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ArrayAdapterのPicasaを使用してGridViewに画像をアップロードしようとしています。誰でも私のコードで問題を見つけるのを助けてくれますか？今のところ私はリフレッシュボタンを使ってFetchWeatherTaskに電話しています。Picasaを使用してURLから画像を読み込んで
私の主な活動：
public class MainActivity extends AppCompatActivity {
private static final String MAINFRAGMENT_TAG = "MainFrgament";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActionBar menu = getSupportActionBar();
menu.setIcon(R.mipmap.ic_launcher);
menu.setDisplayShowHomeEnabled(true);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new MainFragment(), MAINFRAGMENT_TAG)
.commit();
}
}
}
フラグメント：
public class MainFragment extends Fragment {
static public PosterArrayAdapter adapter;
static public GridView movieGrid;
static public ArrayList<String> imagesPosters;
static public List<MovieClass> movies;
public MainFragment() {
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.refresh_menu, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int iD = item.getItemId();
if (iD == R.id.refresh) {
FetchMovieDataTask downloadTask = new FetchMovieDataTask();
downloadTask.execute("popularity.desc"); //second option is "rating.desc"
movieGrid.setAdapter(adapter);
return true;
}
return super.onOptionsItemSelected(item);
}
// onCreateView - main task UI happens here
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootview = inflater.inflate(R.layout.fragment_main, container, false);
movieGrid = (GridView) rootview.findViewById(R.id.movies_grid);
return rootview;
}
}
FetchMovieDataTask：
public class FetchMovieDataTask extends AsyncTask<String, Void, String> { /* last String refers to String beofre DoInBackground */
private final String MOVIEDATA_TAG = FetchMovieDataTask.class.getSimpleName();
String movieJSONStr = null;
@Override
protected String doInBackground(String... params) {
if (params.length == 0) {
return null;
}
HttpURLConnection urlConnection = null;
BufferedReader reader = null;
try {
final String FORECAST_BASE_URL = "http://api.themoviedb.org/3/discover/movie";
final String SORTBY_PARAM = "sort_by";
final String APPKEY_PARAM = "api_key";
Uri builtUri = Uri.parse(FORECAST_BASE_URL).buildUpon()
.appendQueryParameter(SORTBY_PARAM, params[0])
.appendQueryParameter(APPKEY_PARAM, BuildConfig.OPEN_MOVIES_API_KEY)
.build();
URL url = new URL(builtUri.toString());
Log.v(MOVIEDATA_TAG, "URL: " + builtUri.toString());
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
InputStream inputStream = urlConnection.getInputStream();
StringBuffer buffer = new StringBuffer();
if (inputStream == null) {
return null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
buffer.append(line + "\n");
}
if (buffer.length() == 0) {
return null;
}
movieJSONStr = buffer.toString();
Log.v(MOVIEDATA_TAG, "Data: " + movieJSONStr);
} catch (
IOException e
) {
Log.e("PlaceholderFragment", "Error ", e);
return null;
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
Log.e("PlaceholderFragment", "Error closing stream", e);
}
} try {
return String.valueOf(getMovieDataFromJson(movieJSONStr));
} catch (JSONException e) {
Log.e(MOVIEDATA_TAG, e.getMessage(), e);
e.printStackTrace();
}
return movieJSONStr;
}
}
/* JSON Parsing */
private ArrayList<String> getMovieDataFromJson(String movieJSONStr)
throws JSONException {
final String ORIGINAL_TITLE = "original_title";
final String POSTER_PATH = "poster_path";
final String PLOT_SYNOPSIS = "overview";
final String USER_RATING = "vote_average";
final String RELEASE_DATE = "release_date";
String BASIC_URL = "http://image.tmdb.org/t/p/w185/";
JSONObject movieJson = new JSONObject(movieJSONStr);
String movieInfo = movieJson.getString("results");
JSONArray movieArray = new JSONArray(movieInfo);
imagesPosters = new ArrayList<>(movieArray.length());
MovieClass movieClassItem = new MovieClass();
movies = new ArrayList<MovieClass>();
for (int i = 0; i < movieArray.length(); i++) {
JSONObject detail = movieArray.getJSONObject(i);
String original_title = detail.getString(ORIGINAL_TITLE);
String poster_path = detail.getString(POSTER_PATH);
String plot_synopsis = detail.getString(PLOT_SYNOPSIS);
String user_rating = detail.getString(USER_RATING);
String release_date = detail.getString(RELEASE_DATE);
movieClassItem.setPoster_path(poster_path);
imagesPosters.add("http://image.tmdb.org/t/p/w185/" + poster_path);
movies.add(movieClassItem);
}
for (String s : imagesPosters) {
Log.v(MOVIEDATA_TAG, "Path: " + s);
}
Log.v(MOVIEDATA_TAG, "Array"+ imagesPosters.toString());
return imagesPosters;
}
}
MovieClass：
public class MovieClass implements Parcelable {
String poster_path;
public MovieClass() {
}
private MovieClass(Parcel parcel){
poster_path = parcel.readString();
}
public String getPoster_path() {
return poster_path;
}
public void setPoster_path(String poster_path) {
this.poster_path = poster_path;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeString(this.poster_path);
}
public final Parcelable.Creator<MovieClass> CREATOR = new Parcelable.Creator<MovieClass>() {
@Override
public MovieClass createFromParcel(Parcel parcel) {
return new MovieClass(parcel);
}
@Override
public MovieClass[] newArray(int i) {
return new MovieClass[i];
}
};
}
カスタムArrayAdapter：
public class PosterArrayAdapter extends ArrayAdapter<MovieClass> {
private final String LOG_TAG = PosterArrayAdapter.class.getSimpleName();
public PosterArrayAdapter(Activity context, List<MovieClass> movieItems) {
super(context, 0, movieItems);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
MovieClass movie = getItem(position);
convertView = LayoutInflater.from(getContext()).inflate(R.layout.grid_view_item, parent, false);
ImageView imagePoster = (ImageView) convertView.findViewById(imageView);
Picasso.with(getContext()).load(imagesPosters.get(position)).into(imagePoster);
return convertView;
}
}
断片主レイアウト：
<?xml version="1.0" encoding="utf-8"?>
<GridView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:context="com.example.martyna.popularmovies.MainFragment"
android:id="@+id/movies_grid"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:numColumns="2"
android:verticalSpacing="0dp"
android:horizontalSpacing="0dp"
android:stretchMode="columnWidth"
android:gravity="center_horizontal" />
GridViewの項目のレイアウト：助けを
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:orientation="vertical"
android:layout_width="200dp"
android:layout_height="200dp"
android:id="@+id/imageView"
android:scaleType="centerCrop"
tools:ignore="ContentDescription" />
</FrameLayout>
ありがとう！
「movies = movieItems;」のように変更しましたそれはあなたが意味するものですか？私は「MovieItems = movieItems;」という部分を理解していないので？そして、残念ながらそれは働きたくありません:(私はそれを正しく呼んでいるかどうか分かりません。）努力して助けてくれてありがとう!!! –
はい私は同じことを意味しました。あなたはPicasso.load方法で）を割り当てた 例： 'Picasso.with（のgetContext（））負荷（movies.ImagePoster [位置]））imagePoster（へ;' は、それはあなたにこのに役立ちます願っています。。。時間： – Veswanth
私はこれを修正し、私もonPostExecuteメソッドを置く - おそらくそれも欠けていた:)ありがとうたくさんの再度！ –