Android : Add An Array Of Buttons To A GridView In An Application

Android : Gridview And Using Array

Dec 29, 2009

My question is this: i was looking at the "Hello world view: gridview" example and was wondering, how do i load all my images dynamically. for example in the ImageAdapter.java file, at the end there is:

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

But what if i dont know the images name (as the user will add new images). what i would like to do is grab the image name from an xml file and then load it into an array.

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Android : Fill GridView With Data From Array

Nov 2, 2010

I have one question. How can i fill GridView with data from String array?

My code for adapter is :

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

Where tmpx is array with strings. But my app crashes, when i want to run activity.

LogCat error log:

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

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Android : GridView For 2-dim Grid Of Buttons

Mar 23, 2009

I have used GridView for 2-dim grid of Buttons. My problem is, that a user may "navigate" through this grid's cells -- with use of arrow keys it is possible to move yellow rectangle and by pressing enter select cell (rectangle becomes orange for a moment). Everything is behind buttons which are placed in cells of grid. How to disable possibility to select and navigate cells of grid? I would like to still use grid view but have the same possibility to navigate (change focus) among buttons (not cells in which buttons are placed) at it is possible when I place buttons in cells of TableView (not GridView).

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Android : OnClickListener Implementation Of Array Of Buttons

Nov 21, 2010

I am writing an Android Application which outputs some array of buttons dynamically.

My question is how to implement onClickListener() functionality for Array Of Buttons. I mean how to recognize the button that is clicked in public void onClick() method ? I need to display a toast based on the button that is clicked.

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Android : Placing An Array Of Buttons Of Varying Length On The Layout

May 1, 2009

I want to populate my UI with dynamic buttons at runtime. I am trying to invoke a feed from the net and based on the results (which are URLs pointing to image resources), i need to create buttons on the layout with their background set as images retrieved from URLs. I have an array of buttons which get instantiated based on the number of results returned. I was wondering whats the best way to do it - as writing them on the main.xml is not feasible.

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Android :: Create Gridview With 50 Columns For Application

Sep 20, 2010

I need create a gridview with 50 columns for my application.Then i did this gridview created with 5000 px width and in the horizontal view.its now working .But the problem is its loads about 5 row of data first time about(250) images in gridview.when scroling it reuse the above rows. but actually i need to load only the images in screen.but it not working.

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Android :: 8 X 10 2-dimensional Array Of Buttons In Android

Mar 23, 2010

I am stuck with a problem creating buttons dynamically in android. This is what i want to do-

I want to create 8 x 10 array of buttons. Since declaring 80 buttons in main.xml isn't efficient, I want to do this in the program itself. The biggest problem is placing/aligning the buttons like a grid. I can create button objects but how do I align them in the program?

Button b = new Button(this);
b.setId(i);
b.setText("Button " + i);

Like this-

1 1 1 1 1 1 1 1 1 1
2 2 2 2 2 2 2 2 2 2
.
.
.
10 10 10 10 10 10 10 10 10 10

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GridView Application Keeps Crashing?

Jan 26, 2012

my application keeps crashing with the following errors. I am using API Level 15.

01-26 19:50:45.820: E/AndroidRuntime(963): FATAL EXCEPTION: main
01-26 19:50:45.820: E/AndroidRuntime(963): java.lang.NullPointerException
01-26 19:50:45.820: E/AndroidRuntime(963): at my.grid.view.DataAdapter.getView(DataAdapter.java: 62)
01-26 19:50:45.820: E/AndroidRuntime(963): at android.widget.AbsListView.obtainView(AbsListView. java:2012)
01-26 19:50:45.820: E/AndroidRuntime(963): at android.widget.GridView.makeAndAddView(GridView.ja va:1323)
01-26 19:50:45.820: E/AndroidRuntime(963): at android.widget.GridView.makeRow(GridView.java:328)

[code]....

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Android : Adding Images Into Array Of An Application

Nov 16, 2010

I want to display the images in my Application added to my "raw" folder of the Ecllipse as it gets started.

How do I add those particular images to an Array and rotate the loop untill all the Images are displayed?

