How to get the Data from DialogFragment to MainActivity in Android?

Question

I create a application using DialogFragment.I want to get the Data from DialogFragment and setText in the MainActivity. I

Answer 1

Create an interface like-

CustomDialogInterface.java

public interface CustomDialogInterface {
    
        // This is just a regular method so it can return something or
        // take arguments if you like.
    public void okButtonClicked(String  value);

    
}

and modify your MyAlert.java by-

public class MyAlert extends DialogFragment implements OnClickListener {

private EditText getEditText;
MainActivity callBackActivity;
CustomDialogInterface customDI;

public MyAlert(CustomDialogInterface customDI)
{
    this.customDI = customDI;
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {

    callBackActivity = new MainActivity();
    getEditText = new EditText(getActivity());
    getEditText.setInputType(InputType.TYPE_CLASS_TEXT);
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setTitle("Get UserName :");
    builder.setMessage("Enter Your Name :");
    builder.setPositiveButton("Ok", this);
    builder.setNegativeButton("Cancel", null);
    builder.setView(getEditText);
    return builder.create();
}

@Override
public void onClick(DialogInterface dialog, int which) {
    String value = getEditText.getText().toString();
    Log.d("Name : ", value);
    dialog.dismiss();
    customDI.okButtonClicked(value);


}


void setCustomDialogInterface(CustomDialogInterface customDialogInterface){
    this. customDI = customDialogInterface;
c}

}

And implement CustomDialogInterface in your MainActivity and overide method okButtonClicked() When onClick will be called then your MainActivity's onButtonClicked will be called .

and change showAlert to -

class MainActivity..... implements CustomDialogInterface { 
        
        public void showMyAlert(View view) {
             MyAlert myAlert = new MyAlert(this);
             myAlert.show(getFragmentManager(), "My New Alert");
        }
        
        @Overide
        public void okButtonClicked(String  value){
            // handle 
        }
    }

or use following code :

  public void showMyAlert(View view) {

     MyAlert myAlert = new MyAlert(this);
     myAlert.setCustomDialogInterface(new CustomDialogInterface() {
            @Override
            public void okButtonClicked(String value) {
                //handle click
            }
        });
     myAlert.show(getFragmentManager(), "My New Alert");        
     
}