Null Pointer Exception when Drawing an image
I am having a problem with setting an ImageView image to an image which has been fetched from a URL. Here is the method used to turn the URL into a Drawable object:
private Drawable LoadImage(String url){
try
{
InputStream is = (InputStream) new URL(url).getContent();
Drawable d = Drawable.createFromStream(is, "src");
return d;
}catch (Exception e) {
System.out.println("Exc="+e);
return null;
}
}
Here is the code to call the method:
Drawable drawable = LoadImage("www.myurl.com/image.jpg");
imageView.setImageDrawable(drawable); //here is where I think it goes wrong
It gives me a Null Pointer Exception but when I display the drawable.toString() variable in a text view I get something like this开发者_运维知识库:
android.graphics.drawable.BitMapDrawable@43e5bb18
So it shows it's not returning null and fails when it tries to draw it. Am I missing something in the manifest or is there something wrong with my code?
First of all... don't use System.out on Android. Use Log instead.
I assume your LoadImage function returns null.
Take a look at the documentation about what ddms and logcat is and than try to get some more information about what happens.
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