Question

我有一个listView，我需要当用户点击某个项目时显示5个图像，当他点击另一个项目时，它会显示5个不同的图像与ViewPager ..我不知道如何更改图像数组这会随listView的每个项目而改变吗？有什么想法吗？

我的代码：

public class SwipeActivity extends Activity{

    ViewPager vp;
    Table_customSwipeAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_swipe);


        vp=(ViewPager)findViewById(R.id.view_pager);
        adapter=new Table_customSwipeAdapter(this);
        vp.setAdapter(adapter);

    }

    public void imageSwipe(View view){
        Toast toast = Toast.makeText(getApplicationContext(), "Open Link!", Toast.LENGTH_SHORT);
        toast.show();
    }

}


class Table_customSwipeAdapter extends PagerAdapter{

    int[] image_resources={R.drawable.i1,R.drawable.i2,R.drawable.i3,R.drawable.i4,R.drawable.i5};

    private Context ctx;
    private LayoutInflater layoutInflater;


    public Table_customSwipeAdapter(Context ctx) {
        this.ctx=ctx;
    }


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

    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
        // TODO Auto-generated method stub
        return (arg0==(LinearLayout)arg1);
    }


    public Object instantiateItem(ViewGroup container, int position){

        layoutInflater=(LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View item_view=layoutInflater.inflate(R.layout.activity_table_custom_swipe_adapter, container,false);

        ImageView imageView=(ImageView)item_view.findViewById(R.id.image_view);
        TextView textView=(TextView)item_view.findViewById(R.id.image_count);
        imageView.setImageResource(image_resources[position]);
        textView.setText("Image "+(position+1));
        container.addView(item_view);

        return item_view;

    }


    public void destroyItem(ViewGroup container, int position, Object object){
        container.removeView((LinearLayout)object);

    }

}

在这里，ViewPager显示了相同的5张图片..

Answer 1

您可以在ViewPager中定义一个Activity可以实现的回调接口。在instantiateItem，ViewPager可以通过此回调调用Activity中的方法，以获取点击的ListView位置。根据该信息，它可以显示图像。

Answer 2

//In your Table_customSwipeAdapter make these chages in contructor get the  image array  e.g 
class Table_customSwipeAdapter extends PagerAdapter{

int[] image_resources;

private Context ctx;
private LayoutInflater layoutInflater;

public Table_customSwipeAdapter(Context ctx, int[] image_resources) {
    this.ctx=ctx;
    this.image_resources=image_resources
}
// In your SwipeActivity while calling the constructor pass the int array
 adapter=new Table_customSwipeAdapter(this,image_resources);

Answer 3

它显示相同的图像，因为这里

 imageView.setImageResource(image_resources[position]);

您正在设置相同的图像

首先，您需要创建不同的Lists图像，以便在“活动”中的每次不同点击中显示这些图像

public class SwipeActivity extends Activity{

ViewPager vp;
Table_customSwipeAdapter adapter;
int[] image_resources1 ={R.drawable.i1,R.drawable.i2,R.drawable.i3};
int[] image_resources2 ={R.drawable.i4,R.drawable.i5};

然后在你的适配器

class Table_customSwipeAdapter extends PagerAdapter{

int[] image_resources;
private Context ctx;
private LayoutInflater layoutInflater;

public Table_customSwipeAdapter(Context ctx, int[] image_resources) {
    this.ctx=ctx;
    this.image_resources = image_resources;
}

然后在每次点击时将不同的列表传递给您的适配器，如此

vp=(ViewPager)findViewById(R.id.view_pager);

    //HERE YOU WILL PASS WHICHEVER LIST YOU WANT TO DISPLAY e.g image_resources1 or image_resources2 or ANY OTHER
    adapter=new Table_customSwipeAdapter(this,image_resources);
    vp.setAdapter(adapter);

希望有所帮助

如何使用具有多个图像数组的ViewPager？

3 个答案: