I searched a lot and tried things but the onActivityResult function isn't launched when the intent from which I try to get a string information is closed.
I use Visual Studio to write this application, this is my code :
The click event that opens the activity where users can type strings :
private void Btn_Valid_Click(object sender, EventArgs e)
{
----
Intent intent = new Intent(this, typeof(activity_OF_TransfertChxChmb));
StartActivityForResult(intent, 0);
----
}
The function in the openned Intent that should return the string information :
private void Validate()
{
string stringToPassBack = tb_Store.Text;
// put the String to pass back into an Intent and close this activity
Intent intent = new Intent();
intent.PutExtra("result", stringToPassBack);
SetResult(Result.Ok, intent);
Finish();
}
And the onActivityResult function that should be launched in the first activity:
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
base.onActivityResult(requestCode, 0, data);
if (requestCode == 0)
{
if (resultCode == -1) // Ok
{
string result = data.GetStringExtra("result");
}
if (resultCode == 0) // Canceled
{
//Write your code if there's no result
}
}
}
I am missing something, but can't figure out what.
Thank you for your help.
You are adding the extra via:
intent.PutExtra(Intent.ExtraText, stringToPassBack);
Your key is Intent.ExtraText.
You are retrieving the extra via:
string result = data.GetStringExtra("result");
Your key is "result".
So, perhaps Intent.ExtraText does not equal "result". You need to use the same key in both places.
Related
I have the following code
public void changeContentOnClick(View view) {
Intent intent = new Intent(this, ChangeNodeContentActivity.class);
intent.putExtra("SELECTED_NODE_ID", selectedNode.getNodeId());
intent.putExtra("SELECTED_NODE_CONTENT", selectedNode.getNodeContent());
startActivityForResult(intent,RESULT_OK);
Log.d(TAG, "Can I get here?");
onActivityResult(RESULT_OK, RESULT_OK, intent);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
try {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
String editedNodeId = data.getStringExtra("EDITED_NODE_ID");
String editedNodeContent = data.getStringExtra("EDITED_NODE_CONTENT");
Node nodeChecker = new Node(editedNodeId);
Node editedNode = new Node(editedNodeId, editedNodeContent);
Log.d(TAG, editedNode.toString());
nodes.set(nodes.indexOf(nodeChecker), editedNode);
adapter.notifyDataSetChanged();
}
} catch (Exception e) {
Toast.makeText(this, e.toString(), Toast.LENGTH_SHORT).show();
}
}
Somehow, after startActivityForResult method is called, everything stops. The log with message "Can I get here?" is never printed and I don't understand why not. I have followed the answer to this topic, but somehow couldn't make it work. Do I call the onActivityResult in the wrong way or place? Please help me out!
The that should send back some info from the ChangeNodeContentActivity and the one that handles the result code is the following on click listener:
public void changeContentOnClick(View view) {
Intent intent = getIntent();
selectedNode.setNodeContent(nodeContentDisplay.getText().toString());
intent.putExtra("EDITED_NODE_ID", selectedNode.getNodeId());
intent.putExtra("EDITED_NODE_CONTENT", selectedNode.getNodeContent());
setResult(RESULT_OK, intent);
Log.d(TAG, selectedNode.toString());
finish();
}
startActivityForResult() method receives an intent and requestCode, so you should change it to:
startActivityForResult(intent, REQUEST_CODE)
And onActivityResult() method is automatically called when returning from the activity, so you should remove the direct call you made to the method, i.e. onActivityResult(RESULT_OK, RESULT_OK, intent)
i have button which have attribute android:onClick="atnDuom".
There is that function
public void atnDuom(View view)
{
finish();
}
and there is onActivityResult function in the same activity.
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if (resultCode == RESULT_OK) {
DOP = new DatabaseOperations(ctx);
Intent returnIntent = new Intent();
user_name = data.getStringExtra("tarpVard");
user_lastname = data.getStringExtra("tarpPav");
institucijos_pavadinimas = data.getStringExtra("tarpInst");
padalinio_pavadinimas = data.getStringExtra("tarpPad");
pareigos = data.getStringExtra("tarpPar");
mob_tel = data.getStringExtra("tarpMob");
el_pastas = data.getStringExtra("tarpEl");
setResult(RESULT_OK,returnIntent);
DOP = new DatabaseOperations(ctx);
if(newVard.equals("")||newPav.equals("")||newInst.equals("")||newPad.equals("")||newPar.equals("")||newMob.equals("")||newEl.equals(""))
{
Toast.makeText(getBaseContext(), R.string.prashome, Toast.LENGTH_LONG).show();
}
else
{
DOP.updateUserInfo(DOP, user_name, user_lastname, institucijos_pavadinimas, padalinio_pavadinimas, pareigos, mob_tel, el_pastas, newVard, newPav, newInst, newPad, newPar, newMob, newEl);
Toast.makeText(getBaseContext(), "Duomenys atnaujinti", Toast.LENGTH_LONG).show();
finish();
}
}
}
}
It is possible to execute function onActivityResult whithout doing anything in atnDuom function?
Finish() close activity and onActivityResult doesnt work :)
You are using data from the intent, if you want to go to onActivityResult from atnDuom you will need to create a new Intent and push all the data needed
Intent newIntent = new Intent();
newIntent.putExtras(...);
onActivityResult(REQUEST_CODE, RESULT_OK, newIntent);
I have started Activity for result, but how to return string like parameter from that activity ?
just use following code block:
Intent intent=new Intent();
intent.putExtra("RESULT_STRING", string);
setResult(RESULT_OK, intent);
finish();
get value from this intent in onActivtyResult method in calling activity:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CREATE_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
//Use Data to get string
String string = data.getStringExtra("RESULT_STRING");
}
}
}
You just need to putExtra in the intent and the call setResult(),
Intent data = new Intent();
data.putExtra("myobj", value);
setResult(Activity.RESULT_OK, data);
The documentation says it all. You set the result by calling setResult and you read it in the onActivityResult method.
