在android中更改所选列表视图项图像问题

概述在我的应用程序中,我只使用列表视图来显示图像和文本.这是我的适配器编码ArrayAdapter<String>adapter=newArrayAdapter<String>(MainActivity.this,R.layout.list_item,R.id.name,arrList);listProductCategories.setAdapter(adapter);listProductCategories.s

在我的应用程序中,我只使用列表视图来显示图像和文本.这是我的适配器编码

ArrayAdapter<String> adapter=new ArrayAdapter<String>(MainActivity.this, R.layout.List_item, R.ID.name, arrList);    ListProductCategorIEs.setAdapter(adapter);    ListProductCategorIEs.setonItemClickListener(new OnItemClickListener() {        @OverrIDe        public voID onItemClick(AdapterVIEw<?> parent, VIEw vIEw,                int position, long ID) {              ImageVIEw imgvIEw = (ImageVIEw) vIEw.findVIEwByID(R.ID.iv_Listitem);                 //And change its background here                 imgvIEw.setBackgroundResource(R.drawable.fail);            String name = ((TextVIEw) vIEw.findVIEwByID(R.ID.name))                    .getText().toString();            Toast.makeText(MainActivity.this, "" + name, 10).show();        }    });

这是上面编码的屏幕截图.

这里我突出显示所选列表项.但是我的输出显示了许多列表视图项目图像背景中的一些已更改..

请给我一个解决方案….

<ImageVIEw androID:ID="@+ID/iv_Listitem" androID:layout_wIDth="20dp" androID:layout_height="20dp" androID:layout_gravity="center_vertical" androID:background="@drawable/next_unselect"androID:focusable="false" /> <TextVIEwandroID:ID="@+ID/name" androID:layout_wIDth="match_parent"   androID:layout_height="wrap_content" androID:layout_gravity="center_vertical"androID:focusable="false" androID:text="TextVIEw"androID:textcolor="#003366" /> 

项目清单-

  <ImageVIEw androID:ID="@+ID/iv_Listitem" androID:layout_wIDth="20dp" androID:layout_height="20dp" androID:layout_gravity="center_vertical" androID:background="@drawable/next_unselect" androID:focusable="false" />  <TextVIEw androID:ID="@+ID/name" androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:layout_gravity="center_vertical" androID:focusable="false" androID:text="TextVIEw" androID:textcolor="#003366" />

解决方法:

我使用了自定义适配器的Custom ListVIEw和带有getter和setter的ItemsHolder类.

改变

>获取项目的位置.
>更改位置的项目.
>适配器上的CallnotifyDataSetChanged()以刷新ListvIEw.

例：

ItemsHolder ih = hold.get(position);ih.setimage(decodeImage(R.drawable.appicon));ih.setname("Changed");cus.notifyDataSetChanged();

的test.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"tools:context=".MenuActivity" ><ListVIEw    androID:ID="@+ID/ListVIEw_Menu"    androID:layout_wIDth="match_parent"    androID:layout_height="wrap_content"    ></ListVIEw></relativeLayout>

List_item.xml

<?xml version="1.0" enCoding="utf-8"?><relativeLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"androID:layout_wIDth="match_parent"androID:layout_height="match_parent" ><ImageVIEw    androID:ID="@+ID/imageVIEw_List_Item"    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content"    androID:layout_centerHorizontal="true"    androID:contentDescription="@string/app_name"    androID:src="@drawable/ic_launcher" /><TextVIEw    androID:ID="@+ID/textVIEw1"    androID:layout_wIDth="wrap_content"    androID:layout_height="wrap_content"    androID:layout_below="@+ID/imageVIEw_List_Item"    androID:layout_centerHorizontal="true"    androID:layout_margintop="28dp"    androID:text="TextVIEw" /></relativeLayout>

MainActivity.java

public class MainActivity extends Activity {ArrayList<ItemsHolder> hold= new ArrayList<ItemsHolder>();CustomAdapter cus;@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.test);    Bitmap[] images = {decodeImage(R.drawable.ic_launcher),decodeImage(R.drawable.ic_launcher)};    ListVIEw List = (ListVIEw)findVIEwByID(R.ID.ListVIEw_Menu);    hold.add(new ItemsHolder(images[0],"image1"));    hold.add(new ItemsHolder(images[1],"image2"));     cus = new CustomAdapter(hold);     List.setAdapter(cus);     List.setonItemClickListener(new OnItemClickListener()     {         public voID onItemClick(AdapterVIEw<?> parent, VIEw                 vIEw, int position, long ID)         {                ItemsHolder ih = hold.get(position);                ih.setimage(decodeImage(R.drawable.appicon));                ih.setname("Changed");                cus.notifyDataSetChanged();         }     });}private Bitmap decodeImage(int res) {    Bitmap bitmap = BitmapFactory.decodeResource(getResources(),res);                   return bitmap;      }class ItemsHolder{    Bitmap image;    String name;    public ItemsHolder(Bitmap bitmap, String string) {        // Todo auto-generated constructor stub        image = bitmap;        name =string;    }    public Bitmap getimage() {        return image;    }    public voID setimage(Bitmap image) {        this.image = image;    }    public String getname() {        return name;    }    public voID setname(String name) {        this.name = name;    }}class CustomAdapter extends BaseAdapter{    LayoutInflater inflater;    ArrayList<ItemsHolder> List;    public CustomAdapter(ArrayList<ItemsHolder> List)    {        this.List=List;        inflater= LayoutInflater.from(MainActivity.this);    }    @OverrIDe    public int getCount() {        // Todo auto-generated method stub        return List.size();    }    @OverrIDe    public Object getItem(int arg0) {        // Todo auto-generated method stub        return arg0;    }    @OverrIDe    public long getItemID(int position) {        // Todo auto-generated method stub        return 0;    }    @OverrIDe    public VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) {        // Todo auto-generated method stub        VIEwHolder holder;        if(convertVIEw==null)        {            holder = new VIEwHolder();            convertVIEw = inflater.inflate(R.layout.List_item, null);            holder.iv= (ImageVIEw) convertVIEw.findVIEwByID(R.ID.imageVIEw_List_Item);            holder.tv = (TextVIEw) convertVIEw.findVIEwByID(R.ID.textVIEw1);            convertVIEw.setTag(holder);        }        else {            holder = (VIEwHolder)convertVIEw.getTag();        }        ItemsHolder ih = List.get(position);        holder.iv.setimageBitmap(ih.getimage());        holder.tv.setText(ih.getname());        return convertVIEw;    }}class VIEwHolder{    ImageVIEw iv;    TextVIEw tv;}}

捕捉

编辑：

在评论中提出您的问题

Listbkg.xml

<?xml version="1.0" enCoding="utf-8"?><selector xmlns:androID="http://schemas.androID.com/apk/res/androID">    <item androID:state_pressed="true"         androID:drawable="@drawable/appicon" />    <item  androID:state_focused="false"         androID:drawable="@drawable/ic_launcher" /></selector>

然后是xml中的ImageVIEw

androID:background="@drawable/Listbkg" 

总结

以上是内存溢出为你收集整理的在android中更改所选列表视图项图像问题全部内容，希望文章能够帮你解决在android中更改所选列表视图项图像问题所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。