public class MainActivity extends AppCompatActivity {
GridView gridView;
Toolbar toolbar;
Dialog dialog;
AlertDialog alertDialog;
private ArrayList<String> arr; //to store the name of list of title
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//arraylist of our title names
arr = new ArrayList<>();
gridView = findViewById(R.id.gv); //grid view which contains list of names of title
adaptergv ad = new adaptergv(this,arr);
gridView.setAdapter(ad);
Add.setOnClickListener(new View.OnClickListener() { //listener which adds title name in arraylist
@Override
public void onClick(View view) {
String s = name.getText().toString(); //getting edittext content as string
int sum = 0; //to check if there is alphabets in edittext
for (int i = 0;i<s.length();i++){ //whole for loop will check if there is something written in edittext
String a = String.valueOf(s.charAt(i)); //value of string s at i index
if(!a.equals(" ")){ // true if there is character at certain index
sum+=1;
}
}
if( !s.equals("")&&sum!=0 ){ // if in edittext there is something written
arr.add(s); //adding new title
dialog.dismiss(); //dismising the dialog box
name.setText(null);// resetting edittext to null for 2nd time add got clicked
alert.setText(null); // resetting alert message to null for 2nd time add get clicked
}
else {
alert.setText("Enter the name"); //if user didnt put anything in name then display this message
}
}
});
I have been try to create a app like notes app in which user will add a name in list by clicking add button after that as u can see in code ,name will be store in arraylist so my problem is how can i store that title names after app is closed like let's say i added two names in listenter image description here and then when i reopened those two title should be there and after that i added two more names and i closed and reopend all four of them should be stored and there in app enter image description here(i am newbie and couln't find solution )
