QtAndroid Namespace

The QtAndroid namespace provides miscellaneous functions to aid Android development. More...

Header:	#include <QtAndroid>
qmake:	QT += androidextras
Since:	Qt 5.3

This namespace was introduced in Qt 5.3.

Types

enum	BindFlag { None, AutoCreate, DebugUnbind, NotForeground, AboveClient, …, ExternalService }
flags	BindFlags
enum	PermissionResult { Granted, Denied }
typedef	PermissionResultCallback
typedef	PermissionResultMap
typedef	Runnable

Functions

QAndroidJniObject	androidActivity()
QAndroidJniObject	androidContext()
int	androidSdkVersion()
QAndroidJniObject	androidService()
bool	bindService(const QAndroidIntent &serviceIntent, const QAndroidServiceConnection &serviceConnection, QtAndroid::BindFlags flags = ...)
QtAndroid::PermissionResult	checkPermission(const QString &permission)
void	hideSplashScreen()
void	hideSplashScreen(int duration)
void	requestPermissions(const QStringList &permissions, const QtAndroid::PermissionResultCallback &callbackFunc)
QtAndroid::PermissionResultMap	requestPermissionsSync(const QStringList &permissions, int timeoutMs = INT_MAX)
void	runOnAndroidThread(const QtAndroid::Runnable &runnable)
void	runOnAndroidThreadSync(const QtAndroid::Runnable &runnable, int timeoutMs = INT_MAX)
bool	shouldShowRequestPermissionRationale(const QString &permission)
void	startActivity(const QAndroidJniObject &intent, int receiverRequestCode, QAndroidActivityResultReceiver *resultReceiver = nullptr)
void	startActivity(const QAndroidIntent &intent, int receiverRequestCode, QAndroidActivityResultReceiver *resultReceiver = nullptr)
void	startActivity(const QAndroidJniObject &intent, int receiverRequestCode, std::function<void (int, int, const QAndroidJniObject &)> callbackFunc)
void	startIntentSender(const QAndroidJniObject &intentSender, int receiverRequestCode, QAndroidActivityResultReceiver *resultReceiver = nullptr)

Detailed Description

Type Documentation

enum QtAndroid::BindFlagflags QtAndroid::BindFlags

This enum is used with QtAndroid::bindService to describe the mode in which the binding is performed.

Constant	Value	Description
QtAndroid::None	0x00000000	No options.
QtAndroid::AutoCreate	0x00000001	Automatically creates the service as long as the binding exist. See BIND_AUTO_CREATE documentation for more details.
QtAndroid::DebugUnbind	0x00000002	Include debugging help for mismatched calls to unbind. See BIND_DEBUG_UNBIND documentation for more details.
QtAndroid::NotForeground	0x00000004	Don't allow this binding to raise the target service's process to the foreground scheduling priority. See BIND_NOT_FOREGROUND documentation for more details.
QtAndroid::AboveClient	0x00000008	Indicates that the client application binding to this service considers the service to be more important than the app itself. See BIND_ABOVE_CLIENT documentation for more details.
QtAndroid::AllowOomManagement	0x00000010	Allow the process hosting the bound service to go through its normal memory management. See BIND_ALLOW_OOM_MANAGEMENT documentation for more details.
QtAndroid::WaivePriority	0x00000020	Don't impact the scheduling or memory management priority of the target service's hosting process. See BIND_WAIVE_PRIORITY documentation for more details.
QtAndroid::Important	0x00000040	This service is assigned a higher priority so that it is available to the client when needed. See BIND_IMPORTANT documentation for more details.
QtAndroid::AdjustWithActivity	0x00000080	If binding from an activity, allow the target service's process importance to be raised based on whether the activity is visible to the user. See BIND_ADJUST_WITH_ACTIVITY documentation for more details.
QtAndroid::ExternalService	-2147483648	The service being bound is an isolated, external service. See BIND_EXTERNAL_SERVICE documentation for more details.

This enum was introduced or modified in Qt 5.10.

The BindFlags type is a typedef for QFlags<BindFlag>. It stores an OR combination of BindFlag values.

enum QtAndroid::PermissionResult

This enum is used to describe the permission status.

Constant	Value	Description
QtAndroid::Granted	0	The permission was granted.
QtAndroid::Denied	1	The permission was denied.

This enum was introduced or modified in Qt 5.10.

typedef QtAndroid::PermissionResultCallback

Synonym for std::function<void(const PermissionResultMap &)>.

typedef QtAndroid::PermissionResultMap

Synonym for QHash<QString, PermissionResult>.

typedef QtAndroid::Runnable

Synonym for std::function<void()>.

Function Documentation

QAndroidJniObject QtAndroid::androidActivity()

Returns a handle to this application's main Activity

This function was introduced in Qt 5.3.

See also QAndroidJniObject, androidService(), and androidContext().

QAndroidJniObject QtAndroid::androidContext()

Returns a handle to this application's main Context. Depending on the nature of the application the Context object is either the main Service or Activity object.

This function was introduced in Qt 5.8.

See also QAndroidJniObject, androidActivity(), and androidService().

int QtAndroid::androidSdkVersion()

Returns the Android SDK version. This is also known as the API level.

