Question

我想为奇数行和偶数行填充具有不同布局的ListView。它应该是这样的：

enter image description here

我使用两个对象“OddListItem”和“EvenListItem”来存储/访问数据。我不知道如何将两个对象传递给我的自定义列表视图适配器并获得正确的视图。

我的对象类：

public class OddListItem {

    private String time_start;
    private String time_end;
    private String location;

    public OddListItem(String time_start, String time_end, String location) {
        super();
        this.time_start = time_start;
        this.time_end = time_end;
        this.location = location;
    }

    // getters and setters
    void setTimeStart(String time_start) {
        this.time_start = time_start;
    }

    void setTimeEnd(String time_end) {
        this.time_end = time_end;
    }

    void setLocation(String location) {
        this.location = location;
    }

    public String getTimeStart() {
        return time_start;
    }

    public String getTimeEnd() {
        return time_end;
    }

    public String getLocation() {
        return location;
    }
}

public class EvenListItem {

    private String image;
    private String location;

    public EvenListItem (String image, String location) {
        super();
        this.image = image;
        this.location = location;
    }

    // getters and setters
    void setImage(String image) {
        this.image = image;
    }

    void setLocation(String location) {
        this.location = location;
    }

    public String getImage() {
        return image;
    }

    public String getLocation() {
        return location;
    }
}

MyCustomAdapter：

public class MyCustomAdapter extends BaseAdapter {

    // Tag for Logging
    private static final String TAG = "MyCustomAdapter";

    int type;
    private static final int TYPE_ITEM = 0;
    private static final int TYPE_SEPARATOR = 1;
    private static final int TYPE_MAX_COUNT = TYPE_SEPARATOR + 1;

    private ArrayList<OddListItem> mData = new ArrayList<OddListItem>();
    private LayoutInflater mInflater;
    //private TreeSet mSeparatorsSet = new TreeSet();

    private Context context;

    public MyCustomAdapter(Context context) {
        mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        this.context = context;
    }

    public void addItem(final OddListItem item) {
        mData.add(item);
        //The notification is not necessary since the items are not added dynamically
        //notifyDataSetChanged();
    }

    public void addSeparatorItem(final OddListItem item) {
        mData.add(item);
        //The notification is not necessary since the items are not added dynamically
        //notifyDataSetChanged();
    }

    @Override
    public int getItemViewType(int position) {
        /*if ((position%2) == 0){
            type = TYPE_ITEM;
        } else {
            type = TYPE_SEPARATOR;
        }
        return type;*/
        return position%2;
    }

    @Override
    public int getViewTypeCount() {
        return TYPE_MAX_COUNT;
    }

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

    @Override
    public OddListItem getItem(int position) {
        return mData.get(position);
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        int type = getItemViewType(position);
        Log.d(TAG, "getView " + position + " " + convertView + " type = " + type);
        if (convertView == null) {
            holder = new ViewHolder();
            switch (type) {
                case TYPE_ITEM:
                    //inflate the new layout
                    convertView = mInflater.inflate(R.layout.detail_list_row_odd, parent, false);
                    holder.tv_time_from = (TextView) convertView.findViewById(R.id.tv_time_from);
                    holder.tv_time_to = (TextView) convertView.findViewById(R.id.tv_time_to);
                    holder.tv_current_location_odd = (TextView) convertView.findViewById(R.id.tv_current_location_odd);
                    //fill the layout with values
                    /*holder.tv_time_from.setText("12:34");
                    holder.tv_time_to.setText("12:37");
                    holder.tv_current_location_odd.setText("Aktueller Standort");*/
                    holder.tv_time_from.setText(mData.get(position).getTimeStart());
                    holder.tv_time_to.setText(mData.get(position).getTimeEnd());
                    holder.tv_current_location_odd.setText(mData.get(position).getLocation());
                    break;
                case TYPE_SEPARATOR:
                    //inflate the new layout
                    convertView = mInflater.inflate(R.layout.detail_list_row_even, parent, false);
                    holder.tv_current_location_even = (TextView) convertView.findViewById(R.id.tv_current_location_even);
                    holder.img_transport = (ImageView) convertView.findViewById(R.id.img_transport);
                    //fill the layout with values
                    holder.tv_current_location_even.setText("Hauptbahnhof");
                    holder.img_transport.setImageDrawable(context.getResources().getDrawable(R.drawable.rollator));
                    break;
                default:
                    break;
            }
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        return convertView;
    }

    private static class ViewHolder {
        public TextView tv_time_from;
        public TextView tv_time_to;
        public TextView tv_current_location_odd;
        public TextView tv_current_location_even;
        public ImageView img_transport;
    }
}

这里我生成数据并调用适配器：

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

    generateData();

    //fill ListView with custom content from MyCustomAdapter class
    mAdapter = new MyCustomAdapter(getApplicationContext());

    for (int i = 1; i < odd_items.size(); i++) {
        mAdapter.addItem(odd_items.get(i));
        if (i % 1 == 0) {
            mAdapter.addSeparatorItem(odd_items.get(i));
        }
    }
    setListAdapter(mAdapter);

    //set duration text
    tv_duration = (TextView)findViewById(R.id.tv_duration);
    tv_duration.setText("Dauer: 22 Minuten");
}

private void generateData() {

    odd_items = new ArrayList<OddListItem>();
    odd_items.add(new OddListItem("12:34", "", "Aktueller Standort"));
    odd_items.add(new OddListItem("12:37", "12:37", "TUM"));
    odd_items.add(new OddListItem("12:42", "12:42", "Hauptbahnhof Nord"));
    odd_items.add(new OddListItem("12:48", "12:48", "Hauptbahnhof"));

    even_items = new ArrayList<EvenListItem>();
    even_items.add(new EvenListItem("R.drawable.rollator", "3 Minuten Fußweg"));
    even_items.add(new EvenListItem("R.drawable.bus", "Richtung Hauptbahnhof Nord"));
    even_items.add(new EvenListItem("R.drawable.rollator", "6 Minuten Fußweg"));

    mData = new Data(odd_items, even_items);
}

任何帮助都会很棒。也许还有更好的方法，请告诉我。

Answer 1

我会创建一个单项目列表

public class Items {


    private String time_start;
    private String time_end;
    private String location;
    private int image;
    private String locationeven;
    private int oddoreven;

    public String getTime_start() {
        return time_start;
    }
    public void setTime_start(String time_start) {
        this.time_start = time_start;
    }
    public String getTime_end() {
        return time_end;
    }
    public void setTime_end(String time_end) {
        this.time_end = time_end;
    }
    public String getLocation() {
        return location;
    }
    public void setLocation(String location) {
        this.location = location;
    }
    public int getImage() {
        return image;
    }
    public void setImage(int image) {
        this.image = image;
    }
    public String getLocationeven() {
        return locationeven;
    }
    public void setLocationeven(String locationeven) {
        this.locationeven = locationeven;
    }
    public int getOddoreven() {
        return oddoreven;
    }
    public void setOddoreven(int oddoreven) {
        this.oddoreven = oddoreven;
    }

}

在onCreate of Activity中调用

 generateData() ;

然后

 ArrayList<Items>  oddorevenlist = new ArrayList<Items>();
 private void generateData() {

           Items item1 = new Items();
           item1.setTime_start("12:34");
           item1.setTime_end("");
           item1.setLocation("Aktueller Standort");
           item1.setOddoreven(0);
           oddorevenlist.add(item1);

           Items item2 = new Items();
           item2.setImage(R.drawable.ic_launcher);
           item2.setLocationeven("3 Minuten Fußweg");
           item2.setOddoreven(1);
           oddorevenlist.add(item2);

