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Thread: QT Android application suddenly crashes

  1. 2nd June 2015, 12:22 #1
    Reiji
    Reiji is offline Beginner
    Join Date
    May 2015
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    Qt products
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    Platforms
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    Default QT Android application suddenly crashes

    Hi,
    I'm developing an android app which calculates and dispalys the time of other time zones. Suddenly it begun to chrash everytime when I select the time zone via a Radio Button.
    And it doesn't calculates with the time anymore.

    The source code of the main windows(called weltzeit in my project):

    Qt Code: 
    1. #include "weltzeit.h"
    2. #include "ui_weltzeit.h"
    3. #include <QTime>
    4. #include <QDebug>
    5.  
    6. WeltZeit::WeltZeit(QWidget *parent) :
    7.     QMainWindow(parent),
    8.     ui(new Ui::WeltZeit)
    9. {
    10.     ui->setupUi(this);
    11. }
    12.  
    13. WeltZeit::~WeltZeit()
    14. {
    15.     delete ui;
    16. }
    17.  
    18. int DST = 0;
    19.  
    20. QTime ct = QTime::currentTime();
    21.  
    22.  
    23. void WeltZeit::on_DSTBox_clicked()
    24. {
    25.     DST = 1;
    26. }
    27.  
    28.  
    29. void WeltZeit::on_BerlinButton_clicked()
    30. {
    31.     ui->CTtimeEdit->setTime(ct);
    32.     ui->DEtimeEdit->setTime(ct);
    33.     QTime eng = ct.addSecs(-3600);
    34.     ui->ENtimeEdit->setTime(eng);
    35.     if (DST == 1)
    36.     {
    37.         QTime jp = ct.addSecs(25200);
    38.         ui->JPtimeEdit->setTime(jp);
    39.     }
    40.     else
    41.     {
    42.     QTime jp = ct.addSecs(28800);
    43.     ui->JPtimeEdit->setTime(jp);
    44.     }
    45.     QTime ny = ct.addSecs(-21600);
    46.     ui->NytimeEdit->setTime(ny);
    47. }
    48.  
    49.  
    50.  
    51. void WeltZeit::on_LondonButton_clicked()
    52. {
    53.     // QString ctTime = ct.toString("HH:mm:ss");
    54.     ui->CTtimeEdit->setTime(ct);
    55.     ui->ENtimeEdit->setTime(ct);
    56.     QTime de = ct.addSecs(3600);
    57.     ui->DEtimeEdit->setTime(de);
    58.     if (DST == 1)
    59.     {
    60.         QTime jp = ct.addSecs(28800);
    61.         ui->JPtimeEdit->setTime(jp);
    62.     }
    63.     else
    64.     {
    65.     QTime jp = ct.addSecs(32400);
    66.     ui->JPtimeEdit->setTime(jp);
    67.     }
    68.     QTime ny = ct.addSecs(-25200);
    69.     ui->NytimeEdit->setTime(ny);
    70.  
    71. }
    72.  
    73.  
    74.  
    75.  
    76. void WeltZeit::on_uhrzeitBtn_clicked()
    77. {
    78.     QTime ct = QTime::currentTime();
    79.     // QString ctTime = ct.toString("HH:mm:ss");
    80.     ui->CTtimeEdit->setTime(ct);
    81. }
    82.  
    83.  
    84.  
    85. void WeltZeit::on_JapanButton_clicked()
    86. {
    87.     ui->CTtimeEdit->setTime(ct);
    88.     ui->JPtimeEdit->setTime(ct);
    89.     if (DST ==1) {
    90.         QTime de = ct.addSecs(-28800);
    91.         ui->DEtimeEdit->setTime(de);
    92.         QTime en = ct.addSecs(-25200);
    93.         ui->ENtimeEdit->setTime(en);
    94.         QTime ny = ct.addSecs(-50400);
    95.         ui->NytimeEdit->setTime(ny);
    96.     }
    97.     else
    98.     {
    99.     QTime de = ct.addSecs(-25200);
    100.     ui->DEtimeEdit->setTime(de);
    101.     QTime en = ct.addSecs(-28800);
    102.     ui->ENtimeEdit->setTime(en);
    103.     QTime ny = ct.addSecs(-54000);
    104.     ui->NytimeEdit->setTime(ny);
    105.     }
    106. }
    107.  
    108.  
    109.  
    110. void WeltZeit::on_NewYorkButton_clicked()
    111. {
    112.     ui->CTtimeEdit->setTime(ct);
    113.     ui->NytimeEdit->setTime(ct);
    114.     QTime de = ct.addSecs(21600);
    115.     ui->DEtimeEdit->setTime(de);
    116.     QTime en = ct.addSecs(25200);
    117.     ui->ENtimeEdit->setTime(en);
    118.     if (DST == 1)
    119.     {
    120.         QTime jp = ct.addSecs(46800);
    121.         ui->JPtimeEdit->setTime(jp);
    122.     }
    123.     else
    124.     {
    125.     QTime jp = ct.addSecs(50400);
    126.     ui->JPtimeEdit->setTime(jp);
