Apps How to create a sub-activity

[expoxiao]

Hi

How to create a sub-activity in ECLIPSE which is in the same package with main activity or peer activity?

 

[JamTheMan]

Add a new class that extends Activity?

Or what do you mean by sub-activity?

 

[miXer]

If you mean, how to make a new .java file with the other .java files in your package, here goes:
- Right click the package where you want the .java file to be stored
- Click New
- Click Class
- And in the Name field, put in the name of the class

 

[expoxiao]

Thanks for reply. I used this procedure to create a main java file and other two class in the same package. In mail java class i have two calls of Intent to revoke the other two class. The compile is correct and load the apk activity is success. But when I try open the application in emulator, it display the application is stopped unexpectedly.

I don't know what is the reason for this issue. Could you please give me hints.

Thanks

 

[miXer]

We need to see the exception thrown in logcat and the code which generates the exception.

- Open logcat: Window > Show view > Other, Android > Logcat
- Start app in emulator
- Take picture/screenshot/whatever of the exception thrown in logcat from the app

 

[expoxiao]

We need to see the exception thrown in logcat and the code which generates the exception.

- Open logcat: Window > Show view > Other, Android > Logcat
- Start app in emulator
- Take picture/screenshot/whatever of the exception thrown in logcat from the app

The screenshot jpeg is not visible on reply

 

[expoxiao]

Please see the attached jpeg file for exceptions I grabbed
The code of creating these exceptions are following:

import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TabHost;

public class IntentTabsdemo extends TabActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TabHost host=getTabHost();
host.addTab(host.newTabSpec("one").setIndicator("CW").setContent(new Intent(this, CWBrowser.class)));
host.addTab(host.newTabSpec("two").setIndicator("Android").setContent(new Intent(this, AndroidBrowser.class)));
}
}

Thank you for your reply

 

[miXer]

It says the problem is on line 14 and it cant find the activity. Have you added all activities to AndroidManifes.xml?

 

[JamTheMan]

#( Also my first thought... All activities that are used by your app have to be registered in the Manifest.xml fil!!!

Like this:

<activity
	  android:name=".ActivityClassName"
	  android:label="@string/activities_header"
/>