如何在 Android 上的 QLineEdit 中关闭预测文本？

Question

I'm trying to build an app for both android and linux using Qt 5.12. It's necessary to read the current text in QLineEdit every time a character is typed in. On Android 6 device the current text part shows underlined while typing and the predictor is shown. I only get the signals QLineEdit::textChanged on every Space or Return . Same behavior for signals QLineEdit::textEdited QLineEdit::cursorPositionChanged . Disabling both QCompleter and QValidator didn't help.

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->lineEdit->setCompleter(nullptr);
    ui->lineEdit->setValidator(nullptr);
}


void MainWindow::on_lineEdit_textChanged(const QString &arg1)
{
    //just for demonstration
    ui->listWidget->addItem(arg1);
}

Qt 5.12.6 Android 6.0.1/Android 7.1.1 Google Keyboard

Many thanks for your response!

Answer 1

For those who are interested or are facing the same problem: QLinedit::setInputMethodHints() is the right choice.

    MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->lineEdit->setInputMethodHints(Qt::ImhNoPredictiveText|Qt::ImhNoAutoUppercase|Qt::ImhNoEditMenu);
}