How to pass String from 2 activities to one?

I have two activitys with lists.

One for tablet's an开发者_运维知识库d one for regular density phones. When an item in the list is clicked it launches the same activity for either activity with list's.

The problem is when an item is clicked i have getter and setter class that gets the URL for a particular item and passes it to the launching activity like this...

    private String URL = null;
try{
        URL = com.fttech.AbstractFeedsActivity.feed_url;

    }
    catch(IllegalArgumentException e){
        e.printStackTrace();
        URL = com.fttech.ItemsActivity.url;

    }

As you see what i tried to do is try and catch. So if the first one isnt found then the second one will be retrieved.

But it doesnt seem to work.

It returns null each time.

For what i have describe what is the best way to implement this? Is my way logic? Or is there a better way.

Thanks

Try this,

     private String URL = null;
     try{
            URL = com.fttech.AbstractFeedsActivity.feed_url;
            if(TextUtils.isEmpty(URL)){
                 URL = com.fttech.ItemsActivity.url;
                 // Pass this URL   
            }
            else{
              // If its not empty then it will pass the first URL
          }
        }
        catch(IllegalArgumentException e){
            e.printStackTrace();
        }

No need to pass String to 2 activities, if you want to just pass strings to one or as many activities as you want, just put them in SharedPreferences or declare a variable in static class and then set/get it whenever you want.

Passing values from one Activity to another:

Intent intent = new Intent(context, CalledActivity.class);
intent.putExtra(key, value);
startActivity(intent);

If you want some data back from called Activity then you can use startActivityForResult() as:

Intent intent = new Intent(context, CalledActivity.class);
intent.putExtra(key, value);
startActivityForResult(intent, requestCode);

In called activity you can set data as:

setResult(RESULT_OK, intent);

Note: Here you set the value in intent and pass it to setResult().

On returning back to calling Activity you can get data by overriding:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(resultCode == RESULT_OK){
        //Get data from Intent "data" and do your task here....
    }
}

Note: You can pass primitive data type values thru Intent and if you want to pass other types then you have to use Bundle like this.

Bundle data = new Bundle();
data.putIntArray(key, value);

//same way you can set other values....... //Now set this Bundle value to Intent as you do for primitive type....

Intent intent = new Intent(context, CalledActivity.class);
intent.putExtra(data);
startActivity(intent);

Receiving data in Activity:

//For primitive values:

DataType var_name = getIntent().getExtras().get(key);

//For Bundle values:

Bundle var_name = getIntent().getExtras().getBundle(key);