Question

我已经制作了MainActivity类，我想在列表视图中设置图标

代码在这里

 public class MainActivity extends ListActivity {

static  String classes[]={"StartingPoint","Example1","Example2","Example3","Example4","Example5","Example6","Example7"};
    static final Integer[] imgid = {R.drawable.ic_launcher,R.drawable.ic_launcher,R.drawable.ic_launcher};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);     
        setListAdapter(new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, classes));
    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        // TODO Auto-generated method stub
        super.onListItemClick(l, v, position, id);
        String  cheese=classes[position];

        try {
            Class myclass=Class.forName("com.example.listmenu."+cheese);
            Intent i=new Intent(MainActivity.this,myclass);
            startActivity(i);
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

我想在列表视图项目中设置图标....请帮我解决这个问题？

Answer 1

制作自定义适配器并传递文本和图像数组

 public class AboutAdapter extends BaseAdapter {
        private LayoutInflater inflater;
        private Context mcontext;
        private Strig[] arrayList;

        public AboutAdapter(Context context, Strig[] arrayList) {
            this.mcontext = context;
            this.arrayList= arrayList;
            inflater = LayoutInflater.from(mcontext);
        }

        @Override
        public int getCount() {
            return arrayList.length;
        }

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

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

        public class Holder {
            TextView txtname;
            ImageView imag;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View vi = convertView;
            Holder holder;
            if (vi == null) {
                vi = inflater.inflate(R.layout.raw_aboutlist, null);
                holder = new Holder();

                holder.txtname = (TextView) vi
                        .findViewById(R.id.raw_about_txt_name);
                holder.imag = (ImageView) vi
                        .findViewById(R.id.raw_about_img);

                vi.setTag(holder);

            } else {
                holder = (Holder) vi.getTag();
            }

 holder.txtname.setText(arrayList[position]);

// same as for image pass array of image and set 

    holder.imag.setBackgroundResource(R.drawable.explr_img_selector);
            return vi;
        }

    }

然后在listview中设置适配器，如下所示

AboutAdapter aboutAdapter = new AboutAdapter(AboutActivity.this, arrayList);
listView.setAdapter(aboutAdapter);

在listView项目中设置图像

1 个答案: