I'm trying to create an app that runs on a main thread, but also has a background loop running (to check for a connection). I just want to call a certain function onCreate, and that function should run in the background...I've tried with the code below, but doesn't seem to work?
void doStuffBackground()
{
Thread testingForBluetooth = new Thread()............
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I want to call a method every X minutes, if my method got a result it ´should inform the user by vibrating or showing a alertbox. if the method doesn't get a result it should wait for X minutes and restart. What is important, this should also work when the phone turns to sleep. Which means I want to wake the phone from sleep to run my method. Actualy I can activate my method via a Button, and it is working like I want it to be except the background loop thing.
I already searching for a solution here in the group or also on google but I think I don't got the right search terms to find a solution for my problme. I already read about the AlarmManager and broadcast receiver but I'm not sure if this is right for my problem.
I tried doing a ProgressBar and I wanted to change the background and the progress bar using my own drawables from the drawable resource. Is this possible? I just don't want to spend time creating my own custom component if can be done relatively easy.
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View 10 Replies View RelatedI have been trying to reuse the tutorial on the Android developer website about developing a TabActivity App but, unfortunately, it never worked, even when I constructed it the exact same way as it is described...
Using the debugger it seemed the problem came from the main layout.
-> setContentView(R.layout.main); //After this line the app stops.
Here is my main.xml:
CODE:.............................
I haven't seen any docs on using the new ContactsContract API. Can someone please direct me to an example/explanation of using it?
View 1 Replies View RelatedI'd like to build an application that loads different urls in a webview. I prefered the webview cause that gives the chance of deleting cache and things like that. But loading an URL in a loop has the effect that everything but the webView is executed, till the end of the loop. for(int i = 0; i < 10; i++) {WebView ansicht = new WebView (getBaseContext ()) ansicht .loadUrl(adress.toString());setContentView(ansicht); ansicht.clear Cache(true);sleep(15000);System.out.println("instead something else");
View 3 Replies View RelatedDoes Android have a special way to loop an application every 1 minute? Or do you know of any applications (with source) that I could look at? Apparently if I use Thread.sleep(1000*60); the application may time out on me and need me to click a wait button - I just want it to keep looping forever. Apparently the when you sleep() a thread it stops running for the time given
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Here I draw a bitmap which will move to right a little bit in each loop.
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View 6 Replies View RelatedI'm betting im missing one small thing. I've looked on the developer site and i've read some tutorials and i'm just not seeing what i did wrong. I'm trying to use a ListPreference to decide which sound to play on a button click. I have this at the top:
public String greensound;
Here's my OnClick code:
case R.id.green:
SharedPreferences prefs=PreferenceManager.getDefaultSharedPreferences(this);
greensound = prefs.getString("greensound", "gsone");
if (greensound == "gsone") {
mSoundManager.playSound(1);
} else if (greensound == "gstwo") {...................
I try to write an simple animation by using a handler.However whatever I try it does not function asynch which causes only the last image in the sequence being displayed.
CODE:...........
However it seems that all painting is done after the handler is completely done, meaning that the second image is shown and not the first.
I also tried the message handler implementation from the Snake sample but also here not with the expected result.
Can anyone give me an idea to show an image for a short definable period and switch back to the original image?
I am new to development with android. I am a beginner. I have to develop games using android and opengles. Please send me a simple game with step by step approach. please help me in this.
View 2 Replies View RelatedI'll get straight to the point. Please note that I haven't code anything in this project just yet. This is only an idea. In human language, my goal is to: 1. Take a picture of a blank white A4 paper. 2. Verify (by code) that the picture is "White". (this's why I include 'simple' in the topic) I mean, the program should be able to tell if the user just took the picture of "white" paper and not any other colors. For the code... I can guess that the actual process should be: 1. Use Camera API to take a picture. // this step should be easy 2. Convert it to Bitmap. // this step should also be easy 3. Verify that it is "White". //*** now I need some help here. How can I do step 3? I look up the docs and found this is the Bitmap class: getPixels (int[] pixels, int offset, int stride, int x, int y, int width, int height) I can use this and compare the data pixel-by-pixel but it seems expensive. Could anyone recommend me a more proper way(if there is) to do this please?
View 4 Replies View RelatedHow do I do a simple sleep() in Android? e.g. in Perl:
sleep 5;
to sleep for 5 seconds. I have a program that continues scanning wifi until it finds a certain router then plays a tune once found. All works fine, but it scans in 1.6 EXTREMELY fast, where as on 2.0 it scans about once per second. I also made a stop button that does:
mainWifi.setWifiEnabled(false);
But this causes a force close. ? actually every application I have made so far except hello world just gives me a force close. I have checked my permissions in the manifest etc.? I have a soundboard app that cannot play more than 7 sounds before it force closes? why?
Is it my phones hardware?
I am new to android i have develop a some e book for android mobile but i never develop a game in android and i would like to develop a first simple just like tic toc . so plz help me where can i start with.
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Refer some good tutorial.
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View 4 Replies View RelatedI'm putting together a simple test made up of two tutorials available online for OpenGL ES on Android. This is really just so that I can learn about the basics of OpenGL ES to better understand how I have to design my program.
Right now, when it tries to render, the mouse movement effect works, but I get no square drawn on the screen.
Here are the two source files I'm dealing with:
CODE:.......
The second one is the tile object itself:
CODE:........
I've been writing a simple drawing App as homework for university. Drawing works fine, but the canvas should also be cleared when the App is coming back from the background. When switching back i get the following code...
View 2 Replies View RelatedI'm sure I am missing something simple...
Background:
I am new to android and UI design, and I just wanted to play around with layouts. Right now I want to stack a checkbox on top of text label. I am using the following xml layout which works fine:
CODE:................
My Tests (just to get a feel for how things works):
Scenario 1) When I set the CheckBox's layout_height to "fill_parent", the CheckBox takes up the whole screen and is aligned center (i.e. - the TextView disappears).
Scenario 2) If I instead set the TextView's layout_height to "fill_parent", the CheckBox does NOT disappear. In fact, nothing disappears, and the layout looks the same as the above xml where everything is pushed to the top-left.
The Question (and comments): How come Scenario 1 works the way it works?
This behavior seems inconsistent to me. I thought that fill_parent is only supposed to let the element fill up whatever space is available in the parent. So to me, it seems that the TextView should get whatever space it needs (since it is wrap_content), but the CheckBox should take up the rest of the space (so the TextView would be forced to the bottom of the screen, but not invisible). In other words... Scenario 2 makes sense to me, but scenario 1 does not.
I would like to make a very simple Android app, with no UI. Kind of a shortcut. I tried searching the web, and I didn't find what I was looking for.
The question is: Can I make a simple app, that only launches an activity?
I want to make an app to launch the following activity : "com.cyanogenmod.trebuchet.preference.Preferences" . Kind of how the app "QuickShortcutMaker" works.