从customadapter listview Android获取所选项目

Question

what I've been doing is about customadapter. Now I want to get the selected item from my listview, but it's adapter is custom. In my listview, I have an image, title and a caption, I want to get the selected item, in my case just the title. How do I do that?

Here's what I've tried so far:

    @Override
public void onItemClick(AdapterView<?> parent, View v, int pos, long id) {
    String strHouseName = "house_name";
    String strHousePrice = "house_price";
    //String selectedFromList =(String) (lv.getItemAtPosition(pos));
    Intent i;

    switch(pos){
    case 0:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "5 Dina Retreat, Carrum Downs");
        i.putExtra(strHousePrice, "$300,000.00");
        startActivity(i);
        break;
    case 1:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 941 Cob Terrace, Clyde North");
        i.putExtra(strHousePrice, "$800,000.00");
        startActivity(i);
        break;
    case 2:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 932 Ventasso Street, Clyde");
        i.putExtra(strHousePrice, "$1,000,000.00");
        startActivity(i);
        break;
    case 3:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 515 Summerhill Blvd, Drouin");
        i.putExtra(strHousePrice, "$300,000.00");
        startActivity(i);
        break;
    case 4:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 17 Todman Street, Drouin (Option 2)"); 
        i.putExtra(strHousePrice, "$550,000.00");
        startActivity(i);
        break;
    case 5:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 32 Aqueduct Road, Langwarrin");
        i.putExtra(strHousePrice, "$600,000.00");
        startActivity(i);
        break;
    case 6:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Units 2-7, 269 North Road, Langwarin");
        i.putExtra(strHousePrice, "$450,000.00");
        startActivity(i);
        break;
    case 7:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "U 39, 40-60 Potts Road, Langwarrin");
        i.putExtra(strHousePrice, "$1,300,000.00");
        startActivity(i);
        break;
    case 8:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 1 McClenaghan Place, Pakenham");
        i.putExtra(strHousePrice, "$2,000,000.00");
        startActivity(i);
        break;
    case 9:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 2 McClenaghan Place, Pakenham");
        i.putExtra(strHousePrice, "$300,000.00");
        startActivity(i);
        break;
    case 10:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 3 McClenaghan Place, Pakenham");
        i.putExtra(strHousePrice, "$900,000.00");
        startActivity(i);
        break;
    case 11:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 4 McClenaghan Place, Pakenham");
        i.putExtra(strHousePrice, "$600,000.00");
        startActivity(i);
        break;
    case 12:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 5 McClenaghan Place, Pakenham");
        i.putExtra(strHousePrice, "$1,200,000.00");
        startActivity(i);
        break;
    case 13:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 7 McClenaghan Place, Pakenham");
        i.putExtra(strHousePrice, "$700,000.00");
        startActivity(i);
        break;
    case 14:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 11 McClenaghan Place, Pakenham");
        i.putExtra(strHousePrice, "$500,000.00");
        startActivity(i);
        break;
    case 15:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 12 McClenaghan Place, Pakenham");
        i.putExtra(strHousePrice, "$3,000,000.00");
        startActivity(i);
        break;
    case 16:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 532 Summerhill Blvd, Drouin");
        i.putExtra(strHousePrice, "$300,000.00");
        startActivity(i);
        break;
    case 17:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 17 Ajax Street, Drouin");
        i.putExtra(strHousePrice, "$300,000.00");
        startActivity(i);
        break;
    case 18:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 133 Mountainview Blvd, Cranbourne North");
        i.putExtra(strHousePrice, "$300,000.00");
        startActivity(i);
        break;
    case 19:
        i = new Intent(this, ViewHouse.class);
        i.putExtra(strHouseName, "Lot 531 Summerhill Blvd, Drouin");
        i.putExtra(strHousePrice, "$300,000.00");
        startActivity(i);
        break;
    default: Log.d(strHouseName, "No such house name available");
    } 

}


    class MyCustomAdapter extends BaseAdapter
{
    String[] data_text1;
    String[] data_text2;
    int[] data_image;

MyCustomAdapter() {
    data_text1 = null;
    data_text2 = null;
    data_image = null;
}

MyCustomAdapter(int[] image, String[] house, String[] price) {
    data_text1 = house;
    data_text2 = price;
    data_image = image;
}

public int getCount() {
    return data_text1.length;
}

public String getItem(int position) {
    return null;
}

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

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

    LayoutInflater inflater = getLayoutInflater();
    View row;

    row = inflater.inflate(R.layout.listrow, null);

    TextView textview1 = (TextView) row.findViewById(R.id.text1);
    TextView textview2 = (TextView) row.findViewById(R.id.text2);
    ImageView imageview = (ImageView) row.findViewById(R.id.image);

    imageview.setScaleType(ImageView.ScaleType.FIT_XY);
    textview1.setText(data_text1[position]);
    textview2.setText("$" + (new DecimalFormat("#,###.00")).format(Double.parseDouble(data_text2[position])) );
    imageview.setImageResource(data_image[position]);

    return (row);

    }
}

For the mean time, I just get via its position, but the issue is, what if the list is sorted? How can get the correct selected item? Any ideas? I'd gladly appreciate it. Thanks.

