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Added Loader<Cursor> to DiscoverFragment

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This commit is contained in:
Aargonian
2016-02-25 16:46:13 -05:00
parent f7e8446eb3
commit e3fede66b2
4 changed files with 90 additions and 92 deletions
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2
app/src/androidTest/java/com/example/android/popularmovies/data/TestProvider.java
View File

@@ -140,7 +140,7 @@ public class TestProvider extends AndroidTestCase {
Cursor cursor = mContext.getContentResolver().query(
MovieEntry.CONTENT_URI,
null, // projection
null, // movieProjection
MovieEntry.COLUMN_TMDB_ID + " = " + movieTMDBId,
null, // Values for the "where" clause
null // sort order

91
app/src/main/java/com/example/android/popularmovies/DiscoverFragment.java
View File

@@ -2,8 +2,12 @@ package com.example.android.popularmovies;
import android.content.Context;
import android.content.res.Resources;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.DisplayMetrics;
@@ -13,6 +17,9 @@ import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import com.example.android.popularmovies.data.MovieContract;
import com.example.android.popularmovies.data.MovieUtil;
import butterknife.Bind;
import butterknife.ButterKnife;
@@ -20,18 +27,17 @@ import butterknife.ButterKnife;
/**
* Created by Aaron Helton on 1/30/2016
*/
public class DiscoverFragment extends Fragment implements MovieAdapter.MovieItemClickListener
public class DiscoverFragment extends Fragment
implements MovieAdapter.MovieItemClickListener, LoaderManager.LoaderCallbacks<Cursor>
{
//Neglecting use of ButterKnife for this fragment, only one findViewById() is used.
private static final String LOG_TAG = DiscoverFragment.class.getSimpleName();
private static final Integer PREFERRED_COLUMN_WIDTH = 100;
private static final Integer MOVIE_LOADER = 0;
private OnMovieSelectedListener mListener;
private RecyclerView mMoviesGridView;
private MovieAdapter mAdapter;
private String sort;
private boolean loadingMovies;
private int currentPage;
@Bind(R.id.movieContainer) FrameLayout movieContainer;
@@ -49,6 +55,13 @@ public class DiscoverFragment extends Fragment implements MovieAdapter.MovieItem
sort = Utility.getSort(getActivity());
}
@Override
public void onActivityCreated(Bundle state)
{
super.onActivityCreated(state);
getLoaderManager().initLoader(MOVIE_LOADER, null, this);
}
public void onSaveInstanceState(Bundle bundle)
{
super.onSaveInstanceState(bundle);
@@ -79,22 +92,6 @@ public class DiscoverFragment extends Fragment implements MovieAdapter.MovieItem
}
}
};
mMoviesGridView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
int visibleItemCount = recyclerView.getLayoutManager().getChildCount();
int totalItemCount = recyclerView.getLayoutManager().getItemCount();
int pastVisiblesItems =
((GridLayoutManager) recyclerView.getLayoutManager())
.findFirstVisibleItemPosition();
if (!loadingMovies) {
if ((visibleItemCount + pastVisiblesItems) >= totalItemCount) {
addMovies();
}
}
}
});
mMoviesGridView.setLayoutParams(new RecyclerView.LayoutParams(
RecyclerView.LayoutParams.MATCH_PARENT,
RecyclerView.LayoutParams.MATCH_PARENT));
@@ -105,7 +102,7 @@ public class DiscoverFragment extends Fragment implements MovieAdapter.MovieItem
mMoviesGridView.setLayoutManager(mManager);
mMoviesGridView.setAdapter(mAdapter);
movieContainer.addView(mMoviesGridView);
addMovies();
updateMovies();
if(savedInstanceState != null)
mMoviesGridView.setVerticalScrollbarPosition(savedInstanceState.getInt("SCROLL_POS"));
return root;
@@ -116,9 +113,9 @@ public class DiscoverFragment extends Fragment implements MovieAdapter.MovieItem
{
super.onResume();
if(!sort.equals(Utility.getSort(getActivity()))) {
mAdapter.emptyDataset();
getLoaderManager().restartLoader(MOVIE_LOADER, null, this);
currentPage = 1;
addMovies();
updateMovies();
}
}
@@ -128,28 +125,9 @@ public class DiscoverFragment extends Fragment implements MovieAdapter.MovieItem
mListener.onMovieSelected(id);
}
public void addMovies() {
if(currentPage < 11)
{
loadingMovies = true;
DiscoverTask task = new DiscoverTask(this.getActivity()) {
@Override
public void onProgressUpdate(String... update)
{
if(update.length == 2)
{
mAdapter.addMovie(Long.parseLong(update[0]), update[1]);
}
}
@Override
public void onPostExecute(Void result) {
loadingMovies = false;
}
};
Log.d(LOG_TAG, "CURRENT PAGE: " + currentPage);
task.execute(currentPage++);
}
public void updateMovies() {
DiscoverTask task = new DiscoverTask(this.getActivity());
task.execute(currentPage++);
}
@Override
@@ -169,6 +147,29 @@ public class DiscoverFragment extends Fragment implements MovieAdapter.MovieItem
mListener = null;
}
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
String sort = Utility.getSort(getActivity());
if(sort.equalsIgnoreCase(getString(R.string.pref_sort_popularity_value)))
sort = MovieContract.MovieEntry.COLUMN_POPULARITY + " DESC";
else if (sort.equalsIgnoreCase(getString(R.string.pref_sort_rating_value)))
sort = MovieContract.MovieEntry.COLUMN_RATING + " DESC";
return new CursorLoader(getActivity(), MovieContract.MovieEntry.CONTENT_URI,
MovieUtil.movieProjection, null, null, sort);
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
mAdapter.setDataset(data);
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
mAdapter.setDataset(null);
}
public interface OnMovieSelectedListener {
void onMovieSelected(Long id);
}

