In first activity, there is empty ListView and Button.
When I press button, it starts second activity that has ListView of categories.
After I click into one of listElements it will start third activity that has ListView with elements that are belong to my chosen category.
When I choose element of third ListView it must send me back to first activity, where my chosen element is added to my empty ListView
Use Intent.FLAG_ACTIVITY_FORWARD_RESULT like this:
FirstActivity should start SecondActivity using startActivityForResult().
SecondActivity should start ThirdActivity using this:
Intent intent = new Intent(this, ThirdActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
startActivity(intent);
finish();
This tells ThirdActivity that it should return a result to FirstActivity.
ThirdActivity should return the result using
setResult(RESULT_OK, data);
finish();
At that point, FirstActivity.onActivityResult() will be called with the data returned from ThirdActivity.
Though I'd implore you to change your architecture design, it is possible to do it like this:
File ActivityOne.java
...
startActivityForResult(new Intent(this, ActivityTwo.class), 2);
...
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode == RESULT_OK && data != null) {
//Collect extras from the 'data' object
}
}
...
File ActivityTwo.java
...
startActivityForResult(new Intent(this, ActivityTwo.class), 3);
...
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode == RESULT_OK && data != null) {
setResult(resultCode, data);
finish();
}
setResult(RESULT_CANCELLED);
}
...
File ActivityThree.java
...
//Fill the Intent resultData with the data you need in the first activity
setResult(RESULT_OK, resultData);
finish();
...
Related
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 am currently trying to send data from a child activity back to its parent activity. I have used the startActivityForResult() to go to my child activity. However I cannot understand what I would do to put the data I want to put back to my intent and make my parent activity receive it. I have been looking at different examples online but I think it is only throwing the result variable.
As per my understanding this is what I used when I return my child activity back to the parent activity:
String somestring = "somevalue";
Intent i = getIntent();
setResult(RESULT_OK, i);
finish();
I want to load the content of the string somestring for it to return back to the parent activity.
How can I load it back to my parent activity?
startActivityForResult(intent, 1);
And lastly how can I capture the data in my parent activity in the onActivityResult?
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data){
super.onActivityResult(requestCode,resultCode,data);
}
Add your data to an intent, just as you would in any other situation:
Intent intent=new Intent();
intent.putExtra("ComingFrom", "Hello");
setResult(RESULT_OK, intent);
finish();
Then retrieve it in onActivityResult in your other activity.
#Override
public void onActivityResult(int requestCode,int resultCode,Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
String extraData=data.getStringExtra("ComingFrom"));
}
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();
I have a main activity that calls another(2nd) activity "VennDiagram"
Intent intent = new Intent(getApplicationContext(), VennDiagram.class);
startActivityForResult(intent, 200);
the 2nd activity after doing some calculations calls a 3rd activity "ImageMapTest...." acitvity
Intent i = new Intent(getApplicationContext(), ImageMapTestActivity.class);
i.putExtras(sendBundle);
startActivity(i);
//finish();
Now I need help to return the an arrayList from the 3rd activity to the first ??!!
Intent in = new Intent(getApplicationContext(), AndroidClientActivity.class);
in.putExtra("songList", playList);
setResult(200, in);
finish();
I do have an intent listener as below at my 1st activity, but its just that the 3rd activity won't send it back to it
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode == 100 || resultCode == 200)
{
}
P.S I did read couple of similar posts but they were not what I was looking for...
You should be able to just send the result received by B from C back to A.
protected void onActivityResult(int requestCode,int resultCode, Intent data) {
super.onActivityResult(requestCode, data);
setResult(resultCode,resultData);
finish();
}
Finish C and return your array to B, and then when you return to B finish and return the result back to A.