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我在我的应用程序中实现了一个使用 ViewPager 的活动,并带有一个 PagerAdapter 来显示 4 个图像。您一次只能看到一张图片,要显示下一张,您必须滑动它。图像的大小不是很大,我不知道为什么,但会发生错误“java.lang.OutOfMemoryError 位图大小超过 VM 预算 pageradapter”。

这是我的代码:

    public class InfoActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.information);

        MyPagerAdapter adapter = new MyPagerAdapter();
        ViewPager myPager = (ViewPager) findViewById(R.id.mypanelpager);
        myPager.setAdapter(adapter);
        myPager.setCurrentItem(0);
    }

    private class MyPagerAdapter extends PagerAdapter {

        public int getCount() {
            return 4;
        }

        public Object instantiateItem(View collection, int position) {

            LayoutInflater inflater = (LayoutInflater) collection.getContext()
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            int resId = 0;
            switch (position) {
            case 0:
                resId = R.layout.farleft;
                break;
            case 1:
                resId = R.layout.left;
                break;
            case 2:
                resId = R.layout.middle;
                break;
            case 3:
                resId = R.layout.right;
                break;
            }

            View view = inflater.inflate(resId, null);

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

            return view;
        }

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

        @Override
        public void finishUpdate(View arg0) {

        }

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

        }

        @Override
        public void restoreState(Parcelable arg0, ClassLoader arg1) {

        }

        @Override
        public Parcelable saveState() {
            return null;
        }

        @Override
        public void startUpdate(View arg0) {
        }

    }

}

R.layout.right 是:

    <?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="fill_parent"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:adjustViewBounds="true"
        android:scaleType="fitXY"
        android:src="@drawable/info4" 
        android:contentDescription="@string/fourthInfoImage">
    </ImageView>

</LinearLayout>

除了源图像之外,其他都是平等的。我该如何纠正这个错误?有几篇关于该错误的帖子,但我没有找到解决我的问题的帖子。我相信没有调用“destroyItem”函数..

谢谢

PS其实我按照http://mobile.tutsplus.com上的教程

4

1 回答 1

3

希望这会有所帮助http://developer.android.com/training/displaying-bitmaps/load-bitmap.html

于 2012-05-16T16:36:53.217 回答