基于水平CardView的定制CardView设计

Question

• 在我的一个应用程序，我有以下的设计，为最喜爱的联系人。我正在从电话中获取最喜欢的联系人，并使用自定义列表适配器将它们显示为附加设计。但问题是，在这两个部分，接触都是重复的。例如，如果有八个最喜欢的联系人，那么它应该通过水平设置联系人来显示四行。但是它正在获取所有八个联系人，并在每一行中显示相同的联系人。
• 希望我在澄清我的观点，我想要什么。这是我的代码，我知道我做错了什么。我尝试过无数种方法，但都没有用。

片段宠儿

public class FragmentFavourites extends Fragment{

ArrayList<String> name = new ArrayList<String>();
ArrayList<String> number = new ArrayList<String>();
ListView f_list;
String starred_id,starred_name,starred_number;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_favourites, container, false);
    f_list=(ListView)rootView.findViewById(R.id.fav_list);
    name.clear();
    number.clear();
    getFavourites();
    return rootView;

}

public void getFavourites()
{
    ContentResolver cr = getActivity().getApplicationContext().getContentResolver();
    Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
            new String[]{ContactsContract.Contacts._ID,
                    ContactsContract.Contacts.DISPLAY_NAME,
                    ContactsContract.Contacts.HAS_PHONE_NUMBER,
                    ContactsContract.Contacts.STARRED}, ContactsContract.Contacts.STARRED + "='1'", null,ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " COLLATE NOCASE ASC");

    while (cur.moveToNext()) {

        starred_id = cur.getString(0);
        starred_name = cur.getString(1);
        name.add(starred_name);
        starred_number=getFavouriteNumber(starred_id);
        number.add(starred_number);

    }
    cur.close();

    FavouriteAdapter fa=new FavouriteAdapter(getActivity(),name,number);
    f_list.setAdapter(fa);
}

public String getFavouriteNumber(String contactId)
{
    ContentResolver cr = getActivity().getApplicationContext().getContentResolver();
    String phone=null;

    Cursor cursor = cr.query(
            ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
            null,
            ContactsContract.CommonDataKinds.Phone.CONTACT_ID +" = ?",
            new String[]{contactId}, null);

    while (cursor.moveToNext())
    {
        phone=cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
    }

    cursor.close();
    return phone;
 }
}

FavouriteAdapter

public class FavouriteAdapter extends BaseAdapter{

Activity context;
ArrayList<String> f_name,f_number;
//String[] name1,name2,number1,number2;
TextView tf_name,tf_number,main_letter,tf_name_t,tf_number_t,main_letter_t;
int i;
int flag=1,count;

FavouriteAdapter(Activity context, ArrayList<String> fav_name, ArrayList<String> fav_number){

    this.context=context;
    this.f_name=fav_name;
    this.f_number=fav_number;
}

@Override
public int getCount() {
    return f_name.size();
}

@Override
public Object getItem(int i) {
    return null;
}

@Override
public long getItemId(int i) {

    return i;
}

@Override
public View getView(final int position, View view, ViewGroup viewGroup) {

    LayoutInflater l=context.getLayoutInflater();
    View row=l.inflate(R.layout.favourite_adapter_layout,null,true);

    /*name1=new String[f_name.size()];
    name2=new String[f_name.size()];
    number1=new String[f_number.size()];
    number2=new String[f_number.size()];*/

    main_letter=(TextView)row.findViewById(R.id.main_letter);
    tf_name=(TextView) row.findViewById(R.id.favName);
    tf_number=(TextView)row.findViewById(R.id.favNumber);
    tf_name_t=(TextView)row.findViewById(R.id.favName_t);
    tf_number_t=(TextView)row.findViewById(R.id.favNumber_t);
    main_letter_t=(TextView)row.findViewById(R.id.main_letter_t);
    count=f_name.size();

    try {
        if(flag==1)
        {
        for (int i=0;i<f_name.size();i++){

            if(i==count) {

                flag=0;
                break;
            }

            if(i%2==0){
                    System.out.println("i in One: "+i);
                tf_name.setText(f_name.get(position));
                tf_number.setText(f_number.get(position));
                if (!f_name.get(position).isEmpty()) {
                    String init = f_name.get(position).substring(0, 1);
                    main_letter.setText(init);
                }

            }
            else{
                System.out.println("i in Two: "+i);
                tf_name_t.setText(f_name.get(position));
                tf_number_t.setText(f_number.get(position));
                if (!f_name.get(position).isEmpty()) {
                    String init = f_name.get(position).substring(0, 1);
                    main_letter_t.setText(init);

            }
        }

    }}}
    catch (Exception e){
        System.out.println(e);
    }
    return row;
 }
}

