ONItemClickListener 调用方法后

Posted 2023-04-19

【中文标题】ONItemClickListener 调用方法后

【英文标题】：After ItemClickListener call methot

【发布时间】：2020-09-16 11:24:46

【问题描述】：

我需要在gridView.setOnItemClickListener末尾调用createRandomList()方法， 但是当我制作这个gridView 时，imageList 不会更新。

如果我在textTT.setOnClickListener 中调用它，它会起作用。但我需要它在gridView.setOnItemClickListener 之后工作。

我的意思是在gridView.setOnItemClickListener之后，方法createRandomList()应该会自动被再次调用。

public class FragmentTrainingTest extends Fragment 

    Context context;
    TextView textTT;
    ArrayList<kayitSinifi> kelimeList = new ArrayList<>();
    int rand,position;
    Random r = new Random();
    MediaPlayer noVoice,yesVoice;
    ArrayList<kayitSinifi> randomList = new ArrayList<>();
    ArrayList<Integer> imageList = new ArrayList<>();
    gridAdapter adapter;
    boolean ilkKez = true;

    @SuppressLint("ClickableViewAccessibility")
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) 
        View inflate = inflater.inflate(R.layout.fragment_training_test, container, false);
        noVoice = MediaPlayer.create(context,R.raw.glitchinthematrix);
        yesVoice= MediaPlayer.create(context,R.raw.fillingyourinbox);
        final GridView gridView = inflate.findViewById(R.id.gridView);
        textTT= inflate.findViewById(R.id.txtTrainingTest);
        createRandomList();ilkKez = false;
        adapter = new gridAdapter(context,randomList,imageList);
        gridView.setAdapter(adapter);
        textTT.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View v) 
                createRandomList(); gridView.setAdapter(adapter);
            
        );


        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() 
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
                Log.i("tester","Item clicked");
                 if(position == rand)
                     yesVoice.start();
                     imageList.set(rand,R.drawable.ic_check_black_24dp);
                  else 
                     noVoice.start();
                     imageList.set(position,R.drawable.ic_close_black_24dp);
                     imageList.set(rand,R.drawable.ic_check_black_24dp);
                 
                gridView.setAdapter(adapter);
                //  createRandomList(); // please focus here
          
        );

       return inflate;
     //end of onCreateView

    private void createRandomList() 

        ArrayList<Integer> randomNumber = new ArrayList<>();
          // if (ilkKez)  else try Thread.sleep(1000); catch (InterruptedException e) e.printStackTrace();
        for (int i=0; randomList.size()>0;i++) randomList.remove(0);
        for (int i=0; imageList.size()>0;i++) imageList.remove(0);
        for (int i = 0; i< 6; i++) 
            do 
                rand = r.nextInt(kelimeList.size());
            
            while(randomNumber.contains(rand));
            randomNumber.add(rand);
            randomList.add(kelimeList.get(rand));
            imageList.add(R.drawable.ic_fingerprint_black_24dp);
        
        rand = r.nextInt(5); // 6 sayi belirlendi bu ise esas oglan
        textTT.setText(randomList.get(rand).anaDil);
        textTT.setBackgroundColor(Color.parseColor("#4CAF50"));
    

    @Override
    public void onAttach(Activity activity) 
        // TODO Auto-generated method stub
        super.onAttach(activity);
        context=activity;
        dbaseHelper db = new dbaseHelper(context);
        kelimeList=db.dbList2();
    

【问题讨论】：

我试图让您的问题更具可读性。您应该尝试提出一个展示您的问题的最小代码示例。很少有人愿意通读这样的一大堆代码。

【参考方案1】：

将createRandomList()放在gridView.setAdapter(adapter);前面

gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() 
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
            Log.i("tester","Item clicked");
             if(position == rand)
                 yesVoice.start();
                 imageList.set(rand,R.drawable.ic_check_black_24dp);
              else 
                 noVoice.start();
                 imageList.set(position,R.drawable.ic_close_black_24dp);
                 imageList.set(rand,R.drawable.ic_check_black_24dp);
             
            createRandomList();
            gridView.setAdapter(adapter);
      
    );

【讨论】：

是的，这可行，但问题是，gridview 有 2 个列表，第一个 randdomList 已更新，但第二个 imageList 未更新（这是我的问题）

其实我需要这个 gridView.setAdapter(adapter);创建随机列表（）； gridView.setAdapter(适配器);第一次不更新