
}
@Override
public void onHideCustomView() {
if (!isVideoFullscreen) {
return;
}
Log.w("EXIT FULLSCREEN");
activityVideoView.setVisibility(View.GONE);
activityVideoView.removeView(videoViewContainer);
activityNonVideoView.setVisibility(View.VISIBLE);
videoWindow.clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
videoViewContainer = null;
videoCallback.onCustomViewHidden();
isVideoFullscreen = false;
}
public boolean onBackPressed() {
onHideCustomView();
return isVideoFullscreen;
}
}
WebViewActivity
public class WebViewActivity extends BaseActivity {
public static final String WEB_VIEW_URL_EXTRA = "URL";
private boolean loadedFirstURL = true;
private VideoWebChromeClient mWebChromeClient;
@Bind(webview)
WebView mWebView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(provideLayoutId());
String url = (String) getIntent().getSerializableExtra(WEB_VIEW_URL_EXTRA);
// Check if URL is YouTube / Vimeo
if (RegexHelper.isVideoURL(url)){
// Allow Fullscreen
final View defaultLayout = findViewById(R.id.defaultLayout);
final View fullscreenLayout = findViewById(R.id.fullscreenLayout);
mWebChromeClient = new VideoWebChromeClient(defaultLayout, (ViewGroup) fullscreenLayout, getWindow());
mWebView.setWebChromeClient(mWebChromeClient);
// Block external links
mWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (loadedFirstURL) {
loadedFirstURL = false;
return false;
}
return true;
}
});
}
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.loadUrl(url);
}
@Override
public void onBackPressed() {
if (!mWebChromeClient.onBackPressed())
{
if (mWebView.canGoBack()) {
mWebView.goBack();
}
else {
super.onBackPressed();
}
}
}
}
它在KitKat上可以正常工作，但在Nougat上无法正常工作（我只有这两个设备进行测试）：当我点击全屏按钮时，有时会进入全屏模式，但大多数情况下会“闪烁”并保持非全屏状态。
然后，当它实际处于全屏模式时，退出全屏的按钮不起作用（onHideCustomView根本没有被调用）
您可以看到，我放置了日志并注意到当“闪烁”发生时，onHideCustomView实际上是在onShowCustomView之后立即调用的（"ENTER FULLSCREEN"然后立即"EXIT FULLSCREEN"），我不明白为什么。
如果有人能指向解决方案，非常感谢。