I know this question has been asked many times and i followed all the steps correctly but still getting null data in my FirstApplication
FirstApplication starting an intent to get result from a library class using Mainactivity that is initialised using the activity variable in a constructor:
sendIntent.putExtra("data", bundle);
sendIntent.setType("text/plain");
sendIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
if (sendIntent.resolveActivity(context.getPackageManager()) != null) {
activity.startActivityForResult(sendIntent, requestCode);
}
SecondApplication getting the intent and doing necessary operation
Intent intent = getIntent();
Bundle bundle = intent.getBundleExtra("data");
if (bundle!=null){
type = bundle.getString("type");
num1 = Integer.parseInt(bundle.getString("num1"));
num2 = Integer.parseInt(bundle.getString("num2"));
if (type.equalsIgnoreCase("add")){
result = String.valueOf(num1+num2);
}else {
result = String.valueOf(num1-num2);
}
}
Sending result to FirstApplication
Bundle bundle1 = new Bundle();
if (bundle1!=null){
Intent send = new Intent();
bundle1.putString("result", result);
send.putExtra("datasend", bundle1);
setResult(Activity.RESULT_OK, send);
finish();
}
Receiving result in FirstApplication MAinActivity
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
Bundle bundle = data.getBundleExtra("datasend");
result = bundle.getString("result");
}
} else {
super.onActivityResult(requestCode, resultCode, data);
}
}
But here i am receiving resultCode 0 and data null. Any help will be appreciated. Thank you.
The problem is in this line
sendIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
By calling Intent.FLAG_ACTIVITY_NEW_TASK you are setting the second activity on the top of the back stack and cancelling the effect of startActivityForResult()
So it should be removed to get back the result
Related
I have four activities:
Activity A
private void addCard() {
Intent intent = new Intent(MainActivity.this, GetNumberActivity.class);
startActivityForResult(intent, REQUEST_CODE_CREATE);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_CREATE) {
if (resultCode == RESULT_OK) {
if (data.hasExtra("data")) {
// Card has been create
Toast.makeText(getApplication(), "Karata została wygenerowana.", Toast.LENGTH_SHORT).show();
}
}
}
}
Activity B
Intent intent = new Intent(GetNumberActivity.this, ScanQrCodeActivity.class);
intent.putExtra(EXTRA_MESSAGE, uunitValue);
startActivityForResult(intent, REQUEST_CODE);
Then in the second activity I have to pass data to the third activity.
Activity C
Card card = new Card(path3, base32, nameCard, intervalTotp, passwordHotp, getDate(), expirationDate, hotpValue);
Intent intent = new Intent(ScanQrCodeActivity.this, Stage3Activity.class);
intent.putExtra("card", card);
startActivity(intent);
finish();
Activity D
Intent data = new Intent(Stage3Activity.this,MainActivity.class);
data.putExtra("data", card);
startActivityForResult(data, RESULT_OK);
When I press the button on Activity A, the Toast is not shown.
You need to update your code as follow
if (resultCode == RESULT_OK) {
if (requestCode == REQUEST_CODE_CREATE) {
if (data.hasExtra("data")) {
// Card has been create
Toast.makeText(getApplication(), "Karata została wygenerowana.", Toast.LENGTH_SHORT).show();
}
}
}
First check for RESULT_OK and then proceed further
Happy Coding!
Replace getApplication() with this (the context of the current activity)
Toast.makeText(this.class, "Karata została wygenerowana.", Toast.LENGTH_SHORT).show();
Use getApplicationContext() instead of getApplication() in your makeText() method
I am making a music player application, and I am trying to implement playlists. I have a file chooser in another intent, and I would like the ListView in the mainActivity to update when the file chooser intent closes. how can I call my UpdateListView method when it closes?
start intent:
Intent intent = new Intent(this, FileChooser.class);
startActivity(intent);
Closing intent
public void closeButton(View view){
finish();
}
Any help would be appreciated! thanks!
I assume you are using your own FileChoser class, not a standard Android one:
private static final int FileChooserRequestCode = 666;
Intent intent = new Intent(this, FileChooser.class);
startActivityForResult(intent, FileChooserRequestCode);
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == FillChooserRequestCode) {
if (resultCode == Activity.RESULT_OK) {
// ... file is chosen
String fileName = data.getStringExtra("FileName");
} else {
... dialog is closed
}
}
}
in FileChoser you do
Intent intent = new Intent();
intent.putStringExtra("FileName", fileName);
SetResult(Activity.RESULT_OK, intent);
finish();
and
SetResult(Activity.RESULT_CANCELED);
finish();
You can use startActivityForResult() please refer the link Getting Results From Activity
static final int FILE_CHOOSER_INTENT = 1; // The request code
...
private void chooseFile() {
Intent intent = new Intent(this, FileChooser.class);
startActivityForResult(intent, FILE_CHOOSER_INTENT);
}
Call setResult pass your result data as Intent. for details refer link SetResult function
Override this in your calling activity
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// Check which request we're responding to
if (requestCode == FILE_CHOOSER_INTENT) {
// Make sure the request was successful
if (resultCode == RESULT_OK) {
// The user picked a contact.
// The Intent's data Uri identifies which contact was selected.
// Do something with the contact here (bigger example below)
}
}
}
I have a button in Fragment when I press it I open a new activity for result but When I return back to my fragment I found all UI element = null
Please find the code
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(getActivity(), MyActivity.class);
getActivity().startActivityForResult(intent, "3030");
}
});
when choose a value from activity I should back to fragment and set data to textview in the activity.
