how to pass extra intent to two activities

Question

i have an app that on the first activity asks the persons name on the second page it displays the name in a sentence i want to use the name in the third fourth or 9th activity how do i properly declare it (public?) and call it when and where ever i need it? this is my code sending it

Main

public class MainActivity extends Activity {
Button ok;
EditText name;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    name=(EditText)findViewById(R.id.editText);
    Typeface font_a = Typeface.createFromAsset(getAssets(),"fonts/MarkerFelt.ttf");
    name.setTypeface(font_a);
    ok=(Button)findViewById(R.id.button);
       Typefacefont_b=Typeface.createFromAsset(getAssets(),
"fonts/SignPaintersGothicShaded.ttf");
    ok.setTypeface(font_b);

    ok.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View arg0) {
            String nameStr = name.getText().toString();

            Intent intent = new Intent(getApplicationContext(), SecondActivity.class);
            intent.putExtra("NAMEDATA",nameStr);
            startActivity(intent);

        }
    });

}

and this is activity 2 receiving it

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);
    t = (TextView)findViewById(R.id.textView3);
    Typeface font_b = Typeface.createFromAsset(getAssets(),"fonts/MarkerFelt.ttf");
    t.setTypeface(font_b);
    String n = this.getIntent().getStringExtra("NAMEDATA");
    t.setText(n);

so please how would i reuse this?

Answer 1

Use SharedPreferences to save the name or whatever variable you need, then read whenever you need it. First, create global in MainActivity which will be used as preference file name:

public static final String PREFS_NAME = "MyPrefsFile";

Then, to save:

SharedPreferences settings = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.putString("name", name);
editor.commit();

to load:

SharedPreferences settings = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
String name = settings.getString("name", "John");

Once saved, the prefs are accessible for every activity.

So in your case, save the name when ok button is pressed:

ok.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View arg0) {
        String nameStr = name.getText().toString();

        SharedPreferences settings = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = settings.edit();
        editor.putString("name", nameStr);
        editor.commit();

        Intent intent = new Intent(getApplicationContext(), SecondActivity.class);
        startActivity(intent);

    }
});

Then read it:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_second);

    t = (TextView)findViewById(R.id.textView3);
    Typeface font_b = Typeface.createFromAsset(getAssets(),"fonts/MarkerFelt.ttf");
    t.setTypeface(font_b);

    SharedPreferences settings = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
    String n = settings.getString("name", "defaultName");
    t.setText(n);

You can do similarly in every activity you need it. See docs here.