webview 视频横屏 方法

1.

myWebView = (WebView) findViewById(R.id.webView1);

private MyWebChromeClient mWebChromeClient = null;
private View mCustomView;
private RelativeLayout mContentView;
private FrameLayout mCustomViewContainer;
private WebChromeClient.CustomViewCallback mCustomViewCallback;

private class MyWebChromeClient extends WebChromeClient {
    FrameLayout.LayoutParams LayoutParameters = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,
            FrameLayout.LayoutParams.MATCH_PARENT);

    @Override
    public void onShowCustomView(View view, CustomViewCallback callback) {
        // if a view already exists then immediately terminate the new one
        if (mCustomView != null) {
            callback.onCustomViewHidden();
            return;
        }
        mContentView = (RelativeLayout) findViewById(R.id.activity_main);
        mContentView.setVisibility(View.GONE);
        mCustomViewContainer = new FrameLayout(MainActivity.this);
        mCustomViewContainer.setLayoutParams(LayoutParameters);
        mCustomViewContainer.setBackgroundResource(android.R.color.black);
        view.setLayoutParams(LayoutParameters);
        mCustomViewContainer.addView(view);
        mCustomView = view;
        mCustomViewCallback = callback;
        mCustomViewContainer.setVisibility(View.VISIBLE);
        setContentView(mCustomViewContainer);
    }

    @Override
    public void onHideCustomView() {
        if (mCustomView == null) {
            return;
        } else {
            // Hide the custom view.  
            mCustomView.setVisibility(View.GONE);
            // Remove the custom view from its container.  
            mCustomViewContainer.removeView(mCustomView);
            mCustomView = null;
            mCustomViewContainer.setVisibility(View.GONE);
            mCustomViewCallback.onCustomViewHidden();
            // Show the content view.  
            mContentView.setVisibility(View.VISIBLE);
            setContentView(mContentView);
        }
    }
}

@Override
public void onBackPressed() {
    if (mCustomViewContainer != null)
        mWebChromeClient.onHideCustomView();
    else if (myWebView.canGoBack())
        myWebView.goBack();
    else
        super.onBackPressed();
}

2.

new WebViewClient() {

    @Override
    public void onLoadResource(WebView view, String url) {

        if (url.startsWith("http://www.youtube.com/get_video_info?")) {
            try {
                String path = url.replace("http://www.youtube.com/get_video_info?", "");

                String[] parqamValuePairs = path.split("&");

                String videoId = null;

                for (String pair : parqamValuePairs) {
                    if (pair.startsWith("video_id")) {
                        videoId = pair.split("=")[1];
                        break;
                    }
                }

                if(videoId != null){
                    startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.youtube.com"))
                            .setData(Uri.parse("http://www.youtube.com/watch?v=" + videoId)));
                    needRefresh = true;

                    return;
                }
            } catch (Exception ex) {
            }
        } else {
            super.onLoadResource(view, url);
       }
    }
}

3.

WebChromeClient webChromeClient = new WebChromeClient() {
            private ViewGroup rootView;
            private WebChromeClient.CustomViewCallback customViewCallback;

            @Override
            public void onShowCustomView(View view, CustomViewCallback callback) {

                //Destroy full screen view if already exists
                if (fullscreenView != null) {
                    callback.onCustomViewHidden();
                    return;
                }

                //Layout params to fit fullscreen view in our activity
                ViewGroup.LayoutParams layoutParams = 
                        new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                                ViewGroup.LayoutParams.MATCH_PARENT);
                //Catch root of current activity to add fullscreen view
                rootView = (ViewGroup) WebViewBaseActivity.this.webView.getRootView();
                
                //Store full screen view, we need it to destroy it out of scope
                fullscreenView = view;

                customViewCallback = callback;
                rootView.addView(fullscreenView, layoutParams);
            }

            @Override
            public void onHideCustomView() {
                //Make sure fullscreen view exists
                if (fullscreenView != null) {
                    
                    //Remove fullscreen view from activity root view
                    rootView.removeView(fullscreenView);
                    fullscreenView = null;

                    //Tell browser we did remove fullscreen view
                    customViewCallback.onCustomViewHidden();
                }
            }

@Override
public void onBackPressed() {
    if (fullscreenView != null) {
        webChromeClient.onHideCustomView();
    }
}    

4.

https://github.com/Happyandhappy/maginsoftteam-chromecase-Android/blob/e4dd1bca1f4d9c959a26fe7b561fb352f77552af/app/src/main/java/com/oxycast/chromecastapp/web/WebChromeClientEx.java

public class WebChromeClientEx extends WebChromeClient {


    // Fullscreen
    private View mCustomView;
    private WebChromeClient.CustomViewCallback mCustomViewCallback;
    private int mOriginalOrientation;

    private FrameLayout mFullscreenContainer;

    private final FrameLayout.LayoutParams COVER_SCREEN_PARAMS = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);


    @Override
    public void onShowCustomView(View view, CustomViewCallback callback) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            if (mCustomView != null) {
                callback.onCustomViewHidden();
                return;
            }

            mOriginalOrientation = ((Activity)context).getRequestedOrientation();
            FrameLayout decor = (FrameLayout) ((Activity)context).getWindow().getDecorView();
            mFullscreenContainer = new FullscreenHolder(context);
            mFullscreenContainer.addView(view, COVER_SCREEN_PARAMS);
            decor.addView(mFullscreenContainer, COVER_SCREEN_PARAMS);
            mCustomView = view;
            setFullscreen(true);
            mCustomViewCallback = callback;
//          mActivity.setRequestedOrientation(requestedOrientation);
        }

        super.onShowCustomView(view, callback);
    }

    @SuppressWarnings("deprecation")
    @Override
    public void onShowCustomView(View view, int requestedOrientation, WebChromeClient.CustomViewCallback callback) {
        this.onShowCustomView(view, callback);
    }

    @Override
    public void onHideCustomView() {
        if (mCustomView == null) {
            return;
        }

        setFullscreen(false);
        FrameLayout decor = (FrameLayout) ((Activity)context).getWindow().getDecorView();
        decor.removeView(mFullscreenContainer);
        mFullscreenContainer = null;
        mCustomView = null;
        mCustomViewCallback.onCustomViewHidden();
        ((Activity)context).setRequestedOrientation(mOriginalOrientation);
    }

    private void setFullscreen(boolean enabled) {
        Window win = ((Activity)context).getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        final int bits = WindowManager.LayoutParams.FLAG_FULLSCREEN;
        if (enabled) {
            winParams.flags |= bits;
        } else {
            winParams.flags &= ~bits;
            if (mCustomView != null) {
                mCustomView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
            }
        }
        win.setAttributes(winParams);
    }

    class FullscreenHolder extends FrameLayout {
        public FullscreenHolder(Context ctx) {
            super(ctx);
            setBackgroundColor(ContextCompat.getColor(ctx, android.R.color.black));
        }

        @Override
        public boolean onTouchEvent(MotionEvent evt) {
            return true;
        }
    }

https://github.com/sunandan89/opendatakit.survey/blob/0901aa19a9706f1869ad3f4d8053b117274ab599/src/org/opendatakit/survey/android/views/ODKWebChromeClient.java