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POSave ArrayList to memory and read it
 

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    <p>i got this code into my app, i need that when you click "OK" or "Borrar" on the pop up Dialog save the ArrayList "al" so when i close the app and open it again, the list have the previous items, i tried so hard but i cant figure it out, i started with java 6 days ago so i don't have much idea, thanks!</p> <pre><code>public class Iniciado extends Activity { TextView tv3; ListView listView; final Context context = this; final ArrayList&lt;String&gt; al = new ArrayList&lt;String&gt;(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.iniciado); conseguirdatos(); tv3=(TextView)findViewById(R.id.tv3); Bundle bolsar = getIntent().getExtras(); tv3.setText("Bienvenido "+ bolsar.getString("NombreKey")); listView = (ListView)findViewById(R.id.list); // Defined Array values to show in ListView final ArrayAdapter&lt;String&gt; adapter = new ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_list_item_1, android.R.id.text1, al); // Assign adapter to ListView listView.setAdapter(adapter); // ListView Item Click Listener listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { // ListView Clicked item index final int itemPosition = position; // ListView Clicked item value String itemValue = (String) listView.getItemAtPosition(position); // Show Alert Toast.makeText(getApplicationContext(), "Position :"+itemPosition+" ListItem : " +itemValue , Toast.LENGTH_LONG) .show(); // Make Dialog final Dialog dialog = new Dialog(context); dialog.setContentView(R.layout.cambiar); dialog.setTitle("Editar evento"); // set the custom dialog components - text, image and button final EditText editar = (EditText)dialog.findViewById(R.id.eteditar); editar.setText(itemValue); Button okBtn = (Button) dialog.findViewById(R.id.okbtn); Button borrarBtn = (Button) dialog.findViewById(R.id.borrarbtn); // if button is clicked, close the custom dialog okBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { String recuperado = editar.getText().toString(); al.set(itemPosition, recuperado); ArrayAdapter&lt;String&gt; adapter = new ArrayAdapter&lt;String&gt;(Iniciado.this, android.R.layout.simple_list_item_1, android.R.id.text1, al); adapter.notifyDataSetChanged(); dialog.dismiss(); } }); borrarBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { al.remove(itemPosition); adapter.notifyDataSetChanged(); dialog.dismiss(); } }); dialog.show(); } }); } private void conseguirdatos() { if(al.size() == 0){ al.add("C"); al.add("A"); al.add("E"); al.add("B"); al.add("D"); al.add("F"); al.add("C"); al.add("A"); al.add("E"); al.add("B"); al.add("D"); al.add("F"); al.add("C"); al.add("A"); al.add("E"); al.add("B"); al.add("D"); al.add("F"); al.add("C"); al.add("A"); al.add("E"); al.add("B"); al.add("D"); al.add("F"); } } } </code></pre>
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    1. USuser3052858
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    1. PO
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    2. PO
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    1. COsave it as xml then load into the arraylist..
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      1. USsubash
    2. COyou have to `persist` your data. :)
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      1. USnachokk
 

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