在 android 工作室中单击时，如何使单选按钮在另一个活动中显示文本？

Question

I have 6 options that the user can select from and a button that takes them to the next page when clicked. I have two pages like this. After one choice from each page is selected, I would like to display certain text depending on the radio buttons clicked previously, in another activity. How can I do this in java in android studio?

Answer 1

If you are controlling the FragmentManager you can just pass the options as an argument to the next Fragment 's constructor otherwise, you can save everything in a static variable (as long as no Views are in there, so don't store the radio buttons there) and access that variable from outside.

Like this:

public class MyFragment {
    public static boolean isRadioButtonXPressed = false; //change to true if it's pressed by default

    public void onCreate(...) {
        radioButtonX.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                isRadioButtonXPressed = checked;
            }
        });
    }
}

//from the other fragment
public class MyFragment2 {
    public void onCreateView(...) {
        if (MyFragment.isRadioButtonXPressed) {
            //it's been pressed
        } else {
            //it's not been pressed
        }
    }
}

There are many different ways.

Answer 2

As you are using activity, you can use Intent to pass data. Here is a sample:

Intent page = new Intent(FirstActivity.this, SecondActivity.class);
page.putExtra("key", "This is my text");
startActivity(page);

For getting the value on Second Activity onCreate() method:

String value = getIntent().getStringExtra("key");