           Items item3 = new Items();
           item3.setTime_start("12:37");
           item3.setTime_end("12:37");
           item3.setLocation("Tum");
           item3.setOddoreven(0);
           oddorevenlist.add(item3);

           Items item4 = new Items();
           item4.setImage(R.drawable.ic_launcher);
           item4.setLocationeven("Richtung Hauptbahnhof Nord");
           item4.setOddoreven(1);
           oddorevenlist.add(item4);

           Items item5 = new Items();
           item5.setTime_start("12:42");
           item5.setTime_end("12:42");
           item5.setLocation("Hauptbahnhof Nord");
           item5.setOddoreven(0);
           oddorevenlist.add(item5);

           Items item6 = new Items();
           item6.setImage(R.drawable.ic_launcher);
           item6.setLocationeven("R6 Minuten Fußweg");
           item6.setOddoreven(1);
           oddorevenlist.add(item6);

           Items item7 = new Items();
           item7.setTime_start("12:48");
           item7.setTime_end("12:48");
           item7.setLocation("HHauptbahnhof");
           item7.setOddoreven(0);
           oddorevenlist.add(item7);

           MyCustomAdapter mAdapter = new MyCustomAdapter(this,oddorevenlist);
           setListAdapter(mAdapter);

       }

适配器代码

public class MyCustomAdapter extends BaseAdapter {

    // Tag for Logging
    private static final String TAG = "MyCustomAdapter";

    int type;
    private static final int TYPE_ITEM = 0;
    private static final int TYPE_SEPARATOR = 1;



    private ArrayList<Items>  oddorevenlist ;
    private LayoutInflater mInflater;


    private Context context;

    public MyCustomAdapter(Context context, ArrayList<Items> oddorevenlist) {
        mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        this.context = context;

        this.oddorevenlist = oddorevenlist;
    }


    @Override
    public int getItemViewType(int position) {
        if (oddorevenlist.get(position).getOddoreven()==0){
            type = TYPE_ITEM;
        } else if (oddorevenlist.get(position).getOddoreven()==1) {
            type = TYPE_SEPARATOR;
        }
        return type;

    }

    @Override
    public int getViewTypeCount() {
        return 2;
    }

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


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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        int type = getItemViewType(position);
        Log.d(TAG, "getView " + position + " " + convertView + " type = " + type);
        if (convertView == null) {
            holder = new ViewHolder();
            switch (type) {
                case TYPE_ITEM:
                    //inflate the new layout
                    convertView = mInflater.inflate(R.layout.row_odd, parent, false);
                    holder.tv_time_from = (TextView) convertView.findViewById(R.id.tv_time_from);
                    holder.tv_time_to = (TextView) convertView.findViewById(R.id.tv_time_to);
                    holder.tv_current_location_odd = (TextView) convertView.findViewById(R.id.tv_current_location_odd);

                    holder.tv_time_from.setText(oddorevenlist.get(position).getTime_start());
                    holder.tv_time_to.setText(oddorevenlist.get(position).getTime_end());
                    holder.tv_current_location_odd.setText(oddorevenlist.get(position).getLocation());
                    break;
                case TYPE_SEPARATOR:
                    //inflate the new layout
                    convertView = mInflater.inflate(R.layout.row_even, parent, false);
                    holder.tv_current_location_even = (TextView) convertView.findViewById(R.id.tv_current_location_even);
                    holder.img_transport = (ImageView) convertView.findViewById(R.id.img_transport);
                    //fill the layout with values
                    holder.tv_current_location_even.setText(oddorevenlist.get(position).getLocationeven());
                    holder.img_transport.setImageResource(R.drawable.ic_launcher);
                    break;
                default:
                    break;
            }
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        return convertView;
    }

    private static class ViewHolder {
        public TextView tv_time_from;
        public TextView tv_time_to;
        public TextView tv_current_location_odd;
        public TextView tv_current_location_even;
        public ImageView img_transport;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }


}

对齐

enter image description here

ListView具有不同的布局和两个不同的对象

1 个答案: