Qt - Get absolute path from image in the gallery



  • I have done a code to get an image from Android gallery. I am using QtAndroid to write a equivalent java code in Qt.

    I have already opened the gallery, selected the image and received the path, but it returns the MediaColumn of the file and I need the absolute path.

    How can I get the absolute path of the file using QAndroid to write a Java equivalent code in Qt?

    Here is the code I have done:

    imagepickerandroid.h

    #ifndef IMAGEPICKERANDROID_H
    #define IMAGEPICKERANDROID_H
    
    
    #include <QObject>
    #include <QtAndroidExtras>
    
    #include <QDebug>
    
    class imagePickerAndroid : public QObject, public QAndroidActivityResultReceiver
    {
        Q_OBJECT
    
    public:
        imagePickerAndroid();
    
        void buscaImagem();
    
        virtual void handleActivityResult(int receiverRequestCode, int resultCode, const QAndroidJniObject & data);
    
    signals:
        void imagemCaminhoSignal(QString);
    };
    
    #endif // IMAGEPICKERANDROID_H
    

    imagepickerandroid.cpp

    #include "imagepickerandroid.h"
    
    imagePickerAndroid::imagePickerAndroid()
    {
    
    }
    
    void imagePickerAndroid::buscaImagem()
    {
        QAndroidJniObject ACTION_PICK = QAndroidJniObject::fromString("android.intent.action.GET_CONTENT");
        QAndroidJniObject intent("android/content/Intent");
        if (ACTION_PICK.isValid() && intent.isValid())
        {
            intent.callObjectMethod("setAction", "(Ljava/lang/String;)Landroid/content/Intent;", ACTION_PICK.object<jstring>());
            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)
    {
        qDebug() << "Trabalha com os dados";
    
        jint RESULT_OK = QAndroidJniObject::getStaticField<jint>("android/app/Activity", "RESULT_OK");
        if (receiverRequestCode == 101 && resultCode == RESULT_OK) {
            QString imagemCaminho = data.callObjectMethod("getData", "()Landroid/net/Uri;").callObjectMethod("getPath", "()Ljava/lang/String;").toString();
            emit imagemCaminhoSignal(imagemCaminho);
    
            qDebug() << imagemCaminho;
        }
        else
        {
            qDebug() << "Caminho errado";
        }
    }


  • SOLVED

    Here is the code to get the full image path from android gallery using java equivalent code written with Qt:

    #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";
        }
    }

Log in to reply
 

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.