android - qt 传感器 readingChanged() 事件不工作 altought 连接正常
问题描述
我编写了一个简单的 android 应用程序,可以保存来自 android 设备(三星 S6)的各种传感器读数。但是在我将我的项目移动到另一个版本的 qt 后它不起作用。我使用的是 qt 5.14.0,android sdk 版本 26 和 ndk 版本 21。我的 pro 文件如下所示:
QT += core gui location positioning quickwidgets quick sensors
CONFIG += qt console c++11 mobility
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = RECORDER
TEMPLATE = app
DEFINES += QT_DEPRECATED_WARNINGS
传感器创建部分如下所示(例如用于加速):
mAcc = new QAccelerometer();
mAcc->setAccelerationMode(QAccelerometer::AccelerationMode::Combined);
我的信号槽连接部分如下所示:
bool tAccConn = connect(mAcc, SIGNAL(readingChanged()), this, SLOT(mAccRead()));
qDebug() << "Acc Connections State =" << tAccConn << "\n";
mAcc->start();
连接返回 true。但是连接到 readingChanged() 信号的槽永远不会收到任何东西。这一切对我来说都是真实的。任何想法?
编辑 1. AndroidManifest.xml:
<!-- The following comment will be replaced upon deployment with default permissions based on the dependencies of the application.
Remove the comment if you do not require these default permissions. -->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<!-- The following comment will be replaced upon deployment with default features based on the dependencies of the application.
Remove the comment if you do not require these default features. -->
<supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/>
<application android:hardwareAccelerated="true" android:name="org.qtproject.qt5.android.bindings.QtApplication" android:label="IMURECORDER" android:extractNativeLibs="true">
<activity android:configChanges="orientation|uiMode|screenLayout|screenSize|smallestScreenSize|layoutDirection|locale|fontScale|keyboard|keyboardHidden|navigation|mcc|mnc|density"
android:name="org.qtproject.qt5.android.bindings.QtActivity"
android:label="RECORDER"
android:screenOrientation="unspecified"
android:launchMode="singleTop">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
<!-- Application arguments -->
<!-- meta-data android:name="android.app.arguments" android:value="arg1 arg2 arg3"/ -->
<!-- Application arguments -->
<meta-data android:name="android.app.lib_name" android:value="IMURECORDER"/>
<meta-data android:name="android.app.qt_sources_resource_id" android:resource="@array/qt_sources"/>
<meta-data android:name="android.app.repository" android:value="default"/>
<meta-data android:name="android.app.qt_libs_resource_id" android:resource="@array/qt_libs"/>
<meta-data android:name="android.app.bundled_libs_resource_id" android:resource="@array/bundled_libs"/>
<!-- Deploy Qt libs as part of package -->
<meta-data android:name="android.app.bundle_local_qt_libs" android:value="1"/>
<!-- Run with local libs -->
<meta-data android:name="android.app.use_local_qt_libs" android:value="1"/>
<meta-data android:name="android.app.libs_prefix" android:value="/data/local/tmp/qt/"/>
<meta-data android:name="android.app.load_local_libs_resource_id" android:resource="@array/load_local_libs"/>
<meta-data android:name="android.app.load_local_jars" android:value="jar/QtAndroid.jar:jar/QtPositioning.jar:jar/QtAndroidBearer.jar"/>
<meta-data android:name="android.app.static_init_classes" android:value="org.qtproject.qt5.android.positioning.QtPositioning"/>
<!-- Used to specify custom system library path to run with local system libs -->
<!-- <meta-data android:name="android.app.system_libs_prefix" android:value="/system/lib/"/> -->
<!-- Messages maps -->
<meta-data android:value="@string/ministro_not_found_msg" android:name="android.app.ministro_not_found_msg"/>
<meta-data android:value="@string/ministro_needed_msg" android:name="android.app.ministro_needed_msg"/>
<meta-data android:value="@string/fatal_error_msg" android:name="android.app.fatal_error_msg"/>
<meta-data android:value="@string/unsupported_android_version" android:name="android.app.unsupported_android_version"/>
<!-- Messages maps -->
<!-- Splash screen -->
<!-- Orientation-specific (portrait/landscape) data is checked first. If not available for current orientation,
then android.app.splash_screen_drawable. For best results, use together with splash_screen_sticky and
use hideSplashScreen() with a fade-out animation from Qt Android Extras to hide the splash screen when you
are done populating your window with content. -->
<!-- meta-data android:name="android.app.splash_screen_drawable_portrait" android:resource="@drawable/logo_portrait" / -->
<!-- meta-data android:name="android.app.splash_screen_drawable_landscape" android:resource="@drawable/logo_landscape" / -->
<!-- meta-data android:name="android.app.splash_screen_drawable" android:resource="@drawable/logo"/ -->
<!-- meta-data android:name="android.app.splash_screen_sticky" android:value="true"/ -->
<!-- Splash screen -->
<!-- Background running -->
<!-- Warning: changing this value to true may cause unexpected crashes if the
application still try to draw after
"applicationStateChanged(Qt::ApplicationSuspended)"
signal is sent! -->
<meta-data android:name="android.app.background_running" android:value="false"/>
<!-- Background running -->
<!-- auto screen scale factor -->
<meta-data android:name="android.app.auto_screen_scale_factor" android:value="false"/>
<!-- auto screen scale factor -->
<!-- extract android style -->
<!-- available android:values :
* default - In most cases this will be the same as "full", but it can also be something else if needed, e.g., for compatibility reasons
* full - useful QWidget & Quick Controls 1 apps
* minimal - useful for Quick Controls 2 apps, it is much faster than "full"
* none - useful for apps that don't use any of the above Qt modules
-->
<meta-data android:name="android.app.extract_android_style" android:value="default"/>
<!-- extract android style -->
</activity>
<!-- For adding service(s) please check: https://wiki.qt.io/AndroidServices -->
</application>
解决方案
推荐阅读
- javascript - 在现有的 React 项目中实现 babel/typescript
- mysql - ionic 和 mongodb 是必须的,还是我可以使用 mysql
- python-3.x - Django Admin 中的自定义 ModelForm
- laravel - JWT 认证总是返回 401 未授权
- javascript - 如何检查哪个选项卡处于活动状态?
- r - 在r中的一页中组合几个ggplot
- java - 围绕原点旋转“细胞”
- node.js - 无法读取未定义的属性“活动”
- java - 如何像在JavaFX中通过的信号一样为线条着色
- web-services - 如何在 OpenEdge Progress4GL 中将 XML 响应转换为临时表?