如何将ListView放入Fragment中

Question

我有一个非常大的问题，对我来说这是......所以在这里 我有一个包含TextView和Button的片段，当我单击按钮并选择联系人时，我需要存储在ListView中的数字和名称以及名称和编号的右侧我想要一个按钮，这样就可以了选择的联系人可以删除...我不知道你是否理解，所以在ListView中所有将被存储为单个项目，名称下面的名称是联系人的号码，右侧是删除按钮...我知道我必须使用自定义适配器，但我只是不明白。

以下是我的适配器的代码

private class MessageAdapter extends ArrayAdapter<Message> {

        public MessageAdapter(ArrayList<Message> messages) {
            super(getActivity(), 0, messages);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // If we weren't given a view, inflate one
            if (convertView == null) {
                convertView = getActivity().getLayoutInflater().inflate(
                        R.layout.list_item_contact, null);
            }

            // Configure the view for this Contact
            Message m = getItem(position);

            TextView nameTextView = (TextView) convertView
                    .findViewById(R.id.contact_list_item_nameTextView);
            nameTextView.setText(m.getNames());

            TextView numberTextView = (TextView) convertView
                    .findViewById(R.id.contact_list_item_numberTextView);
            numberTextView.setText(m.getNumbers());

            return convertView;
        }
    }

以下是我尝试将联系人列入清单......

if (requestCode == REQUEST_CONTACT) {
            Uri result = data.getData();
            Log.v("Contact", "Got a result: " + result.toString());

            // get the contact id from the Uri
            String id = result.getLastPathSegment();

            // query for phone numbers for the selected contact id
            Cursor c = getActivity().getContentResolver()
                    .query(Phone.CONTENT_URI, null, Phone.CONTACT_ID + "=?",
                            new String[] { id },
                            ContactsContract.Contacts.DISPLAY_NAME);

            int phoneIdx = c.getColumnIndex(Phone.NUMBER);
            int phoneType = c.getColumnIndex(Phone.TYPE);
            int nameIdx = c.getColumnIndex(Phone.DISPLAY_NAME);

            if (c.getCount() == 1) {
                c.moveToFirst();
                // contact has a single phone number, so there's no need to
                // display a second dialog
                mName = c.getString(nameIdx);
                mNumber = c.getString(phoneIdx);

                // Ovo radim ovako da bih mogao da ih upisem u fajl
                mMessage.setmNames(mName);
                mMessage.setmNumbers(mNumber);
                ((MessageAdapter) getListAdapter()).notifyDataSetChanged();
                c.close();
            }
        }

因此，当我得到所选联系人的号码和姓名时，我想将其添加到列表中，但我总是只获得最后选择的号码和名称...希望您理解我的意思，谢谢。

以下是onCreate和onCreateView，以防万一：

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



        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            // Ovo ispod omogucava da se ugase sve activities i da se vrati na
            // pocetnu valjda
            // Zavisi sta smo stavili da nam bude parent class u xml manifest
            if (NavUtils.getParentActivityName(getActivity()) != null) {
                getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
            }
        }

        mTextField = (EditText) v.findViewById(R.id.message_text);
        mTextField.setText(mMessage.getmText());
        mTextField.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before,
                    int count) {
                mMessage.setmText(s.toString());
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

        mAddContactButton = (Button) v.findViewById(R.id.message_contact);

        mAddContactButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent i = new Intent(Intent.ACTION_PICK,
                        ContactsContract.Contacts.CONTENT_URI);
                startActivityForResult(i, REQUEST_CONTACT);
            }
        });

        return v;
    }

和onCreate

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

        mMessage = new Message();

        UUID messageId = (UUID) getArguments()
                .getSerializable(EXTRA_MESSAGE_ID);

        mMessage = MessageLab.get(getActivity()).getMessage(messageId);

        mMessages = MessageLab.get(getActivity()).getMessages();

        MessageAdapter adapter = new MessageAdapter(mMessages);
        setListAdapter(adapter);

        setHasOptionsMenu(true);
    }

班级

public class MessageFragment extends ListFragment {

    private ArrayList<String> names_list = new ArrayList<String>();
    private ArrayList<String> numbers_list = new ArrayList<String>();
    private ArrayList<Message> mMessages;

    private Message mMessage;

    private EditText mTextField;
    private Button mAddContactButton;

    private String mName, mNumber;
    private String build_name="", build_number="";

    public static final String EXTRA_MESSAGE_ID = "com.falca.emergencymessage.message_id";

    private static final int REQUEST_CONTACT = 2;

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

        mMessage = new Message();

        UUID messageId = (UUID) getArguments()
                .getSerializable(EXTRA_MESSAGE_ID);

        mMessage = MessageLab.get(getActivity()).getMessage(messageId);

        mMessages = MessageLab.get(getActivity()).getMessages();

        MessageAdapter adapter = new MessageAdapter(mMessages);
        setListAdapter(adapter);

        setHasOptionsMenu(true);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            if (NavUtils.getParentActivityName(getActivity()) != null) {
                NavUtils.navigateUpFromSameTask(getActivity());
            }
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

    @TargetApi(11)
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_message, container, false);



