Android通過單擊recyclerview將jsonObject傳遞給另一個活動

Question

我正在Android中創建應用程序。

我正在使用翻新功能從URL（http://kerast.com/pokemon/pokemons.json）獲取包含小寵物名稱的JSON數據。名稱和類型顯示在回收站視圖中，並且在彼此點擊後，活動打開並顯示攻擊，防禦和移動。

到目前爲止，我已經能夠打開一個新的活動，但不知道如何傳遞該對象。我想沒有必要重新加載json，爲每個活動重寫兩次相同的代碼？

這裏是我的類：

public class Pokemon { 

    private String name; 
    private String type; 
    private Integer attack; 
    private Integer defense; 
    private Integer evolveLevel; 

    public void setName(String name) { 
     this.name = name; 
    } 

    public String getName() { 
     return name; 
    } 

    public void setType(String type) { 
     this.type = type; 
    } 

    public String getType() { 
     return type; 
    } 

    public Integer getattack() { return attack; } 

    public Integer getdefense() { return defense; } 

    public Integer getEvolveLevel() { return evolveLevel; } 
} 

我DataAdpater：

public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> implements Filterable { 

    private ArrayList<Pokemon> mArrayList; 
    private ArrayList<Pokemon> mFilteredList; 



    public DataAdapter(ArrayList<Pokemon> arrayList) { 
     mArrayList = arrayList; 
     mFilteredList = arrayList; 

    } 

    @Override 
    public DataAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) { 
     View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_row, viewGroup, false); 
     return new ViewHolder(view); 
    } 

    @Override 
    public void onBindViewHolder(DataAdapter.ViewHolder viewHolder, int i) { 

     viewHolder.tv_name.setText(mFilteredList.get(i).getName()); 
     viewHolder.tv_version.setText(mFilteredList.get(i).getName()); 
     viewHolder.tv_api_level.setText(mFilteredList.get(i).getType()); 
    } 

    @Override 
    public int getItemCount() { 

     return mFilteredList.size(); 
    } 

    @Override 
    public Filter getFilter() { 

     return new Filter() { 
      @Override 
      protected FilterResults performFiltering(CharSequence charSequence) { 

       String charString = charSequence.toString(); 

       if (charString.isEmpty()) { 

        mFilteredList = mArrayList; 
       } else { 

        ArrayList<Pokemon> filteredList = new ArrayList<>(); 

        for (Pokemon marraylist : mArrayList) { 

         if (marraylist.getName().toLowerCase().contains(charString) || marraylist.getType().toLowerCase().contains(charString)) { 

          filteredList.add(marraylist); 
         } 
        } 

        mFilteredList = filteredList; 
       } 

       FilterResults filterResults = new FilterResults(); 
       filterResults.values = mFilteredList; 
       return filterResults; 
      } 

      @Override 
      protected void publishResults(CharSequence charSequence, FilterResults filterResults) { 
       mFilteredList = (ArrayList<Pokemon>) filterResults.values; 
       notifyDataSetChanged(); 
      } 
     }; 
    } 

    public class ViewHolder extends RecyclerView.ViewHolder{ 
     private TextView tv_name,tv_version,tv_api_level; 
     public ViewHolder(View view) { 
      super(view); 

      tv_name = (TextView)view.findViewById(R.id.tv_name); 
      tv_version = (TextView)view.findViewById(R.id.tv_version); 
      tv_api_level = (TextView)view.findViewById(R.id.tv_api_level); 

      view.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View view) { 
        Intent intent = new Intent(view.getContext(), Main2Activity.class); 
        intent.putExtra("attack", Pokemon); 
        view.getContext().startActivity(intent); 
       } 
      }); 

     } 
    } 

} 

最後我MainActivity：

public class MainActivity extends AppCompatActivity { 

    public static final String BASE_URL = "http://kerast.com"; 
    private RecyclerView mRecyclerView; 
    private ArrayList<Pokemon> mArrayList; 
    private DataAdapter mAdapter; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

     initViews(); 
     loadJSON(); 
    } 

    private void initViews(){ 
     mRecyclerView = (RecyclerView)findViewById(R.id.card_recycler_view); 
     mRecyclerView.setHasFixedSize(true); 
     RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this); 
     mRecyclerView.setLayoutManager(layoutManager); 
    } 
    private void loadJSON(){ 
     Retrofit retrofit = new Retrofit.Builder() 
       .baseUrl(BASE_URL) 
       .addConverterFactory(GsonConverterFactory.create()) 
       .build(); 
     RequestInterface request = retrofit.create(RequestInterface.class); 
     Call<JSONResponse> call = request.getJSON(); 
     call.enqueue(new Callback<JSONResponse>() { 
      @Override 
      public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response) { 

       JSONResponse jsonResponse = response.body(); 
       mArrayList = new ArrayList<>(Arrays.asList(jsonResponse.getPokemons())); 
       mAdapter = new DataAdapter(mArrayList); 
       mRecyclerView.setAdapter(mAdapter); 
      } 

      @Override 
      public void onFailure(Call<JSONResponse> call, Throwable t) { 
       Log.d("Error",t.getMessage()); 
      } 
     }); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 

     getMenuInflater().inflate(R.menu.menu_main, menu); 

     MenuItem search = menu.findItem(R.id.search); 
     SearchView searchView = (SearchView) MenuItemCompat.getActionView(search); 
     search(searchView); 
     return true; 
    } 

    private void search(SearchView searchView) { 

     searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { 
      @Override 
      public boolean onQueryTextSubmit(String query) { 

       return false; 
      } 

      @Override 
      public boolean onQueryTextChange(String newText) { 

       mAdapter.getFilter().filter(newText); 
       return true; 
      } 
     }); 
    } 
} 

所以，我怎麼能得到的只有攻擊防禦和evolveLevel是顯示在第二個活動？

Answer 1

實現Serializable接口口袋妖怪實現Serializable 和 那麼你可以使用putExtra（）傳遞對象實例的意圖額外

//send : 
intent.putExtra("Pokemon", obj); 
//retrieve : 
getIntent().getSerializableExtra("MyClass"); 

Answer 2

那麼答案由阿克沙伊是正確的，但我認爲這會更好的方式來做到這一點。我們可以使用Parcelable類而不是可序列化的。

請參考以下鏈接difference b/w parcelable and serializale

和paracelable我使用online creator創建一個POJO類。

休息是相同

//Sending data 
intent.putExtra("String name", object); 

//Receving end 
Bundle bundle = getIntent().getExtras(); 
if (bundle != null) { 
    Pokemon pokemon = (Pokemon) bundle.getParcelable("String name") 
}