java - Why cursor.moveToFirst() should be called while we using cursor? -

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इस सवाल का पहले से ही एक उत्तर है: < / P>

  • 5 जवाब

शीर्षक की तरह, मुझे लगता है उस बारे में हैरान उदाहरण:

<पूर्व> यूरी संपर्क डेटा = डेटा.getData (); स्ट्रिंग [] प्रक्षेपण = {Phone.NUMBER}; कर्सर c = getContentResolver ()। क्वेरी (संपर्क डेटा, प्रक्षेपण, रिक्त, रिक्त, रिक्त); c.moveToFirst (); इंट कॉलम = सी.गेट कॉलम इंडेक्स (फोन। संख्या); स्ट्रिंग num = c.getString (स्तंभ);

आप query से प्राप्त कर्सर शुरू होता है पहले रिकॉर्ड से पहले।

तो इसका इस्तेमाल करने के लिए, आपको इसे कहीं भी रखना होगा।


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