我已经看到了与此主题相关的所有问题,但没有找到解决方案,在我的情况下,viewpager没有显示任何内容,其简单的图像滑块,而且toast出现,因为我正在交换,但没有看到图像和文本,以及我添加这些行时(如其他解决方案所述)
((ViewPager) container).addView(iv, 0);
((ViewPager) container).addView(tv, 0);
它给了我错误
android.support.v4.view.ViewPager $ LayoutParams无法强制转换为android.view.ViewGroup $ MarginLayoutParams
这是我的main.xml文件(内部相对布局):
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/view_pager"/>
这是viewPager适配器
public class ClsCustomPagerViewAdapter extends PagerAdapter {
int[] layouts;
String[] titles;
LayoutInflater layoutInflater;
Context context;
public ClsCustomPagerViewAdapter(Context context, int[] layouts,
String[] titles) {
this.layouts = layouts;
this.titles = titles;
this.context = context;
layoutInflater = LayoutInflater.from(context);
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((ViewGroup) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
View imageLayout = layoutInflater.inflate(R.layout.image_placeholder
, container);
TextView tv = (TextView) imageLayout.findViewById(R.id.tv);
ImageView iv = (ImageView) imageLayout.findViewById(R.id.iv);
Toast.makeText(context,
"Viewpagers " + titles[position] ,
Toast.LENGTH_SHORT).show();
tv.setText(titles[position]);
iv.setImageResource(layouts[position]);
((ViewPager) container).addView(iv, 0);
((ViewPager) container).addView(tv, 0);
return imageLayout;
}
@Override
public int getCount() {
return layouts.length;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
这是viewpager适配器的图像和textviews布局(在framelayout内部)
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv"
android:text="Hello world"
android:gravity="center_horizontal"
android:layout_marginTop="20dp"
android:layout_alignTop="@+id/iv"
android:layout_alignBottom="@+id/iv"
android:layout_alignLeft="@+id/iv"
android:layout_alignRight="@+id/iv"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/iv"
/>
答案 0 :(得分:2)
替换这两行代码
((ViewPager) container).addView(iv, 0);
((ViewPager) container).addView(tv, 0);
与
container.addView(imageLayout);
<强>编辑:强>
另外
View imageLayout = layoutInflater.inflate(R.layout.image_placeholder
, container);
与
View imageLayout = layoutInflater.inflate(R.layout.image_placeholder
, container, false);