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Android :: Passing Array Buffer Between Activity In Same Application

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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Android :: Convert Json Array To Normal Java Array

Aug 3, 2010

Is there a way to convert JSON Array to normal Java Array for android ListView data binding?

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Android :: Converting Byte Rgb_565 Array Into Argb Or Rgb Array

Jan 12, 2010

I have Picture data in byte rgb_565 array, and I want convert it in a productive way into argb array. Right now I have found only one (little slow) way to do this: Bitmap mPhotoPicture = BitmapFactory.decodeByteArray(imageData, 0 , imageData.length);

where imageData is my byte[] array in rgb_565, and then: int pixels[] = new int[CameraView.PICTURE_HEIGHT*CameraView.PICTURE_WIDTH]; mPhotoPicture.getPixels(pixels, 0,PICTURE_WIDTH, 0, 0, PICTURE_WIDTH, PICTURE_HEIGHT);

The point is I believe creating a Bitmap object is exacting and not necessary in this case. Is there any other faster way to convert rgb_565 array into argb array? I need this because making image processing on rgb_565 array seems to be a little annoying. Or maybe it is not so hard?

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Android :: Converting Short Array To Byte Array

Feb 16, 2010

I am trying to make an application that would be able to send the user's voice over the network using RTP. I am using the ported stack from hsc (JLIBRTP) and I am able to record user's voice in a saperate thread. the problem is that jlibrtp uses has a class named RTPSession that is responsible for the session and has the sendData method that takes a byte [] as argument and the AudioFormat class I am using to record user's voice is in AudioFormat.ENCODING_PCM_16BIT wich is short. I have tried using 8bit audioformat but I get an illigalargument exception in my htc magic and in my emulator. So is there any way I can convert the short [] to byte [] ? would that be acceptable in order of voice quality?, is the above error a known bug for htc magic or the platform doesn't support 8bit audio format?

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Android :: Navigating An Array - String Array

Oct 12, 2010

I'm new to android developing but right now I'm working on an application that displays Random Facts. Since I don't want it to be in a random order, I would like to have them in a list. I would like to order through them one by one and show them using TextView.

Resources res = getResources();
myString = res.getStringArray(R.array.FactsArray);

That's what I have so far. If I'm right, that just establishes the array so I can be able to use it later. What I had before was rgenerator which chose a random string from the array and displayed it when I clicked a button.

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

But Like I said, I would like to just order through them one by one when a button is clicked.

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Android :: Convert JSON Array To Array

Jul 27, 2010

Is there a simple way to convert a JsonArray to a standard Java Array? Obviously, you can iterate and do it explicitly, but I wanted to see if there was a direct way to do so.

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Android :: Insert Array Into Array

Sep 13, 2010

In my android application i need to insert an array into an array and access its values. Is there any way that i can get this done.

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Android :: Using Volume Buttons In Application

May 20, 2010

I need to use volume buttons to control a variable parameter in my application. I use Activity.onKeyDown to get notified when the button is pressed but the media volume is also increased. Android is doing something like below when I press the volume key:
1. increase media / ringtone volume
2. pass the event to my application
Is there a way to avoid increasing the system volume and use volume key only for my application?

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Android : Flash Buttons In Droid Application?

Apr 17, 2009

Now can any one tell me like can i use flash buttons in android application? I mean swf format. If the answer yes kindly tell me how. As because i have tried this normally. But it was not working.

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Android :: Sliding Button Container For Application Buttons

Sep 3, 2010

I am running out of room on my application for buttons, so I want to stick them into some sort of sliding container, like the one at the top of the Astro File Manager application. How do I go about doing this?

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Android :: Application To Power Down Phone Without Using Hard Buttons

Nov 15, 2010

Is there an app out there that can power down the phone without having to hold the power button? I am not talking about reboots, I mean a full power down from using only the touchscreen?

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Android : How To Override The Behavior Of The Volume Buttons In An Application

Mar 2, 2010

I'd like to use the volume buttons for something else in my Android application. The Dolphin browser does this I am told.

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Android :: String-array - Resource Into A String Array

Mar 31, 2009

I just want to read <string-array> resource elements into a String array. I don't want to make a view or anything and mess with adapters - just want to transfer the elements. Is there a built in class for this? Or do I need to treat the resource file as a regular file?

