One of the main reasons notifyDataSetChanged() won’t work for you – is, Your adapter loses reference to your list. When you first initialize the Adapter it takes a reference of your arrayList and passes it to its superclass. But if you reinitialize your existing arrayList it loses the reference, and hence, the communication channel with … Read more
Just pass in the current Context to the Adapter constructor and store it as a field. Then inside the onClick you can use that context to call startActivity(). pseudo-code public class MyAdapter extends Adapter { private Context context; public MyAdapter(Context context) { this.context = context; } public View getView(…){ View v; v.setOnClickListener(new OnClickListener() { void … Read more
I see these methods as a cleaner approach to accessing my list’s data. Instead of directly accessing my adapter object via something like myListData.get(position) i can simply call the adapter like adapter.get(position). The same goes for getItemId. Usually I would use this method when I want to execute some task based on the unique ID … Read more
There’s a combination of Federico’s and John’s answers. When: —-Shape— / \ Rectangle Circle / \ / \ BlueRectangle RedRectangle BlueCircle RedCircle Refactor to: —-Shape— Color / \ / \ Rectangle(Color) Circle(Color) Blue Red
So I finally got this to work. Here’s how i did it: I added: ListView lv = getListView(); lv.setFastScrollEnabled(true); lv.setScrollingCacheEnabled(true); to the onLoadFinished() method after the new cursor was swapped in like so public void onLoadFinished(Loader<Cursor> loader, Cursor data) { // Swap the new cursor in. (The framework will take care of closing the // … Read more
You need to do a few things: 1) In your activity, register for a text change listener on your EditText that contains the value the user enters: mSearchValue.addTextChangedListener(searchTextWatcher); 2) Create your searchTextWatcher and have it do something: private TextWatcher searchTextWatcher = new TextWatcher() { @Override public void onTextChanged(CharSequence s, int start, int before, int count) … Read more
Yes you can. In the adapter Add a new Field : private Context mContext; In the adapter Constructor add the following code : public AdapterName(……, Context context) { //your code. this.mContext = context; } In the getView(…) of Adapter: Button btn = (Button) convertView.findViewById(yourButtonId); btn.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View v) { if (mContext … Read more
Suppose your Spinner is named mSpinner, and it contains as one of its choices: “some value”. To find and compare the position of “some value” in the Spinner use this: String compareValue = “some value”; ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.select_state, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); mSpinner.setAdapter(adapter); if (compareValue != null) { int spinnerPosition = adapter.getPosition(compareValue); mSpinner.setSelection(spinnerPosition); }
I know the thread is old, but just in case… User object: public class User{ private int _id; private String _name; public User(){ this._id = 0; this._name = “”; } public void setId(int id){ this._id = id; } public int getId(){ return this._id; } public void setName(String name){ this._name = name; } public String getName(){ … Read more
I had the same issue. I was adding items to my ArrayList outside the UI thread. Solution: I have done both, adding the items and called notifyDataSetChanged() in the UI thread.