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我建立在主面板上的GridView控件顯示電影這部電影的應用程序後，GridView控件不刷新，然後我可以點擊他們，並顯示有關該電影的一些信息，我也有一些設置更改的標準顯示的電影：熱門，最受好評或最愛。收藏夾是保存在用戶選擇的sharedPreferences中的本地集合。
下面是在這一切發生的情況：改變設置
public class MovieFragment extends Fragment{
public String[][] matrixMoviesInfo;
public GridView gridView;
public String[] mArrayImages;
private String baseUrl;
private String apiKey;
public MovieFragment(){
matrixMoviesInfo = new String[20][10];
mArrayImages = new String[20];
baseUrl = "http://api.themoviedb.org/3/movie/";
apiKey = "?api_key=37068e0a72b2cc1751b4246899923ba7";
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
return super.onOptionsItemSelected(item);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
gridView = (GridView) rootView.findViewById(R.id.gridview);
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
Intent intent = new Intent(getActivity(), DetailActivity.class)
.putExtra(Intent.EXTRA_TEXT, matrixMoviesInfo[position]);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
}
});
return rootView;
}
private void setImages() {
for(int i=0;i<mArrayImages.length;i++){
if(matrixMoviesInfo[i][0]!=null) {
mArrayImages[i] = matrixMoviesInfo[i][0];
}
}
gridView.setAdapter(null);
gridView.setAdapter(new ImageAdapter(getActivity(), mArrayImages));
Log.v(null, "SETIMAGESCALLED");
}
private void updateMovies() {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());
String preference = prefs.getString(getString(R.string.pref_sortby_key), getString(R.string.pref_sortby_default));
if(preference.toLowerCase().equals("favorites")){
SharedPreferences preferences = getContext().getSharedPreferences("favorites_list", Context.MODE_PRIVATE);
Map<String, ?> allEntries = preferences.getAll();
String[] keyNames = new String[allEntries.size()];
Log.v(null,"SIZE: "+allEntries.size());
String[] keyValues;
int iterator=0;
for (Map.Entry<String, ?> entry : allEntries.entrySet()) {
Log.v("KEY: " +entry.getKey(), "VALUE: "+entry.getValue().toString());
}
for (Map.Entry<String, ?> entry : allEntries.entrySet()) {
if(entry.getKey()!=null) {
keyNames[iterator] = entry.getKey();
keyValues = entry.getValue().toString().split("#");
for (int i = 0; i < 10; i++) {
Log.v("INDEX: " + i, " VALUES: " + keyValues[i]);
matrixMoviesInfo[iterator][i] = keyValues[i];
}
iterator++;
}
}
setImages();
}else{
Log.v(null,"EXECUTETASK");
new FetchMoviesTask().execute(baseUrl+preference.toLowerCase()+apiKey, "i");
}
}
@Override
public void onStart() {
super.onStart();
updateMovies();
}
public class FetchMoviesTask extends AsyncTask<String, String, Void> {
private final String LOG_TAG = FetchMoviesTask.class.getSimpleName();
private Void getMovieDetailsFromJson(String movieJSONstr) throws JSONException {
final String OWM_RESULTS = "results";
final String OWM_ID = "id";
final String OWM_POSTERPATH = "poster_path";
final String OWM_TITLE = "original_title";
final String OWM_OVERVIEW = "overview";
final String OWM_USERRATING = "vote_average";
final String OWM_RELEASEDATE = "release_date";
JSONObject movieJson = new JSONObject(movieJSONstr);
JSONArray movieArray = movieJson.getJSONArray(OWM_RESULTS);
for(int i = 0; i < movieArray.length(); i++) {
