CODEWITHSUNDEEP
android
Vivek
Vivek

Reputation: 326

Setting instance variable in a Android View context class

I am trying to create a dynamic android layout with multiple views. The number of views are dependent on the items in a list.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools"
          android:id="@+id/layout_category"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_margin="5dp"
          android:layout_marginBottom="5px"
          android:layout_marginTop="5px"
          android:orientation="vertical"
          android:padding="5dp" tools:context=".CategoryActivity">

<ImageView
    android:id="@+id/img_category"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentStart="true"
    android:foregroundGravity="center"
    android:src="@android:drawable/ic_menu_view"/>

<TextView
    android:id="@+id/text_category"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Category"
    android:textColor="#000000"
    android:layout_alignParentStart="true"/></LinearLayout>

I inflate this view and then add to the mainlayout

    View view = getLayoutInflater().inflate(R.layout.activity_category_view, null);
    mainLayout.addView(view)

The context class for the view CategoryActivity has a instance variable categoryId

I need to set the value this categoryId and refer it later i.e. during onClick action and then take appropriate action

in the CategoryActivity class i have duly mentioned

setContentView(R.layout.activity_category_view);

I have tried various ways but still not able to resolve and am stuck for good !

Upvotes: 2

Views: 304

Answers (2)

Sushant Gosavi
Sushant Gosavi

Reputation: 3825

You can do something like 

android:tag="MyInstanceVariable" 

<ImageView
    android:id="@+id/img_category"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentStart="true"
    android:tag="MyInstanceVariable" 
    android:foregroundGravity="center"
    android:src="@android:drawable/ic_menu_view"/>

you can add it dynamically 

iv.setTag("MyInstanceVariable");
iv.setTag(R.String.Tag,"MyInstanceVariable");  //For multiple Tag

and you can access in java file like

  String tag = (String) iv.getTag();
  String tag = (String) iv.getTag(R.String.Tag);

Upvotes: 1

Amrut Bidri
Amrut Bidri

Reputation: 6360

In case of dynamic views, you must use getTag and setTag methods to store and retrieve data into/from the views. See the below code based on your question:

View view = getLayoutInflater().inflate(R.layout.activity_category_view, null);
view.setTag(categoryId);
view.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            int cat_id=(Integer)view.getTag();
            // do whatever you want to do further with it
        }
    });
mainLayout.addView(view);

I hope this will help you.

Upvotes: 1

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