我该怎么做?这是 GridView 适配器中的方法
public static void changeView(Bitmap bmp, int pos){
GridView gridView = new GridView(mContext);
ImageView view = (ImageView) gridView.getChildAt(pos);
if (view == null)
Log.e("ImageAdapter Error", "ImageView is null");
}
这是一个 getView 方法
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) {
// imageView = Inflater.inflate(R.layout.image_layout, null);
imageView = new ImageView(mContext);
if (DefinedValues.width/3 < DefinedValues.height/4)
imageView.setLayoutParams(new GridView.LayoutParams
(DefinedValues.height/4, DefinedValues.height/4));
else
imageView.setLayoutParams(new GridView.LayoutParams
(DefinedValues.width/3-5, DefinedValues.width/3-5));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(R.drawable.test3);
return imageView;
}
imageView 每次都是空的。并且可以在静态类中设置 Context 对象 mContext 吗?
这是一个将适配器附加到 gridView 的片段类
public class fragment1 extends Fragment {
/* (non-Javadoc)
* @see android.support.v4.app.Fragment#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
*/
GridView gridView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
//
Bundle savedInstanceState) {
if (container == null) {
Log.e("Null container", "Null");
return null;
}
Log.e("fragment1", "fragment1 reached!");
View view = inflater.inflate(R.layout.menu1_fragment, container, false);
gridView = (GridView)view.findViewById(R.id.gridview1);
gridView.setAdapter(new ImageAdapter(this.getActivity()));
gridView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
ImageView imageView = new ImageView(getActivity());
LinearLayout.LayoutParams vp = new LinearLayout.LayoutParams
(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
imageView.setLayoutParams(vp);
imageView.setImageBitmap(DefinedValues.imageContainer.get(position).getThumbnail());
getActivity().addContentView(imageView, vp);
}
});
return gridView;
}
}
MyImage 类:public void downloadThumbnail(){
DefinedValues.thumbnail.put("activity", DefinedValues.images);
DefinedValues.thumbnail.put("type", "thumbnail");
DefinedValues.thumbnail.put("name", this.name);
DefinedValues.thumbnail.put("width", DefinedValues.width + "");
//Creates request to server
String req = Json.stringToJson(DefinedValues.thumbnail);
Log.d(TAG, "downloadImage() called. Request to server: " + req);
DefinedValues.thumbnail.clear();
thumb = new ImageDownloader();
thumb.setListener(MyImage.this);
thumb.execute(req);
Log.d(TAG, "downloaded thumbnail nr." + imageCount);
}
public void returnImage(Bitmap res) {
Log.d(TAG, "Setting up thumbnail...");
this.setThumbnail(res);
}