Java 如何使用adapter.notifyDataSetChanged（）；我必须使用这些行来纠正我的错误

ItemListBaseAdapter.java

public class ItemListBaseAdapter extends BaseAdapter {
private static ArrayList<Recipedetails> itemDetailsrrayList;

private Integer[] imgid = {
        R.drawable.vegeterian,
        R.drawable.nonveg,
        R.drawable.pickels,
        R.drawable.soup,
        R.drawable.sweets,
        R.drawable.cakes,
        R.drawable.icecreams,
        R.drawable.chinesevegdishes,
        R.drawable.chinesenonveg,
        R.drawable.chinesenoodles,
        R.drawable.chinesesoup,
        R.drawable.godhumaivegadai,
        R.drawable.soyamorekoozh,
        R.drawable.tomatokulambu,
        R.drawable.tomatoupma,
        R.drawable.vadanavratrispecial,
        R.drawable.eggkurma,
        R.drawable.milagu,
        R.drawable.rasam,
        R.drawable.vegetablekootu,
        R.drawable.avial,
        R.drawable.kothavarangaicurry,
        R.drawable.allepeyfishcurry,
        R.drawable.spicymadraschicken,
        R.drawable.prawns,
        R.drawable.keralachickenstew,
        R.drawable.nilgirichickenkorma,
        R.drawable.pepperchickencurry,
        R.drawable.chettiandchicken,
        R.drawable.prawnmasala,
        R.drawable.beeffry,
        R.drawable.crispyfish,
        R.drawable.amlapickle,
        R.drawable.avakaipickle,
        R.drawable.capsicumpickle,
        R.drawable.lemonpickle,
        R.drawable.onionpickle,
        R.drawable.mangopickle,
        R.drawable.tendermangopickle,
        R.drawable.tomatopickle,
        R.drawable.chillipickles,
        R.drawable.gingerpickle,
        R.drawable.garlicsoup,
        R.drawable.mixedvegsoup,
        R.drawable.chickenmanchowsoup,
        R.drawable.cleartomatosoup,
        R.drawable.sweetcornvegetablesoup,
        R.drawable.prawnandnoodlesoup,
        R.drawable.beetrootsoup,
        R.drawable.capsicumsoup,
        R.drawable.muttonsoup,
        R.drawable.spinachsoup,
        R.drawable.vegcurry,
        R.drawable.mushroommutter,
        R.drawable.alooparatha,
        R.drawable.daltadka,
        R.drawable.aloomethi,
        R.drawable.rajma,
        R.drawable.paneerbhujri,
        R.drawable.alooghobi,
        R.drawable.aloosabzi,
        R.drawable.kadhaipaneer,
        R.drawable.chickenwithbellpeppers,
        R.drawable.butterchicken,
        R.drawable.fishkorma,
        R.drawable.prawnfry,
        R.drawable.tandoorichicken,
        R.drawable.maccherjholfish,
        R.drawable.shamikabab,
        R.drawable.saagmeat,
        R.drawable.sindhichickenbiryani,
        R.drawable.punjabichickencurry,
        R.drawable.gulabjamun,
        R.drawable.basundi,
        R.drawable.peda,
        R.drawable.badhamhalwa,
        R.drawable.coconutburfi,
        R.drawable.kulfi,
        R.drawable.ladoo,
        R.drawable.mysorepak,
        R.drawable.ricekheer,
        R.drawable.badam,
        R.drawable.cauliflowersoup,
        R.drawable.cucumbersoup,
        R.drawable.tomatosoup,
        R.drawable.mulligatawnysoup,
        R.drawable.greenpeassoup,
        R.drawable.northindianmuttonsoup,
        R.drawable.chickennoodlesoup,
        R.drawable.spicybeansoup,
        R.drawable.eggdropsoup,
        R.drawable.springvegsoup,
        R.drawable.mushroomandseitan,
        R.drawable.tofuwith3spices,
        R.drawable.creamyvegpie,
        R.drawable.grilledvegmedley,
        R.drawable.bakedsquash,
        R.drawable.africanchickenstew,
        R.drawable.westafricanchicken,
        R.drawable.africanyamsoup,
        R.drawable.chickenchilliroast,
        R.drawable.chilliblackbeans,
        R.drawable.williecake,
        R.drawable.pumpkingingercupcakes,
        R.drawable.doublelayerpumpkincheesecake,
        R.drawable.carrotcake,
        R.drawable.sexcake,
        R.drawable.chocolatechipicecream,
        R.drawable.cookieicecream,
        R.drawable.cinnamonicecream,
        R.drawable.appleicecream,
        R.drawable.walnut,
        R.drawable.chineseaubergins,
        R.drawable.spicycucumber,
        R.drawable.chinesemushrooms,
        R.drawable.chinesegobi,
        R.drawable.spicytofu,
        R.drawable.chinesetilchicken,
        R.drawable.chickenmoongali,
        R.drawable.sweetsourchicken,
        R.drawable.cherrychicken,
        R.drawable.mymasalachicken,
        R.drawable.coldseasamenoodles,
        R.drawable.sobanoodles,
        R.drawable.noodleswithtofu,
        R.drawable.chinesevegandbeef,
        R.drawable.noodleswithpepper,
        R.drawable.jhingasoup,
        R.drawable.masalachickensoup,
        R.drawable.cabbagesoup,
        R.drawable.chinesepumpkinsoup,
        R.drawable.baconsoup,





