TextUtils.hasArabicCharacters()
的方法上。请看青色条...
我没有找到关于这个方法的任何信息。TextUtils没有hasArabicCharacters,所以我猜它是一些专有的东西——> CyanogenMod?如果我在任何模拟器上跟踪相同的代码,则不会调用名为“hasArabicCharacters”的方法,并且自动完成行为非常快。在Android 2.1、2.3.3和4.1.2模拟器下测试通过。
这是调用链(向上):
TextUtils.hasArabicCharacter() -> TextUtils.reshapeArabic() -> Paint.measureText() -> Styled.drawDirectionalRun() -> Styled.measureText() -> BoringLayout.isBoring() -> TextView.onMeasure() -> View.measure() -> ListView.measureScrapChild() -> ListView.measureHeightOfChildren() -> AutoCompleteTextView.buildDropdown() -> AutoCompleteTextView.showDropDown() -> AutoCompleteTextView.updateDropDownForFilter() -> AutoCompleteTextView.access$1700 -> AutoCompleteTextView$PopulateDataSetObserver$1.run() -> Handler.handleCallback() -> Handler.dispatchMessage()
这是我如何填充我的适配器。也许有一些解决方法可以应用。有什么想法吗?
活动:
final StreetArrayAdapter adapter = new StreetArrayAdapter(this, R.layout.simple_dropdown_item_1line);
autoCompleteTextView.setAdapter(adapter);
autoCompleteTextView.setValidator(new Validator());
autoCompleteTextView.setThreshold(0);
autoCompleteTextView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
streetInfoField.setText("");
}
});
autoCompleteTextView.addTextChangedListener(new StreetTextWatcher(adapter));
......
class Validator implements AutoCompleteTextView.Validator {
@Override
public CharSequence fixText(CharSequence invalidText) {
return "";
}
@Override
public boolean isValid(CharSequence text) {
Log.v(TAG, "Checking if valid: " + text);
String[] streets = StreetNameFactory.getStreetsWithLetter(text.subSequence(0, 1).toString().toUpperCase(Locale.US));
Arrays.sort(streets);
if (Arrays.binarySearch(streets, text.toString()) >= 0) {
return true;
}
return false;
}
}
StreetNameFactory.getStreetsWithLetter
public static String[] getStreetsWithLetter(String letter) {
Log.i(StreetNameFactory.class.getSimpleName(), "letter:" + letter);
if ("A".equals(letter)) {
return StreetNames.STREETS_A;
}
if ("Ä".equals(letter)) {
return StreetNames.STREETS_A;
}
if ("B".equals(letter)) {
return StreetNames.STREETS_B;
}
.....
StreetTextWatcher:
public class StreetTextWatcher implements TextWatcher {
private final StreetArrayAdapter adapter;
private boolean alreadyAdded = false;
public StreetTextWatcher(StreetArrayAdapter adapter) {
this.adapter = adapter;
}
@Override
public void afterTextChanged(Editable s) {
//not used
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
if (s.length() < 1) {
adapter.clear();
alreadyAdded = false;
}
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (s.length() == 1) {
populateAdapter(s);
alreadyAdded = true;
}
}
private synchronized void populateAdapter(CharSequence s) {
String charSequence = s.toString().toUpperCase(Locale.US);
if (charSequence.startsWith("A") && !alreadyAdded) {
adapter.addAll(StreetNames.STREETS_A);
}
if (charSequence.startsWith("Ä") && !alreadyAdded) {
adapter.addAll(StreetNames.STREETS_A);
}
if (charSequence.startsWith("B") && !alreadyAdded) {
adapter.addAll(StreetNames.STREETS_B);
}
if (charSequence.startsWith("C") && !alreadyAdded) {
adapter.addAll(StreetNames.STREETS_C);
}
if (charSequence.startsWith("D") && !alreadyAdded) {
adapter.addAll(StreetNames.STREETS_D);
}
if (charSequence.startsWith("E") && !alreadyAdded) {
adapter.addAll(StreetNames.STREETS_E);
}
//more code....
if (charSequence.startsWith("Z") && !alreadyAdded) {
adapter.addAll(StreetNames.STREETS_Z);
}
if (Pattern.matches("[1-9]", s.toString()) && !alreadyAdded) {
adapter.addAll(StreetNames.STREETS_NUMBERS);
}
}
}
StreetArrayAdapter:
public class StreetArrayAdapter extends ArrayAdapter<String> {
private final String TAG = StreetArrayAdapter.class.getSimpleName();
public StreetArrayAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
}
public void addAll(String[] streets) {
Log.i(TAG, "BEGIN LIST FILL at: " + new Date(System.currentTimeMillis()).toString());
for (String street : streets) {
add(street);
}
Log.i(TAG, "END LIST FILL at: " + new Date(System.currentTimeMillis()).toString());
}
}
STREETS_A, STREETS_B, STREETS_C是我分配的字符串数组。
[更新]
我找到了一个好的解决方法。当我输入第一个字母时,不能加载列表。当我在输入至少3个字母后加载列表(StreetTextWatcher.onTextChange),我没有冻结,下拉菜单再次非常快速。此外,用户可能甚至不会注意到变化。
TextUtils.hasArabicCharacters()
是从TextUtils.reshapeArabic()
调用的。哪个方法在 traceview 的 "Parents" 下调用了TextUtils.reshapeArabic()
? - Adam StelmaszczykezGingerBread1.0
吗? - techi.services