Android changing the TextView from another activity

Issue

I have two activities where the main one has a TextView which can be altered in a sharedPreference in the second activity. When the user wants to change or "saves" the string, it saves it in the SP file, and returns back to the main activity. However, the TextView DOES not change to the new one and shows the old one. The app needs to restart for it to work.

My goal was to use the activity lifestle upon the systems onResume but that didn't pick up the new string at all.

I am asking how to change the TextView upon saving/returning from the second activity. The line in question is: checkboxmessage = (sp.getString("checkboxdescr", ""));

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_main);

    //
    //  sp= PreferenceManager.getDefaultSharedPreferences(getApplicationContext()); // forget about
    sp = getSharedPreferences("contactapp", 0);
    // named preferences - get the default ones and finish with it


    //SET TEXTS


    smsintroduction = (sp.getString("intro", ""));
    smsbody = (sp.getString("body", ""));
    checkboxtext = (sp.getString("checkbody", ""));
    checkboxmessage = (sp.getString("checkboxdescr", ""));

    TextView tv = (TextView) findViewById(R.id.sexycheckbox);
    tv.setText(checkboxtext);

    CheckBox cb = (CheckBox) findViewById(R.id.sexycheckbox);

    ////TOPCLEAR
    TextView tt = (TextView)findViewById(R.id.toptext2);
    tt.setOnClickListener(new View.OnClickListener() { 
        @Override
        public void onClick(View v) {

            EditText et = (EditText)findViewById(R.id.edit_name);
                    EditText et2 = (EditText)findViewById(R.id.edit_number);
                    et.setText("");
                    et2.setText("");
                    CheckBox sexycheck;
                     sexycheck = (CheckBox)findViewById(R.id.sexycheckbox);
                    if (sexycheck.isChecked()) {
                        sexycheck.setChecked(false);
                    }
        }
    });

}

protected void onResume(Bundle savedInstanceState){

    super.onCreate(savedInstanceState);
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_main);

    sp = getSharedPreferences("contactapp", 0);

    smsintroduction = (sp.getString("intro", ""));
    smsbody = (sp.getString("body", ""));
    checkboxtext = (sp.getString("checkbody", ""));
    checkboxmessage = (sp.getString("checkboxdescr", ""));

    TextView tv1 = (TextView) findViewById(R.id.sexycheckbox);
    tv1.setText(checkboxtext);
}

Solution

Change your code like this and see if it works:

@Override
protected void onResume() {

    super.onResume();

    tv1.setText("new Text test");
}

Answered By - Ultimo_m