CODEWITHSUNDEEP
androidandroid-layoutandroid-imageview
user2781902
user2781902

Reputation: 63

Android: How to detect touch events on dynamically created ImageView

I have the following design :

<LinearLayout>
  <ScrollLayout>
    <LinearLayout> .... </LinearLayout> ----> TextView and ImageView dynamically created in this LinearLayout
  </ScrollLayout>
</LinearLayout>

I need to detect touch events on the dynamically created ImageView(s). I don't know how many ImageView will be created dynamically. How can I detect which ImageView was touched by the user ?

Thanks for your help.

Upvotes: 0

Views: 1300

Answers (2)

Matt
Matt

Reputation: 3847

You'll want to create one [maybe more] View.OnClickListeners in your java code. Then when each ImageView is added, you can assign that OnClickListener to it using View.setOnClickListener. To determine which was clicked, you can set a "Tag" using View.setTag() and then when onClick is called, use View.getTag() to determine which was clicked. The tag should be uniquely identifiable.

Here's some rough code (untested):

private OnClickListener imageViewListener extends View.OnClickListener{
    public void onClick(View v){
        Intent i = new Intent(v.getContext(), NewActivity.class);
        i.putExtra("ImageURI", v.getTag().toString());
        startActivity(i);
    }
}

Then as you add images, you just set the tag and listener:

for(String uri: someList){
    ImageView iv = new ImageView(this);
    iv.setTag(uri);
    iv.setImageUri(uri);
    iv.setOnClickListener(imageViewListener);
}

Upvotes: 2

nstosic
nstosic

Reputation: 2614

You should use View.OnTouchLisetener class. So, after initializing your ImageView, add this call to it:

imageView.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent e) {
        //Your code here
    }
});

Upvotes: 1

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