[android] Add filtering for RecyclerView

In previous post I made RecyclerView.

In this post, I'll add name filtering ability to RecyclerView.

First add EditText for user input.

	<EditText
	android:id="@+id/inputSearch"
	android:hint="@string/name_filter"
	android:layout_width="match_parent"
	android:layout_height="wrap_content"
	android:inputType="text" />

view raw EditText hosted with ❤ by GitHub

Use addTextChangedListener() for catch the change of EditText.

	mNameFilter = (EditText) findViewById(R.id.inputSearch);
	NameFilterWatcher nameFilterWatcher = new NameFilterWatcher();
	NameFilterWatcher.NameListChanger nameListChanger = new NameFilterWatcher.NameListChanger() {
	@Override
	public void changeNameList(String name) {
	new FilterNameTestDbTask().execute(name);
	}
	};
	nameFilterWatcher.setListChanger(nameListChanger);
	mNameFilter.addTextChangedListener(nameFilterWatcher);

view raw addTextChanageListener hosted with ❤ by GitHub

Do DbTask asynchronously.

	private class FilterNameTestDbTask extends AsyncTask<String, Void, Cursor> {
	@Override
	protected Cursor doInBackground(String... names) {
	Cursor cursor = new TestDb(getApplicationContext()).getNames(names[0]);
	mAdapter.setDataSet(cursor);
	return cursor;
	}
	@Override
	protected void onPostExecute(Cursor cursor) {
	super.onPostExecute(cursor);
	mAdapter.notifyDataSetChanged();
	}
	}

view raw DBTask hosted with ❤ by GitHub

This sample code is in GitHub.