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我设计了一个列表视图，它有一个图像视图、文本视图和按钮。最初，imageview 和 textview 将在单击 imageview 时可见，删除按钮将对所选视图可见，但我的问题是在选择下一个列表选项时，我需要隐藏按钮，一次只需要显示一个按钮。谁能帮帮我？

public class HistoryMenu extends MainActivity {

public final static String ITEM_TITLE = "title";  
public final static String ITEM_CAPTION = "caption";

public static Boolean deletedispflag=false;
public static View selectdelete=null;
String optionSelectedValue;
ArrayList<String> listString;
ArrayAdapter<String> aa;
ListView settingsSubList;
LayoutInflater linf;
//  public String[] stringList={"N @ 17.3 MPH (16-18)","10:25, 20 June 2013","N @ 17.3 MPH (16-18)","10:25, 20 June 2013","N @ 17.3 MPH (16-18)","10:25, 20 June 2013","N @ 17.3 MPH (16-18)","10:25, 20 June 2013"};
//  HistoryListAdapters historyListAdapter;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);     
    setContentView(R.layout.activity_history_menu);
    settingsSubList = (ListView) findViewById(R.id.settings_sub_list);

    LayoutParams layout = new LayoutParams(Gravity.CENTER);
    LayoutInflater inflator = (LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    View v = inflator.inflate(R.layout.centered_menu_title, null);

    ((TextView)v.findViewById(R.id.title)).setTextColor(getResources().getColor(R.color.white));
    this.getSupportActionBar().setCustomView(v,layout);

    listString=new ArrayList<String>();
    listString.add("history object 1");
    listString.add("history object 2");
    listString.add("history object 3");
    listString.add("history object 4");
    listString.add("history object 5");


    MyArrayAdapter adapter = new MyArrayAdapter(this, R.layout.history_option_selector, listString);

    settingsSubList.setAdapter(adapter);
    settingsSubList.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View arg1, int position,
                long arg3) {

        }
    });

}



   public class MyArrayAdapter extends ArrayAdapter<String> {       

       int previousDegrees = 0;
       int degrees = 90;
       RotateAnimation animation = new RotateAnimation(0f, 90f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); //, 200, 200); // canvas.getWidth() / 2, canvas.getHeight() / 2);    

       Context context;
       int layoutResourceId;
       ArrayList<String> historyitems = new ArrayList<String>();


       public MyArrayAdapter(Context context, int layoutResourceId,ArrayList<String> historyitems) 
       {
            super(context, layoutResourceId, historyitems);
            this.layoutResourceId = layoutResourceId;
            this.context = context;
            this.historyitems = historyitems;
       }
       @Override
       public View getView(int position, View convertView, ViewGroup parent) 
       {
           animation.setDuration(1000L);


            View item = convertView;            
            if (item == null) {
                    LayoutInflater inflater = ((Activity) context).getLayoutInflater();
                    item = inflater.inflate(layoutResourceId, parent, false);
            } 



            TextView items = (TextView) item.findViewById(R.id.history_list_option_text);
            final ImageView select_option = (ImageView) item.findViewById(R.id.history_list_option_select_image);
            final Button delete = (Button) item.findViewById(R.id.history_list_option_delete_button);
            delete.setVisibility(View.INVISIBLE);               
            String itemtext = historyitems.get(position);               
            items.setText(itemtext);

            select_option.setOnClickListener(new OnClickListener() {
                   @Override
                   public void onClick(View v) {
                      select_option.startAnimation(animation);
                      if(deletedispflag == false)
                      {
                          delete.setVisibility(v.VISIBLE);                        
                          selectdelete = v;
                          deletedispflag=true;
                      }
                      else if(deletedispflag==true)
                      {                   

                          delete.setVisibility(selectdelete.INVISIBLE);

                          deletedispflag=false;
                      }

                      Toast.makeText(context, "Edit", Toast.LENGTH_LONG).show();
                   }
            });


            delete.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                     Toast.makeText(context, "Delete", Toast.LENGTH_LONG).show();
                }
            });


       return item;
     }



   }

@Override
    public void onBackPressed() {
        // TODO Auto-generated method stub
        Intent intent = new Intent(this, MainActivity.class);           
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);            
        startActivity(intent);
        overridePendingTransition(R.drawable.activity_in_left_to_right_animation,R.drawable.activity_out_right_to_left_animation);
      }
  }
4

1 回答 1

0

您可以通过存储先前单击的按钮的引用来实现此目的

private Button prevDelete;

并将点击侦听器更改为如下所示：

select_option.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
     if(prevDelete!=null){
        prevDelete.setVisibility(View.INVISIBLE);
     }

     delete.setVisibility(View.VISIBLE);
     prevDelete = delete;
     select_option.startAnimation(animation);
     selectdelete = v;

     Toast.makeText(context, "Edit", Toast.LENGTH_LONG).show();
     }
});
于 2013-07-19T10:45:26.887 回答