Android: Add enablers for listening to activity results

When you launch an activity through an intent,
data can be provided back from the activity when it has finished
using onActivityResult() in the activity which launched it.

This is okay for applications, since they can easily create their
own activities, but does not work for libraries that need to
use intents. There is no listener API for activity results which
allow external classes to eavesdrop.

In order to support launching intents from third-party or add-on
libraries, we provide a low-level way to hook into the activity
result event. The corresponding public API will be added to
QtAndroidExtras.

Change-Id: I89417f485e2c0e69028dcccc7c155788346a7417
Reviewed-by: Christian Stromme <christian.stromme@digia.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/corelib/kernel/qjnihelpers_p.h b/src/corelib/kernel/qjnihelpers_p.h
index ff828ac870..6d0d65f489 100644
--- a/src/corelib/kernel/qjnihelpers_p.h
+++ b/src/corelib/kernel/qjnihelpers_p.h
@@ -60,11 +60,22 @@ QT_BEGIN_NAMESPACE
 
 namespace QtAndroidPrivate
 {
+    class Q_CORE_EXPORT ActivityResultListener
+    {
+    public:
+        virtual ~ActivityResultListener() {}
+        virtual bool handleActivityResult(jint requestCode, jint resultCode, jobject data) = 0;
+    };
+
     Q_CORE_EXPORT jobject activity();
     Q_CORE_EXPORT JavaVM *javaVM();
     Q_CORE_EXPORT jint initJNI(JavaVM *vm, JNIEnv *env);
     jobject classLoader();
     Q_CORE_EXPORT jint androidSdkVersion();
+
+    Q_CORE_EXPORT void handleActivityResult(jint requestCode, jint resultCode, jobject data);
+    Q_CORE_EXPORT void registerActivityResultListener(ActivityResultListener *listener);
+    Q_CORE_EXPORT void unregisterActivityResultListener(ActivityResultListener *listener);
 }
 
 QT_END_NAMESPACE