In ListView, when you click on Item in another Activity, a textView line was added, when 2 clicks, a line was added to the same textview

When you click on Item in another Activity, a textView line is added. When you click 2, a line is added to the same textview.

final ArrayList<String> list = new ArrayList<>(); list.add("2400x3300 -С 246 01 05 59.4"); ListView lv = findViewById(R.id.lv); final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list); lv.setAdapter(adapter); lv.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { String selected = list.get(i); Intent intent=new Intent(Sk.this,Danie.class); intent.putExtra("text",selected ); startActivity(intent); 

and in the first activation

 Intent intent = getIntent(); String text = intent.getStringExtra("text"); list.add(text); for (int i = 0; i < list.size(); i++) { textView.append(list.get(i) + System.getProperty("line.separator")); }