Android :: Pass Data Between Activities?
Oct 6, 2010
I'm developing an app which basically navigates through a xml-feed. When I parse the feed or let's say the list, then each (list)item becomes a model. All the models are wrapped up in an array list. Now, when the user clicks on a list item, the underlying model is going to be serialized and sent as IntentExtra to the next Activity (e.g. a deeper sub list). (Originally I asked here a different question. The solution was not related to Serializable and wouldn't help anybody. However MatteKarla gave an interesting input. Thats why I decided to rewrite this question.)
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Jul 2, 2009
The main activity includes some variables with set values. I created a sub-activity with the form which has to be filled with the data from main activity so I guess the data have to be passed to the sub-activity when it starts. how to pass the variable values to the sub-activity from the main activity?
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Jun 3, 2010
How to pass data between activities in an Android application?
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Nov 16, 2009
I am trying to pass a custom object to one activity from another. What I would like to use is the HashMap of WeakReferences, but the description isn't clear, at least to me. From above URL: "A HashMap of WeakReferences to Objects. You can also use a HashMap of WeakReferences to Objects with Long keys. When an activity wants to pass an object to another activity, it simply puts the object in the map and sends the key (which is a unique Long based on a counter or time stamp) to the recipient activity via intent extras. The recipient activity retrieves the object using this key."
MyObject object = new MyObject(); HashMap map = new HashMap(); WeakReference reference = new WeakReference(object); map.put(reference.hashCode(), reference);
Intent i = new Intent(myIntent); i.putExtra(map);
I know this is probably way off but I can't figure out how this is intended to be implemented based on the description. Are the keys hashcodes, user defined, or what? It sounds like all that is passed is a HashMap containing the key values but how is the object retrieved with just the key? I couldn't find any code examples or useful documentation on this method of passing objects
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Jan 19, 2010
i have a scenario of login page after logging in there will be sign out button on each activity. on clicking signout i will be passing session id of signed in user to signout. can any one guide me how to keep session id available on all activities??
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Aug 30, 2010
I want to pass an object from Activity B to Activity A. Scenario:
- Activity A calls Activity B
- User selects item in Activity B
- Activity B passes an object to Activity A
How do I accomplish this? And in which method do I read in the passed object in Activity A?
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Jan 3, 2010
How can we pass checked box status from one activity to the calling activity? For e.g., I have two activities. The first activity calls the second activity that has a listview with checkboxed items and two buttons, 'OK' and 'CANCEL'. The second activity has to pass the names of list items that are checked to the calling acitivity. I am not able to figure out how to do this efficiently?
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Apr 19, 2010
Today I met a problem, I need to pass a ArrayList<MyClass> from an activity to another. I dont know what the Intent exactly do when I use putExtra to pass in an ArrayList<MyClass> object. I guess MyClass need to implement Parcelable interface, so I just did it. But still, it does not work. Maybe I need to create a Bundle and then use Bundle's putParcelableArrayList method to put my ArrayList<MyClass> object in, and then pass this bundle as parameter of putExtra to the intent. So crazy! I am lazy, I just want to pass an ArrayList<MyClass> object simply, is there a simple way??
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Oct 18, 2009
I am trying to pass a user defined object to another activity Bundle bundle = new Bundle(); bund.putSerializable("myData", myData); intent.putExtra("bundle", bundle); where myData class implements Serializable interface. I am getting following error: java.lang.RuntimeException: Parcelable encountered IOException writing serializable object how to pass complex objects between activities?
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Nov 17, 2010
I have an Object that I need to be able to pass between Activites. It implements Parcelable and I've written all the code related to that. The problem is that one of the properties of the Object is a Drawable - and really needs to be. Unfortunately, Drawable is neither Parcelable or Serializable. I don't understand how to pass it. The reason for having the Drawable is that I need to cache an Image that I've downloaded from the internet at runtime. I don't want to cache the images on the filesystem, since this would potentially end up using up a lot of space over time. I'm putting the image into a Drawable so that I can easily put it into an ImageView.
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Jun 30, 2010
how to call BarCodeScanner, and return the value to a field.so now, i have a toast that says "successful scan" and then i want to pass the result to a new activity. when i comment out my intent, everything works (minus the passing of data/switching of screen, obviously) but when i run my project as is, it FC's no errors reported by eclipse in code or xml. any insights?
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May 13, 2010
I am developing an application using services and Remote interface. I have a question about passing the reference of my Remote interface throughout Activities. In my first Activity, I bind my service with my activity, in order to get a reference to my interface I use
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName arg0, IBinder service) {
x = X.Stub.asInterface(service);
}
@Override
public void onServiceDisconnected(ComponentName arg0) {
// TODO Auto-generated method stub
}
};
x being the reference to my interface. Now I would like to access this interface from another activity, I see two ways to do it but I don't know which one is the "proper" way to do it: passing x with my intent when I call the new Activity redo this.bindService(new Intent(y.this,z.class), mConnection, Context.BIND_AUTO_CREATE); in the onCreate() of my new Activity
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Dec 8, 2009
I'm working on an application that requires non-serializable objects to be passed between Activities. The following page suggests using a HashMap of WeakReferences to accomplish this:
http://developer.android.com/guide/appendix/faq/framework.html
Is this solution safe? I know Activities are completely destroyed and recreated when the screen orientation changes. Couldn't those weakly referenced objects get GCed in the split second when the screen is rotated, since they wouldn't be referenced elsewhere at that point?
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Jun 29, 2010
How to pass socket, inputstream, outputstream objects between activities
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Oct 15, 2010
How can I pass a Object: ArrayList from one Activity to another? Seems that intent cannot hold custom ones except ArrayList. As a kind of hack, I use a static member: staticResultList = new ArrayList<SingleExamResult>(m_examResults); and Get it in the following Activity by: m_examResults = DoExam.staticResultList; It's not the correct way obviously, any 'common' approaches?
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Nov 12, 2010
class1.java has creates a float[] array that is need to have in class2.java. How do you do this? The float[] is points. Here is an example code:
class1.java
import android.app.Activity;
import android.content.Context;
import android.app.ListActivity;
import android.content.Intent;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;......................
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Oct 26, 2010
The FAQ mentions a method of passing objects around activities. (It is not clear to me): "A HashMap of WeakReferences to Objects. You can also use a HashMap of WeakReferences to Objects with Long keys. When an activity wants to pass an object to another activity, it simply puts the object in the map and sends the key (which is a unique Long based on a counter or time stamp) to the recipient activity via intent extras. The recipient activity retrieves the object using this key.".................
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Aug 24, 2009
I have two activity in my project. I am callilng second activity from main activity. can some one tell me how can i pass some data to that activity? Simply i want to pass object array. Can some one tell me how can i do it ?
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Jun 29, 2010
In my Android app,I start a new activity with startActivityForResult(). I get the result in onActivityResult() perfectly. My problem is that there is a small bit of data that I know before I start the activity and I need that value to be available in onActivityResult(), too. I tried attaching it to my intent as an extra, but it wasn't attached to the intent that is available when the activity returns the result. I made it work by storing the data in a global variable, but I really don't like that approach. Is there a better, right way to pass data through an activity (instead of just to it)?
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Aug 4, 2009
Have some tryed to pas databuffer on android by jni?
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Dec 21, 2012
This is my 1st activity code:
Intent i = new Intent(getApplicationContext(), CustomerLogin.class);
i.putExtra("GrandTotal", mGrandTotal);
startActivity(i);
This is my 2nd activity code:
Intent in = getIntent();
Bundle b = getIntent().getExtras();
String total = b.getString("GrandTotal");
TextView grandtotal = (TextView) findViewById(R.id.grand_total);
grandtotal.setText("Welcome ," + total );
Here the value is pass from 1st to 2nd activity successfully. Now i have to pass these value to third activity.how can i do.
