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    Call for Presentations - Qt World Summit

    Solved Qt - Get absolute path from image in the gallery

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    • guidupas
      guidupas last edited by guidupas

      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";
          }
      }
      

      Att.
      Guilherme Cortada Dupas

      1 Reply Last reply Reply Quote 0
      • guidupas
        guidupas last edited by

        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";
            }
        }
        

        Att.
        Guilherme Cortada Dupas

        1 Reply Last reply Reply Quote 1
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