Chỉnh sửa 2014/10: theo nhu cầu phổ biến, tôi đang duy trì và chuyển nó sang GitHub. Vui lòng kiểm tra cprcrack / VideoEnabledWebView để biết phiên bản mới nhất. Sẽ giữ câu trả lời này chỉ để tham khảo.
Chỉnh sửa 2014/01: cải thiện việc sử dụng ví dụ để bao gồm các chế độ xem nonVideoLayout, videoLayout và videoLoading, dành cho những người dùng yêu cầu thêm mã mẫu để hiểu rõ hơn.
Chỉnh sửa 2013/12: một số bản sửa lỗi liên quan đến khả năng tương thích của thiết bị Sony Xperia, nhưng thực tế đã ảnh hưởng đến tất cả các thiết bị.
Chỉnh sửa 2013/11: sau khi phát hành Android 4.4 KitKat (API cấp 19) với chế độ xem web Chromium mới, tôi đã phải làm việc chăm chỉ lại. Một số cải tiến đã được thực hiện. Bạn nên cập nhật phiên bản mới này. Tôi phát hành nguồn này dưới WTFPL .
Chỉnh sửa 2013/04: sau 1 tuần làm việc chăm chỉ, cuối cùng tôi đã đạt được mọi thứ mình cần. Tôi nghĩ rằng hai lớp chung này mà tôi đã tạo có thể giải quyết tất cả các vấn đề của bạn.
VideoEnabledWebChromeClientcó thể được sử dụng một mình nếu bạn không yêu cầu chức năng VideoEnabledWebViewbổ sung. Nhưng VideoEnabledWebViewphải luôn dựa vào a VideoEnabledWebChromeClient. Vui lòng đọc kỹ tất cả các bình luận của cả hai lớp.
Lớp VideoEnabledWebChromeClient
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.MediaPlayer.OnPreparedListener;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.webkit.WebChromeClient;
import android.widget.FrameLayout;
/**
* This class serves as a WebChromeClient to be set to a WebView, allowing it to play video.
* Video will play differently depending on target API level (in-line, fullscreen, or both).
*
* It has been tested with the following video classes:
* - android.widget.VideoView (typically API level <11)
* - android.webkit.HTML5VideoFullScreen$VideoSurfaceView/VideoTextureView (typically API level 11-18)
* - com.android.org.chromium.content.browser.ContentVideoView$VideoSurfaceView (typically API level 19+)
*
* Important notes:
* - For API level 11+, android:hardwareAccelerated="true" must be set in the application manifest.
* - The invoking activity must call VideoEnabledWebChromeClient's onBackPressed() inside of its own onBackPressed().
* - Tested in Android API levels 8-19. Only tested on http://m.youtube.com.
*
* @author Cristian Perez (http://cpr.name)
*
*/
public class VideoEnabledWebChromeClient extends WebChromeClient implements OnPreparedListener, OnCompletionListener, OnErrorListener
{
public interface ToggledFullscreenCallback
{
public void toggledFullscreen(boolean fullscreen);
}
private View activityNonVideoView;
private ViewGroup activityVideoView;
private View loadingView;
private VideoEnabledWebView webView;
private boolean isVideoFullscreen; // Indicates if the video is being displayed using a custom view (typically full-screen)
private FrameLayout videoViewContainer;
private CustomViewCallback videoViewCallback;
private ToggledFullscreenCallback toggledFullscreenCallback;
/**
* Never use this constructor alone.
* This constructor allows this class to be defined as an inline inner class in which the user can override methods
*/
@SuppressWarnings("unused")
public VideoEnabledWebChromeClient()
{
}
/**
* Builds a video enabled WebChromeClient.
* @param activityNonVideoView A View in the activity's layout that contains every other view that should be hidden when the video goes full-screen.
* @param activityVideoView A ViewGroup in the activity's layout that will display the video. Typically you would like this to fill the whole layout.
*/
@SuppressWarnings("unused")
public VideoEnabledWebChromeClient(View activityNonVideoView, ViewGroup activityVideoView)
{
this.activityNonVideoView = activityNonVideoView;
this.activityVideoView = activityVideoView;
this.loadingView = null;
this.webView = null;
this.isVideoFullscreen = false;
}
/**
* Builds a video enabled WebChromeClient.
* @param activityNonVideoView A View in the activity's layout that contains every other view that should be hidden when the video goes full-screen.
* @param activityVideoView A ViewGroup in the activity's layout that will display the video. Typically you would like this to fill the whole layout.
