android：打开系统联系人界面并获取数据

在android应用程序的开发中，经常要实现的一个功能是调用系统自带的联系人界面，做到选择人之后，取得相应的名称和号码，并返回。

android2.0前后实现方式上也有一定的差别：主要是2.0及以上版本联系人API发生了变化，由原来的Contacts变成了ContactsContract。

（一） 2.0之前取联系人列表的方式： 声明意图方式一 Intent intent = new Intent(); intent.setAction(Intent.ACTION_PICK); intent.setData(Contacts.People.CONTENT_URI); startActivityForResult(intent, PICK_CONTACT );
声明意图方式二 Intent intent = new Intent(Intent.ACTION_PICK); intent.setType("Contacts.People.CONTENT_TYPE");//vnd.android.cursor.dir/person startActivityForResult(intent, PICK_CONTACT );
实现onActivityResult

protected void onActivityResult (int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        switch (requestCode) {            case   PICK_CONTACT   :                if (data == null) {                    return;                }                Uri uri = data.getData();                Cursor cursor = getContentResolver().query(uri, null, null, null, null);                cursor.moveToFirst();                String number = cursor.getString(cursor.getColumnIndexOrThrow(Phones.NUMBER));                Log.d(TAG, "number" + number);                mContactText.setText(number);                mContactText.setSelection(number.length());                break;                        default:                break;        }    }

（二） 2.0之后取联系人列表的方式：
声明意图方式一
Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI); startActivityForResult(intent, PICK_CONTACT);
声明意图方式二 Intent intent = new Intent(Intent.ACTION_PICK); intent.setType(ContactsContract.Contacts.CONTENT_TYPE);//vnd.android.cursor.dir/contact startActivityForResult(intent, PICK_CONTACT);

实现onActivityResult

private static final int PICK_CONTACT = 0; @Override    public void onActivityResult(int reqCode, int resultCode, Intent data) {        super.onActivityResult(reqCode, resultCode, data);                switch (reqCode) {            case (PICK_CONTACT):                if (resultCode == Activity.RESULT_OK) {                    Uri contactData = data.getData();                    Cursor c = managedQuery(contactData, null, null, null, null);                    if (c.moveToFirst()) {                        String name = c.getString(c.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));                        String hasPhone = c.getString(c.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER));                        String contactId = c.getString(c.getColumnIndex(ContactsContract.Contacts._ID));                        String phoneNumber = null;                        if (hasPhone.equalsIgnoreCase("1")) {                            hasPhone = "true";                        }                        else {                            hasPhone = "false";                        }                        if (Boolean.parseBoolean(hasPhone)) {                            Cursor phones = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI,                                                                       null,                                                                       ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = "                                                                               + contactId,                                                                       null,                                                                       null);                            while (phones.moveToNext()) {                                phoneNumber = phones.getString(phones.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));                            }                            phones.close();                        }                                            }                }                break;        }    }

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