Android :: Passing Values From One Activity To Another
Feb 11, 2010
I have an app which makes use of several layout-views. Every layout - view also got a class for it, which extend the Activity class. One class for example retrieves some database values whilst offering a search form to the user. Afterwards the user can select one of those values and he gets presented with another screen which gives similar options as the one selected. Anyways, I'd like for the first Activity to be able to send an array with data (Strings for example) to the second one. Right now I show an activity by using:
Intent i = new Intent(this, activitysName.class); startActivity(i);
I have no idea whilst using this construction how I can "initialize" the new object with the String array I want to pass to it. So how should this be achieved ? Should I be using something else instead of an Intent-Activity combination ?
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Nov 20, 2010
I have a need where I must pass some values from an Activity to another file which extends View class (instead of Activity). Its not the normal passing of values from one activity to another. In my Activity, I will pass some co-ordinate values to the class that extends View. In this class, I will draw an image and place points over the image on the required co-ordinates. But, the problem is, I cant send values using Intent.
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Nov 17, 2010
I have searched and searched and I just can't get this code to work. I have a main.xml layout and a setting.xml. I have some values I would like the Settings.class to change in my main apps class.Three string to be exact. I have tried this simple test code in my main app class.
settings.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
Intent intent = new Intent(v.getContext(), Settings.class);
startActivityForResult(intent, 0);}});
//Then a function
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent){
super.onActivityResult(requestCode, resultCode, intent);
Bundle extras = intent.getExtras();
String value = extras.getString("myKey");
if(value!=null){
Log.d("hmmm",value);}}}
In my settings.class I have the following
returnHome.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.putExtra("myKey", "YEAH");
setResult(RESULT_OK, intent);
finish();}});
Back in main app class it is not getting logged. Like I said I have three string in the main class that I want settings class to change and send back.
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Dec 9, 2009
I'm having a problem in calling .net c# web services from android using ksoap2. The call is executed just fine without parameters, but when I pass parameters of any type, the web service just receives a null value. I tried everything possible but no luck so far. I hope someone can help, The client side code is:
public static boolean temp(){try {
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME_TEMP);
PopertyInfo p = new PropertyInfo();
p.type = PropertyInfo.INTEGER_CLASS;
p.setName("num");
p.setValue(5);
p.setNamespace(NAMESPACE);
request.addProperty(p);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope (SoapEnvelope.VER11 );
envelope.dotNet = true;
envelope.encodingStyle = SoapSerializationEnvelope.ENC;
envelope.setOutputSoapObject(request);
AndroidHttpTransport androidHttpTransport = new AndroidHttpTransport (URL);
androidHttpTransport.setXmlVersionTag("<?xml version= "1.0" encoding="UTF-8"?>")
androidHttpTransport.call(SOAP_ACTION_TEMP, envelope); ....
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Jul 21, 2010
I am new to android applications, I am using Ksoap2 to access .Net webservice and The call is executed just fine without parameters. But with parameters I am getting Empty. I followed all the steps provided in sites. I tried everything possible but no luck so far.
private static final String SOAP_ACTION = "http://www.agilelearning.com/GetProvincelist1";
private static final String METHOD_NAME = "GetProvincelist1 ";
private static final String NAMESPACE = "http://www.agilelearning.com" ;
private static final String URL = "http://192.168.1.24/Service.asmx";
//Method executed when Province is selected
private OnItemSelectedListener selectListener = new OnItemSelectedListener(){
public void onItemSelected(AdapterView parent, View v, int position, long id){
try{
ArrayList districts=new ArrayList();
int Provinceid=position+1;//parent.getItemAtPosition(position).toString();
SoapObject request1 = new SoapObject(NAMESPACE, METHOD_NAME1);
request1.addProperty("Provincename","East Province");
SoapSerializationEnvelope envelope1 = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope1.dotNet = true;
envelope1.setOutputSoapObject(request1);
HttpTransportSE at = new HttpTransportSE(URL);
at.debug = true;
at.setXmlVersionTag("");
at.call(SOAP_ACTION1, envelope1);
SoapObject rs = (SoapObject)envelope1.getResponse();
int count=rs.getPropertyCount();
for(int i=0;i aa;
aa = new ArrayAdapter(home1.this, android.R.layout.simple_spinner_item, districts); aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sd.setAdapter(aa);
}catch(Exception ex){
MessageBox("No Districts found");}}
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May 16, 2010
I'm writing an application that starts with a loading activity. In the loading activity the app requests html from web and parses the html, then it sends the parsing result to the main activity. The main activity has several tabs, and contents of these tabs are based on the result of parsing.For example, the result of parsing is a list of strings ["apple", "banana", "orange"], and I need to pass this list to main activity, so that the main activity can create three tabs named after three fruits.I would like to know if there is any way to pass a list of strings among activities, BTW, is it the common way of do this?
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Jun 2, 2010
first.java String[] items={"one","two"}; Bundle map = new Bundle(); map.putStringArray ("link",items); Intent myintent = new Intent(view.getContext(),two.class); myintent. put Extras (map) ;startActivityForResult(myintent,0); second.java Bundle map=this. get Intent() .getExtras(); String links=map.getString("link"); tell me that how can i get the two string values from one activity to another one. such as links[0]="one"; and links[1] ="two";
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Jun 7, 2010
I have a Bitmap image and i want to forward the bitmap to another activity. I have two activities Activity A and Activity B. This is how I started the Activity B
startActivityForResult(new Intent(Activity A.this, Activity B.class), 120);
in activity B
private void forwardImage(Bitmap bit) {
Intent i = new Intent(MMS.this, Compose.class);
i.putExtra("MMS", bit);
setResult(RESULT_OK, i);
finish(); }
This is not forwarding to Activity A but if I put a String to the intent it'll forward. This is how I listen to result in Activity A
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
// super.onActivityResult(requestCode, resultCode, data);
switch (resultCode)
case RESULT_OK: Intent intent = getIntent();
Bitmap bitmap = (Bitmap) intent.getParcelableExtra("MMS");
mmsImage.setImageBitmap(bitmap);
default: break;
} }
How can I pass a bitmap.
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Mar 2, 2009
I'm programming an Activity that launches a second one through startActivity just like in the Forwarding example. The main difference is that I'd like to pass some data to the second Activity when starting it, for example an item selected in a list owned by the first Activity. I can't find how to do that. Am I missing something? I guess I do.
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Jun 14, 2010
I have a ListView that shows a list of names. When you select a name, I want to pass the selected person' ID to the next view (Profile) and retreieve their data based on their ID. I am able to load the Profile View, but do not know how to pass the ID from the ListView to the Profile. Here is how I am loading the Profile: Code...
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Feb 28, 2010
For a rather crazy reason I am trying to pass a linear Layout from one activity to another. Should I use an intent extra for this? What would be the right way to create a Linear Layout in one activity and then spawn a new activity using that linear Layout.
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Apr 1, 2009
I need to pass a 2 dimensional array to an ACTIVITY from a SERVICE. How can I achieve this in minimum number of statements (as in avoiding putExtras for each and every string stored in the array)?
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Sep 19, 2010
So I'm getting really confused on how to do this whole thing and I was hoping someone could break it down for me a little bit.I have a service that should always be running, and at certain times it needs to alert the user that a task is to be completed(probably through a notification bar icon). When the user accepts the task, the service needs to look into the local database, construct some non primitive objects, and give them to the activity that it just started.I have looked all over and gotten very confused as to a proper approach so I have a few questions to help me wrap my head around it.If an activity creates a local SQLite database can the service and activities of that application access that same database later?Does the service and activity need to be in the same or separate packages? I would think no but for some reason I remember seeing something about this elsewhere.
How would I do the data transmission from the service to the activity? I was thinking a content provider but it seems like there should be an easier way for the service to just hand off the data. Similar to an Intent but for non primitives.
