CODEWITHSUNDEEP
androidandroid-context
Ram Keerthy
Ram Keerthy

Reputation: 227

what does a context contain?

I am new to android and I have read about context in Android Documentation and in below given link,

What is 'Context' on Android?

If suppose I have a class and it contains some methods in it, for instance consider the below given code snippet.

Sample1.java

class Sample1 extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_login);

        Sample2.function1(Sample1.this);
    }
    public void func1()
    {
        //...
    }
    public void func2()
    {
        //...
    }
    public void func3()
    {
        //...
    }
}

Sample2.java

class Sample2 extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_login);
    }
    public static void function1(Context context){
        //can I access all the public methods present in sample1 class
    }
}

Please do pardon me if the doubt is wrong. I am trying to understand the basics. Any help would be appreciable and thanks in advance.

Upvotes: 1

Views: 253

Answers (5)

vijay maddhesiya
vijay maddhesiya

Reputation: 48

if both are static function then it is possible, Static method is inherited in subclass but it is not polymorphism.

class Sample1 extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_login);

        Sample2.function1(Sample1.this);
    }
    public static void func1()
    {
        //...
    }
    public static void func2()
    {
        //...
    }
    public staic void func3()
    {
        //...
    }
}

after that you use `enter code here`

class Sample2 extends AppCompatActivity {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_login);
    }
    public static void function1(Context context){
        //can I access all the public methods present in sample1 class
    }
}

Upvotes: 0

Aastha Doshi
Aastha Doshi

Reputation: 147

Yes absolutely you can do this even if you use a default java class then also you can call the function of that class into another activity.Here there be no conflict if you use the keyword static.

Upvotes: 1

Zafar Hussain
Zafar Hussain

Reputation: 268

As the name suggests, it's the context of current state of the application/object. It lets newly-created objects understand what has been going on. Typically you call it to get information regarding another part of your program (activity and package/application).

You can get the context by invoking getApplicationContext(), getContext(), getBaseContext() or this (when in a class that extends from Context, such as the Application, Activity, Service and IntentService classes).

Typical uses of context:

Creating new objects: Creating new views, adapters, listeners:

TextView tv = new TextView(getContext()); ListAdapter adapter = new SimpleCursorAdapter(getApplicationContext(), ...); Accessing standard common resources: Services like LAYOUT_INFLATER_SERVICE, SharedPreferences:

context.getSystemService(LAYOUT_INFLATER_SERVICE) getApplicationContext().getSharedPreferences(name, mode); Accessing components implicitly: Regarding content providers, broadcasts, intent

getApplicationContext().getContentResolver().query(uri, ...);

Upvotes: 0

Parth Suthar
Parth Suthar

Reputation: 123

Yes you can. Consider below your Sample2.java file.

class Sample2 extends AppCompatActivity {
    public static Sample2 sample2;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_login);
        sample2 = this;
    }
    public static Sample2 function1(Context context){
        //can I access all the public methods present in sample1 class
        return sample2;
    }
}

Upvotes: -1

GianhTran
GianhTran

Reputation: 3711

Its impossible, you can not do it, because in static method, you can only invoke another static method,

Upvotes: 1

Related Questions