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

        you can achieve this using a interface,by sending your data from a fragment to main activity,below i have edited your complete code and its working fine....
       Here is the code with example
        Your Main Activity
        package com.example.dialogfragment;

        import android.annotation.TargetApi;
        import android.app.Activity;
        import android.os.Build;
        import android.os.Bundle;
        import android.view.View;
        import android.widget.Button;
        import android.widget.TextView;

        @TargetApi(Build.VERSION_CODES.HONEYCOMB)
        public class MainActivity extends Activity  implements SetName{
            Button showDialog;
            TextView showText;
            @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);
                showDialog = (Button)findViewById(R.id.button1);
                showText = (TextView)findViewById(R.id.textView2);
                showDialog.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        showMyAlert(v);
                    }
                });
            }

            public void showMyAlert(View view) {
                MyAlert myAlert = new MyAlert();
                myAlert.show(getFragmentManager(), "My New Alert");
            }

            public void setMyNameStr(String myNameStr) {

            }


            @Override
            public void setMyName(String string) {
                // TODO Auto-generated method stub

                showText.setText(string);

            }

        }

    Your Alert
    import android.annotation.TargetApi;
    import android.app.Activity;
    import android.app.AlertDialog;
    import android.app.Dialog;
    import android.app.DialogFragment;
    import android.content.DialogInterface;
    import android.content.DialogInterface.OnClickListener;
    import android.os.Build;
    import android.os.Bundle;
    import android.text.InputType;
    import android.util.Log;
    import android.widget.EditText;

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public class MyAlert extends DialogFragment implements OnClickListener {

        private EditText getEditText;
        MainActivity callBackActivity;
        SetName setname;

        @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 onAttach(Activity a) {
            super.onAttach(a);
            setname = (SetName) a;
        }
        @Override
        public void onClick(DialogInterface dialog, int which) {
            String value = getEditText.getText().toString();
            Log.d("Name : ", value);
            // MainActivity mainActivity = new MainActivity();
            setname .setMyName(value);
            //setname = (SetName)
            // setname = (SetName)getActivity();
            dialog.dismiss();
        }


    }

Create a Interface

public interface SetName {


    void setMyName(String string);

}


Now what you should do is create onAttach in your alertFragment and call your interface..