Android :: How To Get Activity View Inside That Activity?

Nov 11, 2010

I want to show my next activity withing my previous activity layout "LinearLyout". But it is not working. Can any one help? I put my last activity layout reference to a global class in an static variable. My code...

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Android :: Cannot Call Method Of View Object Inside Activity

Nov 7, 2010

In my program I have a custom view object. Inside the view class is a method called foo. For some reason when I call foo from my activity, it doesn't fire. Here is the code:

XML of the custom view:
<com.company.application.MyView android:id="@+id/my_view" android:layout_width="wrap_content" android:layout_height="wrap_content" />

The activity code:
public class Main extends Activity { MyView mView;
/** Called when the activity is first created. */
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState); setContentView(R.layout.main);
LayoutInflater li = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = li.inflate(R.layout.main, null); mView= (MyView) v.findViewById(R.id.my_view);
//A button to fire the method inside foo() Button switchLeft = (Button) findViewById(R.id.switch_left); switchLeft.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { callTest(); } } );
} public void callTest() { Log.w(this.getClass().getName(), "clicked left arrow");
mView.foo(); mView.postInvalidate();
} }

Finally here is foo:
public void foo() { mBackground = mContext.getResources().getDrawable(R.drawable.temp_canvas); Log.w(this.getClass().getName(), "background set");
}

The first log is always written when the button is pressed, but the second log is not because foo never fires. What is the deal here? Upon request, the full view

public class MyView extends View { Drawable mBackground; Context mContext;
public MyView (Context context) { super(context); mContext = context;
mBackground = mContext.getResources().getDrawable(R.drawable.leftarrow1);
} public MyView (Context context, AttributeSet attrs) {
super(context, attrs); mContext = context;
mBackground = mContext.getResources().getDrawable(R.drawable.leftarrow1);
} public void foo() { mBackground = mContext.getResources().getDrawable(R.drawable.temp_canvas);
Log.w(this.getClass().getName(), "background set"); }
@Override public void onDraw(Canvas canvas) { Paint paint = new Paint();
paint.setStyle(Paint.Style.FILL); // draw a solid blue circle
paint.setColor(Color.BLUE); canvas.drawCircle(20, 20, 15, paint);
// draw a test background mBackground.setBounds(0, 0, 300, 400);
mBackground.draw(canvas); }
}

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Android :: Can Update A List View In One Activity While Im In Another Activity

Oct 4, 2010

I currently have a tab layout with 2 tabs, one tab with a list view and one with the option make strings so I can add them in the list view. Both tabs have their own activity because this made the code much more structured, and I dont have to repeat my self later.

Lets say im in the tab that offer me to create an string, and i press the update list button, how do I update the list view without startActivity()? If i use startActivity(), it starts List.java, and instead of displaying the list in the list view tab, it takes full screen, which defies the purpose of the tab view. In other words, the startActivity() steals the focus from the tab view of the list, and sends it fulscreen.

I want to update the activity in my list view tab, without starting a new activity that goes to fullscreen, and doesnt update the one in the tab.

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Create New Activity Or Update View Of Existing Activity?

Dec 24, 2012

I am working on developing an app and I am not sure when should I use a new activity and when should I update the existing view.

For example, lets say I have a view that shows a multiple choice question.Now, when the user selects his choices and clicks on say "Evaluate", I want to show the same question view but along with the right answers and explanations for each option. So does that mean, I should send an Intent upon a click on Evaluate or I should just update the view (i am not sure how)?

If I send an intent and show a new screen, how can the user go back to the next question without displaying the answers? If I don't create an new activity, how can I update the existing view that is already displayed?

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Android : Way To Stop GPS Inside An Activity

Aug 12, 2010

Currently working on a simple app to allow users to find various things around them. When the activity that shows the Google map is active I can see the GPS icon on the status bar, which is normal. But I need to be able to stop the GPS hardware when my user navigates away from the activity, and switch the GPS back on when the activity is shown.

