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POReturning Data Result to Parent Activity using Intents
 

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    <p>I am able to successfully transfer the string in my <code>ListView</code> in my first Activity to the <code>EditText</code> in my second Activity. I now want to edit the text and send it back to update my <code>ListView</code> in my first Activity. I basically want to have the edits be sent back to the first activity as a popup to help me test which string is being passed back</p> <p>I'm not sure what Intent to put in my <code>onActivityResult()</code>:</p> <pre><code>protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == RESULT_OK &amp;&amp; requestCode == REQUEST_CODE) { String name = data.getExtras().getString("name"); Toast.makeText(this, name, Toast.LENGTH_SHORT).show(); } } </code></pre> <p>Here is my first Activity:</p> <pre><code> public class ToDoActivity extends Activity { private ArrayList&lt;String&gt; todoItems; private ArrayAdapter&lt;String&gt; todoAdapter; // declare array adapter which will translate the piece of data to teh view private ListView lvItems; // attach to list view private EditText etNewItem; private final int REQUEST_CODE = 20; //private Intent i; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_to_do); etNewItem = (EditText) findViewById(R.id.etNewItem); lvItems = (ListView) findViewById(R.id.lvItems); // now we have access to ListView //populateArrayItems(); // call function readItems(); // read items from file todoAdapter = new ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_list_item_1, todoItems); //create adapter lvItems.setAdapter(todoAdapter); // populate listview using the adapter //todoAdapter.add("item 4"); setupListViewListener(); setupEditItemListener(); onActivityResult(REQUEST_CODE, RESULT_OK, /** Intent variable **/); } private void launchEditItem(String item) { Intent i = new Intent(this, EditItemActivity.class); i.putExtra("itemOnList", item); // list item into edit text //startActivityForResult(i, REQUEST_CODE); startActivity(i); } private void setupEditItemListener() { // on click, run this function to display edit page lvItems.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView&lt;?&gt; adapter, View item, int pos, long id) { String text = (String) lvItems.getItemAtPosition(pos); launchEditItem(text); } }); } private void setupListViewListener() { lvItems.setOnItemLongClickListener(new OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView&lt;?&gt; adapter, View item, int pos, long id) { todoItems.remove(pos); todoAdapter.notifyDataSetChanged(); // has adapter look back at the array list and refresh it's data and repopulate the view writeItems(); return true; } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.to_do, menu); return true; } public void onAddedItem(View v) { String itemText = etNewItem.getText().toString(); todoAdapter.add(itemText); // add to adapter etNewItem.setText(""); //clear edit text writeItems(); //each time to add item, you want to write to file to memorize } private void readItems() { File filesDir = getFilesDir(); //return path where files can be created for android File todoFile = new File(filesDir, "todo.txt"); try { todoItems = new ArrayList&lt;String&gt;(FileUtils.readLines(todoFile)); //populate with read }catch (IOException e) { // if files doesn't exist todoItems = new ArrayList&lt;String&gt;(); } } private void writeItems() { File filesDir = getFilesDir(); //return path where files can be created for android File todoFile = new File(filesDir, "todo.txt"); try { FileUtils.writeLines(todoFile, todoItems); // pass todoItems to todoFile } catch (IOException e) { e.printStackTrace(); } } protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (resultCode == RESULT_OK &amp;&amp; requestCode == REQUEST_CODE) { String name = data.getExtras().getString("name"); Toast.makeText(this, name, Toast.LENGTH_SHORT).show(); } } } </code></pre> <p>I thought about using the <code>Intent</code> from the second activity but I'm not sure how to do so.</p> <p>Here is my second Activity.</p> <pre><code>public class EditItemActivity extends Activity { private EditText etEditItem; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_edit_item); Intent i = getIntent(); String ItemToEdit = i.getStringExtra("itemOnList"); etEditItem = (EditText)findViewById(R.id.etEditItem); etEditItem.setText(ItemToEdit); onSubmit(etEditItem); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.edit_item, menu); return true; } public void DoneEdit(View v) { this.finish(); } public void onSubmit(View v) { EditText etName = (EditText) findViewById(R.id.etEditItem); Intent data = new Intent(); data.putExtra("EditedItem", etName.getText().toString()); setResult(RESULT_OK, data); finish(); } } </code></pre>
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    1. CONow I must admit I did not read you code very carefully but is this not simply A - send text -> B (you managed this already) and then start a new A activity as dialog B - send text -> A ? Otherwise, if it is a finite set of texts that you want to do this for, then I would suggest using SharedPreferences to store and retrieve it, which makes the situation much simpler in my opinion. Then you save it once and get it in anywhere with a context.
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    2. COyou need `startActivityForResult(i, REQUEST_CODE);` which is commented out.. any reason for that?
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      1. USAmulya Khare
    3. COUm i think so. I'm still learning android dev so I'm not sure if starting a new `Intent` from B to A is the way to go but yes. Step 1 A -send text-> B. Step 2 edit text in EditText. Step 3 send edited text from B back to A
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      1. USLiondancer
 

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