This question already has answers here:
How to pass a value from one Activity to another in Android? [duplicate]
(7 answers)
Closed 9 years ago.
In Activity1, I input some data like name and address. When I click the next button, there will be another input form. What I want to do is, when I click BACK, I will return to Activity1 and the data I entered there previously is shown.
HELP please :)
=============
UPDATED: Activity1
private void startActivityForResult()
{
TextView textname = (TextView) findViewById(R.id.username);
TextView textaddress = (TextView) findViewById(R.id.useraddress);
Intent intent = new Intent(this, GetInformation.class);
//intent.putExtras(getIntent());
intent.putExtra("username", textname.getText().toString());
intent.putExtra("useradd", textaddress.getText().toString());
startActivityForResult(intent, 0);
}
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
TextView textname = (TextView) findViewById(R.id.username);
TextView textaddress = (TextView) findViewById(R.id.useraddress);
textname.setText(data.getStringExtra("returnname").toString());
textaddress.setText(data.getStringExtra("returnadd").toString());
}
Activity2
private void startActivityForResult()
{
final String username;
final String useraddress;
Intent intent = getIntent();
//intent.putExtras(getIntent());
username = getIntent().getStringExtra("username");
useraddress = getIntent().getStringExtra("useradd");
intent.putExtra("returnname", username);
intent.putExtra("returnadd", useraddress);
setResult(0, intent);
}
There's a simple way to do this in Android : startActivityForResult. Basically, when you launch the activity, you say that you are expecting a result. The other activity can then add information that will be returned to the starting activity. Here's a very simple code sample from the official doc :
public class MyActivity extends Activity {
...
static final int PICK_CONTACT_REQUEST = 0;
protected boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
// When the user center presses, let them pick a contact.
startActivityForResult(
new Intent(Intent.ACTION_PICK,
new Uri("content://contacts")),
PICK_CONTACT_REQUEST);
return true;
}
return false;
}
protected void onActivityResult(int requestCode, int resultCode,
Intent data) {
if (requestCode == PICK_CONTACT_REQUEST) {
if (resultCode == RESULT_OK) {
// A contact was picked. Here we will just display it
// to the user.
startActivity(new Intent(Intent.ACTION_VIEW, data));
}
}
}
}
You can get a much more complete description of all this on the Activity page in the official doc (section Starting Activities and Getting Results).
Save Activity1 state in method onSaveInstanceState, and then in method
void onCreate(Bundle savedInstanceState)
you can restore state, using savedInstanceState.
Or, if you want pass entered data to second activity, you can place data in intent.
Sample:
Intent i = new Intent(FirstActivity.this, SecondActivity.class);
i.putExtra("Key", "Value");
startActivityForResult(i, 0);
in Second Activity you can get data:
getIntent().getStringExtra("Key");
To return result from second activity:
Intent data = new Intent();
data.put("key", "value");
setResult(RESULT_OK, data);
then you can retrieve data in first activity using
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
data.getStringExtra("key");
}
I have this code:
Intent intent = new Intent();
intent.setAction(Intent.ACTION_PICK);
intent.setData(ContactsContract.Contacts.CONTENT_URI);
intent.putExtra(EXTRA_ONLINE_ID, (String) v.getTag());
startActivityForResult(intent, PICK_CONTACT);
Then on response:
public void onActivityResult(int reqCode, int resultCode, Intent data) {
switch (reqCode) {
case (PICK_CONTACT):
if (resultCode == Activity.RESULT_OK) {
try {
Uri contactData = data.getData();
String onlineid = data.getStringExtra(EXTRA_ONLINE_ID);
} catch (Exception e) {
e.printStackTrace();
}
}
break;
}
super.onActivityResult(reqCode, resultCode, data);
}
the onlineid variable is null. How can I pass a value and then to receive it back?
EDIT
I even tried,
Bundle extras = data.getExtras(); // returns null
This is done by design; system activities will not send back the extras with which they're called, so you have to manage the data elsewhere.
Luckily, the resultCode parameter is fully controlled by yourself, which means that you can use it to index your data.
private final int PICK_CONTACT = 0;
private Bundle[] myDataTransfer = { null };
...
Bundle myData = new Bundle();
myData.putString(EXTRA_ONLINE_ID, (String) v.getTag());
myDataTransfer[PICK_CONTACT] = myData;
// create intent and all
startActivityForResult(intent, PICK_CONTACT);
...
public void onActivityResult(int reqCode, int resultCode, Intent data) {
if (resultCode == PICK_CONTACT) {
Bundle myData = myDataTransfer[resultCode];
String onlineid = myData.getString(EXTRA_ONLINE_ID);
}
}
I'm not a Java programmer, there must be a nicer way to implement a map of Bundles, but this works :)
ok Check if your Activity android:launchMode is configured as SingleTask or SingleInstance! that must be the problem :)
The EXTRA_ONLINE_ID field will have to be set in the activity that you launched using setResult. If it's not setting that value in the returned Intent (which is different from what you sent) then you will get a null value.
I was running into some problems with this as well.
Instead of this line
intent.putExtra(EXTRA_ONLINE_ID, (String) v.getTag());
Try
intent.putExtra(EXTRA_ONLINE_ID, "" + v.getTag());