无法在自定义 Webview 中全屏显示 Youtube 视频

Question

更新

我已更新我的问题以隐藏机密代码。

如果仍然有一些困惑，请在评论中给我留言。

题

我编写了一个自定义 Webview，用于播放嵌入在我网站中的 youtube 视频以全屏显示。

但它仍然无法正常工作... 请帮助

   public class MainActivity extends Activity  implements OnClickListener {

          final Context context = this;
        private WebView webView;
         private ImageButton btnrefresh;    
         private TextView txtrefresh;
           private myWebChromeClient mWebChromeClient;
         private Menu optionsMenu;
         private WebChromeClient.CustomViewCallback customViewCallback;
            private View mCustomView;       
            private FrameLayout customViewContainer;


        @SuppressWarnings("deprecation")
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            //Tushar
              customViewContainer = (FrameLayout) findViewById(R.id.customViewContainer);
            //Tushar
            //define button 
            btnrefresh = (ImageButton) findViewById(R.id.imageButton1);

            btnrefresh.setOnClickListener(this);
            btnrefresh.setVisibility(View.GONE);

            //define textView
            txtrefresh = (TextView)findViewById((R.id.textView1));
            txtrefresh.setVisibility(View.GONE);


            if(isConnected())
            {

                webView = (WebView) findViewById(R.id.webView1);
                webView.getSettings().setJavaScriptEnabled(true);       
                   webView.getSettings().setAppCacheEnabled(true);

                    webView.getSettings().setRenderPriority(RenderPriority.HIGH);
                    webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
                    webView.getSettings().setSaveFormData(true);
            //  webView.getSettings().setPluginState(PluginState.ON);
              webView.setWebViewClient(new WebViewClient()
              {
              @Override
              public boolean shouldOverrideUrlLoading(WebView view, String url) {


                  if (url.startsWith("mailto:")) {
                      sendEmail(url.substring(7));
                      return true;
                  }

                  return false;
              }

            });


                initWebView(webView);                         
                webView.loadUrl("http://Example.com/");             

                }


            else
            {

            RelativeLayout rel = (RelativeLayout)findViewById(R.id.relativelayout1);
            rel.setOnClickListener(new View.OnClickListener(){
               @Override
               public void onClick(View v){
                 refresh();
               }
           });
                btnrefresh.setVisibility(View.VISIBLE); 
                txtrefresh.setVisibility(View.VISIBLE);
                Toast.makeText(getBaseContext(), "No Internet Connection !!", Toast.LENGTH_SHORT).show();


            }       
        }

        public boolean inCustomView() {
            return (mCustomView != null);
        }

        public void hideCustomView() {
            mWebChromeClient.onHideCustomView();
        }

        @Override
        protected void onPause() {
            super.onPause();    //To change body of overridden methods use File | Settings | File Templates.
            webView.onPause();
        }

        @Override
        protected void onResume() {
            super.onResume();    //To change body of overridden methods use File | Settings | File Templates.
            webView.onResume();
        }

        @Override
        protected void onStop() {
            super.onStop();    //To change body of overridden methods use File | Settings | File Templates.
            if (inCustomView()) {
                hideCustomView();
            }
        }

        //tushar
        class myWebChromeClient extends WebChromeClient {
            private Bitmap mDefaultVideoPoster;
            private View mVideoProgressView;

            @Override
            public void onShowCustomView(View view, int requestedOrientation, CustomViewCallback callback) {
               onShowCustomView(view, callback);    //To change body of overridden methods use File | Settings | File Templates.
            }

            @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;
                }
                mCustomView = view;
                webView.setVisibility(View.GONE);
                customViewContainer.setVisibility(View.VISIBLE);
                customViewContainer.addView(view);
                customViewCallback = callback;
            }

            @Override
            public View getVideoLoadingProgressView() {

                if (mVideoProgressView == null) {
                    LayoutInflater inflater = LayoutInflater.from(MainActivity.this);
                    mVideoProgressView = inflater.inflate(R.layout.video_progress, null);
                }
                return mVideoProgressView;
            }

            @Override
            public void onHideCustomView() {
                super.onHideCustomView();    //To change body of overridden methods use File | Settings | File Templates.
                if (mCustomView == null)
                    return;

                webView.setVisibility(View.VISIBLE);
                customViewContainer.setVisibility(View.GONE);

                // Hide the custom view.
                mCustomView.setVisibility(View.GONE);

                // Remove the custom view from its container.
                customViewContainer.removeView(mCustomView);
                customViewCallback.onCustomViewHidden();

                mCustomView = null;
            }
        }

Answer 1

为了实现这一目标，您应该：

1. 的实现showCustomView和hideCustomView方法WebChromeClient。
2. 设置android:hardwareAccelerated="true"为您的MainActivityin AndroidManifest.xml.

您的代码中有两个类继承了WebChromeClient(myWebChromeClient和MyWebChromeClient)。第一个实现showCustomView和hideCustomView方法似乎完全适用于全屏视频。第二个则不然。但是您（不小心？）将第二个设置为WebChromeClient您的WebView.

要解决此问题，只需更改该行

webView.setWebChromeClient(new MyWebChromeClient());

到

mWebChromeClient = new myWebChromeClient();
webView.setWebChromeClient(mWebChromeClient);

在你的initWebView()方法中。

更新：

要在正常（非全屏）模式下锁定纵向onHideCustomView()方向，请将以下行添加到方法中：

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

要让系统决定全屏模式下的最佳方向，请将此行添加到onShowCustomView(View view, CustomViewCallback callback)方法中：

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);