Photo gallery in iOS and Android
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Hello!
I am developing an app for mobile to run in iOS and Android and I am facing some difficulties to access the photo gallery of the devices with Qt and Qml.
Could someone help me to figure out how I can do that?
Thanks a lot.
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Hi,
IIRC, QFileDialog handles that for iOS but I don't remember the state for Android
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I am developing an app for mobile to run in
iOS
andAndroid
and I am facing some difficulties to access theimage gallery
of the devices withQml
.I need to list the images from the image gallery in a
GridView
.I have tried to return the pictures folder using
QStandardPaths
but it just works for desktop computers. For smartphones runningiOS
andAndroid
it returns a folder that is not the folder of the gallery.Could someone help me to figure out how I can do that? My code is below:
main.cpp
#include <QGuiApplication> #include <QQmlApplicationEngine> #include <QtQml> #include "caminhoimagens.h" int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); qmlRegisterType<caminhoImagens>("PathImagens", 1, 0, "CaminhoImagens"); QQmlApplicationEngine engine; engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); return app.exec(); }
main.qml
import QtQuick 2.4 import QtQuick.Window 2.2 import QtQuick.Controls 1.3 import QtQuick.Dialogs 1.2 import Qt.labs.folderlistmodel 2.1 import PathImagens 1.0 Window { visible: true width: 360 height: 640 maximumHeight: 640 minimumHeight: 640 maximumWidth: 360 minimumWidth: 360 title: "Acessar Galeria Test" Rectangle { id: principal anchors.fill: parent ListModel { id: listModel } FolderListModel { id: folderListModel folder: "file://" + caminhoImagens.retornaCaminhoImagens() nameFilters: "*.jpeg" } CaminhoImagens { id: caminhoImagens } Item { id: listaFotosDelegate property Component delegateComponent: listaFotosDelegateComponent Component { id: listaFotosDelegateComponent Image { id: imagem source: folderListModel.folder + "/" + fileName width: principal.width / 4.2 height: principal.width / 4.2 fillMode: Image.PreserveAspectCrop } } } GridView { id: listaFotosGridView anchors.fill: parent clip: true model: folderListModel delegate: listaFotosDelegate.delegateComponent cellWidth: parent.width / 4 cellHeight: parent.width / 4 } } }
caminhoimagens.h
#ifndef CAMINHOIMAGENS_H #define CAMINHOIMAGENS_H #include <QObject> #include <QStandardPaths> class caminhoImagens : public QObject { Q_OBJECT public slots: QString retornaCaminhoImagens(); public: caminhoImagens(); }; #endif // CAMINHOIMAGENS_H
caminhoimagens.cpp
#include "caminhoimagens.h" caminhoImagens::caminhoImagens() { } QString caminhoImagens::retornaCaminhoImagens() { return QStandardPaths::locate(QStandardPaths::PicturesLocation, QString(), QStandardPaths::LocateDirectory); }
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Thanks for the reply @amahta
I am doing that with QAndroidJniObject to write a equivalent code with Qt
My problem now is that I am trying to get the MediaStore columns using QAndroidJniObject because the path returned is a reference to a column position like this
/document/image:30
Do you know how can I get the columns of MediaStore using QAndroidJniObject?
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If you mean to get the parameter of columns array to content resolver. You may try this code: (Didn't tested)
QAndroidJniObject data = QAndroidJniObject::getStaticObjectField("android/provider/MediaStore$Images$Media","Data");
btw, what you need to do it in JNI? I think it is just too troublesome.
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@benlau I need to geed an image from gallery and sent it to QML
Take a look at this post
https://forum.qt.io/topic/61539/qt-and-android-gallery-mediastore-using-qandroidjniobject -
I mean why don't you just code in Java.
Moreover, I think the signature should be "android/provider/MediaStore$Images$Media"
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@benlau , I think it's easier to handle with the activity in Qt.
Could you help me to solve the problem of the previous post link? -
Solved
Here is the code to get the
full image path
fromandroid gallery
usingjava
equivalent code written withQt
:#include "imagepickerandroid.h" imagePickerAndroid::imagePickerAndroid() { } void imagePickerAndroid::buscaImagem() { QAndroidJniObject ACTION_PICK = QAndroidJniObject::getStaticObjectField("android/content/Intent", "ACTION_PICK", "Ljava/lang/String;"); QAndroidJniObject EXTERNAL_CONTENT_URI = QAndroidJniObject::getStaticObjectField("android/provider/MediaStore$Images$Media", "EXTERNAL_CONTENT_URI", "Landroid/net/Uri;"); QAndroidJniObject intent=QAndroidJniObject("android/content/Intent", "(Ljava/lang/String;Landroid/net/Uri;)V", ACTION_PICK.object<jstring>(), EXTERNAL_CONTENT_URI.object<jobject>()); if (ACTION_PICK.isValid() && intent.isValid()) { intent.callObjectMethod("setType", "(Ljava/lang/String;)Landroid/content/Intent;", QAndroidJniObject::fromString("image/*").object<jstring>()); QtAndroid::startActivity(intent.object<jobject>(), 101, this); qDebug() << "OK"; } else { qDebug() << "ERRO"; } } void imagePickerAndroid::handleActivityResult(int receiverRequestCode, int resultCode, const QAndroidJniObject &data) { jint RESULT_OK = QAndroidJniObject::getStaticField<jint>("android/app/Activity", "RESULT_OK"); if (receiverRequestCode == 101 && resultCode == RESULT_OK) { QAndroidJniObject uri = data.callObjectMethod("getData", "()Landroid/net/Uri;"); QAndroidJniObject dadosAndroid = QAndroidJniObject::getStaticObjectField("android/provider/MediaStore$MediaColumns", "DATA", "Ljava/lang/String;"); QAndroidJniEnvironment env; jobjectArray projecao = (jobjectArray)env->NewObjectArray(1, env->FindClass("java/lang/String"), NULL); jobject projacaoDadosAndroid = env->NewStringUTF(dadosAndroid.toString().toStdString().c_str()); env->SetObjectArrayElement(projecao, 0, projacaoDadosAndroid); QAndroidJniObject contentResolver = QtAndroid::androidActivity().callObjectMethod("getContentResolver", "()Landroid/content/ContentResolver;"); QAndroidJniObject cursor = contentResolver.callObjectMethod("query", "(Landroid/net/Uri;[Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)Landroid/database/Cursor;", uri.object<jobject>(), projecao, NULL, NULL, NULL); jint columnIndex = cursor.callMethod<jint>("getColumnIndex", "(Ljava/lang/String;)I", dadosAndroid.object<jstring>()); cursor.callMethod<jboolean>("moveToFirst", "()Z"); QAndroidJniObject resultado = cursor.callObjectMethod("getString", "(I)Ljava/lang/String;", columnIndex); QString imagemCaminho = "file://" + resultado.toString(); emit imagemCaminhoSignal(imagemCaminho); } else { qDebug() << "Caminho errado"; } }