        };



private LayoutInflater l_Inflater;

public ItemListBaseAdapter(Context context, ArrayList<Recipedetails> results) {
    itemDetailsrrayList = results;
    l_Inflater = LayoutInflater.from(context);
}

public int getCount() {
    return itemDetailsrrayList.size();
}

public Object getItem(int position) {
    return itemDetailsrrayList.get(position);
}

public long getItemId(int position) {
    return position;
}

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView == null) {
        convertView = l_Inflater.inflate(R.layout.item_details_view, null);
        holder = new ViewHolder();
        holder.txt_itemName = (TextView) convertView.findViewById(R.id.name);
        holder.txt_itemDescription = (TextView) convertView.findViewById(R.id.itemDescription);
        holder.itemImage = (ImageView) convertView.findViewById(R.id.photo);

        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.txt_itemName.setText(itemDetailsrrayList.get(position).getName());
    holder.txt_itemDescription.setText(itemDetailsrrayList.get(position).getItemDescription());
    holder.itemImage.setImageResource(imgid[itemDetailsrrayList.get(position).getImageNumber() - 1]);
    return convertView;
}
public synchronized   void refreshAdapter(ArrayList<Recipedetails> items) {
    itemDetailsrrayList.clear();
    itemDetailsrrayList.addAll(items);
    notifyDataSetChanged();
}

static class ViewHolder {
    TextView txt_itemName;
    TextView txt_itemDescription;
    ImageView itemImage;
}

}

Listview.java

public class SouthIndian  extends Activity {
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        final ArrayList<Recipedetails> image_details = GetSearchResults();

        final ListView lv1 = (ListView) findViewById(R.id.listV_main);
        lv1.setAdapter(new ItemListBaseAdapter(this, image_details));

        lv1.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> a, View v, int position, long id) { 
                Object o = lv1.getItemAtPosition(position);
                Recipedetails obj_itemDetails = (Recipedetails)o;
                Toast.makeText(SouthIndian.this, "You have chosen : " + " " + obj_itemDetails.getName(), Toast.LENGTH_LONG).show();

                 //final ArrayList<Recipedetails> act = GetSearchResults(); 
                //if (act != null)


                switch(obj_itemDetails.getImageNumber())
                {
                    case 1:
                         Intent newActivity = new Intent(SouthIndian.this, 
                                 AndroidTabLayoutActivity.class);     
                         startActivity(newActivity);
                        break;

                    case 2:
                        Intent new1Activity = new Intent(SouthIndian.this, 
                                AndroidTabLayoutActivity1.class);     
                        startActivity(new1Activity);
                        break;

                    case 3:
                        Intent new2Activity = new Intent(SouthIndian.this, 
                                AndroidTabLayoutActivity2.class);     
                        startActivity(new2Activity);
                        break; 

                    case 4:
                        Intent new3Activity = new Intent(SouthIndian.this, 
                                AndroidTabLayoutActivity3.class);     
                        startActivity(new3Activity);
                        break;      

                   default:
                       Toast.makeText(SouthIndian.this, "Wrong Input", Toast.LENGTH_LONG).show();
                }

