Android :: Access Application Class From Class Other Then Activity

Sep 8, 2010

I'm new to Java and android development. In my application I need data which is accessible for a few activities. I've read that a good solution is to use Application class for this. So I use it like this:

public class MyApplication extends Application {
private String str;
public String getStr(){
return str;
}
public void setStr(String s){
str = s;
}
}

and I can access this variable from activity like this:........................................

Android :: access Application class from class other then Activity


Android :: Communicating Between Receiver Class And An Activity Class

Jul 14, 2010

I'm just getting into Android development, and I have a question about communicating between a receiver class and an activity class. I'm very new to JAVA and Android so I hope I don't sound too stupid. I'm developing an application where I intercept an SMS message and then based on various elements of that SMS I might delete it once it's been saved to the inbox. I have a receiver class that intercepts the txt message, and I am also able to delete messages from my inbox with code in the activity class using a button at the moment. The problem I have is communicating between the receiver class and the activity class where the code to delete a message resides. I tried putting that code directly into the receiver class but as I'm sure most of you already know the BroadcastReceiver class doesn't seem to support what I need to delete messages. I've been searching for an answer to this for a while, but haven't been able to find anything. Honestly I'm not sure I know enough about JAVA and Android to even recognize a solution if I saw it.

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Android :: Call Activity Class From Other Java Class?

Oct 8, 2010

I have just started android. I just want to know that how can i call activity class from other java class. i just want to pass class object to activity class.

public class GsonParser extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
MagazineThread thread=new MagazineThread();
thread.start();
}
public GsonParser(JsonMagazineParser Obj)
{

}
}

and i am just doing like from other class. GsonParser obj=new GsonParser(this);passing obj to activity class.how can i achieve that.

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Android : Access Context Of A Class Which Is Not An Activity?

Jan 28, 2009

Can anyone tell me how to access context of a class which is not an activity?

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Android :: Creating A New Class Using Eclipse New Java Class Dialog Box

Jul 7, 2010

I'm creating a new class, using eclipse "New Java Class" dialog box. I can write the superclass I want (I can't find using "browse" button), but I can't write or select an interface to implement. I click "add" but ther is nothing to select. What I'm doing wrong?

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Android :: Accessing Class Level Stuff From Inner Class

Jun 27, 2010

What I want to do, is be able to access the object neoApi inside the Neoseeker class, from its inner class RunningTimer. Now, in my code, you can see what I would think to work, but when I run my application, nothing pops up. Nothing inside my TextView, no Toast, nothing at all. How can I remedy this?

package com.neoseeker.android.app;
import java.util.Timer;
import java.util.TimerTask;
import org.json.JSONObject;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;.......................

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Android :: How To Run Class In Background Among Package Of Class?

Apr 23, 2010

In my app in one package there are some classes. from those classes i want to run one class that is the Gps functionality class. i want to run that class in background. how i do it, i don't know. i am not able to make it solve from any document. if anybody knows the way to solve it please me by run a "hello world" app in the background. i am not able to solve this problem by going through document.

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Android :: In Java, What Does A Reference To Class.class Do?

Jul 20, 2010

I'm building a small Android application, but this is more of a Java question than an android question. Looking through the tutorials there are lines that look like: startService(new Intent(this, MyService.class));

What exactly does the "MyService.class" field represent? Is that just a reference to the class for a template?

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Android :: Dialog Class With It's View Class?

May 19, 2009

I made a Dialog Class with it's view classI want to pop up the dialog when I got some packets from network. so I made a Thread which parses packets and then I made if clause in Run() method There is no problem with parsing packet but when I enter "if clause" and call showDialog() I got Error message

Is there anyone who knows how to pop up a dialog from different thread?

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Android :: How To Access Intent Value In Another Class?

May 5, 2010

I had write two classes IntentA and IntentB in my application (Both are in same package and both extends Activity class). In IntentA class I had created one button on pressing that button controll is trsnfer to IntentB class. IntentB class also contain Button on pressing that control is transfer to IntentA class.

