Re: [chromium-dev] Implementing Media Session in Android System Webview
Dale Curtis
Hi, I have been trying to implement media session in android system webview. So, my personal browser can use metadata and show on notification bar. I have been trying to use the file MediaSessionImpl.java in webview so it can use native file media_session.cc(Link). So, I have copy pasted the MediaSessionImpl.java (Link) in android_webview/java/src/org/chromium/android_webview/ and called MediaSessionImpl in AwContents.java(Link)
line written : MediaSessionImpl.fromWebContents(mWebContents);)Then I got error:No suggested deps for org.chromium.android_webview.MediaSessionImpl
No suggested deps for org.chromium.android_webview.MediaSessionImpl
../../android_webview/java/src/org/chromium/android_webview/AwContents.java:57: error: cannot find symbol
import org.chromium.android_webview.MediaSessionImpl;
^
symbol: class MediaSessionImpl
location: package org.chromium.android_webview
gen/android_webview/browser_java/generated_java/input_srcjars/org/chromium/android_webview/AwContentsJni.java:57: error: cannot find symbol
import org.chromium.android_webview.MediaSessionImpl;
^
symbol: class MediaSessionImpl
location: package org.chromium.android_webview
../../android_webview/java/src/org/chromium/android_webview/AwContents.java:1800: error: cannot find symbol
MediaSessionImpl.fromWebContents(mWebContents);
^
symbol: variable MediaSessionImpl
location: class AwContents
3 errors
ninja: build stopped: subcommand failed.Then I added these lines in BUILD.gn android_library("browser_java") { sources =["java/src/org/chromium/android_webview/MediaSessionImpl.java",
That issue got resolved and got new error:
import org.chromium.services.media_session.MediaMetadata;
^
../../android_webview/java/src/org/chromium/android_webview/MediaSessionImpl.java:158: error: could not resolve MediaMetadata
private void mediaSessionMetadataChanged(MediaMetadata metadata) {
^
../../android_webview/java/src/org/chromium/android_webview/MediaSessionImpl.java:17: error: symbol not found org.chromium.services.media_session.MediaImage
import org.chromium.services.media_session.MediaImage;
^
../../android_webview/java/src/org/chromium/android_webview/MediaSessionImpl.java:180: error: could not resolve MediaImage
private void mediaSessionArtworkChanged(MediaImage[] images) {
^
../../android_webview/java/src/org/chromium/android_webview/MediaSessionImpl.java:19: error: symbol not found org.chromium.services.media_session.MediaPosition
import org.chromium.services.media_session.MediaPosition;
^
../../android_webview/java/src/org/chromium/android_webview/MediaSessionImpl.java:189: error: could not resolve MediaPosition
private void mediaSessionPositionChanged(@Nullable MediaPosition position) {
^
Hint: One or more errors due to missing GN deps.
Hint: Try adding the following to //android_webview:browser_java
"//services/media_session/public/cpp/android:media_session_java",
Hint: Run the following command to add the missing deps:
build/gn_editor add --quiet --file android_webview/BUILD.gn --target //android_webview:browser_java --deps //services/media_session/public/cpp/android:media_session_java
ninja: build stopped: subcommand failed.Then I added these lines as hint suggested : BUILD.gn android_library("browser_java") { deps = [ :
"//services/media_session/public/cpp/android:media_session_java",
"//services/media_session/public/cpp/android:media_session_java",
That issue got resolved and got old error again:import org.chromium.android_webview.MediaSessionImpl;
^
symbol: class MediaSessionImpl
location: package org.chromium.android_webview
gen/android_webview/browser_java/generated_java/input_srcjars/org/chromium/android_webview/AwContentsJni.java:57: error: cannot find symbol
import org.chromium.android_webview.MediaSessionImpl;
^
symbol: class MediaSessionImpl
location: package org.chromium.android_webview
../../android_webview/java/src/org/chromium/android_webview/AwContents.java:1800: error: cannot find symbol
MediaSessionImpl.fromWebContents(mWebContents);
^
symbol: variable MediaSessionImpl
location: class AwContents
3 errors
Hint: One or more errors due to missing GN deps.
Hint: Try adding the following to //android_webview:browser_java
"one of: //android_webview:browser_java, //android_webview:android_webview_no_weblayer_java",
Hint: Run the following command to add the missing deps:
build/gn_editor add --quiet --file android_webview/BUILD.gn --target //android_webview:browser_java --deps //android_webview:browser_java
ninja: build stopped: subcommand failed.So I am stuck in a loop and if I try to use hint it give error:ninja: Entering directory `out/system_webview/'
[0/1] Regenerating ninja files
ERROR Dependency cycle:
//android_webview:android_webview_no_weblayer_java__build_config_crbug_908819 ->
//android_webview:browser_java__build_config_crbug_908819 ->
//android_webview:android_webview_no_weblayer_java__build_config_crbug_908819
FAILED: build.ninja.stamp
../../buildtools/linux64/gn --root=../.. -q --regeneration gen .
ninja: error: rebuilding 'build.ninja': subcommand failedI am confused why i getting an old error which i have resolved earlier and how can i resolve it again.--
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