Question

我已经使用以下代码将用户的联系人检索到列表中，现在我正在进行下一步（获取每个联系人的个人信息）：

package com.example.mycontacts;

import android.app.LoaderManager;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Loader;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.v4.app.ListFragment;
import android.widget.CursorAdapter;
import android.widget.SimpleCursorAdapter;

/**
 * Created by daniel on 28/02/2016.
 */
public class ContactListFragment  extends ListFragment implements LoaderManager.LoaderCallbacks<Cursor> {

    private CursorAdapter mAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        // create adapter once
        Context context = getActivity();
        int layout = android.R.layout.simple_list_item_1;
        Cursor c = null; // there is no cursor yet
        int flags = 0; // no auto-requery! Loader requeries.
        mAdapter = new SimpleCursorAdapter(context, layout, c, FROM, TO, flags);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        // each time we are started use our listadapter
        setListAdapter(mAdapter);
        // and tell loader manager to start loading
        getActivity().getLoaderManager().initLoader(0, null, (android.app.LoaderManager.LoaderCallbacks<Cursor>) this);
    }

    // columns requested from the database
    private static final String[] PROJECTION = {
            ContactsContract.Contacts._ID, // _ID is always required
            ContactsContract.Contacts.DISPLAY_NAME_PRIMARY // that's what we want to display
    };

    // and name should be displayed in the text1 textview in item layout
    private static final String[] FROM = { ContactsContract.Contacts.DISPLAY_NAME_PRIMARY };
    private static final int[] TO = { android.R.id.text1 };

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {

        // load from the "Contacts table"
        Uri contentUri = ContactsContract.Contacts.CONTENT_URI;

        // no sub-selection, no sort order, simply every row
        // projection says we want just the _id and the name column
        return new CursorLoader(getActivity(),
                contentUri,
                PROJECTION,
                null,
                null,
                null);
    }



    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        // Once cursor is loaded, give it to adapter
        mAdapter.swapCursor(data);
    }

    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        // on reset take any old cursor away
        mAdapter.swapCursor(null);
    }
}

问题是，我无法在列表的onItemClick（）中找到从每个联系人获取信息的方法。有什么想法吗？

修改我实际上补充说：

ListView newsList = new ListView(getActivity());
    newsList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        }
    });

但不知道如何继续以及如何与光标互动。

EDIT2

我使用listview将它从listfragment更改为dialogFragment，但仍然没有通过按下项目（列表中）来获取联系人的号码。我在这里错过了什么？

> package com.example...;

import android.app.LoaderManager;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Loader;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;

/**
 * Created by daniel on 28/02/2016.
 */
public class DialogFragment extends android.support.v4.app.DialogFragment implements LoaderManager.LoaderCallbacks<Cursor> {
    private TextView dateView;
    private Spinner actionSpinner;
    private Button okButton;
    private CursorAdapter mAdapter;
    private TimePicker timePicker;
    private static final String[] FROM = { ContactsContract.Contacts.DISPLAY_NAME_PRIMARY };
    private static final int[] TO = { android.R.id.text1 };
    private ListView list;


    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.dialog,container,false);


        Context context = getActivity();
        int layout = android.R.layout.simple_list_item_1;
        Cursor c = null; // there is no cursor yet
        int flags = 0; // no auto-requery! Loader requeries.
        mAdapter = new SimpleCursorAdapter(context, layout, c, FROM, TO, flags);

        actionSpinner = (Spinner)v.findViewById(R.id.actionSpinner);
        okButton = (Button)v.findViewById(R.id.saveButton);
        list = (ListView)v.findViewById(R.id.listView);




        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(),
        R.array.actions, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        actionSpinner.setAdapter(adapter);

        okButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getDialog().dismiss();
                Comm comm = (Comm) getActivity();
                comm.pick();
            }
        });

        list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                mAdapter.getItem(position);
                Toast.makeText(getActivity(), String.valueOf(position), Toast.LENGTH_SHORT).show();
            }
        });





        return v;
    }


    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);


        }

    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        list.setAdapter(mAdapter);
        // and tell loader manager to start loading
        getActivity().getLoaderManager().initLoader(0, null, (android.app.LoaderManager.LoaderCallbacks<Cursor>) this);
    }

    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args) {

        // load from the "Contacts table"
        Uri contentUri = ContactsContract.Contacts.CONTENT_URI;

        // no sub-selection, no sort order, simply every row
        // projection says we want just the _id and the name column
        return new CursorLoader(getActivity(),
                contentUri,
                PROJECTION,
                null,
                null,
                null);    }

    private static final String[] PROJECTION = {
            ContactsContract.Contacts._ID, // _ID is always required
            ContactsContract.Contacts.DISPLAY_NAME_PRIMARY // that's what we want to display
    };

    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
        mAdapter.swapCursor(data);

    }



    @Override
    public void onLoaderReset(Loader<Cursor> loader) {
        mAdapter.swapCursor(null);

    }


}

Android将用户的联系人放入列表后，无法使用它们

0 个答案: