I am able to retrieve the contact ID, but then later I wish to separately retrieve the phone number based on the contact ID. The code below is returning a null result for the phone number. (I do wish later to retrieve the name and phone number together and populate a view, but I am just trying to get the phone number to work first).
In my onCreate I have this code
String phoneNum = getPhoneNumber(myID);
TextView phoneTextView = (TextView) findViewById(R.id.textViewPhone);
phoneTextView.setText(phoneNum);
This is the method for getPhoneNumber()
protected String getPhoneNumber(String id) {
ArrayList<String> phones = new ArrayList<String>();
Cursor cursor = getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",
new String[]{id}, null);
while (cursor.moveToNext()) {
phones.add(cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)));
}
cursor.close();
String phoneNum;
phoneNum = phones.get(0);
return phoneNum;
}//end getPhoneNumber();
}
This produces the error java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0, which I plan on creating some error handling for. But still, I am certain I have the ID from the previous code, so I don't know why the ArrayList returns null. If you would like to see that code, it is also in my onCreate:
Cursor cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
if (cursor.getCount() != 0) {
int numContacts = cursor.getCount();
ArrayList<String> idList = new ArrayList<>();
Random rand = new Random();
int randomNum = rand.nextInt(numContacts);
while (cursor.moveToNext()) {
String id = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID));
idList.add(id);
}
myID = idList.get(randomNum);
String myString = Integer.toString(randomNum);
TextView myTextView = (TextView) findViewById(R.id.textViewID);
myTextView.setText(myString);
if (myID != null) {
myTextView.setText(myID);
} else {
myTextView.setText("Try Again!");
}
} else {
Toast.makeText(getApplicationContext(), "Your have no contacts.", Toast.LENGTH_SHORT).show();
}
cursor.close();