baseadapterを使用してリストビューをカスタマイズする方法

Question

次のようなカスタマイズされたListViewを作成します。

BaseAdapterを使用する必要があると思いますが、それについてはわかりません。

Answer 1

main.xml：

<RelativeLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
    xmlns:tools="http://schemas.Android.com/tools"
    Android:layout_width="match_parent"
    Android:layout_height="match_parent"
    Android:paddingBottom="@dimen/activity_vertical_margin"
    Android:paddingLeft="@dimen/activity_horizontal_margin"
    Android:paddingRight="@dimen/activity_horizontal_margin"
    Android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <ListView
        Android:id="@+id/list"
        Android:layout_width="match_parent"
        Android:layout_height="wrap_content"
        Android:layout_alignParentLeft="true"
        Android:layout_alignParentTop="true" >

    </ListView>

</RelativeLayout>

custom.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
    Android:layout_width="match_parent"
    Android:layout_height="match_parent"
    Android:orientation="vertical" >

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

        <LinearLayout
            Android:layout_width="255dp"
            Android:layout_height="wrap_content"
            Android:orientation="vertical" >

            <LinearLayout
                Android:layout_width="match_parent"
                Android:layout_height="wrap_content"
                Android:orientation="vertical" >

                <TextView
                    Android:id="@+id/title"
                    Android:layout_width="wrap_content"
                    Android:layout_height="wrap_content"
                    Android:text="Video1"
                    Android:textAppearance="?android:attr/textAppearanceLarge"
                    Android:textColor="#339966"
                    Android:textStyle="bold" />
            </LinearLayout>

            <LinearLayout
                Android:layout_width="match_parent"
                Android:layout_height="wrap_content"
                Android:orientation="vertical" >

                <TextView
                    Android:id="@+id/detail"
                    Android:layout_width="wrap_content"
                    Android:layout_height="wrap_content"
                    Android:text="video1"
                    Android:textColor="#606060" />
            </LinearLayout>
        </LinearLayout>

        <ImageView
            Android:id="@+id/img"
            Android:layout_width="wrap_content"
            Android:layout_height="wrap_content"
            Android:src="@drawable/ic_launcher" />

    </LinearLayout>

</LinearLayout>

main.Java：

package com.example.sample;

import Android.app.Activity;
import Android.os.Bundle;
import Android.view.LayoutInflater;
import Android.view.View;
import Android.view.ViewGroup;
import Android.widget.BaseAdapter;
import Android.widget.ImageView;
import Android.widget.ListView;
import Android.widget.TextView;


public class MainActivity extends Activity {

    ListView l1;
    String[] t1={"video1","video2"};
    String[] d1={"lesson1","lesson2"};
    int[] i1 ={R.drawable.ic_launcher,R.drawable.ic_launcher};


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        l1=(ListView)findViewById(R.id.list);
        l1.setAdapter(new dataListAdapter(t1,d1,i1));
    }

    class dataListAdapter extends BaseAdapter {
        String[] Title, Detail;
        int[] imge;

        dataListAdapter() {
            Title = null;
            Detail = null;
            imge=null;
        }

        public dataListAdapter(String[] text, String[] text1,int[] text3) {
            Title = text;
            Detail = text1;
            imge = text3;

        }

        public int getCount() {
            // TODO Auto-generated method stub
            return Title.length;
        }

        public Object getItem(int arg0) {
            // TODO Auto-generated method stub
            return null;
        }

        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return position;
        }

        public View getView(int position, View convertView, ViewGroup parent) {

            LayoutInflater inflater = getLayoutInflater();
            View row;
            row = inflater.inflate(R.layout.custom, parent, false);
            TextView title, detail;
            ImageView i1;
            title = (TextView) row.findViewById(R.id.title);
            detail = (TextView) row.findViewById(R.id.detail);
            i1=(ImageView)row.findViewById(R.id.img);
            title.setText(Title[position]);
            detail.setText(Detail[position]);
            i1.setImageResource(imge[position]);

            return (row);
        }
    }
}

これを試して。

Answer 2

public class ListElementAdapter extends BaseAdapter{

    String[] data;
    Context context;
    LayoutInflater layoutInflater;


    public ListElementAdapter(String[] data, Context context) {
        super();
        this.data = data;
        this.context = context;
        layoutInflater = LayoutInflater.from(context);
    }