* @param loadingView A View to be shown while the video is loading (typically only used in API level <11). Must be already inflated and without a parent view.
*/
@SuppressWarnings("unused")
public VideoEnabledWebChromeClient(View activityNonVideoView, ViewGroup activityVideoView, View loadingView)
{
this.activityNonVideoView = activityNonVideoView;
this.activityVideoView = activityVideoView;
this.loadingView = loadingView;
this.webView = null;
this.isVideoFullscreen = false;
}
/**
* Builds a video enabled WebChromeClient.
* @param activityNonVideoView A View in the activity's layout that contains every other view that should be hidden when the video goes full-screen.
* @param activityVideoView A ViewGroup in the activity's layout that will display the video. Typically you would like this to fill the whole layout.
* @param loadingView A View to be shown while the video is loading (typically only used in API level <11). Must be already inflated and without a parent view.
* @param webView The owner VideoEnabledWebView. Passing it will enable the VideoEnabledWebChromeClient to detect the HTML5 video ended event and exit full-screen.
* Note: The web page must only contain one video tag in order for the HTML5 video ended event to work. This could be improved if needed (see Javascript code).
*/
public VideoEnabledWebChromeClient(View activityNonVideoView, ViewGroup activityVideoView, View loadingView, VideoEnabledWebView webView)
{
this.activityNonVideoView = activityNonVideoView;
this.activityVideoView = activityVideoView;
this.loadingView = loadingView;
this.webView = webView;
this.isVideoFullscreen = false;
}
/**
* Indicates if the video is being displayed using a custom view (typically full-screen)
* @return true it the video is being displayed using a custom view (typically full-screen)
*/
public boolean isVideoFullscreen()
{
return isVideoFullscreen;
}
/**
* Set a callback that will be fired when the video starts or finishes displaying using a custom view (typically full-screen)
* @param callback A VideoEnabledWebChromeClient.ToggledFullscreenCallback callback
*/
public void setOnToggledFullscreen(ToggledFullscreenCallback callback)
{
this.toggledFullscreenCallback = callback;
}
@Override
public void onShowCustomView(View view, CustomViewCallback callback)
{
if (view instanceof FrameLayout)
{
// A video wants to be shown
FrameLayout frameLayout = (FrameLayout) view;
View focusedChild = frameLayout.getFocusedChild();
// Save video related variables
this.isVideoFullscreen = true;
this.videoViewContainer = frameLayout;
this.videoViewCallback = callback;
// Hide the non-video view, add the video view, and show it
activityNonVideoView.setVisibility(View.INVISIBLE);
activityVideoView.addView(videoViewContainer, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
activityVideoView.setVisibility(View.VISIBLE);
if (focusedChild instanceof android.widget.VideoView)
{
// android.widget.VideoView (typically API level <11)
android.widget.VideoView videoView = (android.widget.VideoView) focusedChild;
// Handle all the required events
videoView.setOnPreparedListener(this);
videoView.setOnCompletionListener(this);
videoView.setOnErrorListener(this);
}
else
{
// Other classes, including:
// - android.webkit.HTML5VideoFullScreen$VideoSurfaceView, which inherits from android.view.SurfaceView (typically API level 11-18)
// - android.webkit.HTML5VideoFullScreen$VideoTextureView, which inherits from android.view.TextureView (typically API level 11-18)
// - com.android.org.chromium.content.browser.ContentVideoView$VideoSurfaceView, which inherits from android.view.SurfaceView (typically API level 19+)
// Handle HTML5 video ended event only if the class is a SurfaceView
// Test case: TextureView of Sony Xperia T API level 16 doesn't work fullscreen when loading the javascript below
if (webView != null && webView.getSettings().getJavaScriptEnabled() && focusedChild instanceof SurfaceView)
{
// Run javascript code that detects the video end and notifies the Javascript interface
String js = "javascript:";
js += "var _ytrp_html5_video_last;";
js += "var _ytrp_html5_video = document.getElementsByTagName('video')[0];";
js += "if (_ytrp_html5_video != undefined && _ytrp_html5_video != _ytrp_html5_video_last) {";
{
js += "_ytrp_html5_video_last = _ytrp_html5_video;";
js += "function _ytrp_html5_video_ended() {";
{
js += "_VideoEnabledWebView.notifyVideoEnd();"; // Must match Javascript interface name and method of VideoEnableWebView
}
js += "}";
js += "_ytrp_html5_video.addEventListener('ended', _ytrp_html5_video_ended);";
}
js += "}";
webView.loadUrl(js);
}
}
// Notify full-screen change
if (toggledFullscreenCallback != null)
{
toggledFullscreenCallback.toggledFullscreen(true);
}
}
}
@Override @SuppressWarnings("deprecation")
public void onShowCustomView(View view, int requestedOrientation, CustomViewCallback callback) // Available in API level 14+, deprecated in API level 18+
{
onShowCustomView(view, callback);
}
@Override
public void onHideCustomView()
{
// This method should be manually called on video end in all cases because it's not always called automatically.
