我创建了一个列表视图。list 的每一行都有两个字段。一个是图像，另一个是书名。我如何在 android 中的一个列表字段上应用搜索功能。我添加了一个编辑文本文本。
setContentView(R.layout.activity_my_purchase);
TextView headerText = (TextView) findViewById(R.id.heading);
headerText.setText(R.string.my_purchase);
ImageView refreshImg = (ImageView) findViewById(R.id.img_right);
refreshImg.setImageResource(R.drawable.refresh);
ImageView searchImg = (ImageView) findViewById(R.id.img_middle);
searchImg.setImageResource(R.drawable.top_icn_search);
searchImg.setOnClickListener(searchImageClickListener);
searchBox = (EditText) findViewById(R.id.searchBox);
ImageView imgGidIcon = (ImageView) findViewById(R.id.img_left);
imgGidIcon.setImageResource(R.drawable.top_icn_grid);
imgGidIcon.setOnClickListener(imgGidIconClickListener);
// Restore preferences
SharedPreferences settings = EBookReaderApplication.getApplicationInstance().getAppPreferences();
String userName = settings.getString(Constants.TAG_USERNAME, null);
new PurchasedBooksListTask(MyPurchasesActivity.this).execute(
Constants.API_URL, userName);
// Set list view to the screen
bookListView = (ListView) findViewById(R.id.list_books);
bookListView.setOnItemClickListener(bookListItemClickListener);
searchResults = new ArrayList<HashMap<String, Object>>(originalValues);
searchBox.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2,
int arg3) {
String searchString = searchBox.getText().toString().trim();
int textLength = searchString.length();
listAdapter.clear();
// When user changed the Text
/// MyPurchasesActivity.this.listAdapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
}
/**
*
*/
private OnClickListener imgGidIconClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent().setClass(MyPurchasesActivity.this,
LibraryActivity.class);
startActivity(intent);
}
};
/**
*
*/
private OnClickListener searchImageClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
searchBox.setVisibility(View.VISIBLE);
}
};
private OnItemClickListener bookListItemClickListener = new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arview, View parent,
int position, long id) {
}
};
/**
*
* @author Manoj
*
*/
private class PurchasedBooksListTask extends
AsyncTask<String, Void, Boolean> {
/** progress dialog to show user that the backup is processing. */
private ProgressDialog dialog;
/* Constructor for the Asynchronous task */
public PurchasedBooksListTask(MyPurchasesActivity activity) {
dialog = new ProgressDialog(activity);
}
@Override
protected void onPreExecute() {
dialog.setMessage(getResources().getString(R.string.loading));
dialog.show();
}
@Override
protected Boolean doInBackground(String... params) {
try {
listPurchasedBooks = new JSONReader()
.getPurchasedBooksList(new JSONParser()
.getJSONFromList(params[0], params[1]));
return true;
} catch (Exception e) {
return false;
}
}
@Override
protected void onPostExecute(Boolean result) {
if (result) {
dialog.dismiss();
// Sets the adapter to the list view
if (listPurchasedBooks != null && listPurchasedBooks.size() > 0) {
listAdapter = new PurchasedBookListAdapter(
MyPurchasesActivity.this, listPurchasedBooks);
bookListView.setAdapter(listAdapter);
}
}
}
}
}