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我仍然沒有信心使用android，我在這裏有2個問題，我想使3個級別的多級recyclerView。第一級是類別RecyclerView，第二級是ListView和練習列表，第三級是細節。所以現在我做了一級recyclerView這是不可點擊的。另一個問題是如何在第二級獲取Listview到第三級的細節？這是我的第一級段的代碼：Android Json和RecyclerView不可點擊，MultiLevel問題
public class BallTrainingFragment extends Fragment {
View mRootView;
String URL_TO_HIT = "https://gist.githubusercontent.com/tomasmaks/afbf3e836dabd72c95c4b3ec90e291ed/raw/7ba41948865f78f1ccb4058c61f8c6e06c601300/BasketballTraining.json";
BallTrainingAdapter adapter;
RecyclerView mRecyclerView;
private List<BallTrainingModel> ballTraining;
GridLayoutManager mGridLayoutManager;
public BallTrainingFragment() {
// Required empty public constructor
}
public static BallTrainingFragment newInstance(int sectionNumber) {
BallTrainingFragment fragment = new BallTrainingFragment();
Bundle args = new Bundle();
args.putInt(Constants.ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Create default options which will be used for every
// displayImage(...) call if no options will be passed to this method
DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder()
.cacheInMemory(true)
.cacheOnDisk(true)
.build();
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getActivity().getApplicationContext())
.defaultDisplayImageOptions(defaultOptions)
.build();
ImageLoader.getInstance().init(config); // Do it on Application start
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
mRootView = inflater.inflate(R.layout.fragment_balltraining, container, false);
mRecyclerView = (RecyclerView) mRootView.findViewById(R.id.balltraining_list);
mRecyclerView.setHasFixedSize(true);
// Display under one column
mGridLayoutManager = new GridLayoutManager(getActivity(), 2);
mRecyclerView.setLayoutManager(mGridLayoutManager);
// Set orientation
mGridLayoutManager.setOrientation(GridLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(mGridLayoutManager);
return mRootView;
}
@Override
public void onStart() {
super.onStart();
new FetchBallTask().execute(URL_TO_HIT);
}
public class FetchBallTask extends AsyncTask<String, String, List<BallTrainingModel>> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected List<BallTrainingModel> doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuilder buffer = new StringBuilder();
String line ="";
while ((line = reader.readLine()) != null){
buffer.append(line);
}
String finalJson = buffer.toString();
JSONObject parentObject = new JSONObject(finalJson);
JSONArray parentArray = parentObject.optJSONArray("BasketballTraining");
List<BallTrainingModel> ballTrainingModelList = new ArrayList<>();
Gson gson = new Gson();
for(int i=0; i<parentArray.length(); i++) {
JSONObject finalObject = parentArray.getJSONObject(i);
/**
* below single line of code from Gson saves you from writing the json parsing yourself which is commented below
*/
BallTrainingModel ballTrainingModel = gson.fromJson(finalObject.toString(), BallTrainingModel.class);
ballTrainingModel.setCategory(finalObject.getString("category"));
ballTrainingModel.setThumbnail(finalObject.getString("thumb"));
List<BallTrainingModel.Cast> castList = new ArrayList<>();
for(int j=0; j<finalObject.getJSONArray("cast").length(); j++){
BallTrainingModel.Cast cast = new BallTrainingModel.Cast();
cast.setName(finalObject.getJSONArray("cast").getJSONObject(j).getString("name"));
castList.add(cast);
}
ballTrainingModel.setCastList(castList);
// adding the final object in the list
ballTrainingModelList.add(ballTrainingModel);
}
return ballTrainingModelList;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
if(connection != null) {
connection.disconnect();
}
try {
if(reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(final List<BallTrainingModel> result) {
super.onPostExecute(result);
if(result != null) {
adapter = new BallTrainingAdapter(getActivity().getApplicationContext(), R.layout.fragment_balltraining_content, result);
mRecyclerView.setAdapter(adapter);
mRecyclerView.setOnClickListener(new AdapterView.OnClickListener() {
@Override
public void onClick(View v) {
int position = mRecyclerView.indexOfChild(v);
BallTrainingModel ballTrainingModel = result.get(position);
Intent intent = new Intent(getActivity(), BallTrainingDetailsActivity.class);
intent.putExtra("ballTrainingModel", new Gson().toJson(ballTrainingModel));
getActivity().startActivity(intent);
}
});
} else {
Toast.makeText(getActivity().getApplicationContext(), "Not able to fetch data from server, please check url.", Toast.LENGTH_SHORT).show();
