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Android: Add convenience function to get the API level.

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It's common to check the Android API level at runtime to determine
what functionality is available. This change provides a convenient
way to get the Android SDK version (API level) from c++.

Change-Id: I88f65ae87e0fa8ac0affefffbd1b1bba855c9f46
Reviewed-by: BogDan Vatra <bogdan@kde.org>
This commit is contained in:
Christian Strømme 2014-01-08 14:06:38 +01:00 committed by The Qt Project
parent fd22e89593
commit 48db373ce3
2 changed files with 22 additions and 0 deletions
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21
src/corelib/kernel/qjnihelpers.cpp
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@ -46,6 +46,7 @@ QT_BEGIN_NAMESPACE
static JavaVM *g_javaVM = Q_NULLPTR;
static jobject g_jActivity = Q_NULLPTR;
static jobject g_jClassLoader = Q_NULLPTR;
static jint g_androidSdkVersion = 0;
static inline bool exceptionCheck(JNIEnv *env)
{
@ -60,6 +61,19 @@ static inline bool exceptionCheck(JNIEnv *env)
return false;
}
static void setAndroidSdkVersion(JNIEnv *env)
{
jclass androidVersionClass = env->FindClass("android/os/Build$VERSION");
if (exceptionCheck(env))
return;
jfieldID androidSDKFieldID = env->GetStaticFieldID(androidVersionClass, "SDK_INT", "I");
if (exceptionCheck(env))
return;
g_androidSdkVersion = env->GetStaticIntField(androidVersionClass, androidSDKFieldID);
}
jint QtAndroidPrivate::initJNI(JavaVM *vm, JNIEnv *env)
{
jclass jQtNative = env->FindClass("org/qtproject/qt5/android/QtNative");
@ -93,6 +107,8 @@ jint QtAndroidPrivate::initJNI(JavaVM *vm, JNIEnv *env)
if (exceptionCheck(env))
return JNI_ERR;
setAndroidSdkVersion(env);
g_jClassLoader = env->NewGlobalRef(classLoader);
env->DeleteLocalRef(classLoader);
g_jActivity = env->NewGlobalRef(activity);
@ -118,4 +134,9 @@ jobject QtAndroidPrivate::classLoader()
return g_jClassLoader;
}
jint QtAndroidPrivate::androidSdkVersion()
{
return g_androidSdkVersion;
}
QT_END_NAMESPACE

1
src/corelib/kernel/qjnihelpers_p.h
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@ -64,6 +64,7 @@ namespace QtAndroidPrivate
Q_CORE_EXPORT JavaVM *javaVM();
Q_CORE_EXPORT jint initJNI(JavaVM *vm, JNIEnv *env);
jobject classLoader();
jint androidSdkVersion();
}
QT_END_NAMESPACE