This work fines. Now I want to set value in IntentA class using putExtra method and access that value in IntentB class How should I do that? I had put value in class IntentA like

Intent i1 = new Intent(this,IntentB.class);
i1.putExtra("Intent Name", "IntentA");
startActivity(i1);

Now I don't know How to access "Intent Name" value in IntentB class.

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Android :: Access To Class Not Allowed / What To Do?

Feb 6, 2009

I get an apk file from somewhere. I tried to install it the emulator successfully. (The emulator is built from the latest code in AOSP which should be cupcake or later). But I can't launch the application from the GUI. It complains "The application xxx has stopped unexpectedly." After checking the logcat, I find the message "access to class not allowed". It seems that that process is not allowed to instantiate the Activity class.

Since I can install the apk successfully, I am curious why I can't launch it as a user.

BTW, I tried two ways to install the app. 1) by copying it to /system/ app and rebuild the system.img 2) by using "adb install". Both getting the same error message.

I tried to extract the AndroidManifest.xml file from the apk. But it seems that the file is scrambled and can't read.

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Android :: Where To Put Custom Data And Access Them Via R-class Then?

Aug 5, 2010

In a typical Android project you have the res/drawable directories where you can put images but i have some special custom binary files.

where do I usually put them and can i access them via the R-class then?

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Android :: Start An Activity From Non Activity Class

Aug 19, 2009

An activity can be called from existing activity through *startActivity(intent); *

Is t possible to call an activity from non Activity class ? and how?

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Android :: Core Class Access Resources At The App Layer

Sep 22, 2009

Can a core class such as "AbsListView" access resources, such as xml files, and .png's, in a 3rd party app installed in the normal way (at the app level)?

I realize this is a change in framework code, and that is fine for my purposes. So, for example, if I know that I am going to install an app called "MyApp", could I go into frameworks/base/core/java/android/ widget/AbsListView.java and tell it to use an xml file and .png's that live in that app? Here is the line I would want to modify: setSelector(getResources().getDrawable( com.android.internal.R.drawable.list_selector_background));

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Android :: Access Drawable Resources From A Not Context Class?

Nov 7, 2010

So I'm defining a class that sets a Drawable attribute in an object. The problem is that I can't access the getResource().getDrawable(int resourceId) method unless I have some Context.
So what I did was to send to that class an activity instance (let's call it "act") and then I did:

act.getResources().getDrawable(R.drawable.whellchair)

but, when executing that line it throws a NullPointerException.

When idea how to accomplish this?

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Android :: Context To Use In A Activity Class?

Mar 3, 2010

I have a class defined as

public class viewGroups extends ListActivity

Somewhere in the class I have

objItem = new clsContactGroups(context);

I am wondering what is advised to be used here? Which context?
I know four choices, but maybe there are others...

this
this.getApplicationContext()
this.getBaseContext()
this.getParent()

I use this Context to show a Toast. So I would like to show on the front-most view visible.

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Android : Way To Use Intent From Non-activity Class?

Jan 2, 2010

I have three classes one main-activity(named MainMap), one non-activity class(named MyItemizedOverlay), and one activity class(named AudioStream). I want to start AudioStream activity from non-activity class but i don't know how to.

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Android :: Way To Access Content Resolver Methodsn From AppWidgetProvider Class?

Dec 31, 2009

Is it possible to access the content resolver methods in a class extending from AppWidgetProvider class? Have been trying to do it with no luck so far.

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Android :: Access To String 'Icon List' Given IconListActivity.class?

Sep 22, 2009

Code...

How do I access to the string 'Icon List' given IconListActivity.class?

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Android :: Starting An Activity From Callback Class

Aug 18, 2010

I have an activity class(Application Class ) which calls a service class(Service Class) and closes. The service class takes about 5 seconds to complete its task and calls a method which is present in another class(Callback Class). Now according to the result, the callback needs to notify the Application class.Once i get the callback from the service, I tried calling a method defined in the Application class. In this method i create a new intent of Application class and call startActivity(Application Class). But this is not working. Can anyone tell where i am going wrong and what can I do to solve this issue.