}
}
}
public class BallTrainingAdapter extends RecyclerView.Adapter<CustomViewHolder> {
private List<BallTrainingModel> ballTrainingList;
private int resource;
private LayoutInflater inflater;
public BallTrainingAdapter(Context context,int resource, List<BallTrainingModel> objects) {
ballTrainingList = objects;
this.resource = resource;
inflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public CustomViewHolder onCreateViewHolder(ViewGroup viewGroup, int position) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.fragment_balltraining_content, null);
CustomViewHolder viewHolder = new CustomViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(CustomViewHolder customViewHolder, int position) {
BallTrainingModel ballTraining = ballTrainingList.get(position);
ImageLoader.getInstance().displayImage(ballTrainingList.get(position).getThumbnail(), customViewHolder.thumbnail);
//Setting text view title
customViewHolder.textView.setText(ballTrainingList.get(position).getCategory());
}
@Override
public int getItemCount() {
return (null != ballTrainingList ? ballTrainingList.size() : 0);
}
}
public class CustomViewHolder extends RecyclerView.ViewHolder{
protected TextView textView;
protected ImageView thumbnail;
public CustomViewHolder(View view) {
super(view);
this.textView = (TextView) view.findViewById(R.id.category);
this.thumbnail = (ImageView) view.findViewById(R.id.thumbnail);
}
}
}
我認爲不可點擊的問題是在這行代碼：
mRecyclerView.setOnClickListener(new AdapterView.OnClickListener() {
@Override
public void onClick(View v) {
這裏是第二級片段，這應該呈現的ListView並可點擊到第三級細節。有人可以舉例說明如何做到這一點？
public class BallTrainingDetailsActivity extends ActionBarActivity {
private TextView name;
private TextView tvCast;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_balltraining_list);
// Showing and Enabling clicks on the Home/Up button
if(getSupportActionBar() != null) {
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
// setting up text views and stuff
setUpUIViews();
// recovering data from MainActivity, sent via intent
Bundle bundle = getIntent().getExtras();
if(bundle != null){
String json = bundle.getString("ballTrainingModel");
BallTrainingModel ballTrainingModel = new Gson().fromJson(json, BallTrainingModel.class);
StringBuffer stringBuffer = new StringBuffer();
for(BallTrainingModel.Cast cast : ballTrainingModel.getCastList()){
stringBuffer.append(cast.getName() + ", ");
}
tvCast.setText(stringBuffer);
//tvStory.setText(movieModel.getStory());
}
}
private void setUpUIViews() {
name = (TextView)findViewById(R.id.Name);
}
}
這裏是JSON文件：
{
"BasketballTraining": [
{
"thumb":"https://kycapitalliving.files.wordpress.com/2014/02/basketball-thumbnail.jpg",
"category": "Ball Handling",
"cast": [
{
"name": "Robert Downey Jr."
},
{
"name": "Chris Evans"
},
{
"name": "Mark Ruffalo"
}
]
},
{
"thumb":"https://kycapitalliving.files.wordpress.com/2014/02/basketball-thumbnail.jpg",
"category": "Shooting",
"cast": [
{
"name": "Matthew McConaughey"
},
{
"name": "Anne Hathaway"
},
{
"name": "Jessica Chastain"
},
{
"name": "Wes Bentley"
}
]
},
{
"thumb":"https://kycapitalliving.files.wordpress.com/2014/02/basketball-thumbnail.jpg",
"category": "Post Moves",
"cast": [
{
"name": "Miles Teller"
},
{
"name": "Kate Mara"
},
{
"name": "Michael B. Jordan"
}
]
},
{
"thumb":"https://kycapitalliving.files.wordpress.com/2014/02/basketball-thumbnail.jpg",
"category": "Defense",
"cast": [
{
"name": "Christian Bale"
},
{
"name": "Heath Ledger"
},
{
"name": "Aaron Eckhart"
}
]
},
{
"thumb":"https://kycapitalliving.files.wordpress.com/2014/02/basketball-thumbnail.jpg",
"category": "Scoring",
"cast": [
{
"name": "Viggo Mortensen"
},
{
"name": "Ian McKellen"
},
{
"name": "Elijah Wood"
}
]
},
{
"thumb":"https://kycapitalliving.files.wordpress.com/2014/02/basketball-thumbnail.jpg",
"category": "Others",
"cast": [
{
"name": "Roberto Benigni"
},
{
"name": "Nicoletta Braschi"
},
{
"name": "Giorgio Cantarini"
}
]
}
]
}
，這裏是我的模型：
public class BallTrainingModel {
private String thumbnail;
private String category;
@SerializedName("cast")
private List<Cast> castList;
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public List<Cast> getCastList() {
return castList;
}
public String getThumbnail() {
return thumbnail;
}
public void setThumbnail(String thumbnail) {
this.thumbnail = thumbnail;
}
public void setCastList(List<Cast> castList) {
this.castList = castList;
}
public static class Cast {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
}
任何實例或幫助將不勝感激。先謝謝你。