android - 如何单击 ListView 项并获取电话号码？

Question

点击列表项后无法获取列表项信息

到目前为止，我已经看了很多溢出问题，我不知道我的 ListView 是否设置正确，但我不想弄乱我是如何获得联系人的

public class ViewContacts extends AppCompatActivity {

    private ListView lv;
    private Cursor cursor1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_view_contacts);

        cursor1 = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null);
        startManagingCursor(cursor1);
        String[] from = {ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME, ContactsContract.CommonDataKinds.Phone.NUMBER, ContactsContract.CommonDataKinds.Phone._ID};

        int[] to = {android.R.id.text1, android.R.id.text2};
        final SimpleCursorAdapter listAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, cursor1, from, to);

        ListView lv = findViewById(R.id.list);
        lv.setAdapter(listAdapter);
        lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                AlertDialog.Builder option = new AlertDialog.Builder(ViewContacts.this);

                option.setMessage(the phone number);
                option.show();
                }
        });

    }
}

点击列表项，然后弹出显示电话号码

Answer 1

如果你想要你点击的联系人项目的电话号码，你需要使用position将光标移动到相应的行，然后获取该项目来自所需的列。

下面是您放入 onItemClick 中的简化示例:

cursor1.moveToPosition(position);
String phoneNumber = cursor1.getString(cursor1.getColumnIndexOrThrow(ContactsContract.CommonDataKinds.Phone.NUMBER));

您可以将 ContactsContract.CommonDataKinds.Phone.NUMBER 替换为任何有效的列名。