            } 
        });
        runOnUiThread(new Runnable() {
                public void run() {


                    ItemListBaseAdapter.refreshAdapter(item);
                    //ItemListBaseAdapter.notifyDataSetChanged();
                }
            });

    }

    private ArrayList<Recipedetails> GetSearchResults(){
        ArrayList<Recipedetails> results = new ArrayList<Recipedetails>();

        Recipedetails item_details = new Recipedetails();
        item_details.setName("Vegterian");
        item_details.setItemDescription("Recipes made by raw materials");
        item_details.setImageNumber(1);
        results.add(item_details);

        item_details = new Recipedetails();
        item_details.setName("Non-Vegterian");
        item_details.setItemDescription("Flesh of sweet animals");
        item_details.setImageNumber(2);
        results.add(item_details);

        item_details = new Recipedetails();
        item_details.setName("Pickels");
        item_details.setItemDescription("Touchable dish  by Homemade");
        item_details.setImageNumber(3);
        results.add(item_details);

        item_details = new Recipedetails();
        item_details.setName("Soups");
        item_details.setItemDescription("Startup for our food");
        item_details.setImageNumber(4);
        results.add(item_details);




        return results;
    }
}

在我的代码中，如何以及在何处使用

adapter.notifyDataSetChanged（）

---

单击listview中的第二项，应用程序已停止并显示类似于我在logcat中提到的错误将此方法添加到适配器中

public synchronized void refresAdapter(ArrayList<Recipedetails> items) {
    itemDetailsrrayList.clear();
    itemDetailsrrayList.addAll(items);
    notifyDataSetChanged();
}

final Activity act = getActivity(); //only neccessary if you use fragments
if (act != null)
    act.runOnUiThread(new Runnable() {
        public void run() {
            yourAdapter.refreshAdapter(item);
        }
    });

---

这将解决您的问题

将此方法添加到适配器

public synchronized void refresAdapter(ArrayList<Recipedetails> items) {
    itemDetailsrrayList.clear();
    itemDetailsrrayList.addAll(items);
    notifyDataSetChanged();
}

final Activity act = getActivity(); //only neccessary if you use fragments
if (act != null)
    act.runOnUiThread(new Runnable() {
        public void run() {
            yourAdapter.refreshAdapter(item);
        }
    });

---

这应该可以解决您的问题

没有

项目详细信息列表

作为

静态

没有

项目详细信息列表

作为

静态

，我有很多列表视图，我必须在所有列表视图中添加。？你能看一下我在这个链接中的代码，告诉我我想在哪里添加你上面提到的第二个代码吗？抱歉，这里没有这个问题，在southindia.java中，只有当我单击列表视图中的第一个项目时，如果我返回并单击该列表视图中的另一个项目，它将再次工作，活动已停止。请参阅此代码，我必须使用前面提到的第二个代码，您必须为您的活动提供适配器的全局范围，然后在哪里更新适配器的数据请调用youradapter.refresh（使用新列表作为参数）；如上所示，我有很多列表视图，我必须添加所有列表视图。？你能看一下我在这个链接中的代码，告诉我我想在哪里添加你上面提到的第二个代码吗？抱歉，这里没有这个问题，在southindia.java中，只有当我单击列表视图中的第一个项目时，如果我返回并单击该列表视图中的另一个项目，它将再次工作，活动已停止。请参阅此代码，我必须使用前面提到的第二个代码，您必须为您的活动提供适配器的全局范围，然后在哪里更新适配器的数据请调用youradapter.refresh（使用新列表作为参数）；正如我在上面所展示的，我并没有完全从您那里得到它，您能告诉我，每次您创建一个新适配器时，您都在替换每个实例的内容，我想立即做些什么吗。删除static关键字以停止实例共享一个列表。这个java文件和listadapter显示了问题，如何做我不能完全从你那里得到它，你能告诉我，每次你创建一个新的适配器时，你都在替换每个实例的内容，我想要做什么。删除static关键字以停止实例共享一个列表。这个java文件和listadapter显示问题，怎么办