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Android :: Placing Buttons - Place Four Buttons Near Top - Left - Bottom - Right Edge Of The Screen

Jul 29, 2009

I am not able to find out the perfect layout(viewgroup) to place four buttons as shown in the attached image. Basically, i want to place four buttons near the top/left/bottom/right edge of the screen. AbsoluteLayout helped, but it is deprecated (It is also better to avoid AbsoluteLayout as it is not very flexible for orientation changes)

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Android :: Header - Views And Buttons - How To Attach Listeners To Buttons In A Header That Does Not Have Its Own Activity

Jan 6, 2010

I have touched on this question here, where Christopher gave an answer to this, but I dont really get it so I thought its time to make it a real question, not just a "follow up" =)

As it stands, the application Im writing has 4 different screens:
1. Screen 1 - list of nodes (main screen)
2. Screen 2 - options menu, tableLayout with buttons
3. Screen 3 - navigation
4. Screen 4 - text details on version etc

These screens can be navigated to/from using a "header" View that is placed on top. the header then has 4 different buttons:

+--------------------+
| menu with buttons |
+--------------------+
| |
| |
| |
| C O N T E N T |
| |
| |
| |
+--------------------+

The header is just an XML-file (header.xml) with a few buttons. That header.xml is the included in the Layouts using the include-markup. For example, the main.xml has the line:

<include layout="@layout/header"></include>

The header show up alright, but the question is - what is the correct approach to attach OnClickListeners for the buttons in the header?

Christopher pointed out that you could create an Activity class and do the hooks there, like this:

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

First, I cant make it work since the method setupHeaderButtons isnt accessible from FirstActivity.
Secondly, is this the right way to go at it?

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Android :: Use GridView In PopupWindow?

Nov 10, 2009

I am having a similar issue while trying to use a GridView in a PopupWindow. On my Activity's onCreate method, I am inflating a gridview from xml as follows:

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

I would like this GridView to popup on a button click. Also inside of my activity's onCreate,

I have:

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

On button click, I am throwing a ClassCastException from GridView.onMeasure(int, int).

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Android :: Getting A Button Along With Gridview?

Aug 22, 2010

I have a gridview that is inflated by multiple buttons. I used just a gridview and it worked fine. The grid was in correct order and was centered. Although, I wanted to add a button below the grid of buttons that was different and centered. To do this I decided to section off the gridview and then add the button (therefore it wouldn't be affected by the gridview).

I tried the following code to seperate the views:

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

The problem is that this code smushes the gridview to the left and oddly it flips it (Position 0 is ont he bottom right and the last button is on the top left pushed off screen). The following image shows what is the result:

Any idea why its pushed to the left and flipped? Or maybe how I could have just the Gridview with the button on the bottom?

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Android :: ListSelector On GridView

Aug 24, 2010

I'm trying to use a custom listSelector on a GridView. When I use the default listSelector, I see that it modifies the size of my items so the listSelector display correctly. The list Selector is bigger than my items:

See how when using the default selecto, it make grid items to be resized. Above the gridview I have a LinearLayout with 4 of the same images(ImageView) the GridView contains. http://twitpic.com/2hxkjh

I wanted a custom listSelector, not as bigger as the default (that makes my items smaller), but bigger enough to simulate a border on them without overlap my items content. I'm, not sure if this is an expected behavior, but when I set the listSelector with my own image, I see the selector being fit to my items size. At least my items won't get resized. [url]

Any ideas of how to set a selector that doesn't get resized?

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Android : How To Use GridView With ScrollView?

Sep 16, 2010

I want to use GridView with Scroll View(which containing ListView)..

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Android :: GridView Row Height

Mar 3, 2010

I have a GridView that displays images, which are, unfortunately, of different sizes. They are shown in between two lines of text:

CODE:.........

If IMAGE1 is the same height as IMAGE2, everything is fine, but if IMAGE1 is longer than IMAGE2, text2.1 will run into text3.1 (padding doesn't seem to help much, as there's too much of it when images are of the same height).

I know there's a way to stretch the images in the ImageView so they are the same height, but is it possible to keep images as is and set the row height somehow?

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