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el.trasgu
Asked: 2022-05-17 03:31:39 +0800 CST 2022-05-17 03:31:39 +0800 CST

Load images in ImageView android studio with Picasso library from variable

  • 772

I have followed several manuals and seen several answers on the subject, but my limited knowledge allows me to find the solution, that's why I turn to you.

I want to upload a member's image to a activity. I have the images in the folder drawables.

If I load the image individually using R.dragable.3904123, the image loads without problems

If I use variables to get that same address of the image, the image is not displayed.

private void metodoCargarImagen() {
   //este método lo usaba para obtener la URL de la imagen del servidor, ahora obtengo(R.dragable.)
    String imagenURL = miConexion.metodoEnviarRutaImagenes();
    //este método lo utilizo para obtener el nombre de la imagen, en este caso(3904123)
    String nImagen = metodoObtenerNumeroImagen(socio);
    //aqui concateno (R.dragable. + a + 3904123)
    String rutaImg = imagenURL + "a" + nImagen;
    //convierto el String en URI ?
    Uri uriImagen = Uri.parse(rutaImg);
    //Agrega imagen al ImageView.
    Picasso.with(this)
            .load(uriImagen) //con este método, a la derecha me aparece el texto "RequestCreator"
            .error(R.drawable.avestruz)
            .fit()
            .centerInside()
            .into(img_vS_img);
}

This is the image code:

<ImageView
    android:id="@+id/img_vS_img"
    android:layout_width="102dp"
    android:layout_height="145dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/avestruz" />

This would be the code loading the same image address, but individually:

private void metodoCargarImagen() {
    String imagenURL = miConexion.metodoEnviarRutaImagenes();
    String nImagen = metodoObtenerNumeroImagen(socio);
    //Uri rutaImg = imagenURL + "a" + nImagen + extImg;
    String rutaImg = imagenURL + "a" + nImagen;
    //Uri uriImage = Uri.parse("android.resource://" + getPackageName() +"/"+ rutaImg);
    //Crea ruta de la imagen.
    //rutaImg = rutaImg.replace("@drawable/", "android.resource://"+ getPackageName() +"/drawable/");
    //Obtiene la uri de la imagen.
    Uri uriImagen = Uri.parse(rutaImg);
    //Agrega imagen al ImageView.
    Picasso.with(this)
            .load(R.drawable.a3904123)  //Me sigue apareciendo "RequestCreator" pero la imagen es visible
            .error(R.drawable.avestruz)
            .fit()
            .centerInside()
            .into(img_vS_img);
}

image of the code by variable

enter image description here

enter image description here

The possibility of loading the image without converting it into Uri, I had previously discarded it because it didn't work for me either

java

2 Answers

  1. If you're using Picassoyou don't have to cast the url to URI, you can load the url to load the image, just make sure the variable rutaImgcontains a valid image url.

    private void metodoCargarImagen() {
   //este método lo usaba para obtener la URL de la imagen del servidor, ahora obtengo(R.dragable.)
    String imagenURL = miConexion.metodoEnviarRutaImagenes();
    //este método lo utilizo para obtener el nombre de la imagen, en este caso(3904123)
    String nImagen = metodoObtenerNumeroImagen(socio);
    //aqui concateno (R.dragable. + a + 3904123)
    String rutaImg = imagenURL + "a" + nImagen;

    //convierto el String en URI ?
    //Uri uriImagen = Uri.parse(rutaImg);

    //Agrega imagen al ImageView.
    Picasso.with(this)
            .load(rutaImg /*uriImagen*/) //con este método, a la derecha me aparece el texto "RequestCreator"
            .error(R.drawable.avestruz)
            .fit()
            .centerInside()
            .into(img_vS_img);
}
    • 1
  2. Best Answer

    R.drawable.a3904123is a intthat corresponds to the id of the image. It is not the same as string "R.drawable.a3904123". Converting it to uri doesn't make it valid either. In fact that step doesn't make any difference because it's what Picasso does internally when you pass it a string.

    For the uri to be valid it must have this format

    String imagenURL = "android.resource://"+ getPackageName() +"/drawable/";
String nImagen = metodoObtenerNumeroImagen(socio);
String rutaImg = imagenURL + "a" + nImagen;

    But you can also load the image from its id

    String nImagen = metodoObtenerNumeroImagen(socio);
int resId = getResources().getIdentifier("a"+nImagen, "drawable", getPackageName());
Picasso.with(this)
        .load(resId)
        .error(R.drawable.avestruz)
        .fit()
        .centerInside()
        .into(img_vS_img);
    • 1