Android Open Source - android-for-dummies-v3 Task List Fragment

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Back to project page android-for-dummies-v3.

License

The source code is released under:

Apache License

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Java Source Code

package com.dummies.tasks.fragment;
/*from   w  w w  . j  a  v  a2s  . c o  m*/
import android.app.Fragment;
import android.app.LoaderManager;
import android.content.CursorLoader;
import android.content.Intent;
import android.content.Loader;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;

import com.dummies.tasks.R;
import com.dummies.tasks.activity.PreferencesActivity;
import com.dummies.tasks.adapter.TaskListAdapter;
import com.dummies.tasks.interfaces.OnEditTask;
import com.dummies.tasks.provider.TaskProvider;

public class TaskListFragment extends Fragment implements
        LoaderManager.LoaderCallbacks<Cursor> {

    TaskListAdapter adapter;
    RecyclerView recyclerView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        adapter = new TaskListAdapter();

        getLoaderManager().initLoader(0, null, this);
    }

    @Override
    public View onCreateView(LayoutInflater inflater,
                             ViewGroup container,
                             Bundle savedInstanceState) {

        final View v = inflater.inflate(R.layout.fragment_task_list,
                container, false);
        recyclerView = (RecyclerView) v.findViewById(R.id.recycler);
        recyclerView.setAdapter(adapter);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(
                new LinearLayoutManager(getActivity()));
        return v;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        setHasOptionsMenu(true);
    }


    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);
        inflater.inflate(R.menu.menu_list, menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.menu_insert:
                ((OnEditTask) getActivity()).editTask(0);
                return true;
            case R.id.menu_settings:
                startActivity(new Intent(getActivity(),
                        PreferencesActivity.class));
                return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public Loader<Cursor> onCreateLoader(int ignored, final Bundle args) {
        return new CursorLoader(getActivity(),
                TaskProvider.CONTENT_URI, null, null,
                null, null);
    }

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
        adapter.swapCursor(cursor);
    }

    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        // This is called when the last Cursor provided to
        // onLoadFinished()
        // above is about to be closed. We need to make sure we are no
        // longer using it.
        adapter.swapCursor(null);
    }
}

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