What is initClickListener(), ComponentName, class.getPackage()?

Question

I am an android newbie also not very affluent with java. I am trying to to understand MobiStego source code.

Hence the following is a part of the project code I fail to understand fully.

Please help....

private void initClickListner()
    {
        Button buttonEncode = (Button) findViewById(R.id.ButtonEncode);
        buttonEncode.setOnClickListener(new Button.OnClickListener()
        {
            public void onClick(View v) {

                 Intent intent = new Intent();

                  intent.setComponent(new ComponentName(EncodeActivity.class.getPackage().getName(),
                          EncodeActivity.class.getCanonicalName()));
                  startActivity(intent);
            }
        }
        );

score 0 · Accepted Answer · answered Feb 10 '14 at 14:14

0

1-initClickListner() is a method that who is made herself. User method. Like;

public void myfunction(){ ..... ..... }

2-setcomponent and class.getpackage are kind of intent component. I suppose u know intent mechanism in android. This intent type for different package names in application. For example u have com.axample.yourappname and com.example.yourappname2 packages. This intent, cross intent for different package activities. If u want to call activity of second package from activity of first package u can call above function.

answered Feb 10 '14 at 14:14

MehmetF

61
1
14

thanks a lot, but please tell me how to figure out the number of packages in my android project and btw what does the term getCanonicalName mean....? – egor92 Feb 10 '14 at 14:28
Default u have 1 package in your app. Under your project u must see brown bundle. This is your package. If u right click on your project in eclipse and add new package u can see your second package. getCanonicalName; ClassDemo c = new ClassDemo(); Class cls = c.getClass(); // returns the canonical name of the underlying class if it exists System.out.println("Class = " + cls.getCanonicalName()); – MehmetF Feb 10 '14 at 14:34
Mark this question for apply dude. – MehmetF Feb 11 '14 at 18:55

score 0 · Answer 2 · edited May 23 '17 at 10:27

I would like to extend MehmetF's answer only. As he said, initClickListner() is only a user-defined method name, nothing special than that.
ComponentName acts as an identifier for a specific application component, this component may be an activity or a service.
class.getPackage().getName() is used to get the package name of the specified Class name before it.
These 2 links will also help you to have a clear idea:

EDIT: class.getCanonicalName() is the name that is used in an import statement and uniquely identifies the class. Well, i think you need to see these differences to understand clearly.

What is the difference between canonical name, simple name and class name in Java Class?

If you think that solves your problem then mark it as answer so that it can help others also. — ridoy, Feb 11 '14 at 13:23

What is initClickListener(), ComponentName, class.getPackage()?

2 Answers2