hi everyone,
I am using qt android 5.1.1

and I have problem even I add sensors to pro file what is problem.

Thank you for any comment.

problem is :
../sensor_test/mainwindow.cpp:9: error: undefined reference to 'QAccelerometer::QAccelerometer(QObject*)'
../sensor_test/mainwindow.cpp:19: error: undefined reference to 'QSensor::QSensor(QByteArray const&, QObject*)'
../sensor_test/mainwindow.cpp:20: error: undefined reference to 'QSensor::start()'
../sensor_test/mainwindow.cpp:21: error: undefined reference to 'QSensor::reading() const'
Makefile:146: recipe for target 'libsensor_test.so' failed
../sensor_test/mainwindow.cpp:22: error: undefined reference to 'QSensor::~QSensor()'
../sensor_test/mainwindow.cpp:22: error: undefined reference to 'QSensor::~QSensor()'
collect2.exe: error: ld returned 1 exit status
my profile:
Qt Code: 
  1. #-------------------------------------------------
  2. #
  3. # Project created by QtCreator 2013-08-30T14:44:53
  4. #
  5. #-------------------------------------------------
  6.  
  7. QT       += core gui
  8.  
  9. greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
  10.  
  11. TARGET = sensor_test
  12. TEMPLATE = app
  13.  
  14.  
  15. SOURCES += main.cpp\
  16.         mainwindow.cpp
  17.  
  18. HEADERS  += mainwindow.h
  19.  
  20. FORMS    += mainwindow.ui
  21.  
  22. CONFIG += mobility
  23. MOBILITY += sensors
  24.  
  25. OTHER_FILES += \
  26.     android/AndroidManifest.xml \
  27.     android/res/layout/splash.xml \
  28.     android/res/values/libs.xml \
  29.     android/res/values/strings.xml \
  30.     android/res/values-de/strings.xml \
  31.     android/res/values-el/strings.xml \
  32.     android/res/values-es/strings.xml \
  33.     android/res/values-et/strings.xml \
  34.     android/res/values-fa/strings.xml \
  35.     android/res/values-fr/strings.xml \
  36.     android/res/values-id/strings.xml \
  37.     android/res/values-it/strings.xml \
  38.     android/res/values-ja/strings.xml \
  39.     android/res/values-ms/strings.xml \
  40.     android/res/values-nb/strings.xml \
  41.     android/res/values-nl/strings.xml \
  42.     android/res/values-pl/strings.xml \
  43.     android/res/values-pt-rBR/strings.xml \
  44.     android/res/values-ro/strings.xml \
  45.     android/res/values-rs/strings.xml \
  46.     android/res/values-ru/strings.xml \
  47.     android/res/values-zh-rCN/strings.xml \
  48.     android/res/values-zh-rTW/strings.xml \
  49.     android/src/org/kde/necessitas/ministro/IMinistro.aidl \
  50.     android/src/org/kde/necessitas/ministro/IMinistroCallback.aidl \
  51.     android/src/org/qtproject/qt5/android/bindings/QtActivity.java \
  52.     android/src/org/qtproject/qt5/android/bindings/QtApplication.java \
  53.     android/version.xml
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and my code:

Qt Code: 
  1. #include "mainwindow.h"
  2. #include "ui_mainwindow.h"
  3.  
  4. MainWindow::MainWindow(QWidget *parent) :
  5.     QMainWindow(parent),
  6.     ui(new Ui::MainWindow)
  7. {
  8.     ui->setupUi(this);
  9.     ac=new QAccelerometer(this);
  10. }
  11.  
  12. MainWindow::~MainWindow()
  13. {
  14.     delete ui;
  15. }
  16.  
  17. void MainWindow::on_pushButton_clicked()
  18. {
  19.     QSensor sensor("QAccelerometer");
  20.     sensor.start();
  21.     QSensorReading *read=sensor.reading();
  22.     ui->lineEdit->setText(read->property("x").value<QString>());
  23. }
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