Answer 1

Try this..

@Override
public void onItemClick(AdapterView<?> parent, View v, int pos, long id) {

    TextView textview1 = (TextView) v.findViewById(R.id.text1);
    TextView textview2 = (TextView) v.findViewById(R.id.text2);

    Log.v("textview1",textview1.getText().toString().trim());
    Log.v("textview2",textview2.getText().toString().trim());

}

Answer 2

On item click get the current view, get it's ui elements ex TextView title, and send them to intent

@Override
public void onItemClick(AdapterView<?> parent, View v, int pos, long id)
{
    if (v== null)
        v= inflater.inflate(R.layout.list_row_layout, null); // reached in case of listview bug in android which is a little chance but to make sure not to crash on NPE    
    String title = ((TextView) v.findViewById(R.id.list_row_title)).getText();
    String price = ((TextView) v.findViewById(R.id.list_row_price)).getText();

    i = new Intent(this, ViewHouse.class);
    i.putExtra(strHouseName, title );
    i.putExtra(strHousePrice, price );
    startActivity(i);
}

Answer 3

Sure for an example

//DatasetClass

public class HouseData{

    //private String HouseName= "";
    private String HousePrice = "";

    /*public String getHouseName() {
        return HouseName;
    }
    public void setHouseName(String HouseName) {
        this.HouseName= HouseName;
    }*/
    public String getHousePrice () {
        return HousePrice ;
    }
    public void setHousePrice (String HousePrice ) {
        this.HousePrice = HousePrice ;
    }

//viewholder class is as:-

 public class ViewHolder
        {
            public TextView tv_HousePrice,tv_HouseName

        }

//and here is the getview method here.

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

            final ViewHolder holder;
            //holder=new ViewHolder();

            View listrow = convertView;

            activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

            if (listrow == null) {

                LayoutInflater vi = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                listrow = vi.inflate(R.layout.your_listview_item_layout, null);

                holder=new ViewHolder();
                holder.tv_HouseName=(TextView)listrow.findViewById(R.id.tv_name);


                holder.tv_HousePrice=(EditText)listrow.findViewById(R.id.tv_price);
                listrow.setTag(holder);

            }
            else
                holder=(ViewHolder)listrow.getTag();
            listrow.setBackgroundColor(((position % 2)!=0) ? Color.rgb(229,229,229) : Color.WHITE);

            try {
                houseData= getItem(position);



                if (houseData!= null) { 

                    holder.tv_HouseName.setText(""+houseData.getHouseName());
                    holder.tv_HousePrice.setText(""+houseData.getHousePrice());

                }
            } catch (Exception e) {
                // TODO: handle exception
                e.printStackTrace();
            }

            listrow.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
//here you can pass complete data object to next activity
}
            });


            return listrow;
        }

Answer 4

Try to get view. Parse it to your textview by id. Get the text and continue

Answer 5

Try this..

public void onItemClick(AdapterView<?> parent, View v, int pos, long id) {
    // Type cast to what the layout you used in the xml i.e, for the list item
    // For example i took the RelativeLayout
    if(v instanceOf RelativeLayout){
        RelativeLayout layout = (RelativeLayout) v;
        TextView title = (TextView) layout.findViewById(R.id.conFormat_Name);
        System.out.println(title.getText());
    } 

}

Answer 6

You can create a member to hold selected index in your custom adapter like...

private int selectedIndex;

Then initialize it to selectedIndex = -1 in constructor of custom adapter and its getter and setters...

public void setSelectedIndex(int index) {
    this.selectedIndex = index;
}

public int getSelectedIndex() {
    return selectedIndex;
}

And finally, you just need to pass position parameter of you adapter onItemClick in the setter and get selected item anywhere you want using getter.

And once you maintain the selectedIndex, you can easily get selected item like..

public BookInfo getSelectedItem() {
    if (selectedIndex <= -1 || selectedIndex >= items.size()) {
        return null;
    } else {
        return items.get(selectedIndex);
    }
}

hope this helps...:)