フラグメント内のOnBackボタン

Question

どのように私はonbackが押されたボタンを追加することができます。このアクティビティでは、onBack押されたボタンの画像が表示されますが、機能しません。私はいくつかの方法を試みたが、私は私の問題を解決することはできません。あなたが私を助けてくれることを願います。私はあなたがButtonを持っていて、アクティビティまたは何を閉じるには、それをクリックしたときにしたい...あなたを理解することはできません

public class MyAdsActivity extends Fragment{ 


    public static MyAdsActivity newInstance(String param1, String param2) { 
     MyAdsActivity fragment = new MyAdsActivity(); 
     return fragment; 
    } 

    public MyAdsActivity() { 

    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
    } 

    private OnFragmentInteractionListener mListener; 

    Toolbar toolbar; 
    ListView lsv; 
    List<CatAdd> catAddList; 
    CateAdDisplayAdapter adapter; 
    Typeface typeface; 
    String advertId; 
    public static boolean refreshFlag = false; 
    private SharedPreferences pref; 

    private AdView mAdView; 
    FloatingActionButton fabAddAds; 

    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 

     View view = inflater.inflate(R.layout.activity_myads, container, false); 
     typeface = Typeface.createFromAsset(getActivity().getAssets(), "fonts/GandhiSerif-Bold.otf"); 

     fabAddAds = (FloatingActionButton) view.findViewById(R.id.fabAddAds); 

     mAdView = (AdView)view.findViewById(R.id.adView); 
     mAdView.loadAd(new AdRequest.Builder().build()); 

     pref = this.getActivity().getSharedPreferences("loginpreference", getActivity().MODE_PRIVATE); 
     advertId = pref.getString("advertId",""); 

     lsv = (ListView)view.findViewById(R.id.listView1); 
     catAddList = new ArrayList<CatAdd>(); 
     fabAddAds.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       startActivity(new Intent(getActivity() ,AddPostActivity.class)); 
      } 
     }); 

     new MyAdTask().execute(); 

     lsv.setOnItemClickListener(new OnItemClickListener() 
     { 
      @Override 
      public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, 
        long arg3) { 
       Intent intent = new Intent(getActivity(), BrowseMyDetailActivity.class); 
       intent.putExtra("adId", String.valueOf(catAddList.get(arg2).getAddid())); 
       startActivity(intent); 
      } 
     }); 

     return view; 
    } 

    // TODO: Rename method, update argument and hook method into UI event 
    public void onButtonPressed(Uri uri) { 
     if (mListener != null) { 
      mListener.onFragmentInteraction(uri); 
     } 
    } 
    @Override 
    public void onAttach(Activity activity) { 
     super.onAttach(activity); 

    } 

    @Override 
    public void onDetach() { 
     super.onDetach(); 
     mListener = null; 
    } 


    public interface OnFragmentInteractionListener { 
     // TODO: Update argument type and name 
     public void onFragmentInteraction(Uri uri); 
    } 

    @Override 
    public void onResume() { 
     // TODO Auto-generated method stub 
     super.onResume(); 
     if (refreshFlag) { 
      refreshFlag = false; 
      new MyAdTask().execute(); 
     } 
    } 

    class MyAdTask extends AsyncTask<Void, Void, Void> 
    { 
     String jsonStr = null; 
     CustomProgressDialog cd = new CustomProgressDialog(); 
     @Override 
     protected void onPreExecute() { 
      super.onPreExecute(); 
      cd.showdialog(getActivity(), "Loading....."); 
     } 
     @Override 
     protected Void doInBackground(Void... arg0) { 
      ServiceHandler sh = new ServiceHandler(); 
      jsonStr = sh.makeServiceCall(String.format(Constants.MYADS_URL, advertId), ServiceHandler.GET); 
      Log.d("Response: ", "> " + jsonStr); 

      if (jsonStr != null) { 
       try { 
        JSONObject jsonObj = new JSONObject(jsonStr); 
        JSONArray contacts = jsonObj.getJSONArray(Constants.TAG); 
        catAddList.clear(); 
        for (int i = 0; i < contacts.length(); i++) { 
         JSONObject c = contacts.getJSONObject(i); 
         String adId = c.getString(Constants.CAT_ADID); 
         String adTitle = c.getString(Constants.CAT_ADTITLE); 
         String adDes = c.getString(Constants.CAT_ADDES); 
         String adcity= c.getString(Constants.CAT_CITY); 
         String adPrise= c.getString(Constants.CAT_PRICE); 

         JSONArray arrImages=c.getJSONArray("images"); 
         ArrayList<String> imgArray=new ArrayList<String>(); 
         for(int j=0;j<arrImages.length();j++) 
         { 
          JSONObject imgObj=arrImages.getJSONObject(j); 
          if(imgObj.has("imageName")) 
          { 
           imgArray.add(imgObj.getString("imageName")); 
          } 

         } 
         CatAdd v=new CatAdd(); 
         v.setAddid(Integer.parseInt(adId)); 
         v.setAdTitle(adTitle); 
         v.setAdDesc(adDes); 
         v.setAdPrice(adPrise); 
         v.setImglist(imgArray); 
         v.setAdCity(adcity); 
         catAddList.add(v); 
        } 
       } catch (JSONException e) { 
        e.printStackTrace(); 
       } 
      } else { 
       Log.e("ServiceHandler", "Couldn't get any data from the url"); 
      } 
      return null; 
     } 
     @Override 
     protected void onPostExecute(Void result) { 
      super.onPostExecute(result); 
      adapter = new CateAdDisplayAdapter(getActivity(), catAddList); 
      adapter.notifyDataSetChanged(); 
      lsv.setAdapter(adapter); 
      cd.dismissdialog(); 
     } 
    } 

} 

Answer 1

：ここ

がコードであるあなたに感謝しますか？その場合は、次のコードを書いてください：

Button yourButton = (Button) view.findViewById(R.id.your_button_id); 
yourButton.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       getActivity().onBackPressed(); 
      } 
     });