android - EditTextAndroidのTextWatcherでエラーが発生しました

Question

に実装しようとしTextWatcherていEditTextます。私EditTextは自分のアプリでを使用し、それを見ていきましたTextWatcher。

バーに「a」のようなアルファベットを入力するとEditTextカーソルは機能しますが、「ab *」のような次のアルファベットを書くとカーソルがまったく機能せず、これらの文字を削除するとエラーが発生し、アプリがクラッシュします。何が欠けているのか理解できません。

これが私のコードです：

TextWatcher myTextWatcher = new TextWatcher() {

    @Override
    public void onTextChanged(CharSequence s, int start, int before,
    int count) {

        if (start == 0) {


            SearchWordString.clear();

            Cursor cursor = managedQuery(DictionaryProvider.CONTENT_URI, null, null,
            new String[] {(search.getText().toString())}, null);



            while(cursor.isAfterLast()==false)
            {




                SearchWordString.add(cursor.getString(1)); 



                cursor.moveToNext();
            }



            listAdapter.notifyDataSetChanged();

            viewFlipper.showNext();
        } else {

        }

        listAdapter.notifyDataSetChanged();
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count,
    int after) {

    }

    @Override
    public void afterTextChanged(Editable s) {





    }
};

そしてこれは私のLogCATです

01-15 04:54:25.080: W/dalvikvm(29324): threadid=1: thread exiting with uncaught exception (group=0x40b811f8)
01-15 04:54:25.103: E/AndroidRuntime(29324): FATAL EXCEPTION: main
01-15 04:54:25.103: E/AndroidRuntime(29324): java.lang.NullPointerException
01-15 04:54:25.103: E/AndroidRuntime(29324):    at com.ilmasoft.GPD.Start$2.onTextChanged(Start.java:1432)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.widget.TextView.sendOnTextChanged(TextView.java:8085)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.widget.TextView.handleTextChanged(TextView.java:8132)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.widget.TextView$ChangeWatcher.onTextChanged(TextView.java:8495)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.SpannableStringBuilder.sendTextChange(SpannableStringBuilder.java:892)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:389)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:266)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:443)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.SpannableStringBuilder.delete(SpannableStringBuilder.java:216)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.SpannableStringBuilder.delete(SpannableStringBuilder.java:29)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.method.BaseKeyListener.backspaceOrForwardDelete(BaseKeyListener.java:90)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.method.BaseKeyListener.backspace(BaseKeyListener.java:45)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.method.BaseKeyListener.onKeyDown(BaseKeyListener.java:151)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.method.QwertyKeyListener.onKeyDown(QwertyKeyListener.java:352)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.text.method.TextKeyListener.onKeyDown(TextKeyListener.java:132)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.widget.TextView.doKeyDown(TextView.java:5716)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.widget.TextView.onKeyDown(TextView.java:5531)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.view.KeyEvent.dispatch(KeyEvent.java:2608)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.view.View.dispatchKeyEvent(View.java:5547)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1246)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:2021)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1382)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.app.Activity.dispatchKeyEvent(Activity.java:2324)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1948)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.view.ViewRootImpl.deliverKeyEventPostIme(ViewRootImpl.java:3360)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2618)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.os.Looper.loop(Looper.java:137)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at android.app.ActivityThread.main(ActivityThread.java:4511)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at java.lang.reflect.Method.invokeNative(Native Method)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at java.lang.reflect.Method.invoke(Method.java:511)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
01-15 04:54:25.103: E/AndroidRuntime(29324):    at dalvik.system.NativeStart.main(Native Method)

score 2 · Accepted Answer

変化があるということstartの最初のポイントは私の理解です。が0でsあるかどうかを確認するためのチェックを行わないようにしてくださいstart

score 1 · Accepted Answer

これが私のコードです。

mEdtSearchCity =  (AutoCompleteTextView) findViewById(R.id.edtSearchCity);

mEdtSearchCity.addTextChangedListener(this);

public class SearchCityListActivity extends Activity implements OnItemClickListener,TextWatcher

@Override
    public void afterTextChanged(Editable s) {
        // TODO Auto-generated method stub
        String cityName = mEdtSearchCity.getText().toString();
        cityName = mEdtSearchCity.getText().toString();
        Log.d(TAG, "text changed "+cityName);
        if ( !(cityName.equals("")) ){
        lookupTimeZone(cityName);
        }else{
            adapter.clear();
            adapter.notifyDataSetChanged();
        }
    }
private void lookupTimeZone(String s){
        Log.d(TAG, "cityname "+s); 
        ArrayList<LocationVO> alist = null;
        alist = lookup.getTimeZoneForCity(s);
        Log.d(TAG, "lookup list "+alist.size());

        if ( alist.size() != 0  ){
            //arrayCity.clear();
            adapter.clear();
            LocationVO lo = new LocationVO();
            for ( int i = 0; i < alist.size(); i++) {
                lo = alist.get(i);
                searchResults.add(lo);
            }
            adapter.notifyDataSetChanged();
        }else {
            //Toast.makeText(SearchCityListActivity.this, "No results found", Toast.LENGTH_SHORT).show();
            Log.d(TAG, "No data");
            adapter.clear();

        }

public ArrayList<LocationVO> getTimeZoneForCity(String s){
        Cursor c ;
        try{
        String city = s;
        if ( city.contains("'") ){
            Log.d(TAG, "matched");
            String [] as = city.split("'");
            Log.d(TAG, "st "+as[0]+"''"+as[1]);
            c = theDatabase.query("data", new String[] {KEY_CITY, KEY_TIMEZONE, KEY_COUNTRY, KEY_TIMEZONE_DISPLAY_NAME, KEY_TIMEZONE_ID},KEY_CITY+" like '"+as[0]+"''"+as[1]+"%';", null, null, null, null, null);
        }else{
        c = theDatabase.query("data", new String[] {KEY_CITY, KEY_TIMEZONE, KEY_COUNTRY, KEY_TIMEZONE_DISPLAY_NAME, KEY_TIMEZONE_ID},KEY_CITY+" like '"+city+"%';", null, null, null, null, null);
        Log.d(TAG, "Query:- "+c.toString());
        }
        }catch(Exception e){
            Log.d(TAG, "Error getting Timezone for "+KEY_CITY+" : "+e.getMessage());
            ArrayList<LocationVO> a = new ArrayList<LocationVO>();
            return a;
        }

        int count = c.getCount();
        Log.d(TAG, "count "+count);

        if(count == 0){
            ArrayList<LocationVO> list = new ArrayList<LocationVO>();
            Log.d(TAG, "null list"+list);
            return list;
        }
        Log.d(TAG, "outside bound");
        c.moveToFirst();

        ArrayList<LocationVO> list = new ArrayList<LocationVO>();
        for(int i=0;  i<count; i++){

            LocationVO vo = new LocationVO();
            vo.cityName = c.getString(0);
            vo.countryName = c.getString(2);
            vo.setTimezoneString(c.getString(1));
            vo.setTimeZoneDisplayName(c.getString(3));
            vo.setTimeZoneId(c.getString(4));
            list.add(vo);
            c.moveToNext();
        }

        c.close();
        return list;
    }

android - EditTextAndroidのTextWatcherでエラーが発生しました

2 に答える 2

Related

Reference