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Android :: Tabhost Working In Activity Class

Nov 17, 2010

I must be overlooking something because I am unable to get my TabHost to display in my Activity class.I am getting the dreaded force close when I try to run the app.It will work if I extend TabActivity, but I can't do that [details at the bottom] because once I move the code from my prototype project its going to be in a custom class that inherits from Activity.

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Android :: Call TextToSpeech In Your Class - Not In Activity

Aug 16, 2010

I wrote successfully TTS with some references in Activity.

However, I want to call this TTS in my own class as below.

CODE:............

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Android :: How To Get Method Of Listactivity From Activity Class?

Apr 19, 2009

Can i call method of Listactivity from Activity class? I have creates Intent object of myListActivity class and called startIntent() from myActivity class.

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Android :: Launching Intent From Class Outside An Activity

Jul 28, 2010

I've got two activities, one of them is called MyActivity. I want both of them to be able to use a function located in a class othat we may call MyClass. In MyClass, I try to use an intent to launch the activity AnotherActivity. Since the constructor takes a context as parameter, I simply tried to store a context from the activity in the constructor, and then use it when I try to create my intent.However, even thought none of the arguments are null (checked that with a simple if-statement), intent seems to be null and a NullPointerException is thrown. Why does it not work, and what can I do to solve the problem?
I'm quite new to Android and Java development, so please explain it as basic as you can.

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Android :: Static Database Class To Use With Any Activity

Jan 5, 2010

I am new to Android, and I haven't developed any app regarding databases on Android yet. So I have a few basic questions. I am after a good database class sample, that will let me to run the CRUD operations. I would like to use it as a static class

like: clsDB->Select("select * from clients");
or objClient->Delete(clientid);

I am wondering if someone, can share his database classes, if more people share the best. Also I have in mind to reuse this class in multiple ways, I will have services, activities etc...

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Android :: Starting An Activity From A Random Class

Sep 18, 2010

I've adapted the GridInputProcessor-class of the 3D-Gallery ( http://android.git.kernel.org/?p=platform/packages/apps/Gallery3D.git;a=blob;f=src/com/cooliris/media/GridInputProcessor.java;h=91dfd4783be6b21ec8ff2518a5c244752570e90d;hb=HEAD ) so that it detects upward/downward swipes.

The detection of swipes works, but I now want to start another activity (or draw a bitmap on the currently displayed activity), but I seemingly can't use startActivity(mContext, myIntent), because the class declaration is public final class GridInputProcessor implements GestureDetector.OnGestureListener, GestureDetector.OnDoubleTapListener {so it doesn't extend Activity...

Can I still start an Activity through this class, or how would I go about doing this? I have also tried sending a broadcast, but this is also not "implemented".

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Android :: Way To Start Activity In Receiver Class

Nov 18, 2010

This is vinod i have been saving problem while i am starting Activity in receiver so i would know this is the way or not for start activity in receiver

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Android :: Start An Activity From A Non-context Class?

May 4, 2010

For example, I have an activity that uses a utility class. I would like to be able to start an activity from the utility class and have the activity result sent back to the utility class.

The only way I could think of starting the activity was to pass the original activity to the utility class, so that the utility class could use the original activity to start the activity. The problem with this is that the activity is sent to the original activity, rather than the utility class.

I also thought of actually making the utility class an activity itself, but that would make using the utility class much more complicated.

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Android :: Call One Activity From Dialog Class?

Mar 12, 2010

How to can call one activity from Dialog.

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Android :: Example To Use Class SingleLaunchActivityTestCase <T Extends Activity>?

Aug 2, 2010

I am quite new to Android and Java
I am looking for example of how to use this class:

SingleLaunchActivityTestCase

Till now I am using class InstrumentationTestCase but the problem is that for each launched test case Android calling onSetup() and TearDown()

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