我的 android 应用程序中显示了联系人列表。单击名称后，如何将数字保存到字符串中？

Question

我有以下代码可以在我的屏幕上显示联系人列表：

public class MainActivity extends ListActivity {


    @Override
    public int getSelectedItemPosition() {
        return super.getSelectedItemPosition();
    }

    @Override
    public long getSelectedItemId() {
        return super.getSelectedItemId();
    }

    ListView lv;
    Cursor cursor1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        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};

        SimpleCursorAdapter listadapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_2, cursor1, from, to );
        setListAdapter(listadapter);

        lv = getListView();
        lv.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

我想让用户能够通过单击姓名将号码保存在字符串中。我应该如何开始？

Answer 1

您可以在列表视图上实现 setOnItemClickListener，然后使用光标和 moveToPosition 方法将位置作为参数传递来获取位置，然后再次使用光标从名称中获取数字，如下所示：

lv.setOnItemClickListener(new AdapterView.OnItemClickListener(){ @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id){ cursor1.moveToPosition(position); Toast.makeText(getApplicationContext(), cursor1.getString(cursor1.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER)), Toast.LENGTH_SHORT).show(); } });

注意我没有测试代码所以我不知道我是对的。

我的 android 应用程序中显示了联系人列表。单击名称后，如何将数字保存到字符串中？

I have the list of contacts appear in my android App. How is it possible that upon clicking on the name, it saves the number into a String?

android

listview

android-contacts

android-studio