如何正确使用notify（）来启动新活动？

Question

I have recyclerview connected to my SecondActivity and in Adapter's onclick method I call a method in my Second Activity. But that method needs to be static. I want to animate between slides, so when I click on one of the options of recyclerview screen should do slide_out_right animation onto third activity. Following is code in Adapter

     holder.mView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String selectedOption = item.getSelectedOption;//item is object of Item class(class used to populate recyclerview)
            SecondActivity.startThirdActivity(selectedOption);
        }
    });

Following is the method in SecondActivity

public static void startThirdActivity(String recyclerSelectedOption) {
    Intent intent = new Intent(this, ThirdActivity.class);
    Bundle extras = new Bundle();
    extras.putString(MESSAGE_FROM_SECOND, recyclerSelectedOption);
    intent.putExtras(extras);
    startActivity(intent);
    overridePendingTransition(android.R.anim.slide_in_left, android.R.anim.slide_out_right);

}

Now as many of you will know that startActivity is a non-static method and I can't call it from static method. But I also can't call non-static method from static recycler view. So I want to create a variable in my secondActivity and set it to null. And I want a method to be called when this variable is set with a selected option from recyclerList, which will be non-static and which can jump to ThirdActivity using startActivity() method.

I know it's a bit of a big question. Obviousely if you know of another way by which I can avoid doing all this and just animate directly from Adapter to ThirdActivity then let me know. Thanks, HyperCoder

Answer 1

Use interface.

public interface OnItemClickListener {
    void onItemClick(String item);
}

Now adapter constructor will be

private final OnItemClickListener listener;
public CustomAdapterAdapter(OnItemClickListener listener) {
    this.listener = listener;
}

Now onclick listener pass selcted option

holder.mView.setOnClickListener(new View.OnClickListener() {
        @Override public void onClick(View v) {
            String selectedOption = item.getSelectedOption;
            listener.onItemClick(selectedOption );
        }
    });

You have to implement OnItemClickListener on SecondActivity

public class SecondActivity extends AppCompatActivity implements OnItemClickListener{
        @Override
        public void onItemClick(String item){
            startThirdActivity(item)
            }

}

Answer 2

You can pass the context from the view to SecondActivity like this:

SecondActivity.startThirdActivity(selectedOption, view.getContext())

And then use the context to start the activity like this:

context.startActivity(intent);

I believe you can call overridePendingTransition in onCreate of ThirdActivit