此错误显示在我的 logcat 中
03-19 12:48:54.527: E/AndroidRuntime(2066): java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131165193, class android.widget.ListView) with Adapter(class com.example.recipestutors.ItemListBaseAdapter)]
Itemlistadapter.java
ublic 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;
}
}
soutindian.java
public class SouthIndian extends Activity {
ItemListBaseAdapter _itemListAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayList<Recipedetails> image_details = new ArrayList<Recipedetails>();
_itemListAdapter = new ItemListBaseAdapter(this, image_details);
final ListView lv1 = (ListView) findViewById(R.id.listV_main);
lv1.setAdapter(_itemListAdapter);
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();
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();
}
}
});
refreshYourAdapter(GetSearchResults());
}
// THIS IS WHAT IT SHOULD LOOK LIKE MORE OR LESS. THIS IS AS MUCH AS I CAN HELP
private void refreshYourAdapter(final ArrayList<Recipedetails> newData) {
//this is what I meant. The error clearly states you are not updating the adapter on the UI thread
runOnUiThread(new Runnable() {
public void run() {
_itemListAdapter.refreshAdapter(newData);
}
});
}
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;
}
}
Northindian.java
public class NorthIndian extends Activity {
ItemListBaseAdapter _itemListAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ArrayList<Recipedetails> image_details = new ArrayList<Recipedetails>();
_itemListAdapter = new ItemListBaseAdapter(this, image_details);
final ListView lv1 = (ListView) findViewById(R.id.listV_main);
lv1.setAdapter(_itemListAdapter);
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(NorthIndian.this, "You have chosen : " + " " + obj_itemDetails.getName(), Toast.LENGTH_LONG).show();
switch(obj_itemDetails.getImageNumber())
{
case 1:
Intent newActivity = new Intent(NorthIndian.this,
AndroidTabLayoutActivity4.class);
startActivity(newActivity);
break;
case 2:
Intent new1Activity = new Intent(NorthIndian.this,
AndroidTabLayoutActivity5.class);
startActivity(new1Activity);
break;
case 5:
Intent new2Activity = new Intent(NorthIndian.this,
AndroidTabLayoutActivity6.class);
startActivity(new2Activity);
break;
case 4:
Intent new3Activity = new Intent(NorthIndian.this,
AndroidTabLayoutActivity7.class);
startActivity(new3Activity);
break;
default:
Toast.makeText(NorthIndian.this, "Wrong Input", Toast.LENGTH_LONG).show();
}
}
});
refreshYourAdapter(GetSearchResults());
}
private void refreshYourAdapter(final ArrayList<Recipedetails> newData) {
//this is what I meant. The error clearly states you are not updating the adapter on the UI thread
runOnUiThread(new Runnable() {
public void run() {
_itemListAdapter.refreshAdapter(newData);
}
});
}
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("Sweets");
item_details.setItemDescription("Tasty sweets made from indians");
item_details.setImageNumber(5);
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 ListView 中第一次单击后，它将转到该功能，如果我们再次返回单击 ListView 中的下一项，则显示我的应用程序已停止。 我的问题没有解决，我尝试了所有方法
最佳答案
需要两个代码 在我们的列表适配器中
public synchronized void refreshAdapter(ArrayList<Recipedetails> items) {
//itemDetailsrrayList.clear();
itemDetailsrrayList = items;
notifyDataSetChanged();
}
还有我们的 ListView Activity
private void refreshYourAdapter(final ArrayList<Recipedetails> items) {
//this is what I meant. The error clearly states you are not updating the adapter on the UI thread
runOnUiThread(new Runnable() {
public void run() {
_itemListAdapter.refreshAdapter(items);
}
});
}
ListView 中还有另外一个代码
@Override
protected void onResume() {
super.onResume();
results = new ArrayList<Recipedetails>();
_itemListAdapter = new ItemListBaseAdapter(this, image_details);
refreshYourAdapter(GetSearchResults());
lv1.setAdapter(_itemListAdapter);
}
关于java - 适配器的内容已更改，但 ListView 未收到通知。内容适配器未从后台线程修改，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15500314/