    @Override
    public int getCount() {

        return data.length;
    }

    @Override
    public Object getItem(int position) {

        return null;
    }

    @Override
    public long getItemId(int position) {

        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {


        convertView= layoutInflater.inflate(R.layout.item, null);

        TextView txt=(TextView)convertView.findViewById(R.id.text);

        txt.setText(data[position]);



        return convertView;
    }
}

Main ActivityでListElementAdapterを呼び出して、AdapterをListViewに設定するだけです。

Answer 3

独自のBaseAdapterクラスを作成し、次のように使用します。

 public class NotificationScreen extends Activity
{

@Override
protected void onCreate_Impl(Bundle savedInstanceState)
{
    setContentView(R.layout.notification_screen);

    ListView notificationList = (ListView) findViewById(R.id.notification_list);
    NotiFicationListAdapter notiFicationListAdapter = new NotiFicationListAdapter();
    notificationList.setAdapter(notiFicationListAdapter);

    homeButton = (Button) findViewById(R.id.home_button);

}

}

独自のBaseAdapterクラスとその別個のxmlファイルを作成します。

public class NotiFicationListAdapter  extends BaseAdapter
{
private ArrayList<HashMap<String, String>> data;
private LayoutInflater inflater=null;


public NotiFicationListAdapter(ArrayList data)
{
this.data=data;        
    inflater =(LayoutInflater)baseActivity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}



public int getCount() 
{
 return data.size();
}



public Object getItem(int position) 
{
 return position;
}



public long getItemId(int position) 
{
    return position;
}



public View getView(int position, View convertView, ViewGroup parent) 
{
View vi=convertView;
    if(convertView==null)

    vi = inflater.inflate(R.layout.notification_list_item, null);

    ImageView compleatImageView=(ImageView)vi.findViewById(R.id.complet_image);
    TextView name = (TextView)vi.findViewById(R.id.game_name); // name
    TextView email_id = (TextView)vi.findViewById(R.id.e_mail_id); // email ID
    TextView notification_message = (TextView)vi.findViewById(R.id.notification_message); // notification message



    compleatImageView.setBackgroundResource(R.id.address_book);
    name.setText(data.getIndex(position));
    email_id.setText(data.getIndex(position));
    notification_message.setTextdata.getIndex(position));

    return vi;
}

  }

BaseAdapter xmlファイル。

<RelativeLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
Android:id="@+id/inner_layout"
Android:layout_width="fill_parent"
Android:layout_height="wrap_content"
Android:layout_marginBottom="5dp"
Android:layout_marginLeft="10dp"
Android:layout_weight="4"
Android:background="@drawable/list_view_frame"
Android:gravity="center_vertical"
Android:padding="5dp" >

<TextView
    Android:id="@+id/game_name"
    Android:layout_width="wrap_content"
    Android:layout_height="wrap_content"
    Android:text="Game name"
    Android:textColor="#FFFFFF"
    Android:textSize="15dip"
    Android:textStyle="bold"
    Android:typeface="sans" />

<TextView
    Android:id="@+id/e_mail_id"
    Android:layout_width="wrap_content"
    Android:layout_height="wrap_content"
    Android:layout_below="@id/game_name"
    Android:layout_marginTop="1dip"
    Android:text="E-Mail Id"
    Android:textColor="#FFFFFF"
    Android:textSize="10dip" />

<TextView
    Android:id="@+id/notification_message"
    Android:layout_width="wrap_content"
    Android:layout_height="wrap_content"
    Android:layout_below="@id/game_name"
    Android:layout_toRightOf="@id/e_mail_id"
    Android:paddingLeft="5dp"
    Android:text="Notification message"
    Android:textColor="#FFFFFF"
    Android:textSize="10dip" />



