Get dynamic created views on android

Question

i'll try to be short.

This is a Pokemon App. I have a Linear Layout in which I add Pokemon Container elements dynamically and if the user press the Eye it will appear an image below the container. I want the eye to be a "toggle": If the user press it, the image will appear below the respective Pokemon Container, another click will cause the image to dissapear. So I need to associate a kind of ID for the Eye and the Pokemon Container in order to know what was clicked to remove the proper image. I can't use setId() because It will repeat for the eye icon and the container. I can't also set a String ID because is not possible in android..

Application Image HERE

In the XML I can set an id to that Eye like "eye_1", "eye_2", etc, and the Pokemon Container to "container_1", "container_2", etc. So inside the onClick() I could retrieve the number of the eye icon being pressed and show/remove the image.

I have no idea how to do this on android. I could do it on html getting elements by ID since Id can be any text but how in earth do I achieve this?

This will be much appreciated.

The XML in which I add dynamic data is this:

<ScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:id="@+id/data_section"
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="vertical">

        <!-- Data will be filled dynamically from the Database-->

    </LinearLayout>
</ScrollView>

I've just saw the answer below and I want to edit with a solution I've found myself. I don't know if this is the right place but here I go. The appDetailsIcon is what I i've called Eye and layoutPokemonContainer is the Pokemon Container. What I basically do is set the image if is not created and then I remove using the index.. I know there are 3 elements before the image.. it's kinda dirty but I've read that tag shouldn't be used to find views on android =/.

ImageView appDetailsIcon = new ImageView(this);
                appDetailsIcon.setImageDrawable(ContextCompat.getDrawable(this,R.drawable.icon_details_small));
appDetailsIcon.setOnClickListener(new View.OnClickListener(){
  public void onClick(View v){
    ImageView iv = (ImageView) findViewById(pokemon.getId());
    if(iv == null){//If the image doesn't exist I create it
    ImageView matchupDetail = new ImageView(v.getContext());

matchupDetail.setImageDrawable(ContextCompat.getDrawable(v.getContext(),R.drawable.matchup_bug));
matchupDetail.setId(pokemon.getId());
View v1 = (View) v.getParent();
    //I get the partent of the button (Pokemon layoutStatsContainer row)
    LinearLayout v2 = (LinearLayout) v1.getParent();
    //I get the parent of the statsContainer row (layoutPokemonContainer)
    v2.addView(matchupDetail);
    }else{//I remove the image from the view
    View v1 = (View) v.getParent();//I get the partent of the button (Pokemon layoutStatsContainer row)
    LinearLayout v2 = (LinearLayout) v1.getParent();//I get the parent of the statsContainer row (layoutPokemonContainer)
    v2.removeViewAt(3);
    }
  }
});

I really don't know how to use the editor is driving me nuts.. I can't get it to work properly.

BenRoob · Answer 1 · 2017-06-22T06:38:05.613

0

You can set a tag on view objects:

view.setTag("eye_1");

E.g. you can get it back in OnClickListener:

public void onClick(View v) {
    ...
    String myTag = (String) v.getTag() // getTag returns "Object"
    doYourLogic(myTag);
    ...
}

From java doc (View.java):

A tag can be used to mark a view in its hierarchy and does not have to be unique within the hierarchy.

What is the main purpose of setTag() getTag() methods of View?

edited Jun 22 '17 at 06:38

answered Jun 21 '17 at 15:29

BenRoob

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I've found a solution, but if yours is better I'll use it and mark as valid but v.getTag() doens't accept string, only int. And I cannot create an XML with tags since the idea would be having dynamic elements associated (or tagged) this way "eye_"+String.valueOf(pokemon.getId()) – Fragsman Jun 21 '17 at 16:16
Oh man, of course View.getTag() is without String parameter!! And it is not an xml attribute. I'll edit my answer. FYI, e.g. tags are usually used in the ViewHolder-pattern (with ListViews), and are also the recommended way in developer's guide: https://developer.android.com/training/improving-layouts/smooth-scrolling.html#ViewHolder I think tags are what you need ;) – BenRoob Jun 22 '17 at 06:46
You can even the your views with your pokemon objects :) – BenRoob Jun 22 '17 at 13:10

Get dynamic created views on android

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