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목록보기에서 다른 활동으로 이미지를 보내려고합니다. 나는 대부분 일을 해냈다 고 생각하지만, 나는 진지하게 nullpointerexeptioon을 얻고있다. 내 비트 맵이 null 인 것 같습니다. 선택한 항목의 이미지를 자원으로 비트 맵에 전달하려면 어떻게해야합니까?listview에서 이미지를 가져 오는 방법은 무엇입니까?
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long id) {
ImageView imm_id = ((ImageView) arg1.findViewById(R.id.imagePrev));
imm_id.getId();
RequestDataHolder.request_id = ids.get(position);
Bitmap bitmap=BitmapFactory.decodeResource(getResources(), imm_id.getId());
ByteArrayOutputStream stream=new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 90, stream);
byte[] imm=stream.toByteArray();
Intent i = new Intent(getApplicationContext(),ResultViewActivity.class);
i.putExtra("imMap", imm);
startActivity(i);
어댑터
public class MediaItemAdapter extends SimpleAdapter {
private int[] colors = new int[] { 0x30FF0000, 0x300000FF };
public static boolean notifyFlag = false;
private Context localContext;
private List<HashMap<String, Object>> locallist;
private static LayoutInflater inflater=null;
private Object rslv;
public ImageView imgV;
public String valueV;
Map cache = new HashMap();
public MediaItemAdapter(Context context,
List<HashMap<String, Object>> items, int resource,
String[] from,
int[] to) {
super(context, items, resource, from, to);
localContext = context;
locallist = items;
inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public void setViewText(TextView v, String text) {
// метод супер-класса, который вставляет текст
super.setViewText(v, text);
{
v.setText(Html.fromHtml(text));
}
}
@Override
public void setViewImage(ImageView v, String value) {
imgV = v;
valueV = value;
super.setViewImage(v, value);
if (imgV.getId() == R.id.imagePrev) {
if (value == null || value.trim().length() <= 0
|| value.equalsIgnoreCase("null")
|| value.trim().equalsIgnoreCase("")) {
imgV.setImageResource(R.drawable.stub);
// do nothing
} else {
if (cache.get(value) == null
&& !SearchPostActivity.loadingMore) {
notifyFlag = false;
new LazyImageLoader(localContext, value).execute();
} else {
imgV.setImageBitmap((Bitmap) cache.get(value));
}
}
}
}
class LazyImageLoader extends AsyncTask<String, Integer, Bitmap> {
private String URL;
private Context context;
public LazyImageLoader(Context context, String Url) {
URL = Url;
LazyImageLoader.this.context = context;
}
@Override
protected void onPreExecute() {
imgV.setImageResource(R.drawable.home);
}
@Override
protected Bitmap doInBackground(String... params) {
return getImg();
}
@Override
protected void onPostExecute(Bitmap img) {
if (!SearchPostActivity.scrollFlag) {
imgV.setImageBitmap(img);
notifyDataSetChanged();
}
notifyFlag = true;
cache.put(URL, img);
}
public synchronized Bitmap getImg() {
Bitmap bm = null;
try {
URL myurl;
myurl = new URL(URL);
URLConnection conn = myurl.openConnection();
conn.connect();
InputStream is = conn.getInputStream();
bm = BitmapFactory.decodeStream(is);
} catch (Exception e) {
e.printStackTrace();
}
return bm;
}
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.item_composer, null);
ImageView thumb_image=(ImageView)vi.findViewById(R.id.imagePrev);
return vi;
}
}