填充AutoCompleteTextView时出现Android性能问题
我有一个动态填充的AutoCompleteTextView。我动态地这样做,因为我有大约10000个提案(街道)要展示,所以我根据它们的第一个字母来划分列表。假设有人输入“a”,我用以“a”开头的所有街道填充适配器。这在emulator中运行得很快,在我的旧手机Android 2.1上运行得也很快。突然,我意识到清单的填写非常缓慢。填充大约需要10秒。但我认为这不是我的代码问题,而是我的手机问题。不久前,我用CyanogenMod 7.2.0-blade升级到Android 2.3.7。我绝对肯定我以前从来没有遇到过这个问题,因为我永远不会在生产中投入一些滞后的实现。我在跟踪时认出了一些奇怪的东西。所有性能都浪费在名为填充AutoCompleteTextView时出现Android性能问题,android,performance,autocompletetextview,cyanogenmod,Android,Performance,Autocompletetextview,Cyanogenmod,我有一个动态填充的AutoCompleteTextView。我动态地这样做,因为我有大约10000个提案(街道)要展示,所以我根据它们的第一个字母来划分列表。假设有人输入“a”,我用以“a”开头的所有街道填充适配器。这在emulator中运行得很快,在我的旧手机Android 2.1上运行得也很快。突然,我意识到清单的填写非常缓慢。填充大约需要10秒。但我认为这不是我的代码问题,而是我的手机问题。不久前,我用CyanogenMod 7.2.0-blade升级到Android 2.3.7。我绝对肯
TextUtils.hasArabicCharacters()的方法上。请看青色条
我找不到关于这个方法的任何东西。TextUtils没有hasarabiccharacter,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
这是调用链(向上):
TextUtils.hasArabicCharacter()->TextUtils.reformearabic()->
Paint.measureText()->Styled.drawDirectionalRun()->
Styled.measureText()->BoringLayout.isBoring()->
TextView.onMeasure()->View.measure()->ListView.measureScrapChild()
->ListView.MeasureHeightoChildren()->AutoCompleteTextView.buildDropdown()->
AutoCompleteTextView.showDropDown()->
AutoCompleteTextView.updateDropDownForFilter()->
AutoCompleteTextView.access$1700->
AutoCompleteTextView$PopulateDataSetObserver$1.run()->
Handler.handleCallback()->Handler.dispatchMessage()
这就是我填充适配器的方式。也许我可以申请一些变通办法。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;
}
}
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);
}
}
}
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());
}
}
StreetTextWatcher:
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;
}
}
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);
}
}
}
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());
}
}
公共类StreetTextWatcher实现TextWatcher{
专用最终街道适配器;
私有布尔值alreadyAdded=false;
公共StreetExtWatcher(StreetArray适配器){
this.adapter=适配器;
}
@凌驾
公共无效后文本已更改(可编辑){
//不用
}
@凌驾
更改前文本之前的公共void(字符序列s、int start、int count、int after){
如果(s.长度()<1){
适配器。清除();
alreadyAdded=假;
}
}
@凌驾
public void onTextChanged(字符序列,int start,int before,int count){
如果(s.长度()==1){
民众适应者;
alreadyAdded=true;
}
}
私有同步的void populateAdapter(字符序列){
String charSequence=s.toString().toUpperCase(Locale.US);
if(charSequence.startsWith(“A”)&&!已添加){
adapter.addAll(StreetNames.STREETS_A);
}
if(已添加的字符序列开始){
adapter.addAll(StreetNames.STREETS_A);
}
if(charSequence.startsWith(“B”)&&!已添加){
adapter.addAll(StreetNames.STREETS_B);
}
if(charSequence.startsWith(“C”)和&!alreadyAdded){
adapter.addAll(StreetNames.STREETS_C);
}
if(charSequence.startsWith(“D”)和&!alreadyAdded){
adapter.addAll(StreetNames.STREETS\u D);
}
if(charSequence.startsWith(“E”)&&!已添加){
adapter.addAll(StreetNames.STREETS_E);
}
//更多代码。。。。
if(charSequence.startsWith(“Z”)&&!已添加){
adapter.addAll(StreetNames.streetsz);
}
if(Pattern.matches(“[1-9]”),s.toString())&&&!alreadyAdded){
adapter.addAll(街道名称、街道编号);
}
}
}
StreetArray适配器:
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;
}
}
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);
}
}
}
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());
}
}
public类streetrayadapter扩展了ArrayAdapter{
private final String TAG=streetarayadapter.class.getSimpleName();
公共StreetArray适配器(上下文,int textViewResourceId){
super(上下文,textViewResourceId);
}
公共void addAll(字符串[]街道){
Log.i(标记,“开始列表填充时间:”+新日期(System.currentTimeMillis()).toString());
适用于(字符串街:街道){
加设(街道);;
}
Log.i(标记,“结束列表填写时间:”+新日期(System.currentTimeMillis()).toString());
}
}
STREETS\u A、STREETS\u B、STREETS\u C只是我分配的字符串数组
[更新]
我找到了一个很好的解决办法。输入第一个字母时,我不能加载列表。当我在输入至少3个字母(StreetTextWatcher.onTextChange)后加载列表时,我没有冻结,而且下拉速度非常快。此外,用户甚至可能不认识到更改 我认为这是CyanogenMod 7.2的一个缺陷
查看源代码可以发现,在每个(在您的例子中)调用中,都会调用BoringLayout.isBoring()
,这看起来是一个相当繁重的方法(它也调用了很多其他方法)
我认为在代码中解决这个问题可能很困难。我在寻找一些标志,也许你可以设置它来省略这个沉重的“阿拉伯语”方法,比如setIsArabic(false)
,但我没有找到任何东西。也许您可以像建议的那样替换例如Styled.measureText()
的字节码,但这似乎相当耗时
在较新的版本中,例如CyanogenMod 10.1,其行为是不同的。因此,也许只要升级您的CyanogenMod,问题就会消失。TextUtils.hasArabic