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Apr 4, 2009
I'm trying to create an activity which would be on top of other activities (a small dialog themed activity) and I want to get ALL key events to be ignored by my activity and handled normally by the activity beneath it. When I say all I mean the send, end and back keys too. Is this possible?I've tried setFocusable(false), setting the flag FLAG_NOT_FOCUSABLE, and adding a dummy onKeyListener but nothing doesn't seem to do the trick.
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Apr 7, 2009
I am developing an image applications.
One activity decoding image file (jpg, bmp, and so on) to byte buffer RGB 565 or 888 type.
Then want to pass image buffer to another activity for change image data.
I have 3 activity the main decoding activity[A] and selecting effect activity[B] and apply effect activity[C] for change image data.
If i use intent then activity[A] should make intent[1] and putExtra to that intent. and then [B] call getIntent and getByteArrayExtra for get byte buffer.
If user select effect then [B] make new intent[2] and putExtra to intent[2]. and startActivityForResult with intent[2] and activity[C].
Then activity[C] call getIntent to get intent[2] and getByteArrayExtra for get byte buffer again.
There takes much times to make new byte buffer and copy from parent's activity's byte buffer 2 times. [A]->[B] and [B]->[C]
That process drops application performance.
Questions
1. Can i pass intent[1] to activity[C] without make new intent[2] and putExtra byte buffer? by modify intent[1]. (if it works just 1 buffer copy will perform)
2. Can i use application global memory for share byte buffer? if i use hash map how can each activity access same hash map? (if it works don't need to copy buffer)
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Jul 23, 2010
I have two activities:
"a" that spawns thread for generating a dynamic array of values inside public void run() function.
"b", graphics activity that will help me draw rectangular pulses based on array values calculated in activity "a" (calculated in a's thread to be precise).
When I am in thread inside "a", how do I pass values of array to activity "b" and
call activity as well.
activity A
CODE:..........
activity B
CODE:..............
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Nov 6, 2010
I'm new to Android, and event driven code in general. Rather than embed loads of anonymous event listener classes in my Activity to handle onClick events etc, I defined separate classes to keep the code clean. Then I use them e.g. like this
myButton.setOnClickListener(new MyEventListener());
So, when 'myButton' gets clicked, MyEventListener's onClick method does some stuff.
I wanted to know the best practice for
a) accessing things in my Activity from the event listener. For example to change the text of a label. The onClick event takes a View in, but this is the view for the button that's been clicked, so if the label is NOT a child of my button, I can't use findViewById to get a handle to it. I've modified the constructor to pass in a reference to the label, so that the event has a handle to it but not sure if this is the most elegant way of doing it.
b) Passing information back e.g. when my event fires, I might want to disable some EditText fields. I'm thinking the proper way to do this is probably to dispatch another event from my event listener, that the Activity listens for, and when it sees the event, disables the fields in question. Is that the way to do it in Android?
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Mar 30, 2009
How do you pass an intent from a service to a new activity launched from a main activity? There's a passextra( intent src ); but I don't think thats what I am looking for?
activity main > start service( intent wuteverserviceintent );
activity main > start activity( intent newactivityintent );
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Sep 21, 2009
So I read through the SDK docs and I thought that calling a new activity(browser) as part of a task (myTask) will mean that activity* (browser) will close when a user closes the task (myTask) But I am left with a browser window.
Here is my scenario (in sudo code);
CODE:..........
Question 1: What is the cleanest way to ensure that when a user closes my app, any outside activities called will be closed to.
Question 2: Does a callback URl start a new Task, or use one in the stack if available?
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May 20, 2010
I am trying to create app widget.In this widget I have added one image button.If i click on this button i should pass list of object to next activity.Before passing this list to activity I am converting it to parceable list and adding it to bunddle and puting that bundle to intent.This logic is working fine in android 1.6, but this is not working in Android 2.1.In android 2.1.I am getting Null pointer excepion when I try to access this list in next activity.To solve this problem I tried to pass only String data through bundle,in next activity String is displaying properly,but when I try to pass list,then only i am not getting list in next activity.
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Jun 23, 2010
I am trying to display a dialog box in a simple Java class that is called from my main Activity but not successful. Please help me to figure it out.
