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我工作的大樓目錄應用程序,並做一個地址反向查找時,該代碼將正常工作的第5條記錄,但隨着應用程序強制關閉,如果sqlite的紀錄必須高於5
錯誤崩潰'android.database.CursorIndexOutOfBoundsException:指數0要求, 大小爲0
我已經登錄的記錄數和列索引。表中的前5條記錄產生了預期的結果,但是,超出索引計數的記錄會崩潰。
繼承人的活動代碼:
public class AddressReverse extends Activity implements TextWatcher
{
AutoCompleteTextView actv;
String address[];
private ArrayList<String> results = new ArrayList<String>();
private SQLiteDatabase db;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.address_reverse);
DatabaseHelper helper = new DatabaseHelper(this.getApplicationContext());
db = helper.getWritableDatabase();
Cursor c = db.rawQuery("SELECT address FROM buildings", null);
if (c!=null)
{
if (c.moveToFirst())
{
do
{
String address = c.getString(c.getColumnIndex("address"));
results.add(address);
Log.d("Cursor count", c.getCount()+"");
Log.d("Cursor Index", c.getColumnIndex("address")+"");
}
while (c.moveToNext());
}
c.close();
}
actv = (AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);
actv.addTextChangedListener(this);
actv.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, results));
actv.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO Auto-generated method stub
String address = ((TextView)view).getText().toString();
Intent i =new Intent(getApplicationContext(), BuildingDetails.class);
i.putExtra("building", address);
startActivity(i);
}
});
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
}}
有什麼想法?由於
編輯:繼承人的崩潰的logcat的:
E/AndroidRuntime(8952): FATAL EXCEPTION: main
E/AndroidRuntime(8952): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dynamite.bible/com.dynamite.bible.BuildingDetails}: android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
E/AndroidRuntime(8952): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2182)
E/AndroidRuntime(8952): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2207)
E/AndroidRuntime(8952): at android.app.ActivityThread.access$600(ActivityThread.java:139)
E/AndroidRuntime(8952): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
E/AndroidRuntime(8952): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(8952): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(8952): at android.app.ActivityThread.main(ActivityThread.java:4899)
E/AndroidRuntime(8952): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(8952): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(8952): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
E/AndroidRuntime(8952): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:558)
E/AndroidRuntime(8952): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(8952): Caused by: android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
E/AndroidRuntime(8952): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:418)
E/AndroidRuntime(8952): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
E/AndroidRuntime(8952): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
E/AndroidRuntime(8952): at com.dynamite.bible.BuildingDetails.onCreate(BuildingDetails.java:40)
E/AndroidRuntime(8952): at android.app.Activity.performCreate(Activity.java:5008)
E/AndroidRuntime(8952): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
E/AndroidRuntime(8952): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2136)
E/AndroidRuntime(8952): ... 11 more
W/ActivityManager( 618): Force finishing activity com.dynamite.bible/.BuildingDetails
W/ActivityManager( 618): Force finishing activity com.dynamite.bible/.AddressReverse
顯示該崩潰的logcat –
從您發佈的例外情況看,它看起來不像,它適用於前5項。例外很明顯,遊標有0個項目,儘管看着你的代碼,這個錯誤不應該出現,因爲所有的錯誤檢查都完成了。因此,做一些挖掘後發佈整個異常堆棧 – nandeesh
好,我發現問題是什麼。當輸入地址時,建築物的地址是建築物的名稱,並且BuildingDetails活動的sql語句遍歷名稱列而不是地址列。我用相同的代碼創建了一個新的活動(除了遍歷地址列外),並且所有內容都很好。感謝你的幫助。 – dynamite