如何在viewpager中编写按钮onClick方法?

时间:2012-01-02 08:29:02

标签: android onclick android-viewpager

我想使用viewpager在按钮点击时烘烤消息,我还想了解有关如何在viewpager中访问视图的更多信息。

我尝试过以下代码....无法正常工作

public class MyPagerAdapter extends PagerAdapter {

    @Override
    public int getCount() {
        return 3;
    }

    @Override
    public Object instantiateItem(final View collection, final int position) {
         v = new View(collection.getContext());
        LayoutInflater inflater =
                (LayoutInflater) collection.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        int resId = 0;
        switch (position) {
        case 0:
            resId = R.layout.cate1;
            v = inflater.inflate(R.layout.cate1, null, false);
            add1 = (Button) v.findViewById(R.id.btnAdd);
            add1.setOnClickListener( new OnClickListener() {
                public void onClick(View m) {
                   Toast.makeText(collection.getContext(),"click",Toast.LENGTH_LONG).show();
                }
            });


            break;
        case 1:
            resId = R.layout.cate2;
            break;
        case 2:
            resId = R.layout.cate3;
            break;
        }

        View view = inflater.inflate(resId, null);
        ((ViewPager) collection).addView(view, 0);

        return view;
    }

    @Override
    public void destroyItem(final View arg0, final int arg1, final Object arg2) {
        ((ViewPager) arg0).removeView((View) arg2);

    }

    @Override
    public boolean isViewFromObject(final View arg0, final Object arg1) {
        return arg0 == ((View) arg1);

    }

    @Override
    public void finishUpdate(View arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void restoreState(Parcelable arg0, ClassLoader arg1) {
        // TODO Auto-generated method stub

    }

    @Override
    public Parcelable saveState() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void startUpdate(View arg0) {
        // TODO Auto-generated method stub

    }

    }

我已经为按钮onclick编写了以下代码....无法正常工作..

      v = inflater.inflate(R.layout.cate1, null, false);
            add1 = (Button) v.findViewById(R.id.btnAdd);
            add1.setOnClickListener( new OnClickListener() {
                public void onClick(View m) {
                   Toast.makeText(collection.getContext(),"click",Toast.LENGTH_LONG).show();
                }
            });

PLZ HELP 提前谢谢你。

1 个答案:

答案 0 :(得分:4)

保持代码完全相同但是 改变:

    ((ViewPager) collection).addView(view, 0);

    return view;

    ((ViewPager) collection).addView(v, 0);

    return v;

你在一个膨胀的按钮上做了onclick,然后你给了另一个视图,并且在屏幕上渲染了它,该按钮存在于你的应用程序的内存中,但没有其他地方,通过返回v,该按钮是绘制并在点击时调用onclicklistener。