But do you want a Looper and Handler in your thread 't'?
Why do you load it in another thread?
Are you planning in dispatching and handling messages in this thread
't'?
If not, don't start adding all this stuff just to make the run-time
happy.
Put a breakpoint in your default constructor of your test.check.Test1
class and see which line of code needs a Handler or Looper.
What are you trying to accomplish? It looks like you're trying to load
and construct a class from an APK (check.apk). Are you initializing an
Activity from this APK called 'Test1'? If so, I understand why it may
need a looper/handler. But if you're loading an Activity (Test1)
within another Activity (the one trying to load check.apk), you may
get into a heap of other trouble. But i'm not an expert on this at
all. Google engineers will know much more about this.
On Apr 7, 10:55 am, Ask <asifk1...@gmail.com> wrote:
> Hi Streets,
>
> I dont think this is the case.
>
> Same code executes nicely If I call that method in the onCreate()
> method (i.e. main thread itself)
>
> problem occurs in the Object creation if I will call this method
> readTheFile() in the Thread.
> Can you give any info. regarding how I can define Looper and Handler
> in my code to execute it without any error.???
>
> On Apr 7, 7:00 pm, Streets Of Boston <flyingdutc...@gmail.com> wrote:
>
>
>
> > It could be that during the construction of class test.check.Test1, a
> > Handler or something similar (i.e. something needing the main-thread's
> > message-queue) is constructed. Look at your test.check.Test1
> > implementation and see if this is the case.
>
> > If this is the case, you will get an exception if the constructor of
> > test.check.Test1 is executed on any other thread than the main-thread
> > with the message queue.
>
> > You would have gotten the same exception if you would have called 'new
> > test.check.Test1()'.
>
> > On Apr 7, 9:17 am, Ask <asifk1...@gmail.com> wrote:
>
> > > Is there any handler needed for that?? Any Idea???
>
> > > On Apr 7, 3:58 pm, Ask <asifk1...@gmail.com> wrote:
>
> > > > Hi,
>
> > > > I am using Reflection APIs in the background thread to call a method
> > > > dynamically from another application but I am getting the Exception:
>
> > > > "java.lang.RuntimeException: Can't create handler inside thread that
> > > > has not called Looper.prepare() "
>
> > > > at a line : Object o = c.newInstance();
>
> > > > my code in the Thread is as follows,
> > > > onCreate
>
> > > > public void onCreate(Bundle icicle) {
> > > > super.onCreate(icicle);
> > > > setContentView(R.layout.main);
>
> > > > hh_text = (TextView)findViewById(R.id.server_start);
>
> > > > Thread t = new Thread()
> > > > {
> > > > public void run()
> > > > {
> > > > readTheFile();
>
> > > > }
>
> > > > };
> > > > t.start();
> > > > }
>
> > > > public void readTheFile() {
> > > > try {
>
> > > > PathClassLoader loader = new PathClassLoader( "/sdcard/
> > > > test.check.apk", ClassLoader.getSystemClassLoader());
> > > > Class c = null;
>
> > > > c = loader.loadClass("test.check.Test1");
>
> > > > Log.i("See"," Test Class Found ....");
>
> > > > Method method = c.getMethod("xyz", null);
>
> > > > Object o = c.newInstance(); // This line throws exception
> > > > String s = (String) method.invoke(o);
> > > > Log.i("See","Got method: " + s);
> > > > } catch (Exception e) {
> > > > // TODO Auto-generated catch block
> > > > e.printStackTrace();
> > > > } }
>
> > > > Please help.. If you know the issue.
>
> > > > On Apr 6, 7:14 pm, Ask <asifk1...@gmail.com> wrote:
>
> > > > > Thanx Mark for your quick reply. I will try it out and get back
>
> > > > > On Apr 6, 6:49 pm, Mark Murphy <mmur...@commonsware.com> wrote:
>
> > > > > > Asif k wrote:
> > > > > > > But in my case, I am getting all 3 messages at a time after
> > > > > > > activity execution completed.
>
> > > > > > That is probably because you are doing long-running work on the UI
> > > > > > thread.
>
> > > > > > > Is there any API available, using which
> > > > > > > I can show the status during the execution also.
>
> > > > > > Anything long-running should be in a background thread, in the
> > > > > > activity
> > > > > > or wrapped in a service. Then, use Handler or runOnUiThread() or
> > > > > > something so the background thread can have the UI thread update
> > > > > > your
> > > > > > TextView.
>
> > > > > > --
> > > > > > Mark Murphy (a Commons
> > > > > > Guy)http://commonsware.com|http://twitter.com/commonsguy
>
> > > > > > Android App Developer
> > > > > > Training:http://commonsware.com/training.html-Hidequotedtext-
>
> > > > > - Show quoted text -- Hide quoted text -
>
> > > > - Show quoted text -- Hide quoted text -
>
> > > - Show quoted text -- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
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