私は問題に直面しています。すべての連絡先とその最近の呼び出し日を受信していますが、呼び出し日を日付形式に変換しようとすると、long = null の値の場合に NumberFormatException がスローされます。
すべてのcalldatesを日付形式に変換する方法を知りたいのですが、nullが発生した場合、日付形式に変換されません..以下は私のコードヘルプplzです..
mCursor.moveToFirst();
while(!mCursor.isAfterLast()) {
String calldate="";
JSONObject contact = new JSONObject();
JSONObject parentCont = new JSONObject();
SharedPreferences settings = getSharedPreferences(Sesssion.PREF_NAME,0);
settings.getBoolean("phnosaved", true);
String usernumber= settings.getString(Sesssion.knumber,"hey" );
String name = mCursor.getString(mCursor.getColumnIndex(Phone.DISPLAY_NAME));
String number = mCursor.getString(mCursor.getColumnIndex(Phone.NUMBER));
String selection = android.provider.CallLog.Calls.NUMBER+"="+"\""+number+"\"";
Log.d("selection query", "selection"+selection);
String Order = android.provider.CallLog.Calls.DATE + " DESC";
Cursor managedCursor = managedQuery(CallLog.Calls.CONTENT_URI,null, selection,null, null);
if (managedCursor.moveToFirst ()) {
do {
calldate= managedCursor.getString (managedCursor.getColumnIndex (android.provider.CallLog.Calls.DATE));
break;
} while (managedCursor.moveToNext());
}
//String callDate = managedCursor.getString(managedCursor.getColumnIndex(android.provider.CallLog.Calls.DATE));
Date callDayTime = new Date(Long.valueOf(calldate));
//String dateColumn = cursorcalllog.getString(cursorcalllog.getColumnIndex(CallLog.Calls.DATE));
Log.d("CONTACT", "Name: " + name + "| Number: " + number+"Recently Called"+callDayTime);
logcat:-
04-03 13:13:52.231: E/AndroidRuntime(16548): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.socialize_us/com.example.socialize_us.PhoneBookActivity}: java.lang.NumberFormatException: Invalid long: ""
04-03 13:13:52.231: E/AndroidRuntime(16548): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2084)
04-03 13:13:52.231: E/AndroidRuntime(16548): at android.app.ActivityThread.startActivityNow(ActivityThread.java:1924)
04-03 13:13:52.231: E/AndroidRuntime(16548): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
04-03 13:13:52.231: E/AndroidRuntime(16548): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)