I get email from accounts, then use that to look up display name

gistfile1.java

		String email = null;

		// get email address from first system account that looks like an email
		AccountManager manager = AccountManager.get(this);
		for (Account account : manager.getAccounts())
			if (account.name.contains("@") && account.name.contains(".")) {
				email = account.name;
				EditText keyEmail = (EditText) findViewById(R.id.keyEmail);
				keyEmail.setText(email);
				break;
			}
		if (email == null)
			return;

		// use that email to look up the name in Contacts
		final String[] projection = {
				Contacts.DISPLAY_NAME,
				CommonDataKinds.Email.DATA,
		};
		Cursor cursor = getContentResolver().query(
				CommonDataKinds.Email.CONTENT_URI,
				projection,
				CommonDataKinds.Email.DATA + " = ?",
				new String[]{email},
				null);
		if (cursor != null && cursor.getCount() > 0 && cursor.moveToNext()) {
			String name = cursor.getString(cursor.getColumnIndex(Contacts.DISPLAY_NAME));
			EditText keyName = (EditText) findViewById(R.id.keyName);
			keyName.setText(name);
		}