Is there a simple way to stop GPS when a user navigate away from an activity? I have tried the LocationManager's removeUpdates() but this doesn't actually stop the GPS (the icon is still flashing on the status bar and draining the battery).

What I'm looking for is a simple way to programatically stop the GPS hardware.

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Android :: Add Activity Indicator Inside An Alert?

Nov 24, 2010

Is it possible to add an activity indicator as a part of an alert. i need this bcos it is difficult to show alert view in white background.

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Android :: Display Widget Inside Activity?

Jun 2, 2010

I was wondering if there is a way to show a widget that I have created inside an activity. I have a weather widget and I also have an app I am working on that I would like to include weather reports in. Is there a way I can just re-use the widget code and make it show inside the weather activity?

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Android :: How To Embed External Activity Inside One Of Mine?

Nov 22, 2010

I need an Activity showing a specified PDF and two buttons. Is possible to embed an external PDF viewer - showing a specified URI - inside the view of my application? How can I do it?

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Android :: Put Camera Preview Inside A Surfaceview In An Activity Xml Gui

Aug 27, 2009

I just got my camera preview working for my app, but it is not appearing where I want it to appear, and I'm not sure how to get it there. Instead of using the entire screen for the preview, I would like to put it inside a surfaceview in an activity xml gui. What do I need to change? Here is my code:

public class TakePic extends Activity {

SurfaceView camSurface;

Preview camPreview;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

requestWindowFeature(Window.FEATURE_NO_TITLE);//hide window title

camPreview = new Preview(this); //create preview

setContentView(R.layout.takepic);

setContentView(camPreview); //set preview as activity content

camSurface = (SurfaceView) findViewById(R.id.camsurface); }

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Android :: Start An Activity Inside Any Layout In Droid?

Sep 24, 2010

I have created a an activity named Example which have 3 LinearLayouts . I want to start an activity. So I used the following lines of code...

Test is another activity. As a result of the above code a new activity is called in new page. But I want to get the same resule or start the activity inside 2nd layout of Example class.

How to achieve this.

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Android : Access A Method Of An Activity Inside TabActivity?

Oct 1, 2010

I would like to access the public method of an Activity run by a TabActivity using: Code...

Basically, what I what is to let the parent Activity call a method in child Activity in order to do something. Is this possible?

I did try this:((TeamHuddleScreenMsgsView)getTabHost().getCurrentTabView().getContext()).refreshModel(); but I'm encountering a ClassCastException. It seems that the getContext() still gives the TabActivity. Any help on how to get the child Activity?

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Android : Inside TabActivity / How To Get Instance Of Current Tab Activity?

Apr 23, 2010

I have attached a menu to my TabActivity, and when a menu item is selected, I would like to do something different based on which view is being currently displayed in the TabHost.

int getCurrentTab() returns me the id of the current tab... but from that int how can I get the instance of the activity running?

I also tried getCurrentView(), getCurrentTabView(), but these return things I can't seem to cast to the class of the current activity.

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Android :: Method Of Service Does Not Take Place Immediately From Inside Activity

Aug 6, 2010

I have an activity A which uses SharedPreferences to share data with a service S, which is called from within A.Now when I call the stopService() method from A, the onDestroy() method in S is not called immediately.I thought that all the activities and services under a single apk run in just one process. Why then does the jump to onDestroy() not take place immediately instead I can see the output from onDestroy() after the further code in the activity A is executed.

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Android :: Accessing Activity Methods Inside Click Listener

Aug 25, 2009

I have a click listener:
private OnClickListener onMyListener = new OnClickListener() {
public void onClick(View v) {
myMethod();
} };

And my Method:
private String myMethod() {
TextView tv = (TextView) findViewById(R.id.TextView1);
return (String) tv.getText();
}

When it calls this method, at tv.getText() it breaks in the debugger.
With this in the stack --
ViewRoot.handleMessage(Message) line: 1571
ViewRoot(Handler).dispatchMessage(Message) line: 99
Looper.loop() line: 123
ActivityThread.main(String[]) line: 3948
Method.invokeNative(Object, Object[],
Class, Class[], Class, int, boolean)
line: not available [native method] Method.invoke(Object, Object...) line: 521 ZygoteInit$MethodAndArgsCaller.run() line: 782 ZygoteInit.main(String[]) line: 540 NativeStart.main(String[]) line: not available [native method]

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Android :: How To Use Multiple Views Inside A Single Activity With A Canvas?