    127.     }
    128. }
    129.  
    130.  
    131. void WeltZeit::on_ENtimeEdit_timeChanged(const QTime &time)
    132. {
    133.    QTime deTime = ui->ENtimeEdit->time().addSecs(3600); //adds an hour
    134.    ui->DEtimeEdit->setTime(deTime);
    135.    QTime nyTime = ui->ENtimeEdit->time().addSecs(-18000);
    136.    ui->NytimeEdit->setTime(nyTime);
    137.    if (DST == 1)
    138.    {
    139.        QTime jpTime = ui->ENtimeEdit->time().addSecs(28800);
    140.        ui->NytimeEdit->setTime(jpTime);
    141.    }
    142.    else
    143.    {
    144.        QTime jpTime = ui->ENtimeEdit->time().addSecs(32400);
    145.        ui->NytimeEdit->setTime(jpTime);
    146.    }
    147.  
    148. }
    149.  
    150.  
    151. void WeltZeit::on_DEtimeEdit_timeChanged(const QTime &time)
    152. {
    153.     QTime enTime = ui->DEtimeEdit->time().addSecs(-3600); //adds an hour
    154.     ui->ENtimeEdit->setTime(enTime);
    155.     QTime nyTime = ui->DEtimeEdit->time().addSecs(-21600);
    156.     ui->NytimeEdit->setTime(nyTime);
    157.     if (DST == 1)
    158.     {
    159.         QTime jpTime = ui->DEtimeEdit->time().addSecs(25200);
    160.         ui->JPtimeEdit->setTime(jpTime);
    161.     }
    162.     else
    163.     {
    164.         QTime jpTime = ui->DEtimeEdit->time().addSecs(28800);
    165.         ui->JPtimeEdit->setTime(jpTime);
    166.     }
    167. }
    168.  
    169. void WeltZeit::on_JPtimeEdit_timeChanged(const QTime &time)
    170. {
    171.     if (DST == 1)
    172.     {
    173.         QTime enTime = ui->JPtimeEdit->time().addSecs(-28800);
    174.         ui->ENtimeEdit->setTime(enTime);
    175.         QTime deTime = ui->JPtimeEdit->time().addSecs(-25200);
    176.         ui->DEtimeEdit->setTime(deTime);
    177.         QTime nyTime = ui->JPtimeEdit->time().addSecs(-46800);
    178.         ui->NytimeEdit->setTime(nyTime);
    179.     }
    180.     else
    181.     {
    182.         QTime enTime = ui->JPtimeEdit->time().addSecs(-32400);
    183.         ui->ENtimeEdit->setTime(enTime);
    184.         QTime deTime = ui->JPtimeEdit->time().addSecs(-28800);
    185.         ui->DEtimeEdit->setTime(deTime);
    186.         QTime nyTime = ui->JPtimeEdit->time().addSecs(-50400);
    187.         ui->NytimeEdit->setTime(nyTime);
    188.     }
    189. }
    190.  
    191. void WeltZeit::on_NytimeEdit_timeChanged(const QTime &time)
    192. {
    193.     QTime enTime = ui->NytimeEdit->time().addSecs(18000); //adds an hour
    194.     ui->ENtimeEdit->setTime(enTime);
    195.     QTime deTime = ui->NytimeEdit->time().addSecs(21600);
    196.     ui->DEtimeEdit->setTime(deTime);
    197.     if (DST == 1)
    198.     {
    199.         QTime jpTime = ui->NytimeEdit->time().addSecs(46800);
    200.         ui->JPtimeEdit->setTime(jpTime);
    201.     }
    202.     else
    203.     {
    204.         QTime jpTime = ui->NytimeEdit->time().addSecs(50400);
    205.         ui->JPtimeEdit->setTime(jpTime);
    206.     }
    207. }
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    The form(when it worked):

    Unbenannt.jpg


    The form(before it crashes):
    Unbenannt2.jpg

    At the end of output of the application(in qt creator) I get the message:
    Fatal signal 11 (SIGSEGV) at 0xaab6beac (code=2), thread 1415 (xample.WeltZeit)
    Last edited by Reiji; 2nd June 2015 at 13:20.
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  2. 3rd June 2015, 13:25 #2
    Reiji
    Reiji is offline Beginner
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    Qt products
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    Lightbulb Re: QT Android application suddenly crashes

    I found my problem.The problem was that I put a slot(changedTime) at any QTimeEdit element. I already change the time by selecting the time zone with the radio button.
    So after I slected my time zone every time of every QTimeEdit elements are changed. And after that all the functions of every changedTime-Slot tries to change the time of each other QTimeEdit elemts until the application doesn't respond anymore.

    Now I have to find a slot which just responds if i clicked a key(for example: enter-key).
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