我在循环中创建一些文本和图像视图,从另一个类接收一些数据,如何创建那些文本和图像视图并在AsyncTask中使用addview方法?
我在doInBackground方法中使用addview,这不起作用.. 另外,我不知道这是否是动态添加视图的最佳方式,欢迎提出建议!
class syncTask extends AsyncTask<Void, Void, Void> {
private ProgressDialog pd;
int increment=0;
RelativeLayout layout;
public syncTask(RelativeLayout layout) {
// TODO Auto-generated constructor stub
this.layout = layout;
}
@Override
protected void onPreExecute() {
pd = new ProgressDialog(main.this);
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pd.setProgress(0);
pd.setMax(0);
pd.setMessage("Loading friends");
pd.show();
}
@Override
protected Void doInBackground(Void... v) {
try
{
Set<User> users = LFMRestConnection.getFriendsNowListening(user, 1440);
for (User u : users) {
pd.setMax(max);
//album picture
album_pic = loadBitmap(u.getImageURL().getImageURL(ImageURL.Size.LARGE));
resized_a_p = android.graphics.Bitmap.createScaledBitmap(album_pic, (width/3), (width/3), true);
iv_album = new ImageView(main.this);
iv_album.setImageBitmap(resized_a_p);
iv_album.layout(0, 0, 0, 0);
iv_album.setPadding(width-resized_a_p.getWidth()-5, t_img, 5, 0);
//profile picture
user_pic = loadBitmap(u.getImageURL().getImageURL(ImageURL.Size.LARGE));
resized_u_p = android.graphics.Bitmap.createScaledBitmap(user_pic, ((width/4)-10)/2, ((width/4)-10)/2, true);
iv_user = new ImageView(main.this);
iv_user.setImageBitmap(resized_u_p);
iv_user.setLayoutParams(params_2);
iv_user.layout(0, 0, 0, 0);
iv_user.setPadding(0, (t_img+resized_a_p.getHeight())-resized_u_p.getHeight(), resized_a_p.getWidth()+10, 0);
//shapes
//shapes = new shapes(this, (t_img+resized_a_p.getHeight()), resized_a_p.getWidth()+10);
//username text position
tv_user = new TextView(main.this);
tv_user.layout(0, 0, 0, 0);
tv_user.setTextSize(12);
tv_user.setPadding(0, (t_img+resized_a_p.getHeight())-resized_u_p.getHeight()+14, (resized_a_p.getWidth()+resized_u_p.getWidth())+15, 0);
tv_user.setGravity(Gravity.RIGHT);
tv_user.setLayoutParams(params_1);
//artist text position
tv_artist = new TextView(main.this);
tv_artist.layout(0, 0, 0, 0);
tv_artist.setTextSize(20);
tv_artist.setPadding(5, t_img-10, 0, 0);
tv_artist.setGravity(Gravity.LEFT);
//track text position
tv_info = new TextView(main.this);
tv_info.setTextSize(12);
tv_info.layout(0, 0, 0, 0);
tv_info.setPadding(5, t_img+12, 0, 0);
tv_info.setGravity(Gravity.LEFT);
//artist
tv_artist.setTypeface(null, Typeface.BOLD);
tv_artist.setText(u.getLastTrack().getArtistName());
//username
tv_user.setTypeface(null, Typeface.NORMAL);
tv_user.setText(u.getUserName()+"\n");
tv_user.append(u.getRealName());
//track
tv_info.setTypeface(null, Typeface.NORMAL);
tv_info.append("\n" + u.getLastTrack().getTrackName());
tv_info.append("\n" + u.getLastTrack().getAlbumName());
//move position
t_img+=(width/3)+20;
increment++;
pd.incrementProgressBy(increment);
//views
layout.addView(iv_album);
layout.addView(iv_user);
layout.addView(tv_info);
layout.addView(tv_user);
layout.addView(tv_artist);
}
}
catch(Exception e)
{
//startActivity(i);
System.out.println("Error");
//finish();
}
return null;
}
@Override
protected void onPostExecute(Void result) {
pd.dismiss();
}