所以我有这个代码，这是一个带有ListView搜索字段的页面和一个确认搜索的按钮，当按下按钮时，ListView充满了来自烂番茄的电影名称API，问题是有人帮我这个代码，我希望有一些帮助分解并逐句理解它，我的主要目标是获得“标题”，“概要”和“网址图像“在列表中点击了一部电影，并将其传递给了我的其他活动，但整个JSON并获得了特定的数据，让我非常困惑。
Link to Rotten Tomatoes API documentation，这是我的代码：
public class MovieAddFromWeb extends Activity implements View.OnClickListener,
OnItemClickListener {
private TextView searchBox;
private Button bGo, bCancelAddFromWeb;
private ListView moviesList;
public List<String> movieTitles;
static final int ACTIVITY_WEB_ADD = 3;
// the Rotten Tomatoes API key
private static final String API_KEY = "8q6wh77s65aw435cab9rbzsq";
// the number of movies to show in the list
private static final int MOVIE_PAGE_LIMIT = 8;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.movie_add_from_web);
InitializeVariables();
}
/*
* Initializing the variables and creating the bridge between the views from
* the xml file and this class
*/
private void InitializeVariables() {
searchBox = (EditText) findViewById(R.id.etSearchBox);
bGo = (Button) findViewById(R.id.bGo);
bCancelAddFromWeb = (Button) findViewById(R.id.bCancelAddFromWeb);
moviesList = (ListView) findViewById(R.id.list_movies);
bGo.setOnClickListener(this);
bCancelAddFromWeb.setOnClickListener(this);
moviesList.setOnItemClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.bGo:
new RequestTask()
.execute("http://api.rottentomatoes.com/api/public/v1.0/movies.json?apikey="
+ API_KEY
+ "&q="
+ searchBox.getText()
+ "&page_limit=" + MOVIE_PAGE_LIMIT);
break;
case R.id.bCancelAddFromWeb:
finish();
break;
}
}
private void refreshMoviesList(List<String> movieTitles) {
moviesList.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, movieTitles
.toArray(new String[movieTitles.size()])));
}
private class RequestTask extends AsyncTask<String, String, String> {
// make a request to the specified url
@Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
// make a HTTP request
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else {
// close connection
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (Exception e) {
Log.d("Test", "Couldn't make a successful request!");
}
return responseString;
}
@Override
protected void onPostExecute(String response) {
super.onPostExecute(response);
try {
// convert the String response to a JSON object
JSONObject jsonResponse = new JSONObject(response);
// fetch the array of movies in the response
JSONArray jArray = jsonResponse.getJSONArray("movies");
// add each movie's title to a list
movieTitles = new ArrayList<String>();
for (int i = 0; i < jArray.length(); i++) {
JSONObject movie = jArray.getJSONObject(i);
movieTitles.add(movie.getString("title"));
}
// refresh the ListView
refreshMoviesList(movieTitles);
} catch (JSONException e) {
Log.d("Test", "Couldn't successfully parse the JSON response!");
}
}
}
@Override
public void onItemClick(AdapterView<?> av, View view, int position, long id) {
Intent openMovieEditor = new Intent(this, MovieEditor.class);
openMovieEditor.putExtra("movieTitle", movieTitles.get(position));
openMovieEditor.putExtra("callingActivity", ACTIVITY_WEB_ADD);
startActivityForResult(openMovieEditor, ACTIVITY_WEB_ADD);
}
}
答案 0 :(得分：3)
请参阅下面的修改后的代码..
public class MovieAddFromWeb extends Activity implements View.OnClickListener, OnItemClickListener {
private TextView searchBox;
private Button bGo, bCancelAddFromWeb;
private ListView moviesList;
public List<String> movieTitles;
//added new variables
public List<String> movieSynopsis;
public List<String> movieImgUrl;
static final int ACTIVITY_WEB_ADD = 3;
// the Rotten Tomatoes API key
private static final String API_KEY = "8q6wh77s65aw435cab9rbzsq";
// the number of movies to show in the list
private static final int MOVIE_PAGE_LIMIT = 8;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.movie_add_from_web);
InitializeVariables();
}
/*
* Initializing the variables and creating the bridge between the views from
* the xml file and this class
*/
private void InitializeVariables() {
searchBox = (EditText) findViewById(R.id.etSearchBox);
bGo = (Button) findViewById(R.id.bGo);
bCancelAddFromWeb = (Button) findViewById(R.id.bCancelAddFromWeb);
moviesList = (ListView) findViewById(R.id.list_movies);
bGo.setOnClickListener(this);
bCancelAddFromWeb.setOnClickListener(this);
moviesList.setOnItemClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.bGo:
new RequestTask()
.execute("http://api.rottentomatoes.com/api/public/v1.0/movies.json?apikey="
+ API_KEY
+ "&q="
+ searchBox.getText()
+ "&page_limit=" + MOVIE_PAGE_LIMIT);
break;
case R.id.bCancelAddFromWeb:
finish();
break;
}
}
private void refreshMoviesList(List<String> movieTitles) {
moviesList.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, movieTitles
.toArray(new String[movieTitles.size()])));
}
private class RequestTask extends AsyncTask<String, String, String> {
// make a request to the specified url
@Override
protected String doInBackground(String... uri) {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response;
String responseString = null;
try {
// make a HTTP request
response = httpclient.execute(new HttpGet(uri[0]));
StatusLine statusLine = response.getStatusLine();
if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
ByteArrayOutputStream out = new ByteArrayOutputStream();
response.getEntity().writeTo(out);
out.close();
responseString = out.toString();
} else {
// close connection
response.getEntity().getContent().close();
throw new IOException(statusLine.getReasonPhrase());
}
} catch (Exception e) {
Log.d("Test", "Couldn't make a successful request!");
}
return responseString;
}
@Override
protected void onPostExecute(String response) {
super.onPostExecute(response);
try {
// convert the String response to a JSON object
JSONObject jsonResponse = new JSONObject(response);
// fetch the array of movies in the response
JSONArray jArray = jsonResponse.getJSONArray("movies");
// add each movie's title to a list
movieTitles = new ArrayList<String>();
//newly added
movieSynopsis = new ArrayList<String>();
movieImgUrl= new ArrayList<String>();
for (int i = 0; i < jArray.length(); i++) {
JSONObject movie = jArray.getJSONObject(i);
movieTitles.add(movie.getString("title"));
movieSynopsis.add(movie.getString(#add the synopsis var name returned by the JSON));
movieImgUrl.add(movie.getString(#add the urlvar name returned by the JSON));
}
// refresh the ListView
refreshMoviesList(movieTitles);
} catch (JSONException e) {
Log.d("Test", "Couldn't successfully parse the JSON response!");
}
}
}
@Override
public void onItemClick(AdapterView<?> av, View view, int position, long id) {
Intent openMovieEditor = new Intent(this, MovieEditor.class);
openMovieEditor.putExtra("movieTitle", movieTitles.get(position));
//newly added
openMovieEditor.putExtra("movieSynopsis", movieSynopsis.get(position));
openMovieEditor.putExtra("movieImgUrl", movieImgUrl.get(position));
openMovieEditor.putExtra("callingActivity", ACTIVITY_WEB_ADD);
startActivityForResult(openMovieEditor, ACTIVITY_WEB_ADD);
}