63
app/src/main/java/com/example/android/popularmovies/MovieAdapter.java
View File

@@ -1,6 +1,6 @@
package com.example.android.popularmovies;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.support.v7.widget.RecyclerView;
import android.view.View;
@@ -9,41 +9,31 @@ import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import com.example.android.popularmovies.data.FileUtils;
import java.util.ArrayList;
import com.example.android.popularmovies.data.MovieContract;
/**
* Created by Aaron Helton on 1/30/2016
*/
public class MovieAdapter extends RecyclerView.Adapter<MovieAdapter.ViewHolder>
{
@SuppressWarnings("unused")
private static final String LOG_TAG = MovieAdapter.class.getSimpleName();
//Struct-like class for inner use
private static class MovieReference {
public final Long id;
public final Bitmap poster;
public MovieReference(Long id, Bitmap poster) {
this.id = id;
this.poster = poster;
}
}
public interface MovieItemClickListener
{
void movieClicked(Long movieID);
}
private ArrayList<MovieReference> dataset;
private Cursor dataset;
private MovieItemClickListener listener;
private Context context;
public MovieAdapter() {
dataset = new ArrayList<>();
dataset = null;
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener
{
@SuppressWarnings("unused")
private final String LOG_TAG = ViewHolder.class.getName();
public ImageView imageView;
@@ -57,8 +47,12 @@ public class MovieAdapter extends RecyclerView.Adapter<MovieAdapter.ViewHolder>
@Override
public void onClick(View v) {
if(listener != null) {
MovieReference reference = dataset.get(this.getLayoutPosition());
listener.movieClicked(reference.id);
if(dataset != null) {
dataset.moveToPosition(this.getLayoutPosition());
long id = dataset.getLong(
dataset.getColumnIndex(MovieContract.MovieEntry.COLUMN_TMDB_ID));
listener.movieClicked(id);
}
}
}
}
@@ -81,28 +75,29 @@ public class MovieAdapter extends RecyclerView.Adapter<MovieAdapter.ViewHolder>
@Override
public void onBindViewHolder(ViewHolder holder, int position)
{
MovieReference movie = dataset.get(position);
if(movie != null) {
holder.imageView.setImageBitmap(movie.poster);
if(dataset != null) {
dataset.moveToPosition(position);
Bitmap poster = FileUtils.getImage(
dataset.getString(
dataset.getColumnIndex(MovieContract.MovieEntry.COLUMN_IMG_PATH)));
if (poster != null) {
holder.imageView.setImageBitmap(poster);
}
}
}
public void addMovie(long movieId, String imagePath)
{
MovieReference reference =
new MovieReference(movieId, FileUtils.getImage(imagePath));
dataset.add(reference);
notifyItemInserted(dataset.size() - 1);
}
@Override
public int getItemCount() {
return dataset.size();
if(dataset != null) {
return dataset.getCount();
} else {
return 0;
}
}
public final void emptyDataset() {
int prevSize = dataset.size();
dataset.clear();
notifyItemRangeRemoved(0, prevSize);
public void setDataset(Cursor cursor)
{
this.dataset = cursor;
this.notifyDataSetChanged();
}
}

26
app/src/main/java/com/example/android/popularmovies/data/MovieUtil.java
View File

@@ -31,7 +31,8 @@ public final class MovieUtil
public static final String TMDB_URL_BASE = "http://api.themoviedb.org/3";
public static final String TMDB_POSTER_URL = "http://image.tmdb.org/t/p/w185";
private static final String[] projection = {
public static final String[] movieProjection = {
MovieContract.MovieEntry.COLUMN_TMDB_ID,
MovieContract.MovieEntry.COLUMN_TITLE,
MovieContract.MovieEntry.COLUMN_DESC,
MovieContract.MovieEntry.COLUMN_IMG_PATH,
@@ -44,22 +45,23 @@ public final class MovieUtil
MovieContract.MovieEntry.COLUMN_FAVORITE
};
@SuppressWarnings("all") private static final int TITLE = 0;
@SuppressWarnings("all") private static final int OVERVIEW = 1;
@SuppressWarnings("all") private static final int IMG_PATH = 2;
@SuppressWarnings("all") private static final int RELEASE = 3;
@SuppressWarnings("all") private static final int RUNTIME = 4;
@SuppressWarnings("all") private static final int RATING = 5;
@SuppressWarnings("all") private static final int POPULARITY = 6;
@SuppressWarnings("all") private static final int VOTE_COUNT = 7;
@SuppressWarnings("all") private static final int GENRES = 8;
@SuppressWarnings("all") private static final int FAVORITE = 9;
@SuppressWarnings("all") public static final int TMDB_ID = 0;
@SuppressWarnings("all") public static final int TITLE = 1;
@SuppressWarnings("all") public static final int OVERVIEW = 2;
@SuppressWarnings("all") public static final int IMG_PATH = 3;
@SuppressWarnings("all") public static final int RELEASE = 4;
@SuppressWarnings("all") public static final int RUNTIME = 5;
@SuppressWarnings("all") public static final int RATING = 6;
@SuppressWarnings("all") public static final int POPULARITY = 7;
@SuppressWarnings("all") public static final int VOTE_COUNT = 8;
@SuppressWarnings("all") public static final int GENRES = 9;
@SuppressWarnings("all") public static final int FAVORITE = 10;
public static MovieInfo getMovie(@NonNull Context context, Long movieID)
{
Cursor cursor = context.getContentResolver().query(
MovieContract.MovieEntry.CONTENT_URI,
projection,
movieProjection,
MovieContract.MovieEntry.COLUMN_TMDB_ID + " = ?",
new String[]{Long.toString(movieID)},
null