        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            // Ovo ispod omogucava da se ugase sve activities i da se vrati na
            // pocetnu valjda
            // Zavisi sta smo stavili da nam bude parent class u xml manifest
            if (NavUtils.getParentActivityName(getActivity()) != null) {
                getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
            }
        }

        mTextField = (EditText) v.findViewById(R.id.message_text);
        mTextField.setText(mMessage.getmText());
        mTextField.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before,
                    int count) {
                mMessage.setmText(s.toString());
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });

        mAddContactButton = (Button) v.findViewById(R.id.message_contact);

        mAddContactButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent i = new Intent(Intent.ACTION_PICK,
                        ContactsContract.Contacts.CONTENT_URI);
                startActivityForResult(i, REQUEST_CONTACT);
            }
        });

        return v;
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode != Activity.RESULT_OK)
            return;
        if (requestCode == REQUEST_CONTACT) {
            Uri result = data.getData();
            Log.v("Contact", "Got a result: " + result.toString());

            // get the contact id from the Uri
            String id = result.getLastPathSegment();

            // query for phone numbers for the selected contact id
            Cursor c = getActivity().getContentResolver()
                    .query(Phone.CONTENT_URI, null, Phone.CONTACT_ID + "=?",
                            new String[] { id },
                            ContactsContract.Contacts.DISPLAY_NAME);

            int phoneIdx = c.getColumnIndex(Phone.NUMBER);
            int phoneType = c.getColumnIndex(Phone.TYPE);
            int nameIdx = c.getColumnIndex(Phone.DISPLAY_NAME);

            if (c.getCount() > 1) { // contact has multiple phone numbers
                final CharSequence[] numbers = new CharSequence[c.getCount()];
                int i = 0;
                if (c.moveToFirst()) {
                    mName = c.getString(nameIdx);
                    while (!c.isAfterLast()) { // for each phone number, add it
                                                // to the numbers array
                        String type = (String) Phone.getTypeLabel(
                                this.getResources(), c.getInt(phoneType), ""); // insert
                                                                                // a
                                                                                // type
                                                                                // string
                                                                                // in
                                                                                // front
                                                                                // of
                                                                                // the
                                                                                // number
                        String number = type + ": " + c.getString(phoneIdx);
                        numbers[i++] = number;
                        c.moveToNext();
                    }
                    // build and show a simple dialog that allows the user to
                    // select a number
                    AlertDialog.Builder builder = new AlertDialog.Builder(
                            getActivity());
                    builder.setTitle(R.string.select_contact_phone_number_and_type);
                    builder.setItems(numbers,
                            new DialogInterface.OnClickListener() {

                                @Override
                                public void onClick(DialogInterface dialog,
                                        int item) {
                                    mNumber = (String) numbers[item];
                                    int index = mNumber.indexOf(":");
                                    mNumber = mNumber.substring(index + 2);

                                    // Ovo radim ovako da bih mogao da ih upisem
                                    // u fajl
                                    build_name += mName + ";";
                                    build_number += mNumber + ";";
                                    mMessage.setmNames(build_name);
                                    mMessage.setmNumbers(build_number);
                                    ((MessageAdapter) getListAdapter()).notifyDataSetChanged();
                                }
                            });
                    AlertDialog alert = builder.create();
                    alert.setOwnerActivity(getActivity());
                    alert.show();

                } else
                    Log.w("Contact", "No results");
            } else if (c.getCount() == 1) {
                c.moveToFirst();
                // contact has a single phone number, so there's no need to
                // display a second dialog
                mName = c.getString(nameIdx);
                mNumber = c.getString(phoneIdx);

                // Ovo radim ovako da bih mogao da ih upisem u fajl
                build_name += mName + ";";
                build_number += mNumber + ";";
                mMessage.setmNames(build_name);
                mMessage.setmNumbers(build_number);
                ((MessageAdapter) getListAdapter()).notifyDataSetChanged();
                c.close();
            }
        }
    }

    @Override
    public void onResume() {
        super.onResume();

        // Update the list view
        ((MessageAdapter) getListAdapter()).notifyDataSetChanged();
    }


    //MessageAdapter sluzi za rucno pravljenje liste poruka
    private class MessageAdapter extends ArrayAdapter<Message> {

        public MessageAdapter(ArrayList<Message> messages) {
            super(getActivity(), 0, messages);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            // If we weren't given a view, inflate one
            if (convertView == null) {
                convertView = getActivity().getLayoutInflater().inflate(
                        R.layout.list_item_contact, null);
            }

            // Configure the view for this Message
            Message m = getItem(position);

            TextView nameTextView = (TextView) convertView
                    .findViewById(R.id.contact_list_item_nameTextView);
            nameTextView.setText(m.getmNames());

            TextView numberTextView = (TextView) convertView
                    .findViewById(R.id.contact_list_item_numberTextView);
            numberTextView.setText(m.getmNumbers());

            return convertView;
        }
    }

    public static MessageFragment newInstance(UUID messageId) {
        Bundle args = new Bundle();
        args.putSerializable(EXTRA_MESSAGE_ID, messageId);

        MessageFragment fragment = new MessageFragment();

        fragment.setArguments(args);

        return fragment;
    }

    @Override
    public void onPause() {
        super.onPause();
        MessageLab.get(getActivity()).saveMessages();
    }
}

Answer 1

您似乎总是更新相同的单个mMessage字段。

mMessage.setmNames(build_name);
mMessage.setmNumbers(build_number);

当您有新条目时，您必须更新ArrayList mMessages。在列表中添加条目。适配器始终将此arrayList作为数据源，因此您必须更新此arrayList。

因此，为每个条目创建一条新消息并将其添加到mMessages数组列表中。