Now this is my 2nd activity:
if(isUserValidated && isPasswordValidated)
{
Intent intent = new Intent(CustomerLogin.this,PayPalIntegrationActivit y.class);
intent.putExtra("GrandTotal", total);
intent.putExtra("login",username.getText().toStrin g());
startActivity(intent);
}
This is my third activity:
Bundle b = getIntent().getExtras();
String total = b.getString("GrandTotal");
TextView grandtotal = (TextView) findViewById(R.id.check);
grandtotal.setText("Welcome ," + total );
Now i have to run the app means am getting the total value on 2nd activity.but am not getting the total value in 3rd activity.
This is my full source code:
1st activity:#5564017 - Pastie
2nd activity:#5564018 - Pastie
3rd activity:#5564020 - Pastie
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May 24, 2010
I am working on an application and one feature that would make it really useful is the ability to share some information, but the other device may not be expecting the data to be sent.For example, if I am reading a really good book, and I realize that a friend may like it, I could use an application to send the data to him, so he could order the book from Amazon.But, since he isn't expecting the data, I would hate for the application to be polling a server every so often, as that will be needlessly draining the battery.Ideally it would be great if there was a way to make a phone call to the target device, send a data packet and end the call.If it could be done and prevent the phone from ringing, then it would be very useful to me.I am curious if there is some way to send data between devices without polling.
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Nov 11, 2010
in my app i am having an Activity that launches another Activity ontop of it. The second Activity is meant to provide controls like next and previous for the first activity.How can i pass button events between the two activities that are visible at the same time without closing the Activity with the controls?
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Jun 17, 2009
I am stuck - or perhaps I am trying to do something that can't be done.I would like to send an intent to the NotificationManager with data so that if it is clicked, the Activity that is called will do something with that data.I have tried a variety of things, the Activity does get called but no sign of data (and I am frankly a little unclear as to where to retrieve it).If someone out there can either suggest something or tell me I am headed down a dead end I would be grateful.
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Oct 30, 2010
I'm trying to pass data from notification to activity.
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Jun 12, 2010
I am want to pass data back from a Thread to Activity (which created the thread). So I am doing like described on Android documentation.Only one thing I am missing here - where and how should be defined mResults so I could access it from both Activity and Thread, and also would be able to modify as needed? If I define it as final in MyActivity, I can't change it anymore in Thread - as it is shown in example.
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Nov 2, 2010
I wounder if there is some possible to know from which parent Iam coming from in the child so I can do different stuff depending on who the parent is of the activity.This is how Iam going over to the child. But I don't know how to handle this in the child to check who is the parent. The above code is used on one of the parents,, is there somehow I can use "EQ_CODE_SELECT_LOCATION"? Also I wounder how is possible to send data to a child activity?
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Jul 20, 2010
How do I get data within an Android Service that was passed from an invoking Activity?
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Nov 3, 2009
From one activity, I want to pass a lot of data (about 1MB of Strings).I tried sticking it in Intent.putExtra(ArrayList<String>), but if I put in too much data, I get "FAILED BINDER TRANSACTION".What's the easiest way? I don't want to publish a service, or use the file system. I really want a pipe that can write data from one end and read it from the other end. I can handle the case where the starter Activity dies while the "startee" activity is trying to read from the pipe.
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Apr 11, 2010
I've got an Android application which needs to be woken up sporadically throughout the day.To do this, I'm using the AlarmManager to set up a PendingIntent and have this trigger a BroadcastReceiver. This BroadcastReceiver then starts an Activity to bring the UI to the foreground.All of the above seems to work, in that the Activity launches itself correctly; but I'd like the BroadcastReceiver to notify the Activity that it was started by the alarm (as opposed to being started by the user). To do this I'm trying, from the onReceive() method of the BroadcastReceiver to set a variable in the extras bundle of the intent,Can anyone tell me what's different about passing a bundle from a BroadcastReceiver to an Activity, as opposed to passing the bundle from an Activity to a BroadcastReceiver?
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