Nov 7, 2010

Basically what I am trying to accomplish is I want a canvas I can pass bitmaps to, to be displayed on the screen with the rest of my view objects (buttons, textviews, etc).

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Android :: How To Show A Webview Inside An Activity In Middle Of Screen

Jul 30, 2010

I am having issue while showing a WebView in an activity in the middle of the screen. I have an activity and I want to show a webview in the center of screen. My activity is transparent so background activity will be visible. Whenever I try to create a webview and add it to activity using setContentView(webview) it always shows the view on the top left corner of the screen. Is their a way to workaround this?I am trying to do this via pure code only.

Here is my code.

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

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Android :: Check Condition Inside OnCreate() Of Activity And Display An AlertDialog?

Aug 18, 2010

I am new to Android and this is my first question here so please go easy on me.

Is it possible to check some condition inside onCreate() of an Activity and display an AlertDialog?

I am creating an AlertDialog anonymously in Oncreate() and calling show on that instance but the AlertDialog is never displayed.

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Android :: View Containing Reference To Its Activity

Oct 28, 2009

I have a custom view that needs a reference to the activity that created it.Dianne Hackborn said in another thread: >Give your view a reference to the activity (or a Java interface it implements) and call back through that. >Much much MUCH more efficient than sending a broadcast. >See all of the standard view and view subclass callbacks for examples.

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Android :: Way To Open Activity From View?

Oct 2, 2010

How to open activity from view.i am develop a game if game is over i need to move user to main menu activity.Please help me its very urgent to me.

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Android :: Add A View / Activity On Top Of A ListView

Jun 2, 2010

I want to have a view with several choices when I click an element of my ListView. I was thinking of implementing an AlertDialog but as I need more than 3 options it is not possible. I also thought of putting my ListView in a FrameLayout and have an view with a gone visibility that I would turn visible at the click and update the content but I don't know If it's a good idea. Code...

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Android :: How To Remove A View From An Activity?

Jun 20, 2010

You've got a View defined in a layout file. How do you remove it from you Activity code?

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Android :: Way To Start A Sub Activity In Same View?

Nov 4, 2010

I want to start a new activity intent in my current view! How i can do that?

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Android :: Android's Listview - Update View Within Of Cells Just After Invalidating Activity's View

May 15, 2010

I have ListViewActivity
public class SelectActivity extends ListActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.select_one_of);
SimpleAdapter adapter = new SimpleAdapter(
this,
createChildList(),
R.layout.select_one_of_childrow,
new String[] { KEY_VALUE },
new int[] { R.id.selectoneof_add_new_item});
setListAdapter(adapter);
}
// ...
}

after setListAdapter() calls I would like to execute the following code:

((TextView) getListView().getChildAt(0).findViewById(R.id.selectoneof_add_new_item)).setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ticked, 0); but getListView().getChildAt(xxx) returns null and I catch NullPointerException. Where should I put mentioned above code-snippet?

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Android :: How To Add Fixed View To Preference Activity?

Jul 13, 2010

It occur some problems to develop U/I. there is a PreferenceActivity that was aleady developped and is typecally like 'Settings' of android. by the way, the customer is requiring to change U/I like IPhone.Requirements are

1.application title-bar using ImageView(or TextView) positions to top

2. remove ContextMenu, alternativly static menu buttons positon to bottom.

3. PreferenceActivity is able to scroll and title-bar & menu buttons are fixed each positions.

just all. but It's very difficult to add & fix two views in Preference Activity.

