Another class calls the GridView class below that is populated with images from a parse server, if a user clicks on a grid item, it starts the same GridView class with different bundled strings so it can pull from a different parse database class. Now at this point, when a user clicks an GridView item (from the 2nd gridview that was set up), I want it to start a different activity class.
I tried doing an if/else if statement in the onItemClick that takes the "PARSE_CLASS" bundled string but I can't seem to get that to work. I'm relatively new to android programming so I don't know the best way to do this.
public class DisplayGrid extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
GridView gridView = null;
List<ParseObject> obj;
ProgressDialog loadProgress;
GridViewAdapter adapter;
Bundle extras = new Bundle();
GridViewAdapter itemGridAdapter;
private List<ImageList> imageArrayList = null;
private List<String> categoryNameArrayList = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.ws_display_grid);
imageArrayList = new ArrayList<ImageList>();
categoryNameArrayList = new ArrayList<String>();
gridView = (GridView) findViewById(R.id.gridView);
itemGridAdapter = new GridViewAdapter(DisplayGrid.this, imageArrayList);
gridView.setAdapter(itemGridAdapter);
new RemoteDataTask().execute();
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
Intent i = getIntent();
Bundle itemExtras = i.getExtras();
final String activeSupplier = itemExtras.getString("SUPPLIER");
String parseClass = extras.getString("PARSE_CLASS");
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position,
long arg3) {
Intent t = new Intent(getApplicationContext(), DisplayGrid.class);
extras.putString("SUPPLIER", activeSupplier);
extras.putString("PARSE_CLASS", "Items");
t.putExtras(extras);
startActivity(t);
}
});
}//end onCreate method
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
@Override
public void onStart() {
super.onStart();
}
@Override
public void onStop() {
super.onStop();
}
//RemoteDataTask
private class RemoteDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
loadProgress = new ProgressDialog(DisplayGrid.this);
loadProgress.setTitle("Images");
loadProgress.setMessage("Loading...");
loadProgress.setIndeterminate(false);
loadProgress.show();
}
@Override
protected Void doInBackground(Void... params) {
try {
Intent i = getIntent();
Bundle extras = i.getExtras();
String parseClass = extras.getString("PARSE_CLASS");
String activeSupplier = extras.getString("SUPPLIER");
String category;
ParseQuery<ParseObject> query = new ParseQuery<>(parseClass);
query.whereEqualTo("username", activeSupplier);
obj = query.find();
if (parseClass == "Items") {
category = extras.getString("CATEGORY");
query.whereEqualTo("category", category);
}
for (ParseObject categories : obj) {
//get image
ParseFile image = (ParseFile) categories.get("image");
ImageList gridBlock = new ImageList();
gridBlock.setImage(image.getUrl());
imageArrayList.add(gridBlock);
Log.i("AppInfo", "image sent to imageArrayList");
String categoryName = null;
//get category name
if (categoryName == null) {
} else {
categoryName = categories.getString("categoryName");
categoryNameArrayList.add(categoryName);
Log.i("AppInfo", categoryName);
}
}
} catch (ParseException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
gridView = (GridView) findViewById(R.id.gridView);
adapter = new GridViewAdapter(DisplayGrid.this, imageArrayList);
gridView.setAdapter(adapter);
loadProgress.dismiss();
Log.i("AppInfo", "CategoryGrid Populated");
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == RESULT_OK && data != null) {
Uri selectedImage = data.getData();
try {
Bitmap bitmapImage =
MediaStore.Images.Media.getBitmap
(this.getContentResolver(), selectedImage);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmapImage.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
//convert to parse file
ParseFile file = new ParseFile("Img.png", byteArray);
ParseObject object = new ParseObject("Categories");
object.put("username", ParseUser.getCurrentUser().getUsername());
object.put("image", file);
object.saveInBackground(new SaveCallback() {
@Override
public void done(ParseException e) {
if (e == null) {
Toast.makeText(getApplication().getBaseContext(), "Your image has been saved", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplication().getBaseContext(), "Upload failed, please try again", Toast.LENGTH_SHORT).show();
}
}
});
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(getApplication().getBaseContext(), "Upload failed, please try again", Toast.LENGTH_SHORT).show();
}
}
}
//begin getTitle method
//begin createMenu
@Override
public boolean onCreateOptionsMenu(Menu menu) {
new MenuInflater(getApplication())
.inflate(R.menu.options, menu);
return (super.onCreateOptionsMenu(menu));
}
//end createMenu
//begin onOptionsItemSelected
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.manufacturers) {
Intent i = new Intent(getApplicationContext(), SupplierList.class);
startActivity(i);
return true;
} else if (item.getItemId() == R.id.add) {
Intent i = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, 1);
return true;
} else if (item.getItemId() == R.id.sign_out) {
ParseUser.logOut();
Intent i = new Intent(getApplicationContext(), MainActivity.class);
startActivity(i);
return true;
}
return (super.onOptionsItemSelected(item));
}
//end onOptionsItemSelected
}
This is what I tried. When I tried this, the second GridView wouldn't load. So I'm guessing I'm unable to retrieve the "PARSE_CLASS" bundled string the second time around.
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
Intent i = getIntent();
Bundle itemExtras = i.getExtras();
final String activeSupplier = itemExtras.getString("SUPPLIER");
String parseClass = extras.getString("PARSE_CLASS");
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position,
long arg3) {
if (parseClass == "Categories") {
Intent t = new Intent(getApplicationContext(), DisplayGrid.class);
extras.putString("SUPPLIER", activeSupplier);
extras.putString("PARSE_CLASS", "Items");
t.putExtras(extras);
startActivity(t);
} else if(parseClass == "Items"){
Intent t = new Intent(getApplicationContext(), ItemDisplay.class);
//extras.putString("SUPPLIER", activeSupplier);
//extras.putString("PARSE_CLASS", "Items");
//t.putExtras(extras);
startActivity(t);
}
}
});
ANSWER Someone on reddit's learn programming was nice enough to point out that I had an issue with string comparisons. had to use
if(parseClass.equals("Categories")){}
instead of
if(parseClass == "Categories"){}
I feel like an idiot, hopefully someone else benefits from this long disastrous effort.
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
Intent t = getIntent();
Bundle itemExtras = t.getExtras();
String activeSupplier = itemExtras.getString("SUPPLIER");
String parseClass = itemExtras.getString("PARSE_CLASS");
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position,
long arg3) {
Log.i("AppInfo", parseClass);
if (parseClass.equals("Categories")) {
Log.i("AppInfo", parseClass);
Intent t = new Intent(getApplicationContext(), DisplayGrid.class);
String categoryName = categoryNameArrayList.get(position);
itemExtras.putString("SUPPLIER", activeSupplier);
itemExtras.putString("PARSE_CLASS", "Items");
itemExtras.putString("CATEGORY_NAME", categoryName);
t.putExtras(itemExtras);
startActivity(t);
} else if (parseClass.equals("Items")) {
Intent t = new Intent(getApplicationContext(), ItemDisplay.class);
//extras.putString("SUPPLIER", activeSupplier);
//extras.putString("PARSE_CLASS", "Items");
//t.putExtras(extras);
startActivity(t);
}
}
});
