Android: Don't close camera when recording permission is asked

If camera permission is granted and recording is requested
it also requires recording audio permission.
If it was not granted before the popup will be shown
to ask the user to grant the permission
and the app goes to inactive state,
which destroys the camera handlers.

When the camera is loaded but the app requires additional permissions,
it should not destroy the camera.

Change-Id: Iee3662a7ac3381b0eb29190779b0116f9f64304f
Fixes: QTBUG-79909
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

3 files changed, 16 insertions, 3 deletions

diff --git a/src/plugins/android/src/mediacapture/qandroidcamerasession.cpp b/src/plugins/android/src/mediacapture/qandroidcamerasession.cpp
index 6a30e5300..9de3330c7 100644
--- a/src/plugins/android/src/mediacapture/qandroidcamerasession.cpp
+++ b/src/plugins/android/src/mediacapture/qandroidcamerasession.cpp
@@ -78,6 +78,7 @@ QAndroidCameraSession::QAndroidCameraSession(QObject *parent)
     , m_captureCanceled(false)
     , m_currentImageCaptureId(-1)
     , m_previewCallback(0)
+    , m_keepActive(false)
 {
     m_mediaStorageLocation.addStorageLocation(
                 QMediaStorageLocation::Pictures,
@@ -913,7 +914,7 @@ void QAndroidCameraSession::onApplicationStateChanged(Qt::ApplicationState state
 {
     switch (state) {
     case Qt::ApplicationInactive:
-        if (m_state != QCamera::UnloadedState) {
+        if (!m_keepActive && m_state != QCamera::UnloadedState) {
             m_savedState = m_state;
             close();
             m_state = QCamera::UnloadedState;
@@ -931,4 +932,12 @@ void QAndroidCameraSession::onApplicationStateChanged(Qt::ApplicationState state
     }
 }
 
+bool QAndroidCameraSession::requestRecordingPermission()
+{
+    m_keepActive = true;
+    const bool result = qt_androidRequestRecordingPermission();
+    m_keepActive = false;
+    return result;
+}
+
 QT_END_NAMESPACE
diff --git a/src/plugins/android/src/mediacapture/qandroidcamerasession.h b/src/plugins/android/src/mediacapture/qandroidcamerasession.h
index b51dcc628..728dc484e 100644
--- a/src/plugins/android/src/mediacapture/qandroidcamerasession.h
+++ b/src/plugins/android/src/mediacapture/qandroidcamerasession.h
@@ -112,6 +112,7 @@ public:
         virtual void onFrameAvailable(const QVideoFrame &frame) = 0;
     };
     void setPreviewCallback(PreviewCallback *callback);
+    bool requestRecordingPermission();
 
 Q_SIGNALS:
     void statusChanged(QCamera::Status status);
@@ -196,6 +197,7 @@ private:
     QSet<QAndroidMediaVideoProbeControl *> m_videoProbes;
     QMutex m_videoProbesMutex;
     PreviewCallback *m_previewCallback;
+    bool m_keepActive;
 };
 
 QT_END_NAMESPACE
diff --git a/src/plugins/android/src/mediacapture/qandroidcapturesession.cpp b/src/plugins/android/src/mediacapture/qandroidcapturesession.cpp
index bc9bc983e..7cc3ad619 100644
--- a/src/plugins/android/src/mediacapture/qandroidcapturesession.cpp
+++ b/src/plugins/android/src/mediacapture/qandroidcapturesession.cpp
@@ -206,8 +206,10 @@ void QAndroidCaptureSession::start()
         delete m_mediaRecorder;
     }
 
-
-    if (!AndroidMediaRecorder::requestRecordingPermission()) {
+    const bool granted = m_cameraSession
+                       ? m_cameraSession->requestRecordingPermission()
+                       : qt_androidRequestRecordingPermission();
+    if (!granted) {
         setStatus(QMediaRecorder::UnavailableStatus);
         Q_EMIT error(QMediaRecorder::ResourceError, QLatin1String("Permission denied."));
         return;