Although this has already been answered, but here is the complete function to get the contact name from number. Hope it will help others:
public static String getContactName(Context context, String phoneNumber) {
ContentResolver cr = context.getContentResolver();
Uri uri = Uri.withAppendedPath(PhoneLookup.CONTENT_FILTER_URI, Uri.encode(phoneNumber));
Cursor cursor = cr.query(uri, new String[]{PhoneLookup.DISPLAY_NAME}, null, null, null);
if (cursor == null) {
return null;
}
String contactName = null;
if(cursor.moveToFirst()) {
contactName = cursor.getString(cursor.getColumnIndex(PhoneLookup.DISPLAY_NAME));
}
if(cursor != null && !cursor.isClosed()) {
cursor.close();
}
return contactName;
}
[Updating based on Marcus’s comment]
You will have to ask for this permission:
<uses-permission android:name="android.permission.READ_CONTACTS"/>