Java 从Air本机扩展(android)显示ImageView时出现问题
首先我想说的是,我是java和android的初学者,我花了很多时间来尝试实现这一点,并寻找答案,但还是忍不住 我正在做一个Air本地扩展。如果现在我成功地创建了这封电子邮件,并且大部分呼叫都正常工作,那么当我从这封电子邮件中显示ImageView时,我就卡住了 似乎我需要了解一些东西才能正确显示ImageView,所以在启动时,我检索了一些信息,如活动、上下文和根视图Java 从Air本机扩展(android)显示ImageView时出现问题,java,android,air,Java,Android,Air,首先我想说的是,我是java和android的初学者,我花了很多时间来尝试实现这一点,并寻找答案,但还是忍不住 我正在做一个Air本地扩展。如果现在我成功地创建了这封电子邮件,并且大部分呼叫都正常工作,那么当我从这封电子邮件中显示ImageView时,我就卡住了 似乎我需要了解一些东西才能正确显示ImageView,所以在启动时,我检索了一些信息,如活动、上下文和根视图 public class MyContext extends FREContext { @Override
public class MyContext extends FREContext
{
@Override
public void dispose()
{
}
@Override
public Map<String, FREFunction> getFunctions()
{
Configs.activity = this.getActivity();
Configs.context = Configs.activity.getApplicationContext();
Configs.decorView = Configs.activity.getWindow().getDecorView();
Map<String, FREFunction> map = new HashMap<String, FREFunction>();
map.put("init" , new InitFunction());
map.put("oneFunction" , new myFunction());
return map;
}
}
然后我调用这个类从web加载一个图像,加载后我想在屏幕上显示它
public class GraphicLoader extends AsyncTask<URL, String, String>
{
public ImageView view;
private URL url;
private int width;
private int height;
// Constructor
public GraphicLoader (String url, int width, int height)
{
this.width = width;
this.height = height;
try
{
this.url = new URL (url);
}
catch (MalformedURLException e)
{
e.printStackTrace();
}
}
@Override
protected String doInBackground(URL... params)
{
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = false;
try
{
this.view = new ImageView (Configs.context);
view.setImageBitmap(BitmapFactory.decodeStream(url.openConnection().getInputStream(), null, options));
RelativeLayout relativeLayout = new RelativeLayout(Configs.context);
RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.CENTER_IN_PARENT);
view.setLayoutParams(lp);
relativeLayout.addView(view);
Configs.activity.setContentView(relativeLayout, rlp);
}
catch (IOException e)
{
Configs.debug = Configs.debug + " GraphicLoaded error 2 " + e.getMessage();
e.printStackTrace();
}
return null;
}
}
然后,我的应用程序在进入doInBackground函数时崩溃,位于Configs.activity.setContentViewrelativeLayout,rlp;行。我可能没有以正确的方式使用它,我尝试了多种方法来实现它,这取决于我在web上找到的内容,但没有成功,总是导致崩溃
应该怎么做
感谢您的帮助?因此我找到了解决方案,只需将这部分代码移出异步任务:
RelativeLayout relativeLayout = new RelativeLayout(Configs.context);
RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.CENTER_IN_PARENT);
view.setLayoutParams(lp);
relativeLayout.addView(view);
Configs.activity.setContentView(relativeLayout, rlp);
应用程序不再崩溃,将正确显示ImageView