Android 试图通过另一个活动过滤listview中的项目，如何更新listview？

我在google/stack上查看了一些示例，但没有找到解决问题的好方法

在显示listview的活动中，我得到了一个过滤器（winesCopy是wines列表的副本）：

我想我应该在这里使用notifyDatasetChange（）

但listview并不令人耳目一新

编辑我现在更改了一点代码，并使其正常工作

---

解决方案作为答案发布。

尝试startActivityForResult（）而不是startActivity（），如果控件从对话框活动返回，请在onActivityResult（）中调用adapter.notifyDataSetChanged（）

放置筛选器方法的活动

 public static List<Wine> filterByCountry(String country) {
            if (country.equals("")) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (!wine.getCountry().contains(country)) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }
        public static List<Wine> filterByTaste(String taste) {
            if (taste.equals("")) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (!wine.getTaste().contains(taste)) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }
        public static List<Wine> filterByYear(int year ) {
            if (Integer.valueOf(year)==null) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (wine.getYear()!=year) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }

        public static List<Wine> filterByBiologic(boolean biologic) {
            if (!biologic) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (wine.getBiologic()!=biologic) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }

        public static List<Wine> filterBySparkling(boolean sparkling) {
            if (!sparkling) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (wine.getSparkling()!=sparkling) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }

        public static List<Wine> filterByColor(String color) {
            if (color.equals("all")) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (!wine.getCountry().contains(color)) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }

        public static void clearFilter()
        {
            adapter.clear();
            for(Wine wine : winesCopy)
            {
            adapter.add(wine);
            }
            adapter.notifyDataSetChanged();
            lv.setAdapter(adapter);
            filteredList = new ArrayList<Wine>(wines);
        }

        public static void setFilter()
        {
            adapter.clear();
            for(Wine wine : filteredList)
            {
            adapter.add(wine);
            }
            adapter.notifyDataSetChanged();
            lv.setAdapter(adapter);
        }

---

尝试写入适配器。notifyDataSetChanged（）；在startActivity（）之前；我尝试了silvia，但也没有成功。然后再次尝试将适配器设置为listview。如下所示：listview.setAdapter（适配器）；adapter.notifyDataSetChanged（）；低压设置适配器（适配器）；星触觉（i）//adapter.notifyDataSetChanged（）//低压设置适配器（适配器）；尝试过这个，或者在startactivity之后，它不起作用。

Button btnSubmit = (Button) findViewById(R.id.activity_btn_add_filter);

        btnSubmit.setOnClickListener(new OnClickListener() {

              @Override
              public void onClick(View v) {
                  if(!etLand.equals(null))
                  {
                  ListWineView.filterWinesString(ListWineView.winesCopy,etLand.getText().toString());
                  }
                  if(!etTaste.equals(null)){
                      ListWineView.filterWinesString(ListWineView.winesCopy,etTaste.getText().toString());
                  }
                  if(!etYear.equals(null)){
                      ListWineView.filterWinesString(ListWineView.winesCopy,etYear.getText().toString());
                  }
                  if(cbBiologic.isChecked()){
                      ListWineView.filterWinesString(ListWineView.winesCopy, "true");
                  }else{
                      ListWineView.filterWinesString(ListWineView.winesCopy, "false");
                  }
                  if(cbMouserend.isChecked()){
                      ListWineView.filterWinesString(ListWineView.winesCopy, "true");
                  }else{
                      ListWineView.filterWinesString(ListWineView.winesCopy, "false");
                  }
                  if(spinner1.getSelectedItemId()!=0){
                      ListWineView.filterWinesString(ListWineView.winesCopy,spinner1.getSelectedItem().toString());
                  }


                  ListWinesViewFilterActivity.this.finish();
              }
        });

      }

btnFilter.setText("Filter");
    btnFilter.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent i = new Intent(ListWineView.this, ListWinesViewFilterActivity.class);
            startActivity(i);
            adapter.notifyDataSetChanged();
        }
    });

 public static List<Wine> filterByCountry(String country) {
            if (country.equals("")) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (!wine.getCountry().contains(country)) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }
        public static List<Wine> filterByTaste(String taste) {
            if (taste.equals("")) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (!wine.getTaste().contains(taste)) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }
        public static List<Wine> filterByYear(int year ) {
            if (Integer.valueOf(year)==null) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (wine.getYear()!=year) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }

        public static List<Wine> filterByBiologic(boolean biologic) {
            if (!biologic) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (wine.getBiologic()!=biologic) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }

        public static List<Wine> filterBySparkling(boolean sparkling) {
            if (!sparkling) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (wine.getSparkling()!=sparkling) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }

        public static List<Wine> filterByColor(String color) {
            if (color.equals("all")) {
                return wines;
            }
            ArrayList<Wine> winesFil = new ArrayList<Wine>(wines);
            for(Wine wine : winesFil) {
                if (!wine.getCountry().contains(color)) {
                    filteredList.remove(wine);
                }
            }
            return filteredList;
        }

        public static void clearFilter()
        {
            adapter.clear();
            for(Wine wine : winesCopy)
            {
            adapter.add(wine);
            }
            adapter.notifyDataSetChanged();
            lv.setAdapter(adapter);
            filteredList = new ArrayList<Wine>(wines);
        }

        public static void setFilter()
        {
            adapter.clear();
            for(Wine wine : filteredList)
            {
            adapter.add(wine);
            }
            adapter.notifyDataSetChanged();
            lv.setAdapter(adapter);
        }

 @Override
              public void onClick(View v) {
                    ListWineView.clearFilter();
                    ListWineView.filterByCountry(etLand.getText().toString());
                    if(!etYear.getText().toString().equals("")){
                    ListWineView.filterByYear(Integer.valueOf(etYear.getText().toString()));
                    }
                    ListWineView.filterByTaste(etTaste.getText().toString());
                    ListWineView.filterByBiologic(cbBiologic.isSelected());
                    ListWineView.filterBySparkling(cbMouserend.isSelected());
                    ListWineView.filterByColor(spinner1.getSelectedItem().toString());
                    ListWineView.setFilter();
                    ListWinesViewFilterActivity.this.finish();
              }
        });