I am integrating the zxing scanner into my android application and I am coming across a weird situation where the onActivityResult (in the activity initiating the scan) is being called before the scanning intent opens. I have looked at several examples and my code seems to match what I am seeing in many of the tutorials. Here is the code for the activity.
package com.honeydewit;
import java.util.ArrayList;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.google.zxing.integration.android.IntentIntegrator;
import com.google.zxing.integration.android.IntentResult;
import com.honeydewit.adapters.ListItemAdapter;
import com.honeydewit.listeners.OneOffClickListener;
import com.honeydewit.pojos.BasicList;
import com.honeydewit.pojos.ListItem;
public class ListHomeActivity extends BasicActivity{
private ImageButton addItemBtn;
private ImageButton addByScanBtn;
private ArrayList<ListItem> lists = new ArrayList<ListItem>();
public static ListItemAdapter listAdapter;
private TextView headerTxt;
private BasicList basicList;
private ListView listView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listshome);
listView =(ListView) findViewById(R.id.list);
basicList = getApplicationContext().getCurrentList();
headerTxt = (TextView)findViewById(R.id.headerTxt);
headerTxt.setText(basicList.getName());
headerTxt.setTypeface(getApplicationContext().getTypeface());
//add button
addItemBtn = (ImageButton)findViewById(R.id.add);
addItemBtn.setOnClickListener(new OneOffClickListener() {
@Override
public void onClick(View v) {
addToList(v, basicList);
}
});
addByScanBtn = (ImageButton)findViewById(R.id.addByScan);
addByScanBtn.setVisibility(View.VISIBLE);
addByScanBtn.setOnClickListener(new OneOffClickListener() {
@Override
public void onClick(View v) {
addToListByScan(v, basicList);
}
});
setupListAdapter(basicList.get_id());
}
private void setupListAdapter(int listId) {
populateListItems(listId);
listAdapter = new ListItemAdapter(this, R.layout.listrow, lists);
listView.setAdapter(listAdapter);
}
private void populateListItems(int listId) {
ArrayList<ListItem> items = (ArrayList<ListItem>)getApplicationContext().getShoppingListDbHelper().getShoppingListItems(listId);
for(ListItem item : items ) {
lists.add(item);
}
}
private void addToList(View view, BasicList list) {
if(basicList.getListTypeId() == Constants.TODO_LIST_TYPE_CDE) {
Intent newListIntent = new Intent(getBaseContext(), ToDoItemActivity.class);
startActivityForResult(newListIntent, 1);
}
else {
Intent newListIntent = new Intent(getBaseContext(), ItemActivity.class);
startActivityForResult(newListIntent, 1);
}
}
private void addToListByScan(View view, BasicList list) {
try {
IntentIntegrator zxingIntegrator = new IntentIntegrator(this);
zxingIntegrator.initiateScan();
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "ERROR:" + e, 1).show();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
Log.d(getClass().getName(), scanResult.getContents());
Log.d(getClass().getName(), scanResult.getFormatName());
Log.d(getClass().getName(),data.getStringExtra("SCAN_RESULT_FORMAT"));
Log.d(getClass().getName(),data.getStringExtra("SCAN_RESULT"));
}
}
}
}
