Start a new Activity from Fragment

Question

Using Android Studio, I have my MainActiviy class with a Placeholder fragment. This fragment has buttons, but one has to load an Activity. How does one do this? I was tol

Answer 1

For fragment you have to use getactivity().... For Example:

Intent intent = new Intent(getActivity(), AnotherActivity.class);
startActivity(intent);

Answer 2

If it is in holder:

holder.itemView.setOnClickListener {
       val intent = Intent(context, AnotherActivity::class.java)
       intent.putExtra("text", "From fragment") . // send data
       context.startActivity(intent)
}

And in the AnotherActivity:

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_another.*


class AnotherActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_another)
    }

    public override fun onStart() {
        super.onStart()
        textView.text = "Received text:" + intent.getStringExtra("text")!!
    }
}

Answer 3

If you have a look at the documentation you can see that to start an activity you'll want to use the following code

Intent intent = new Intent(getActivity(), AnotherActivity.class);
startActivity(intent);

Currently you're using MainActivity.class in a place that requires a context object. If you're currently in an activity, just passing this is enough. A fragment can get the activity via the getActivity() function.

Your full code above should look like this

Button button = (Button) rootView.findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent intent = new Intent(getActivity(), AnotherActivity.class);
        startActivity(intent);
    }
});

Answer 4

In case of fragment, write getActivity() to get activity context instead of giving the name of activity explicitly. For example, if you want to open SecondActivity from a fragment,

Intent intent=new Intent(getActivity(),SecondActivity.xml); StartActivity(i);

Answer 5

If you have to use it inside onBindViewHolder, you may do this:

@Override
public void onClick(View view) {
    Intent intent= new Intent(view.getContext(), MainActivity.class);
    view.getContext().startActivity(intent);
}

Answer 6

Button button = (Button) view.findViewById(R.id.button_ID);
button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent myintent = new Intent(getActivity(), CallingActivity.class);
        startActivity(myintent);
    }
});