[Android] Give host application a chance to take over MediaPlayer

Give the host application a chance to take over the control when a new
media is about to be played in the current XWalkViewInternal

BUG=XWALK-6770

runtime/android/core_internal/src/org/xwalk/core/internal/XWalkContent.java

@@ -133,7 +133,7 @@ public XWalkContent(Context context, AttributeSet attrs, XWalkViewInternal xwVie
         mGeolocationPermissions = new XWalkGeolocationPermissions(sharedPreferences);
 
         MediaPlayerBridge.setResourceLoadingFilter(
-                new XWalkMediaPlayerResourceLoadingFilter());
+                new XWalkMediaPlayerResourceLoadingFilter(mContentsClientBridge));
 
         setNativeContent(nativeInit());
 

runtime/android/core_internal/src/org/xwalk/core/internal/XWalkContentsClient.java

@@ -5,12 +5,15 @@
 
 package org.xwalk.core.internal;
 
+import android.content.Context;
 import android.content.pm.ActivityInfo;
+import android.media.MediaPlayer;
 import android.graphics.Bitmap;
 import android.graphics.Picture;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.net.http.SslError;
+import android.net.Uri;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
@@ -23,6 +26,7 @@
 import java.security.PrivateKey;
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.Map;
 
 import org.chromium.content.browser.ContentViewClient;
 import org.chromium.content_public.browser.WebContents;
@@ -171,6 +175,9 @@ public abstract XWalkWebResourceResponseInternal shouldInterceptRequest(
 
     public abstract boolean shouldOverrideUrlLoading(String url);
 
+    public abstract boolean shouldOverrideMediaPlaying(MediaPlayer mediaPlayer,
+            Context context, Uri uri, Map<String, String> headers);
+
     public abstract void onUnhandledKeyEvent(KeyEvent event);
 
     public abstract boolean onConsoleMessage(ConsoleMessage consoleMessage);

runtime/android/core_internal/src/org/xwalk/core/internal/XWalkContentsClientBridge.java

@@ -7,10 +7,12 @@
 
 import android.content.ActivityNotFoundException;
 import android.content.ContentResolver;
+import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.Picture;
+import android.media.MediaPlayer;
 import android.net.Uri;
 import android.net.http.SslCertificate;
 import android.net.http.SslError;
@@ -210,6 +212,16 @@ public boolean shouldOverrideUrlLoading(String url) {
         return false;
     }
 
+    @Override
+    public boolean shouldOverrideMediaPlaying(MediaPlayer mediaPlayer,
+            Context context, Uri uri, Map<String, String> headers) {
+        if (mXWalkResourceClient != null && mXWalkView != null) {
+            return mXWalkResourceClient.shouldOverrideMediaPlaying(mXWalkView,
+                    mediaPlayer, context, uri, headers);
+        }
+        return false;
+    }
+
     @Override
     public boolean shouldOverrideKeyEvent(KeyEvent event) {
         boolean overridden = false;

runtime/android/core_internal/src/org/xwalk/core/internal/XWalkMediaPlayerResourceLoadingFilter.java

@@ -12,6 +12,7 @@
 import org.chromium.media.MediaPlayerBridge;
 
 import java.io.File;
+import java.util.Map;
 import java.util.HashMap;
 import java.util.List;
 
@@ -22,27 +23,34 @@
 
 class XWalkMediaPlayerResourceLoadingFilter extends
         MediaPlayerBridge.ResourceLoadingFilter {
+    private XWalkContentsClientBridge mContentsClientBridge;
+
+    XWalkMediaPlayerResourceLoadingFilter(XWalkContentsClientBridge clientBridge) {
+        mContentsClientBridge = clientBridge;
+    }
+
     @Override
     public boolean shouldOverrideResourceLoading(MediaPlayer mediaPlayer,
-            Context context, Uri uri) {
+            Context context, Uri uri, Map<String, String> headers) {
         String scheme = uri.getScheme();
         if (scheme == null) return false;
         if (scheme.equals(AndroidProtocolHandler.APP_SCHEME)) {
             uri = AndroidProtocolHandler.appUriToFileUri(uri);
         }
 
         scheme = uri.getScheme();
-        if (!scheme.equals(AndroidProtocolHandler.FILE_SCHEME)) return false;
-
-        try {
-            AssetFileDescriptor afd =
-                    context.getAssets().openFd(AndroidProtocolHandler.getAssetPath(uri));
-            mediaPlayer.setDataSource(
-                    afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
-
-            return true;
-        } catch (Exception e) {
-            return false;
+        if (scheme.equals(AndroidProtocolHandler.FILE_SCHEME)) {
+            try {
+                AssetFileDescriptor afd =
+                        context.getAssets().openFd(AndroidProtocolHandler.getAssetPath(uri));
+                mediaPlayer.setDataSource(
+                        afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
+                return true;
+            } catch (Exception e) {
+                return false;
+            }
         }
+
+        return mContentsClientBridge.shouldOverrideMediaPlaying(mediaPlayer, context, uri, headers);
     }
 }

runtime/android/core_internal/src/org/xwalk/core/internal/XWalkResourceClientInternal.java

@@ -8,7 +8,9 @@
 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
+import android.media.MediaPlayer;
 import android.net.http.SslError;
+import android.net.Uri;
 import android.os.Build;
 import android.text.InputType;
 import android.util.Log;
@@ -260,6 +262,26 @@ public boolean shouldOverrideUrlLoading(XWalkViewInternal view, String url) {
         return false;
     }
 
+    /**
+     * Give the host application a chance to take over the control when a new
+     * media is about to be played in the current XWalkViewInternal.
+     *
+     * @param view The XWalkViewInternal that is initiating the callback.
+     * @param mediaPalyer The android system services.
+     * @param context The context to use when resolving the Uri.
+     * @param uri Tthe Content URI of data you want to play
+     * @param header The headers to be sent together with the request for the data Note
+     *        that the cross domain redirection is allowed by default.
+     * @return True if the host application wants to play itself, otherwise return false.
+     *
+     * @since 6.0
+     */
+    @XWalkAPI
+    public boolean shouldOverrideMediaPlaying(XWalkViewInternal view,
+            MediaPlayer mediaPlayer, Context context, Uri uri, Map<String, String> headers) {
+        return false;
+    }
+
     /**
       * Notify the host application that an SSL error occurred while loading a
       * resource. The host application must call either callback.onReceiveValue(true)