Android cannot find method from button's onClick in ListView Row

Question

I have a ListView populated from a custom adapter. Each row has 1 button in it. In the xml the button has the onClick attribute passed. I have only the xml, not any OnClickL

Answer 1

It’s important that MyActivity and getContext() of CustomAdapter must be the same instance. Compare yours with mine.

My codes:

MyActivity.java

public class MyActivity extends Activity {
    public static final String TAG = "MyActivity";
    private ListView mListView;
    private CustomAdapter mAdapter;
    private ArrayList mData;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        mListView = (ListView) findViewById(R.id.listView);

        mData = new ArrayList();
        mData.add("111");
        mData.add("222");
        mData.add("333");
        mData.add("444");
        mData.add("555");

        mAdapter = new CustomAdapter(this, R.layout.list_item_view, mData);
        mListView.setAdapter(mAdapter);
    }

    public void onClickHandler(View view) {
        Log.i(TAG, "onClickHandler()");
    }
}

CustomAdapter.java

public class CustomAdapter extends ArrayAdapter {

    public CustomAdapter(Context context, int resource, ArrayList objects) {
        super(context, resource, objects);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = inflater.inflate(R.layout.list_item_view, null);
        }

        return convertView;
    }
}

activity_my.xml

list_item_view.xml