我有一个很长的列表视图,因此我尝试添加搜索栏,因此我不必滚动列表视图来查找我想要的内容。它似乎过滤掉了它想要的东西,任何关于我做错的线索?
这是列表:
public class ExList {
private List<Example> listExample = new ArrayList<Example>();
public void populateThingsList(){
listExample.add(new Example("asdf name", 1, "Example detail 1", "Example detail 2", R.drawable.1_icon, "Example detail 3"));
listExample.add(new Example("ghkj name", 2, "Example detail 1", "Example detail 2", R.drawable.2_icon, "Example detail 3"));
listExample.add(new Example("astg name", 3, "Example detail 1", "Example detail 2", R.drawable.3_icon, "Example detail 3"));
listExample.add(new Example("ghky name", 4, "Example detail 1", "Example detail 2", R.drawable.4_icon, "Example detail 3"));
listExample.add(new Example("ghee name", 5, "Example detail 1", "Example detail 2", R.drawable.5_icon, "Example detail 3"));
listExample.add(new Example("asre name", 6, "Example detail 1", "Example detail 2", R.drawable.6_icon, "Example detail 3"));
listExample.add(new Example("yuoi name6", 7, "Example detail 1", "Example detail 2", R.drawable.7_icon, "Example detail 3"));
listExample.add(new Example("oiuy name", 8, "Example detail 1", "Example detail 2", R.drawable.8_icon, "Example detail 3"));
listExample.add(new Example("fdsa name", 9, "Example detail 1", "Example detail 2", R.drawable.9_icon, "Example detail 3"));
listExample.add(new Example("lkjh name", 10, "Example detail 1", "Example detail 2", R.drawable.10_icon, "Example detail 3"));
}
和我写的搜索方法:
public void filter(String search) {
Example ex;
String s = search.trim().toLowerCase();
String t;
for (int i = 0; i < listExample.size(); i++) {
ex = listExample.get(i);
t = ex.getName().trim().toLowerCase();
if (!t.contains(s)){
listExample.remove(ex);
}
}
}
以及获取文本的时间代码
searchText = (EditText) findViewById(R.id.txt_search);
searchText.addTextChangedListener(new TextWatcher(){
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
if (!searchText.getText().toString().trim().isEmpty()){
listExample = exList.getListExample();
exList.filter(searchText.getText().toString());
populateListView();
}
if (searchText.getText().toString().trim().isEmpty()){
listExample = exList.getListExample();
populateListView();
//this resets the listview and actually works
}
}
@Override
public void afterTextChanged(Editable editable) {
}
});
我的arrayadapter类和populatelistview方法
private void populateListView() {
ArrayAdapter<Example> adapter = new MyListAdapter();
ListView list = (ListView) findViewById(R.id.exampleListView);
list.setAdapter(adapter);
}
private class MyListAdapter extends ArrayAdapter<Example> {
public MyListAdapter() {
super(MainActivity.this, R.layout.item_view, listExample);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View itemView = convertView;
if (itemView == null) {
itemView = getLayoutInflater().inflate(R.layout.item_view, parent, false);
}
Example currentExample = listExample.get(position);
ImageView imageView = (ImageView)itemView.findViewById(R.id.item_image);
imageView.setImageResource(currentExample.getIconId());
TextView detailThreeText = (TextView) itemView.findViewById(R.id.item_txtDThree);
detailThreeText.setText(currentExample.getDThree());
TextView detailTwoText = (TextView) itemView.findViewById(R.id.item_txtDTwo);
detailTwoText.setText(currentExample.getDTwo());
TextView detailOneText = (TextView) itemView.findViewById(R.id.item_txtDOne);
detailOneText.setText(currentExample.getDOne());
TextView nameText = (TextView) itemView.findViewById(R.id.item_txtName);
nameText.setText(currentExample.getName());
return itemView;
}
答案 0 :(得分:2)
我试着在这里写一些通用代码,修改它并让我知道。不要使用单独的函数进行比较,请在onTextChanged
searchText.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
String searchString = searchText.getText().toString();
int textLength = searchString.length();
ArrayList<String> searchList = new ArrayList<String>;
//searchList.clear();
for (int i = 0; i < listExample.size(); i++) {
Example model = listExample.get(i);
String Names = model.getName().toString();
if (textLength <= Names.length()) {
// compare the String in EditText with Names in the
// ArrayList
if (searchString.equalsIgnoreCase(Names.substring(
0, textLength)))
searchList.add(listExample.get(i));
}
}
ArrayAdapter<Example> ad = new YOUR_ADAPTER(
YOUR_CLASS.this, searchList);
YOUR_LISTVIEW.setAdapter(ad);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
答案 1 :(得分:1)
严肃地说,你做错了什么。找出问题的最快方法是调试应用程序,使用断点逐步执行它。在每个断点处,检查重要值的值。在某些时候,您会发现您的假设是不正确的。例如,您发现比较操作无法正常工作。
相信我,这是解决问题的最快方法。我们这里的其他人可以阅读你的代码几个小时,试图找到错误,但通过调试你可能会在几分钟内找到问题。