0
我的搜索過濾器出現問題。當我開始輸入時，所有對象都消失了，並且沒有執行搜索。只有刷新後，他們回來。當我嘗試通過Toast進行校對時，調用適配器中的if (wp.getAnimal().toLowerCase(Locale.getDefault()) .contains(text))，沒有吐司視圖。搜索清除ListView中的所有對象
你有什麼想法，問題可能出在哪裏？提前致謝！
我的MainActivity類別與聽者的EditText
public class MainActivity extends ActionBarActivity{
private ListView mListView;
private AnimalAdapter mAdapter;
ProgressBar mProgressBar;
EditText mEditText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Add your initialization code here
Parse.initialize(this, "code", "code");
ParseObject.registerSubclass(Animal.class);
ParseAnalytics.trackAppOpened(getIntent());
View header = getLayoutInflater().inflate(R.layout.header, null);
header.setPadding(2, 8, 4, 2);
mListView = (ListView) findViewById(R.id.animal_list);
mListView.setVisibility(View.INVISIBLE);
mListView.addHeaderView(header);
mProgressBar = (ProgressBar) findViewById (R.id.loading_animals);
mProgressBar.setVisibility(View.VISIBLE);
RemoteDataTask task = new RemoteDataTask();
task.execute();
}
public void updateData(){
ParseQuery<Animal> query = ParseQuery.getQuery(Animal.class);
query.setCachePolicy(CachePolicy.CACHE_THEN_NETWORK);
query.orderByAscending("animal");
query.findInBackground(new FindCallback<Animal>() {
@Override
public void done(List<Animal> animals, ParseException error) {
if(animals != null){
mAdapter.clear();
mProgressBar.setVisibility(View.INVISIBLE);
for (int i = 0; i < animals.size(); i++) {
mAdapter.add(animals.get(i));
}
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_refresh:
Intent refreshIntent = new Intent(MainActivity.this, MainActivity.class);
refreshIntent.setFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
refreshIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(refreshIntent);
overridePendingTransition(0,0);
return true;
}
return super.onOptionsItemSelected(item);
}
private class RemoteDataTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
}
@Override
protected Void doInBackground(Void... params) {
updateData();
return null;
}
@Override
protected void onPostExecute(Void result) {
mListView = (ListView) findViewById(R.id.animal_list);
// Pass the results into ListViewAdapter.java
mAdapter = new AnimalAdapter(MainActivity.this, new ArrayList<Animal>());
mListView.setAdapter(mAdapter);
mListView.setVisibility(View.VISIBLE);
mListView.setTextFilterEnabled(true);
mEditText = (EditText) findViewById(R.id.search_animal);
mEditText.addTextChangedListener(new TextWatcher(){
@Override
public void afterTextChanged(Editable s) {
mListView.setVisibility(View.VISIBLE);
}
@Override
public void beforeTextChanged(CharSequence s,
int start, int count, int after) {
mListView.setVisibility(View.VISIBLE);
}
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
mListView.setVisibility(View.VISIBLE);
String text = mEditText.getText().toString()
.toLowerCase(Locale.getDefault());
mAdapter.filter(text);
}
});
}
}
}
我的適配器類濾波方法
public class AnimalAdapter extends ArrayAdapter<Animal> implements Filterable{
private Context mContext;
private List<Animal> mAnimals;
ImageLoader imageLoader;
ArrayList<Animal> array;
DisplayImageOptions options;
Activity activity;
private Filter animalFilter;
private List<Animal> animaly;
@SuppressWarnings("deprecation")
public AnimalAdapter(Context context, List<Animal> objects) {
super(context, R.layout.animal_row_item, objects);
ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context).build();
imageLoader = ImageLoader.getInstance();
imageLoader.init(config);
options = new DisplayImageOptions.Builder()
.cacheInMemory()
.cacheOnDisc()
.build();
this.mContext = context;
this.mAnimals = objects;
this.animaly = objects;
}
public View getView(int position, View convertView, ViewGroup parent){
if(convertView == null){
LayoutInflater mLayoutInflater = LayoutInflater.from(mContext);
convertView = mLayoutInflater.inflate(R.layout.animal_row_item, null);
}
final Animal animal = mAnimals.get(position);
TextView animalView = (TextView) convertView.findViewById(R.id.animal_text);
TextView areaView = (TextView) convertView.findViewById(R.id.area_text);
final ImageView animalPic = (ImageView)convertView.findViewById(R.id.animal_pic);
final ProgressBar indicator = (ProgressBar)convertView.findViewById(R.id.progress);
indicator.setVisibility(View.VISIBLE);
animalPic.setVisibility(View.INVISIBLE);
//Setup a listener we can use to switch from the loading indicator to the Image once it's ready
ImageLoadingListener listener = new ImageLoadingListener(){
@Override
public void onLoadingStarted(String arg0, View arg1) {
// TODO Auto-generated method stub
}
@Override
public void onLoadingCancelled(String arg0, View arg1) {
// TODO Auto-generated method stub
}
@Override
public void onLoadingComplete(String arg0, View arg1, Bitmap arg2) {
indicator.setVisibility(View.INVISIBLE);
animalPic.setVisibility(View.VISIBLE);
}
@Override
public void onLoadingFailed(String arg0, View view, FailReason arg2) {
}
};
imageLoader.displayImage(getItem(position).getImgUrl(), animalPic,options, listener);
animalView.setText(animal.getAnimal());
areaView.setText(animal.getArea());
convertView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(getContext(), MoreActivity.class);
intent.putExtra("about", animal.getAbout());
intent.putExtra("animal", animal.getAnimal());
intent.putExtra("imgUrl", animal.getImgUrl());
getContext().startActivity(intent);
}
});
return convertView;
}
public int getCount() {}
return mAnimals.size();
public void filter(String text) {
if (text.length() == 0) {
mAnimals.addAll(animaly);
Toast.makeText(getContext(), "text 0", Toast.LENGTH_SHORT).show();
} else {
mAnimals.clear();
for (Animal wp : animaly) {
if (wp.getAnimal().toLowerCase(Locale.getDefault())
.contains(text)) {
Toast.makeText(getContext(), "contains", Toast.LENGTH_SHORT).show();
mAnimals.add(wp);
}
}}
notifyDataSetChanged();
}
}
您是否檢查過動畫的大小？ – FWeigl
你是什麼意思？像getSize一樣？ – marson
檢查animaly是否包含任何內容，並帶有animaly.size（）。只是一個想法，也許它是空的。對不起，現在無法查看所有代碼以獲得全部圖片。 – FWeigl