Question

我有一个包含以下布局的列表：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/outName"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingTop="6dip"
        android:paddingLeft="6dip"
        android:textSize="17sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/outSurname"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingTop="6dip"
        android:paddingLeft="6dip"
        android:textSize="17sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/outAddress"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingTop="6dip"
        android:paddingLeft="6dip"
        android:textSize="17sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/outPhone"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingTop="6dip"
        android:paddingLeft="6dip"
        android:textSize="17sp"
        android:textStyle="bold" />

        <ImageView
        android:id="@+id/outPhoto"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

我使用异步任务从JSON格式的BD中检索我的字段，并在onPostExecute函数中填充列表，如下所示：

// Updating UI from Background Thread
            runOnUiThread(new Runnable() {
                public void run() {

                     // Updating parsed JSON data into ListView
                    ListAdapter adapter = new SimpleAdapter(
                            MyActivity.this, MyList,
                            R.layout.my_layout, new String[] { “name”, “surname”, “address”, "phone" },
                            new int[] { R.id.outName, R.id.outSurname, R.id.outAddress, R.id.outPhone });
                    // Updating ListView
                    setListAdapter(adapter);
                }
            });

        }

    }

其中MyList是一个ArrayList：

ArrayList<HashMap<String, String>> MyList;
MyList = new ArrayList<HashMap<String, String>>();

我的结果的每个字段JSONArray由“姓名”，“姓氏”，“地址”，＆＃34;电话＆＃34;和＆＃34;照片＆＃34;组成。＆＃34;相片＆＃34;是一个具有4个可能值（0,1,2,3）的数字字段，其中每个值都指我在可绘制文件夹上的特定图像。如何根据此值设置ImageView的图像？

Answer 1

您需要编写适配器。根据这个做出自己的想法。

 public class ListAdapter extends BaseAdapter{

        Context context;
        ArrayList<HashMap<String, String>> myList;

        public BankAdapter(Context context,ArrayList<HashMap<String, String>> myList){
            this.context = context;
    this.myList=myList;
        }

        static class ViewHolder {
    // Include Number of reqd views.
             private TextView item;
             private ImageView pic;


            }

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

        @Override
        public Object getItem(int pos) {
            // TODO Auto-generated method stub
            return items[pos];
        }

        @Override
        public long getItemId(int pos) {
            // TODO Auto-generated method stub
            String id = items[pos].getId();
            return Long.parseLong(id);
        }


        @Override
        public View getView(int position, View view, ViewGroup parent) {
            // TODO Auto-generated method stub
            ViewHolder mViewHolder = null;
            if(view == null){
                mViewHolder = new ViewHolder();
                LayoutInflater inflater = (LayoutInflater)context.getSystemService
                        (Activity.LAYOUT_INFLATER_SERVICE);
                view = inflater.inflate(R.layout.listrow,parent,false);
                mViewHolder.item = (TextView)view.findViewById(R.id.items_txt);
                mViewHolder.pic=(ImageView)view.findViewById(R.id.pics_img)
                view.setTag(mViewHolder);
            }

            else{
                mViewHolder = (ViewHolder)view.getTag();
            }


            mViewHolder.item.setText(myList.get(position).getKey());
    if(condition){
    //update Image with correct item.
        mViewHolder.pic.setDrawable(//getitemfromList);
    }
            return view;
        }

    }

Android在列表中动态设置ImageView

1 个答案: