Get background / background of an image dynamically

How to get the background/bottom image of a ImageViewdynamically.

Is there any way to get the background name of each TextView. For example, if the first one has a background called through a drawable called "background1", is there a way to access that name?

What you would do is access the id of the uploaded image by defining the name in the tag:

<ImageView
    android:id="@+id/puesto_1_foto_1" 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"    
    android:background="@drawable/fondo1"
    android:tag="fondo1"/>

By getting the referenceImageView

ImageView puesto_1_foto_1 = (ImageView) findViewById(R.id.puesto_1_foto_1);

you can get its id through its tag:

//obtiene el tag del ImageView.
String backgroundImage1 = String.valueOf(imageView1.getTag());
//obtiene id mediante el método getIdentifier().
int resourceId = getResources().getIdentifier(backgroundImage1, "drawable", getPackageName());

this id is the one you would use to load the image in another ImageView:

//convierte el id a Drawable
Drawable myDrawable = getResources().getDrawable(resourceId);
//Asigna el Drawable al ImageView.
imageView2.setImageDrawable(myDrawable);

Example:

According to the following layout we add 2 ImageView to which we want to exchange their images, for this in the tag, we add the name of the image ("android" and "robotito" ):

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:id="@+id/my_layout"
    android:orientation="vertical">

     <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/android"
        android:tag="android"/>


    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/robotito"
        android:tag="robotito"/>

</LinearLayout>

To exchange the images we need to obtain the id of the resource loaded in each ImageView, first we obtain the name of the resource and then its id, for this we use the getIdentifier() method :

 ImageView imageView1 = (ImageView) findViewById(R.id.imageView1);
 //Obtiene nombre de imagen mediante el tag.
 String backgroundImage1 = String.valueOf(imageView1.getTag());

 ImageView imageView2 = (ImageView) findViewById(R.id.imageView2);
 //Obtiene nombre de imagen mediante el tag.
 String backgroundImage2 = String.valueOf(imageView2.getTag());

  //Obtiene id de imagen cargada en ImageView1
  //backgroundImage1 en este punto tiene el valor de "android".
  int resourceId = getResources().getIdentifier(backgroundImage1, "drawable", getPackageName());
  //Obtiene id de imagen cargada en ImageView2
  //backgroundImage1 en este punto tiene el valor de "robotito".
  int resourceId2 = getResources().getIdentifier(backgroundImage2, "drawable", getPackageName());

when obtaining the id we obtain the Drawable from the id:

  //convierte el id de imagen cargada en ImageView1 a Drawable.
  Drawable myDrawable1 = getResources().getDrawable(resourceId);
  //convierte el id de imagen cargada en ImageView2 a Drawable.
  Drawable myDrawable2 = getResources().getDrawable(resourceId2);

Now we can swap the images:

   //Asigna imagen de ImageView2 a ImageView1.
   imageView1.setImageDrawable(myDrawable2);

   //Asigna imagen de ImageView1 a ImageView2.
   imageView2.setImageDrawable(myDrawable1);

to get the following result:

Having the id of the resource in the system we can dynamically load another image,

imageView1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
     //Carga imagen de ImageView2 a ImageView1
     imageView1.setImageDrawable(myDrawable2);
}
});
imageView2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
     //Carga imagen de ImageView1 a ImageView2
     imageView2.setImageDrawable(myDrawable1);
}
});

You have to program an event that triggers the change, it is commonly used on clicklistener, that is, every time you click the imageView, you can change it as follows:

puesto_1_foto_1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
    puesto_1_foto_1.setImageResource("Aqui va la el fondo dos");
}
});

And you do something similar for imageview two:

puesto_2_foto_2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
    puesto_2_foto_2.setImageResource("Aqui va la el fondo uno"); 
}
});