<ImageView
    Android:id="@+id/complet_image"
    Android:layout_width="wrap_content"
    Android:layout_height="wrap_content"
    Android:layout_alignParentRight="true"
    Android:layout_centerVertical="true"
    Android:layout_marginBottom="30dp"
    Android:layout_marginRight="10dp"
    Android:src="@drawable/complete_tag"
    Android:visibility="invisible" />

</RelativeLayout>

それに応じて変更して使用します。

Answer 4

カスタムアダプターを使用することをお勧めします。まず、layout/customlistview.xmlなどのXmlファイルを作成します

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:Android="http://schemas.Android.com/apk/res/Android" Android:layout_width="fill_parent" Android:layout_height="wrap_content" >
    <ImageView
        Android:id="@+id/image"
        Android:layout_alignParentRight="true"
        Android:paddingRight="4dp" />
    <TextView
        Android:id="@+id/title"
        Android:layout_toLeftOf="@id/image"
        Android:layout_width="wrap_content"
        Android:layout_height="wrap_content"
        Android:textSize="23sp"
        Android:maxLines="1" />
    <TextView
        Android:id="@+id/subtitle"
        Android:layout_toLeftOf="@id/image" Android:layout_below="@id/title"
        Android:layout_width="wrap_content"
        Android:layout_height="wrap_content" /> 
</RelativeLayout>

このようなカスタムクラスがあると仮定します

public class CustomClass {

    private long id;
    private String title, subtitle, picture;

    public CustomClass () {
    }

    public CustomClass (long id, String title, String subtitle, String picture) {
        this.id = id;
        this.title= title;
        this.subtitle= subtitle;
        this.picture= picture;
    }
    //add getters and setters
}

そして、CustomAdapter.Javaはxml-layoutを使用します

public class CustomAdapter extends ArrayAdapter {

private Context context;
private int resource;
private LayoutInflater inflater;

public CustomAdapter (Context context, List<CustomClass> values) { // or String[][] or whatever

    super(context, R.layout.customlistviewitem, values);

    this.context = context;
    this.resource = R.layout.customlistview;
    this.inflater = LayoutInflater.from(context);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    convertView = (RelativeLayout) inflater.inflate(resource, null);

    CustomClass item = (CustomClass) getItem(position);

    TextView textviewTitle = (TextView) convertView.findViewById(R.id.title);
    TextView textviewSubtitle = (TextView) convertView.findViewById(R.id.subtitle);
    ImageView imageview = (ImageView) convertView.findViewById(R.id.image);

    //fill the textviews and imageview with the values
    textviewTitle = item.getTtile();
    textviewSubtitle = item.getSubtitle();

    if (item.getAfbeelding() != null) {
        int imageResource = context.getResources().getIdentifier("drawable/" + item.getImage(), null, context.getPackageName());
        Drawable image = context.getResources().getDrawable(imageResource);
    }
    imageview.setImageDrawable(image);

    return convertView;
    }
}

なんとかできましたか？何かについてもっと情報が必要な場合はお気軽にお尋ねください:)

EDIT：単なるリストではなくリストに合うようにアダプターを変更しました

Answer 5

private class ObjectAdapter extends BaseAdapter {

    private Context context;
    private List<Object>objects;

    public ObjectAdapter(Context context, List<Object> objects) {
        this.context = context;
        this.objects = objects;
    }

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

    @Override
    public Object getItem(int position) {
        return objects.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;

        if(convertView==null){
            holder = new ViewHolder();
            convertView = LayoutInflater.from(context).inflate(Android.R.layout.simple_list_item_1, parent, false);
            holder.text = (TextView) convertView.findViewById(Android.R.id.text1);
            convertView.setTag(holder);
        }else{
            holder = (ViewHolder) convertView.getTag();
        }

        holder.text.setText(getItem(position).toString()));
        return convertView;
    }

    class ViewHolder {
        TextView text;
    }
}