我想通过以下方式动态设置线性布局背景:
现在我被困在了第三步。有人能帮上忙吗?
发布于 2011-10-04 19:04:53
使用以下命令:
Bitmap bmImg = BitmapFactory.decodeStream(is);
BitmapDrawable background = new BitmapDrawable(bmImg);
linearLayout.setBackgroundDrawable(background);
发布于 2014-05-02 13:44:49
我已经这样做了:
private RelativeLayout relativeLayout;
onCreate
relativeLayout= (RelativeLayout)findViewById(R.id.relativeLayout);
new LoadBackground("http://www.tmonews.com/wp-content/uploads/2012/10/androidfigure.jpg",
"androidfigure").execute();
AsyncTask to load image in background
private class LoadBackground extends AsyncTask<String, Void, Drawable> {
private String imageUrl , imageName;
public LoadBackground(String url, String file_name) {
this.imageUrl = url;
this.imageName = file_name;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected Drawable doInBackground(String... urls) {
try {
InputStream is = (InputStream) this.fetch(this.imageUrl);
Drawable d = Drawable.createFromStream(is, this.imageName);
return d;
} catch (MalformedURLException e) {
e.printStackTrace();
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
private Object fetch(String address) throws MalformedURLException,IOException {
URL url = new URL(address);
Object content = url.getContent();
return content;
}
@Override
protected void onPostExecute(Drawable result) {
super.onPostExecute(result);
relativeLayout.setBackgroundDrawable(result);
}
}
希望这能对你有所帮助。
发布于 2011-10-04 19:11:54
一种更简单的方法:
BitmapDrawable d = new BitmapDrawable("/sdcard/data/image.jpg");
linearLayout.setBackgroundDrawable(d);
https://stackoverflow.com/questions/7646766
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