Answer 1

我用GridView代替ListView来解决我的问题。这是我的代码。希望它能帮到别人。

FragmentFavourites

    public class FragmentFavourites extends Fragment{

ArrayList<String> name = new ArrayList<String>();
ArrayList<String> number = new ArrayList<String>();
GridView f_list;
String starred_id,starred_name,starred_number;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_favourites, container, false);
    f_list=(GridView) rootView.findViewById(R.id.grid);
    name.clear();
    number.clear();
    try
    {
        new GetFavouriteTask().execute();
    }
    catch(Exception e)
    {
        Toast.makeText(getActivity(),"Problem Loading Contacts",Toast.LENGTH_SHORT).show();
        e.printStackTrace();
    }
    return rootView;

}

public class GetFavouriteTask extends AsyncTask<Void,Void,Void>{

    @Override
    protected Void doInBackground(Void... params) {
        getFavourites();
        return null;
    }
    @Override
    protected void onPostExecute(Void result)
    {
        try {
            FavouriteAdapter fa=new FavouriteAdapter(getActivity(),name,number);
            f_list.setAdapter(fa);
        }
        catch(Exception e){
            System.out.println(e);
        }

    }
}

public void getFavourites()
{
    ContentResolver cr = getActivity().getApplicationContext().getContentResolver();
    Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI,
            new String[]{ContactsContract.Contacts._ID,
                    ContactsContract.Contacts.DISPLAY_NAME,
                    ContactsContract.Contacts.HAS_PHONE_NUMBER,
                    ContactsContract.Contacts.STARRED}, ContactsContract.Contacts.STARRED + "='1'", null,ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME + " COLLATE NOCASE ASC");

    while (cur.moveToNext()) {

        starred_id = cur.getString(0);
        starred_name = cur.getString(1);
        name.add(starred_name);
        starred_number=getFavouriteNumber(starred_id);
        number.add(starred_number);

    }
    cur.close();
}

public String getFavouriteNumber(String contactId)
{
    ContentResolver cr = getActivity().getApplicationContext().getContentResolver();
    String phone=null;

    Cursor cursor = cr.query(
            ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
            null,
            ContactsContract.CommonDataKinds.Phone.CONTACT_ID +" = ?",
            new String[]{contactId}, null);

    while (cursor.moveToNext())
    {
        phone=cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
    }

    cursor.close();
    return phone;
}
}

FavouriteAdapter

    public class FavouriteAdapter extends BaseAdapter{

Activity context;
ArrayList<String> f_name,f_number;
TextView tf_name,tf_number,main_letter;
int i;

FavouriteAdapter(Activity context, ArrayList<String> fav_name, ArrayList<String> fav_number){
    this.context=context;
    this.f_name=fav_name;
    this.f_number=fav_number;
}

@Override
public int getCount() {
    return f_name.size();
}

@Override
public Object getItem(int i) {
    return null;
}

@Override
public long getItemId(int i) {

    return i;
}

@Override
public View getView(final int position, View view, ViewGroup viewGroup) {

    LayoutInflater l=context.getLayoutInflater();
    View row=l.inflate(R.layout.favourite_adapter_layout,null,true);


    main_letter=(TextView)row.findViewById(R.id.main_letter);
    tf_name=(TextView) row.findViewById(R.id.favName);
    tf_number=(TextView)row.findViewById(R.id.favNumber);

    try {
                tf_name.setText(f_name.get(position));
                tf_number.setText(f_number.get(position));
                if (!f_name.get(position).isEmpty()) {
                    String init = f_name.get(position).substring(0, 1);
                    main_letter.setText(init);
                }}
    catch (Exception e){
        System.out.println(e);
    }
    return row;
}
 }

fragment_favourites.xml

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<GridView
    android:id="@+id/grid"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:verticalSpacing="0dp"
    android:horizontalSpacing="0dp"
    android:stretchMode="columnWidth"
    android:numColumns="2"/>
   </RelativeLayout>

favourite_adapter_layout

<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    >


    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:cardElevation="6dp"
        app:cardUseCompatPadding="true"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginStart="20dp"
        android:layout_marginEnd="20dp"
        app:cardBackgroundColor="#02605c"
        >

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#ffffff"
                android:textSize="60dp"
                android:layout_gravity="center"
                android:padding="5dp"
                android:id="@+id/main_letter"
                />
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#ffffff"
                android:textSize="15dp"
                android:layout_marginStart="10dp"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp"
                android:layout_marginEnd="10dp"
                android:id="@+id/favName"
                />
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#ffffff"
                android:layout_marginStart="10dp"
                android:layout_marginLeft="10dp"
                android:layout_marginBottom="10dp"
                android:layout_marginRight="10dp"
                android:layout_marginEnd="10dp"
                android:id="@+id/favNumber"
                />
        </LinearLayout>
    </android.support.v7.widget.CardView>
     </LinearLayout>
    </RelativeLayout>