I am passing the required values as parametrs.
I have two class: class MainActivity extends Activity :: Main *starting point *of Application class ShowMyDialog :: a simple java program In which I *generate an URl* and *display a dialog with WebView*.
I am passing the Acitivity from my MainActivity to this class as a parameter in function.
But I am *unable to call* the onCreateDialog method that I have *defined in the simple java class.
However, If I define the *onCreateDialog method in MainActivity, I am able to display it successfully.
What Should I pass as Parameter to the non Activity class from MainActivity class so that I am able to display the dialog as defined by showdialog method in JAVA class ???*
My steps of source code is as follow:
code:.........................
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May 31, 2010
How can i pass values of one activity to another?
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Sep 30, 2010
How do you set/pass values from one screen (activity) to another? What I have in the R.layout.main view labeled Calculator contains the code for doing calculations. The main.xml contains the layout (view) of the main screen. I have created an options menu which has another screen which shows you setup (R.layout.setup). The dialogsetup.xml contains the layout (view) for it.
When you press the menu button, you get the options menu. If you select "Setup", then it will display the setup screen. Now what I need to do is take the values from the setup screen (radio button and text values) and place them in the main screen so that when you exit the setup screen and go back to the main screen, you can take those values and use them in your main code.
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Jul 14, 2009
Can any one tell me how to pass the value from one screen to its previous screen. Consider the case.i m having two screen first screen with one Textview and button and the second activity have one edittext and button. If i click the first button then it has to move to second activity and here user has to type something in the textbox. If he press the button from the second screen then the values from the textbox should move to the first activity and that should be displayed in the first activity textview.
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Oct 19, 2010
I have an application which has 2 screens. When a value is changed in the second screen and when the first screen is called, the value must be updated on the button of first screen.
But I am not able to update the value on any of the widget of first screen. But I am able to see that I am getting the value, But when it comes to updating the same on button it does not happen.
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Jul 15, 2010
onCreate, MyActivity will display five TextViews. After you touch one of the five TextViews, it will hide three to four TextViews and color one red and one green or just color one green.
I can code everything up to here. But how can I pause for a few seconds and then repopulate the five TextViews with new values, unhide them and make them all white?
I tried a Timer in a new project and can attach the code and make my question less vague.
Here is the main.xml
CODE:................
Here is the TestTimer.java
CODE:.....
The issue is that the Timer executes resetAndContinue and logs two entries, but it doesn't set the TextView color from green to white and it doesn't log anymore
CODE:.............
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Apr 9, 2014
I want to ask where does the defaults values of memory min-free values of a Rom reside? I mean what file I would have to edit to edit those values?
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Jun 12, 2010
How can we pass Android Home Screen Widget info ( putExtra maybe ) to an Activity.. What particular method callback will handle this one?
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Nov 12, 2010
Is there a way to pass an Array List of objects between activities? The myObject implements Parcelable and I'm able to successfully pass the objects around individually, but that means I need to have an exact amount of "myObjects" coded. I want this to dynamically grow/shrink by what the user does with the app. I have seen some posts on the web about doing:
Activity A
ArrayList<myObject> myObjArray = new ArrayList<myObject>();
Then when passing this into the intent I would use:
intent.putParcelableArrayListExtra("myObjArray", myObjArray);
Activity B
ArrayList<myObject> myObjArray = new ArrayList<myObject>();
Bundle extras = getIntent().getExtras(); myObjArray = extras.getParcelableArray("myObjArray");
However, the myObjArray always gets filled with "null". How can I achieve this?
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Apr 7, 2009
I have an ArrayList<MyList> aList in an activity. I would like to send this data to another activty. Such that,
ArrayList<MyList> aList;
Intent intent = new Intent(); intent.setClass(mainactivity.this, newActivity.class); intent.putExtra("MyList", aList ); startActivity(intent);
On the receiving activity,
Intent i = getIntent(); newList = (ArrayList<MyList>) i.getSerializableExtra("MyList");
But this gets me no where. ERROR! My intention is to share this List between activities.
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