This function was introduced in Qt 5.3.

QAndroidJniObject QtAndroid::androidService()

Returns a handle to this application's main Service

This function was introduced in Qt 5.7.

See also QAndroidJniObject, androidActivity(), and androidContext().

bool QtAndroid::bindService(const QAndroidIntent &serviceIntent, const QAndroidServiceConnection &serviceConnection, QtAndroid::BindFlags flags = ...)

Binds the service given by serviceIntent, serviceConnection and flags. The serviceIntent object identifies the service to connect to. The serviceConnection is a listener that receives the information as the service is started and stopped.

Returns true on success

See Android documentation documentation for more details.

This function was introduced in Qt 5.10.

See also QAndroidIntent, QAndroidServiceConnection, and BindFlag.

QtAndroid::PermissionResult QtAndroid::checkPermission(const QString &permission)

Checks if the permission was granted or not. This function should be called every time when the application starts for needed permissions, as the users might disable them from Android Settings.

This function was introduced in Qt 5.10.

void QtAndroid::hideSplashScreen()

Hides the splash screen immediately.

This function was introduced in Qt 5.7.

void QtAndroid::hideSplashScreen(int duration)

Hides the splash screen, fading it for duration milliseconds.

This function was introduced in Qt 5.10.

void QtAndroid::requestPermissions(const QStringList &permissions, const QtAndroid::PermissionResultCallback &callbackFunc)

Asynchronously requests permissions to be granted to this application, callbackFunc will be called with the results.

This function was introduced in Qt 5.10.

QtAndroid::PermissionResultMap QtAndroid::requestPermissionsSync(const QStringList &permissions, int timeoutMs = INT_MAX)

Synchronously requests permissions to be granted to this application, waits timeoutMs to complete.

This function was introduced in Qt 5.10.

void QtAndroid::runOnAndroidThread(const QtAndroid::Runnable &runnable)

Posts the given runnable on the android thread. The runnable will be queued and executed on the Android UI thread, unless it called on the Android UI thread, in which case the runnable will be executed immediately.

This function is useful to set asynchronously properties of objects that must be set on on Android UI thread.

This function was introduced in Qt 5.7.

void QtAndroid::runOnAndroidThreadSync(const QtAndroid::Runnable &runnable, int timeoutMs = INT_MAX)

Posts the runnable on the Android UI thread and waits until the runnable is executed, or until timeoutMs has passed

This function is useful to create objects, or get properties on Android UI thread:

QAndroidJniObject javaControl;
QtAndroid::runOnAndroidThreadSync([&javaControl](){

    // create our Java control on Android UI thread.
    javaControl = QAndroidJniObject("android/webkit/WebView",
                                                "(Landroid/content/Context;)V",
                                                QtAndroid::androidActivity().object<jobject>());
    javaControl.callMethod<void>("setWebViewClient",
                                   "(Landroid/webkit/WebViewClient;)V",
                                   QAndroidJniObject("android/webkit/WebViewClient").object());
});

// Continue the execution normally
qDebug() << javaControl.isValid();

This function was introduced in Qt 5.7.

bool QtAndroid::shouldShowRequestPermissionRationale(const QString &permission)

Returns true if you should show UI with a rationale for requesting a permission.

This function was introduced in Qt 5.10.

void QtAndroid::startActivity(const QAndroidJniObject &intent, int receiverRequestCode, QAndroidActivityResultReceiver *resultReceiver = nullptr)

Starts the activity given by intent and provides the result asynchronously through the resultReceiver if this is non-null.

If resultReceiver is null, then the startActivity() method in the androidActivity() will be called. Otherwise startActivityForResult() will be called.

The receiverRequestCode is a request code unique to the resultReceiver, and will be returned along with the result, making it possible to use the same receiver for more than one intent.

This function was introduced in Qt 5.3.

void QtAndroid::startActivity(const QAndroidIntent &intent, int receiverRequestCode, QAndroidActivityResultReceiver *resultReceiver = nullptr)

Starts the activity given by intent and provides the result asynchronously through the resultReceiver if this is non-null.

If resultReceiver is null, then the startActivity() method in the androidActivity() will be called. Otherwise startActivityForResult() will be called.

The receiverRequestCode is a request code unique to the resultReceiver, and will be returned along with the result, making it possible to use the same receiver for more than one intent.

This function was introduced in Qt 5.13.

void QtAndroid::startActivity(const QAndroidJniObject &intent, int receiverRequestCode, std::function<void (int, int, const QAndroidJniObject &)> callbackFunc)

Starts the activity given by intent, using the request code receiverRequestCode, and provides the result by calling callbackFunc.

This function was introduced in Qt 5.13.

void QtAndroid::startIntentSender(const QAndroidJniObject &intentSender, int receiverRequestCode, QAndroidActivityResultReceiver *resultReceiver = nullptr)

Starts the activity given by intentSender and provides the result asynchronously through the resultReceiver if this is non-null.

If resultReceiver is null, then the startIntentSender() method in the androidActivity() will be called. Otherwise startIntentSenderForResult() will be called.

The receiverRequestCode is a request code unique to the resultReceiver, and will be returned along with the result, making it possible to use the same receiver for more than one intent.

This function was introduced in Qt 5.3.