Intent intent = Activity.this.getIntent();
intent.putExtra("categoryId", id);
intent.putExtra("categoryName", name);
setResult(RESULT_OK, intent);
finish();
and I have put that in the activity that contains the fragment
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 3030 && resultCode == RESULT_OK) {
Fragment fragment = mTabFragments.get(MyFragment.class.getName());
if (fragment != null) {
fragment.onActivityResult(requestCode, resultCode, data);
}
}
}
and in fragment
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 3030 && resultCode == Activity.RESULT_OK) {
int categoryId = data.getIntExtra("categoryId", 0);
String categoryName = data.getStringExtra("categoryName");
mChooseCategoryTextView.setText(categoryName);
}
}
the problem now that mChooseCategoryTextView is null
Can anyone tell me what is the problem?
To get result in fragment
startActivityForResult(intent,REQ_CODE);
not
getActivity().startActivityForResult(intent,REQ_CODE);
I think the question how you initialise this view?
Since your lunching another activity so your whole fragment my be reconstruct or only onViewCreated recalled again.
So my guess is that you don't reinitialize or override mChooseCategoryTextView reference in one of fragment callbacks.
Try to add more logs and check what's happening for this reference
I believe the error is in the line
Fragment fragment = mTabFragments.get(MyFragment.class.getName());
I assume mTabFragments in an adapter of some sort? I'd have to look at it's code to be sure, but it sounds like it's not returning the right fragment. Make sure that the reference it's returning is the same as the fragment that is being shown on screen.
I've got a problem I don't know how to solve.
This is my code of the MainActivity.java which starts a new activity:
Intent intent = new Intent(this, AssociationActivity.class);
intent.putExtra("data", json);
startActivityForResult(intent, 0);
Additionaly, I have the following onActivityResult()-method:
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
System.out.print("works outside!");
if (requestCode == 1) {
if(resultCode == RESULT_OK){
System.out.print("works inside!");
}
if (resultCode == RESULT_CANCELED) {
}
}
}
And this is where the result should be sent to the MainActivity:
Intent returnIntent = new Intent();
returnIntent.putExtra("result", string);
setResult(RESULT_OK, returnIntent);
finish();
It seems that the onActivityResult() doesn't even get called as I don't have any output on the console.
In the AndroidManifest.xml I neither use the singleIntent nor the noHistory parameter.
Any suggestions why it doesn't work?
requestCode change from 1 to 0. as shown below
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
System.out.print("works outside!");
if (requestCode == 0) {
if(resultCode == RESULT_OK){
System.out.print("works inside!");
}
if (resultCode == RESULT_CANCELED) {
}
}
}
Okay, I found the issue, the wasn't any issue at all, I replaced the System.out statements with the Log from Android it's working all the time, Android just delayed the System.out, but I don't know why.
Thanks #Rene Juuse for that tip!
I have 2 activities in my application, Activity1 and Activity2.When the app launches Acitivity1 is the the one that is called.Clicking on a button in Activity1 should take you to Activity2.
In Acivity2,some data processing is done then i send back data to Activity1 using an intent like this:
Intent in=new Intent(getApplicationContext(), Activity1.class);
in.putExtra("data", data);
startActivity(in);
Then getting back to Activity1 i obtain the intent data:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity1);
String data =(getIntent().getExtras().getString("data"));
The problem here is that the first time the app launches it checks for the intent data and it does not exist so i get the nullpointerexception error.how can i make sure it checks for the intent data when Activity2 is the previous class?
You can check if the intent is existing using:
getIntent().hasExtra("data");
This will return you a boolean.
Also if oyu want to return some datas to the first activity, your should start the second one with startActivityForResult
if (extras != null) {
if (extras.containsKey("data")) {
boolean hasData = extras.getBoolean("data", false);
// TODO: Do something with the value of "data".
}
}
put a check over it
if(getIntent().getExtras()!=null){
String data =(getIntent().getExtras().getString("data"));
}
Follow the following steps
1: from your activity1's button click call as follow
Intent i = new Intent(this, SecondActivity.class);
startActivityForResult(i, 1);
2: In your Activity2 set the data which you want to return back to Activity1 as follow and if you don't want to return back don't set anything.
Intent returnIntent = new Intent();
returnIntent.putExtra("result",result);
setResult(RESULT_OK,returnIntent);
finish();
if you don't want to return data:
Intent returnIntent = new Intent();
setResult(RESULT_CANCELED, returnIntent);
finish();
3: now again in your Activity1 handle the return data as follow
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
if(resultCode == RESULT_OK){
String result=data.getStringExtra("result");
}
if (resultCode == RESULT_CANCELED) {
//Write your code if there's no result
}
}
}
EDIT:
and if you strictly want to use your own method as in your question try this:
in your Activity1 you obtain the intent data as:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity1);
String data ="default value";
try{
data =(getIntent().getExtras().getString("data"));
}catch(Exception e){
}
}
use ActvityForResult.
replace these codes.
in ACTVITY1:
put this after onCreate:
#Override
protected void onActivityResult(int requestCode ,int resultCode ,Intent data ) {
super.onActivityResult(requestCode, resultCode, data);
String name =data.getStringExtra("data");
if(resultCode == RESULT_OK){
switch(requestCode){
case 2:
if(resultCode == RESULT_OK){
Toast.makeText(this, name, Toast.LENGTH_LONG).show();
}
}
}
in ACTIVITY2:
Intent intent=new Intent();
intent.putExtra("data",data);
setResult(2,intent);
finish();