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POAndroid findViewById returns null when used in class other than main Activity
 

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  1. POAndroid findViewById returns null when used in class other than main Activity
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    <p>I am trying to get a TextView by ID in my listener class which handles a spinner's onItemSelected event. In my main Activity I can call findViewById(R.id.textView1) and it works fine. But if I call the same function in my spinner listener class it always returns null and forces the app to close.</p> <p>Anyone know why findViewById works in my main Activity but not in my listener class?</p> <p>Here is the code from my main activity. It is called when a button is clicked:</p> <pre><code>public void something () { setContentView(R.layout.spinnerLayout); Spinner spinner = (Spinner) findViewById(R.id.mySpinner); ArrayAdapter&lt;CharSequence&gt; adapter = ArrayAdapter.createFromResource( this, R.array.spinner_array, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); spinner.setOnItemSelectedListener(new MyOnItemSelectedListener()); } </code></pre> <p>And here is the code for MyOnItemSelectedListener:</p> <pre><code>public class MyOnItemSelectedListener implements OnItemSelectedListener { public void onItemSelected(AdapterView&lt;?&gt; parent, View view, int pos, long id) { TextView tv = view.findViewById(R.id.myTextView); // I want to set the text of this text view to the value selected using the spinner tv.setText("Something"); } public void onNothingSelected(AdapterView parent) { // Do nothing. } } </code></pre> <p>What do I need to do to get "TextView tv = view.findViewById(R.id.myTextView);" to work?</p> <p>Thanks!!!</p>
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