JSONObject movieObj = movieArray.getJSONObject(i);
matrixMoviesInfo[i][0] = movieObj.getString(OWM_POSTERPATH);
matrixMoviesInfo[i][1] = movieObj.getString(OWM_ID);
matrixMoviesInfo[i][2] = movieObj.getString(OWM_TITLE);
matrixMoviesInfo[i][3] = movieObj.getString(OWM_OVERVIEW);
matrixMoviesInfo[i][4] = movieObj.getString(OWM_USERRATING);
matrixMoviesInfo[i][5] = movieObj.getString(OWM_RELEASEDATE);
}
for(int i=0;i<20;i++) {
new FetchMoviesTask().execute(baseUrl + matrixMoviesInfo[i][1] + "/reviews" + apiKey, Integer.toString(i));
new FetchMoviesTask().execute(baseUrl + matrixMoviesInfo[i][1] + "/videos" + apiKey, "v");
}
Log.v(null,"GETMOVIEDETAILS");
return null;
}
private Void getMovieReviewsFromJson(String movieJSONstr, String position) throws JSONException{
int pos = Integer.parseInt(position);
final String OWM_RESULTS = "results";
final String OWM_AUTHOR = "author";
final String OWM_CONTENT = "content";
final String OWM_TOTALRESULTS = "total_results";
JSONObject movieJson = new JSONObject(movieJSONstr);
JSONArray movieArray = movieJson.getJSONArray(OWM_RESULTS);
int numberOfResults = Integer.parseInt(movieJson.getString(OWM_TOTALRESULTS));
if(numberOfResults >= 1) {
matrixMoviesInfo[pos][6] = movieArray.getJSONObject(0).getString(OWM_AUTHOR);
matrixMoviesInfo[pos][7] = movieArray.getJSONObject(0).getString(OWM_CONTENT);
}
if(numberOfResults > 1) {
matrixMoviesInfo[pos][8] = movieArray.getJSONObject(1).getString(OWM_AUTHOR);
matrixMoviesInfo[pos][9] = movieArray.getJSONObject(1).getString(OWM_CONTENT);
}
return null;
}
private Void getMovieVideosFromJson(String movieJSONstr){
return null;
}
@Override
protected Void doInBackground(String... params) {
HttpURLConnection urlConnection = null;
BufferedReader reader = null;
String movieJSONstr = null;
try{
URL url = new URL(params[0]);
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){
movieJSONstr = null;
}
movieJSONstr = buffer.toString();
} catch (IOException e) {
Log.e(LOG_TAG, "Error ", e);
return null;
} finally{
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
Log.e("MovieFragment", "Error closing stream", e);
}
}
}
try{
if(params[1].equals("i")){
Log.v(null,"EXECUTEGETMOVIEDETAILS");
return getMovieDetailsFromJson(movieJSONstr);
}
else {
if (params[1].equals("v")){
return getMovieVideosFromJson(movieJSONstr);}
else{
return getMovieReviewsFromJson(movieJSONstr, params[1]);}
}
}catch (JSONException e) {
Log.e(LOG_TAG, e.getMessage(), e);
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
String[] mArrayImages = new String[20];
for(int i=0;i<20;i++){
mArrayImages[i] = matrixMoviesInfo[i][0];
}
gridView.setAdapter(new ImageAdapter(getActivity(), mArrayImages));
Log.v(null, "IMAGES SET GRIDVIEW REFRESHED");
}
}
類名說明：
有2條路徑：
熱門或TopRated：上方法UpdateMovies開始，然後執行的AsyncTask獲取從數據api，然後執行getMoviesFromJson來提取所有與所有電影相關的信息。然後它結束onPostExecute，用ImageAdapter填充gridview。
收藏夾：從方法UpdateMovies開始，在這裏它從sharedpreferences中獲取數據，並使用該數據填充數組，然後調用方法setImages以使用ImageAdapter填充gridView。
這是我的問題：當我顯示熱門電影並將設置更改爲收藏夾時，它會在sharedpreferences上顯示正確的電影，但不會從gridview中「清除」剩餘的電影。
此外，我怎麼能調整GridView控件的滾動來匹配它的細胞（在沒有電影來填充單元格，我隱藏它是這樣的：
imageView.setVisibility(View.GONE);
它不會做任何事情。 –