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Android :: View Task's Activity Stack

Mar 14, 2010

I just started developing a simple Android application while I'm still learning its platform. I'm using Eclipse IDE with the ADT plugin 0.9.6 and I need to know if it's possible to view the activity stack that is associated with a Task. Is there any way through the DDMS tool or through any other technique?

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Android :: Do I Have To Use An Animation To Change Activity's View?

Jul 28, 2010

Everywhere I look online, it seems that I must use an animation to change views dynamically (like slide in, out). Do I have to do this, or can I simple just setContentView() on each new activity?

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Android :: View An Activity On Button Click

Jun 30, 2010

I want to show the details of a list item in another activity when clicks on a button.Can you help me?

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Android :: How To Get View From Activity Similar To Tab Host

Aug 15, 2010

I am trying to make an Accordian control where each section would have its own view accompanied with its own activity. With the TabHost I can add tabs based on Intents and it is this behavior I am trying to understand how to use. So given an intent or an activity how can i get the view?

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Android :: Get Activity Object While In View Context

Oct 10, 2010

This is a followup to this post: http://stackoverflow.com/questions/3897176/findviewbyid-in-a-subclassed-surfaceview-throwing-runtimeexception Based on Romain Guy's feedback (which I'll accept shortly as it is a solution), I'd like to obtain the calling Activity from within the View, so that I can use it to obtain the desired Text View resource. I don't see any methods in View that return Activity. What is the proper way to do this? Or is there a better alternative for working with TextViews from within another View context. Basically, I am calling setContentView(R.layout.xxx) in onCreate() (as usual), so I don't really have a way to pass in references to additional TextViews unless I awkwardly retrieve the View after setContentView and then make calls on it.

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Android :: How To Get Root View Of Current Activity?

Jun 11, 2009

Is there a function that allows me to get the top most view (the root)?

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Android :: Way To Connect A Layout View With An Activity?

Feb 4, 2010

It displays the first view correctly but i want it to be connected to a java class so i created an FirstActivity class where i can control all my components in the first view but how do i attach the first.xml layout with the FirstActivity java class ?

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Android :: How To Start An Activity From A View In Droid?

Jun 18, 2010

Is there a way to start an activity from a view? I have this nice view that renders these menu buttons and when they click a particular button (Trapped in an onTouch event) I want to start the "clicked" activity. It seems that there from my view startActivity method is uncallable. So that leads me to believe that there is no way to do this, in which case I guess I am asking, what do I do here when I want this menu to have a view that animates drawables and can get touches to know what "button" was pressed to know what activity to start?

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SetContentView Of Activity Within Activities Current View?

Feb 17, 2012

So I have my main activity. It starts out adding a custom SurfaceView called DrawView as the content view with

DrawView drawview = new DrawView(parameters);
this.setContentView(drawview);

now my layout.main.xml is a layout with a video view which I am using to play my cutscenes. I am able to switch to this view by calling a method I made which switches the content view by

this.setContentView(R.layout.main);

which works fine when I am calling this method within the Activity. Only problem is I need to call this method from within DrawView! The method I made to switch to my cutscene is public and I do pass the Activity (named Draw) as a parameter of DrawView.

So when I do call this method from within DrawView my game freezes and will subsequently crash! however it works when method is called locally?

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View Lifecycle And Refresh When Returning From Activity?

Oct 26, 2012

I'm writing an application for Android and have multiple Activities, there are three to be exact. When a user drills down to the record they would like to view, they can modify it.

The issues is that when I click the back button to move to the previous screen, i'd like to refresh it to reflect the update performed by the end user. I can't figure out how to hook onto the appropriate event and then refresh my data on that view.

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General :: How To Install Widget From Activity View

Feb 11, 2012

is there a way to install a widget from a Activity view? I've implemented a Activity which shows the user all widgets installed on the system, the user can tap a widget icon to "install" the widget on the workspace.