// This method must be manually called on back key press (from this class' onBackPressed() method).
if (isVideoFullscreen)
{
// Hide the video view, remove it, and show the non-video view
activityVideoView.setVisibility(View.INVISIBLE);
activityVideoView.removeView(videoViewContainer);
activityNonVideoView.setVisibility(View.VISIBLE);
// Call back (only in API level <19, because in API level 19+ with chromium webview it crashes)
if (videoViewCallback != null && !videoViewCallback.getClass().getName().contains(".chromium."))
{
videoViewCallback.onCustomViewHidden();
}
// Reset video related variables
isVideoFullscreen = false;
videoViewContainer = null;
videoViewCallback = null;
// Notify full-screen change
if (toggledFullscreenCallback != null)
{
toggledFullscreenCallback.toggledFullscreen(false);
}
}
}
@Override
public View getVideoLoadingProgressView() // Video will start loading
{
if (loadingView != null)
{
loadingView.setVisibility(View.VISIBLE);
return loadingView;
}
else
{
return super.getVideoLoadingProgressView();
}
}
@Override
public void onPrepared(MediaPlayer mp) // Video will start playing, only called in the case of android.widget.VideoView (typically API level <11)
{
if (loadingView != null)
{
loadingView.setVisibility(View.GONE);
}
}
@Override
public void onCompletion(MediaPlayer mp) // Video finished playing, only called in the case of android.widget.VideoView (typically API level <11)
{
onHideCustomView();
}
@Override
public boolean onError(MediaPlayer mp, int what, int extra) // Error while playing video, only called in the case of android.widget.VideoView (typically API level <11)
{
return false; // By returning false, onCompletion() will be called
}
/**
* Notifies the class that the back key has been pressed by the user.
* This must be called from the Activity's onBackPressed(), and if it returns false, the activity itself should handle it. Otherwise don't do anything.
* @return Returns true if the event was handled, and false if was not (video view is not visible)
*/
public boolean onBackPressed()
{
if (isVideoFullscreen)
{
onHideCustomView();
return true;
}
else
{
return false;
}
}
}
Lớp VideoEnabledWebView
import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Handler;
import android.os.Looper;
import android.util.AttributeSet;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import java.util.Map;
/**
* This class serves as a WebView to be used in conjunction with a VideoEnabledWebChromeClient.
* It makes possible:
* - To detect the HTML5 video ended event so that the VideoEnabledWebChromeClient can exit full-screen.
*
* Important notes:
* - Javascript is enabled by default and must not be disabled with getSettings().setJavaScriptEnabled(false).
* - setWebChromeClient() must be called before any loadData(), loadDataWithBaseURL() or loadUrl() method.
*
* @author Cristian Perez (http://cpr.name)
*
*/
public class VideoEnabledWebView extends WebView
{
public class JavascriptInterface
{
@android.webkit.JavascriptInterface
public void notifyVideoEnd() // Must match Javascript interface method of VideoEnabledWebChromeClient
{
// This code is not executed in the UI thread, so we must force that to happen
new Handler(Looper.getMainLooper()).post(new Runnable()
{
@Override
public void run()
{
if (videoEnabledWebChromeClient != null)
{
videoEnabledWebChromeClient.onHideCustomView();
}
}
});
}
}
private VideoEnabledWebChromeClient videoEnabledWebChromeClient;
private boolean addedJavascriptInterface;
public VideoEnabledWebView(Context context)
{
super(context);
addedJavascriptInterface = false;
}
@SuppressWarnings("unused")
public VideoEnabledWebView(Context context, AttributeSet attrs)
{
super(context, attrs);
addedJavascriptInterface = false;
}
@SuppressWarnings("unused")
public VideoEnabledWebView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
addedJavascriptInterface = false;
}
/**
* Indicates if the video is being displayed using a custom view (typically full-screen)
* @return true it the video is being displayed using a custom view (typically full-screen)
*/
public boolean isVideoFullscreen()
{
return videoEnabledWebChromeClient != null && videoEnabledWebChromeClient.isVideoFullscreen();
}
/**
* Pass only a VideoEnabledWebChromeClient instance.
