From 2c9fc2c1a197b84ba9ef3dc4e586a77a18c3dcc5 Mon Sep 17 00:00:00 2001 From: BogDan Vatra Date: Tue, 2 Apr 2019 14:00:37 +0300 Subject: Say hello to Qt Android Sensors based on NDK API Until Qt 5.9, we had to use JNI way because the NDK sensors API was introduced in API-16. Starting with Qt 5.9 we can safely use the NDK API as API_16 is the minimum API supported by Qt. Using the NDK API instead of JNI boost the performance a lot! The CPU usage dropped 2 to 4 times, from over 60% using the JNI to less than 20%. [ChangeLog][Android] Rewrite Qt Android Sensors using NDK API. Change-Id: If3e3f1e56973e2a189662912b2a6ebfbd71dee14 Reviewed-by: Lorn Potter --- .../sensors/android/src/androidtemperature.cpp | 64 ---------------------- 1 file changed, 64 deletions(-) delete mode 100644 src/plugins/sensors/android/src/androidtemperature.cpp (limited to 'src/plugins/sensors/android/src/androidtemperature.cpp') diff --git a/src/plugins/sensors/android/src/androidtemperature.cpp b/src/plugins/sensors/android/src/androidtemperature.cpp deleted file mode 100644 index 3a9e1f51..00000000 --- a/src/plugins/sensors/android/src/androidtemperature.cpp +++ /dev/null @@ -1,64 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 BogDan Vatra -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtSensors module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "androidtemperature.h" - -AndroidTemperature::AndroidTemperature(AndroidSensors::AndroidSensorType type, QSensor *sensor) - : AndroidCommonSensor(type, sensor) -{} - - -void AndroidTemperature::onAccuracyChanged(jint accuracy) -{ - Q_UNUSED(accuracy) -} - -void AndroidTemperature::onSensorChanged(jlong timestamp, const jfloat *values, uint size) -{ - if (size < 1) - return; - m_reader.setTimestamp(timestamp/1000); - - // TODO: I was unable to test this since the devices I was testing this with did not have - // a temperature sensor. Verify that this works and check that the units are correct. - - m_reader.setTemperature(values[0]); - newReadingAvailable(); -} -- cgit v1.2.3