android: custom datadir retrieve filepath

src/qml/androidcustomdatadir.cpp

@@ -0,0 +1,48 @@
+// Copyright (c) 2023 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <qml/androidcustomdatadir.h>
+
+#include <common/args.h>
+#include <qml/util.h>
+#include <qml/guiconstants.h>
+#include <qt/guiutil.h>
+
+#include <QDebug>
+#include <QFile>
+#include <QStandardPaths>
+#include <QDir>
+
+AndroidCustomDataDir::AndroidCustomDataDir(QObject * parent)
+    : QObject(parent)
+{
+    m_default_data_dir = QStandardPaths::writableLocation(QStandardPaths::AppDataLocation);
+}
+
+void AndroidCustomDataDir::setDataDir(const QString & new_data_dir)
+{
+    if (m_data_dir == new_data_dir) {
+        return;
+    }
+
+    m_data_dir = new_data_dir;
+    gArgs.SoftSetArg("-datadir", fs::PathToString(GUIUtil::QStringToPath(m_data_dir)));
+    gArgs.ClearPathCache();
+    Q_EMIT dataDirChanged();
+}
+
+QString AndroidCustomDataDir::readCustomDataDir()
+{
+    QFile file(m_default_data_dir + "/filepath.txt");
+    QString storedPath;
+
+    if (file.open(QIODevice::ReadOnly)) {
+        QTextStream in(&file);
+        storedPath = in.readAll().trimmed();
+        file.close();
+        // Process the retrieved path
+        qDebug() << "Retrieved path: " << storedPath;
+    }
+    return storedPath;
+}

src/qml/androidcustomdatadir.h

@@ -0,0 +1,32 @@
+// Copyright (c) 2024 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_QML_ANDROIDCUSTOMDATADIR_H
+#define BITCOIN_QML_ANDROIDCUSTOMDATADIR_H
+
+#include <QFile>
+#include <QStandardPaths>
+#include <QDir>
+
+class AndroidCustomDataDir : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString dataDir READ dataDir WRITE setDataDir NOTIFY dataDirChanged)
+
+public:
+    explicit AndroidCustomDataDir(QObject * parent = nullptr);
+
+    QString dataDir() const { return m_data_dir; }
+    void setDataDir(const QString & new_data_dir);
+    QString readCustomDataDir();
+
+Q_SIGNALS:
+    void dataDirChanged();
+
+private:
+    QString m_data_dir;
+    QString m_default_data_dir;
+};
+
+#endif // BITCOIN_QML_ANDROIDCUSTOMDATADIR_H