*/
@Override @SuppressLint("SetJavaScriptEnabled")
public void setWebChromeClient(WebChromeClient client)
{
getSettings().setJavaScriptEnabled(true);
if (client instanceof VideoEnabledWebChromeClient)
{
this.videoEnabledWebChromeClient = (VideoEnabledWebChromeClient) client;
}
super.setWebChromeClient(client);
}
@Override
public void loadData(String data, String mimeType, String encoding)
{
addJavascriptInterface();
super.loadData(data, mimeType, encoding);
}
@Override
public void loadDataWithBaseURL(String baseUrl, String data, String mimeType, String encoding, String historyUrl)
{
addJavascriptInterface();
super.loadDataWithBaseURL(baseUrl, data, mimeType, encoding, historyUrl);
}
@Override
public void loadUrl(String url)
{
addJavascriptInterface();
super.loadUrl(url);
}
@Override
public void loadUrl(String url, Map<String, String> additionalHttpHeaders)
{
addJavascriptInterface();
super.loadUrl(url, additionalHttpHeaders);
}
private void addJavascriptInterface()
{
if (!addedJavascriptInterface)
{
// Add javascript interface to be called when the video ends (must be done before page load)
addJavascriptInterface(new JavascriptInterface(), "_VideoEnabledWebView"); // Must match Javascript interface name of VideoEnabledWebChromeClient
addedJavascriptInterface = true;
}
}
}
Ví dụ sử dụng:
Bố cục chính activity_main.xml trong đó chúng tôi đặt VideoEnabledWebView và các chế độ xem đã sử dụng khác:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<!-- View that will be hidden when video goes fullscreen -->
<RelativeLayout
android:id="@+id/nonVideoLayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<your.package.VideoEnabledWebView
android:id="@+id/webView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
<!-- View where the video will be shown when video goes fullscreen -->
<RelativeLayout
android:id="@+id/videoLayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<!-- View that will be shown while the fullscreen video loads (maybe include a spinner and a "Loading..." message) -->
<View
android:id="@+id/videoLoading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="invisible" />
</RelativeLayout>
</RelativeLayout>
Activity của onCreate () , trong đó chúng tôi khởi tạo nó:
private VideoEnabledWebView webView;
private VideoEnabledWebChromeClient webChromeClient;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// Set layout
setContentView(R.layout.activity_main);
// Save the web view
webView = (VideoEnabledWebView) findViewById(R.id.webView);
// Initialize the VideoEnabledWebChromeClient and set event handlers
View nonVideoLayout = findViewById(R.id.nonVideoLayout); // Your own view, read class comments
ViewGroup videoLayout = (ViewGroup) findViewById(R.id.videoLayout); // Your own view, read class comments
View loadingView = getLayoutInflater().inflate(R.layout.view_loading_video, null); // Your own view, read class comments
webChromeClient = new VideoEnabledWebChromeClient(nonVideoLayout, videoLayout, loadingView, webView) // See all available constructors...
{
// Subscribe to standard events, such as onProgressChanged()...
@Override
public void onProgressChanged(WebView view, int progress)
{
// Your code...
}
};
webChromeClient.setOnToggledFullscreen(new VideoEnabledWebChromeClient.ToggledFullscreenCallback()
{
@Override
public void toggledFullscreen(boolean fullscreen)
{
// Your code to handle the full-screen change, for example showing and hiding the title bar. Example:
if (fullscreen)
{
WindowManager.LayoutParams attrs = getWindow().getAttributes();
attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
attrs.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
getWindow().setAttributes(attrs);
if (android.os.Build.VERSION.SDK_INT >= 14)
{
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE);
}
}
else
{
WindowManager.LayoutParams attrs = getWindow().getAttributes();
attrs.flags &= ~WindowManager.LayoutParams.FLAG_FULLSCREEN;
attrs.flags &= ~WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
getWindow().setAttributes(attrs);
if (android.os.Build.VERSION.SDK_INT >= 14)
{
getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
}
}
}
});
webView.setWebChromeClient(webChromeClient);
// Navigate everywhere you want, this classes have only been tested on YouTube's mobile site
webView.loadUrl("http://m.youtube.com");
}
Và đừng quên gọi onBackPressed () :
@Override
public void onBackPressed()
{
// Notify the VideoEnabledWebChromeClient, and handle it ourselves if it doesn't handle it
if (!webChromeClient.onBackPressed())
{
if (webView.canGoBack())
{
webView.goBack();
}
else
{
// Close app (presumably)
super.onBackPressed();
}
}
}