無法實現onClickListener自定義ListAdapter列表視圖

Question

我在執行onItemClick時遇到問題，因爲我的ListView。我需要在點擊我的ListView中的項目時打開一項新活動，並將標題/流派/評級/發佈年份數據傳遞給此新活動。我還想知道如何通過ListView中點擊的項目的縮略圖圖像並將其顯示在新的活動中。

CustomListAdapter.java

public class CustomListAdapter extends BaseAdapter { 
    private Activity activity; 
    private LayoutInflater inflater; 
    private List<Movie> movieItems; 
    ImageLoader imageLoader = AppController.getInstance().getImageLoader(); 

    public CustomListAdapter(Activity activity, List<Movie> movieItems) { 
     this.activity = activity; 
     this.movieItems = movieItems; 
    } 

    @Override 
    public int getCount() { 
     return movieItems.size(); 
    } 

    @Override 
    public Object getItem(int location) { 
     return movieItems.get(location); 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 

     if (inflater == null) 
      inflater = (LayoutInflater) activity 
        .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     if (convertView == null) 
      convertView = inflater.inflate(R.layout.list_row, null); 

     if (imageLoader == null) 
      imageLoader = AppController.getInstance().getImageLoader(); 
     NetworkImageView thumbNail = (NetworkImageView) convertView 
       .findViewById(R.id.thumbnail); 
     TextView title = (TextView) convertView.findViewById(R.id.title); 
     TextView rating = (TextView) convertView.findViewById(R.id.rating); 
     TextView genre = (TextView) convertView.findViewById(R.id.genre); 
     TextView year = (TextView) convertView.findViewById(R.id.releaseYear); 

     // getting movie data for the row 
     Movie m = movieItems.get(position); 

     // thumbnail image 
     thumbNail.setImageUrl(m.getThumbnailUrl(), imageLoader); 

     // title 
     title.setText(m.getTitle()); 

     // rating 
     rating.setText("Rating: " + String.valueOf(m.getRating())); 

     // genre 
     String genreStr = ""; 
     for (String str : m.getGenre()) { 
      genreStr += str + ", "; 
     } 
     genreStr = genreStr.length() > 0 ? genreStr.substring(0, 
       genreStr.length() - 2) : genreStr; 
     genre.setText(genreStr); 

     // release year 
     year.setText(String.valueOf(m.getYear())); 

     return convertView; 
    } 

} 

Main2Activity.java

public class Main2Activity extends AppCompatActivity { 
    // Log tag 
    private static final String TAG = Main2Activity.class.getSimpleName(); 

    // Movies json url 
    private static final String url = "http://api.androidhive.info/json/movies.json"; 
    private ProgressDialog pDialog; 
    private List<Movie> movieList = new ArrayList<Movie>(); 
    private ListView listView; 
    private CustomListAdapter adapter; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main2); 

     listView = (ListView) findViewById(service_list); 
     adapter = new CustomListAdapter(this, movieList); 
     listView.setAdapter(adapter); 


     pDialog = new ProgressDialog(this); 
     // Showing progress dialog before making http request 
     pDialog.setMessage("Loading..."); 
     pDialog.show(); 

     // changing action bar color 
     //getActionBar().setBackgroundDrawable(
       //new ColorDrawable(Color.parseColor("#1b1b1b"))); 

     // Creating volley request obj 
     JsonArrayRequest movieReq = new JsonArrayRequest(url, 
       new Response.Listener<JSONArray>() { 
        @Override 
        public void onResponse(JSONArray response) { 
         Log.d(TAG, response.toString()); 
         hidePDialog(); 

         // Parsing json 
         for (int i = 0; i < response.length(); i++) { 
          try { 

           JSONObject obj = response.getJSONObject(i); 
           Movie movie = new Movie(); 
           movie.setTitle(obj.getString("title")); 
           movie.setThumbnailUrl(obj.getString("image")); 
           movie.setRating(((Number) obj.get("rating")) 
             .doubleValue()); 
           movie.setYear(obj.getInt("releaseYear")); 

           // Genre is json array 
           JSONArray genreArry = obj.getJSONArray("genre"); 
           ArrayList<String> genre = new ArrayList<String>(); 
           for (int j = 0; j < genreArry.length(); j++) { 
            genre.add((String) genreArry.get(j)); 
           } 
           movie.setGenre(genre); 

           // adding movie to movies array 
           movieList.add(movie); 

          } catch (JSONException e) { 
           e.printStackTrace(); 
          } 

         } 

         // notifying list adapter about data changes 
         // so that it renders the list view with updated data 
         adapter.notifyDataSetChanged(); 
        } 
       }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 
       VolleyLog.d(TAG, "Error: " + error.getMessage()); 
       hidePDialog(); 

      } 
     }); 

     // Adding request to request queue 
     AppController.getInstance().addToRequestQueue(movieReq); 
    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     hidePDialog(); 
    } 

    private void hidePDialog() { 
     if (pDialog != null) { 
      pDialog.dismiss(); 
      pDialog = null; 
     } 
    } 
} 

Answer 1

您可以將整個對象movieItem和位置的項目，然後單擊在接下來的活動中，你可以這樣提取它們。

listview.setOnItemClickListener(new OnItemClickListener(){ 

      @Override 
      public void onItemClick(AdapterView<?> p1, View p2, int p3, long p4) 
      { 
       intent=new Intent(getBaseContext(),NextActivity.class); 
      intent.putParcelableArrayListExtra("key", movielist); 
intent.putExtra("IntKey",p3); 
      } 
     }); 

Answer 2

您可以添加個別項目的模式要求作爲羣衆演員的意圖，也可以使模型類實現Serializable界面，並將整個對象手動添加到意圖：

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 
      Movie movie = (Movie) adapterView.getItemAtPosition(i); 
      Intent intent = new Intent(view.getContext(), DetailActivity.class); 
      intent.putExtra("mName", movie.getTitle()); 
      intent.putExtra("mRating", movie.getRating()); 
      intent.putExtra("mGenre", movie.getGenre()); 
      intent.putExtra("mYear". movie.getYear()); 

      //Get the Bitmap object from the NetworkImageView 
      Bitmap bm = ((BitmapDrawable)((NetworkImageView)view.findViewById(R.id.image)).getDrawable()).getBitmap(); 
      //Can be added directly as an Extra, as Bitmap implements Parcelable 
      intent.putExtra("mImage", bm); 

      //OR make Moview implement Serializable and do this : 
      //intent.putExtra("clickedObject", movie); 

      startActivity(intent); 
     } 
    }); 

In接收活動，您可以使用getExtras（）來獲取值：

Bitmap bm = getIntent().getExtras().getParcelable("mImage"); 
imageView.setImageBitmap(bm); 

Answer 3

一切工作正常後，我改變了代碼與人誰回答了這個問題的幫助。

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 
      Movie movie = (Movie) adapterView.getItemAtPosition(i); 
      Intent intent = new Intent(view.getContext(), Main3Activity.class); 
      intent.putExtra("mName", movie.getTitle()); 
      intent.putExtra("mRating", movie.getRating()); 
      intent.putExtra("mGenre", movie.getGenre()); 
      intent.putExtra("mYear", movie.getYear()); 
      intent.putExtra("mServiceImage",movie.getThumbnailUrl()); 
      //OR make Moview implement Serializable and do this : 
      //intent.putExtra("clickedObject", movie); 
      startActivity(intent); 
     } 
    }); 

在最後的活動中，我使用Android-Universal-Image-Loader從我從第一個活動傳遞的url加載圖像。

String mName = getIntent().getExtras().getString("mServiceImage"); 
    imageLoader.displayImage(mName, imageView);