选择多个联系人以发送消息

Question

我无法一次选择多个联系人来一次向所有联系人发送消息，所以请解释一下该怎么做？ 我已经尝试过Stack Overflow上可用的其他解决方案，但无法完成任务。 我的代码在下面。

在Oncreate方法中：

//Action perform when floating button clicked to add contacts
        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Uri uri = Uri.parse("content://contacts");
                Intent intent = new Intent(Intent.ACTION_PICK, uri);
                intent.setType(ContactsContract.CommonDataKinds.Phone.CONTENT_TYPE);
                startActivityForResult(intent, REQUEST_CODE);
            }
        });

然后在onCreate之外：

@Override
    protected void onActivityResult(int requestCode, int resultCode,
                                    Intent intent) {
        if (requestCode == REQUEST_CODE) {
            if (resultCode == RESULT_OK) {
                Uri uri = intent.getData();

                String[] projection = { ContactsContract.CommonDataKinds.Phone.NUMBER, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME };

                Cursor cursor = getContentResolver().query(uri, projection,
                        null, null, null);
                cursor.moveToFirst();

                int numberColumnIndex = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
                String number = cursor.getString(numberColumnIndex);

                int nameColumnIndex = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
                String name = cursor.getString(nameColumnIndex);

                Log.d(TAG, "ZZZ number : " + number +" , name : "+name);

            }
        }
    };