Android - Add Custom View to ListView

Question

I have a ListView , and I have a custom View , PostView .

How would I go about creating a new PostView() , and adding it to the ListView via .addFooterView() , but still being able to access the object representation of the PostView .

Right now I'm trying:

// the footer
p = new PostView( this );

p.setTargetUri( C.API_CONTENT );
p.setRenderMode( PostView.MODE_TEXT | PostView.MODE_IMAGE );

commentListView.addFooterView( p );

But that is failing, when I try to access the should have been inflated XML components.

Mainly:

public void setRenderMode( int renderMode )
{
  this.renderMode = renderMode;

  // fails
  this.postImagePreview = (ImageView)findViewById( R.id.new_post_image_preview );
}

Am I going about this wrong? I have an onFinishInflate() defined, but maybe I'm prematurely accessing the Views?

Answer 1

为什么不挂在成员变量中的实例上，而不是稍后再调用findViewById？

Answer 2

Is your setRenderMode within PostView or the Activity that uses PostView?

If it is in the activity, you should be doing:

this.postImagePreview = (ImageView)p.findViewById( R.id.new_post_image_preview );

with p being a reference to your PostView that you have created.

Answer 3

对我来说，解决方案是仅拥有一个超级自定义列表适配器，该适配器能够返回不同类型的视图，并在生成的列表内容周围手动添加页眉和页脚视图。