If the app is installed as "user app", i cant bind the widget to the allocated id, if i install the app as "system app" in /system/app, all is working.

can i workaround that or is it in android gingerbread only possible to pick a widget through the system wide "pick/choose" activity/dialog?

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Android : Closing Activity Completely / Process Killed By Activity Manager Service

Aug 2, 2010

Whenever the memory needs to be reclaimed, the process is being killed by Activity Manager Service in killPidsForProcess. I have a back button in my activity window on right corner of the title bar.

I want to kill the activity completely on clicking the close button. Can I reuse the same function and will it have any major effect? Please help me out in this.

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Android :: Accessing Battery Info Activity (or Any System General Activity)

Jan 20, 2009

I want to be able to show the Battery Info activity in my app, which shows things such as the exact level, battery health, etc.I'm not sure how I can get it, though a few applications such as Power Manager, Any Cut, etc. show this screen as well. I found in the source code of Settings this intent in a file called testing_settings.xml,But I don't know how to use it. I would guess from the fact that Any Cut has a list of activities, that a list of said activities exists somewhere, and therefore an easy way to access them exists, but I haven't found it.

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Android :: How To Launch External Activity In Current Activity's Process?

Aug 27, 2010

My app is comprised of a set of reusable Activities that other apps can reuse. For various reasons, I would like my Activities to be launched in context of the invoking Activity's process, instead of always being launched in my Activity's process (default behavior on Android). How can I achieve this?

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Android :: How To Clear Activity Stack If Using Same Activity Multiple Times?

Mar 3, 2010

So I have an app with Activity A. The layout on the activity is dynamic genearted. So it's possible that on Activity A a user hits a button that goes to "A" and the new page looks different, then a user clicks another button to go to "A" again. Now I have 2 Activities in the history stack. A, A, and currently on A. Is it possible that if a user clicks a button that the whole Activity stack is cleared in a scenario such as this?

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Android :: Finish Any Previous Activity In Stack From Current Activity?

Apr 27, 2010

How to finish any previous activity in application stack (at any level , I mean not immediate parent) , from current activity like on some particular event I want to invalidate this previous activity?

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Android :: Retain Only One Copy Of An Activity On Stack When Called From Non Activity

Jul 26, 2010

How can I make sure I only retain one copy of an activity on the stack when called from non-activity? When called from an activity I can just add the FLAG_ACTIVITY_REORDER_TO_FRONT flag to the Intent, but how can I do this from e.g. a widget or a notification?

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Android :: Force Activity In Landscape Mode Without Activity Restart

Aug 21, 2009

I have a problem to start/create Activity in landscape mode. My Activity need to start in landscape mode and be used in landscape mode by users. So far, I used setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) to force screen orientation of my Activity to landscape mode in onCreate() method.

In addition to this screen mode requirement, my application need to start another background thread in onResume() method, and this thread takes some seconds in order to finish an initialization process, and it is not desirable to to stop/restart this thread's service during the initialization process.

However setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) forces my Activity restart in a very little while (means onCreate->onResume->onPause->onStop are executed twice at the first place). As a result, my background thread be stopped/restarted during the initialization process, and this makes me a mess at this moment.

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Android :: Current Activity Force Closes - Tries To Go To Previous Activity

Nov 5, 2010

The default behavior from my observation is if current activity force closes Android tries to go to previous activity on stack How can I control this behavior? I want force close to close all activities

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Android :: Open Dialogue Activity Without Opening Main Activity Behind It

Jul 19, 2010

Im writing a program that offers a quick reply dialog upon receipt of an SMS.

However, I am getting an unexpected result. When I receieve an SMS, the appropriate dialog activity comes up displaying the correct phone number and message, however there is a second activity behind it that is the 'default' activity in my program (it is what opens when i launch my application)

I do not want this second activity to come up. The quick reply activity should come up by itself over top of whatever the user was doing before.

The 'floating' activity:

CODE:.........

The call to the activity inside an onReceive()

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

The Manifest:

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

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Android :: Passing Arguments From Loading Activity To Main Activity

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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