I will be using a PIR sensor as a motion detection and the relay connected to 2 wires hard wired to either a button or key on a WM PDA or smartphone.
I have this working on a smartphone on the cursor up (Joypad).
What c# code do I need to:
Read the first keypress ( take a series of images)
Ignore all keypress until (take a series of images has finished).
Start process again
or
Read the first keypress ( take a series of images) until
Keypress has finished (ie the switch is open)
As a test I used two edit boxes. When the switch is closed the cursor moves from each textbox changing the text in the box.
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
MessageBox.Show(e.KeyChar.ToString());
}
private void textBox2_GotFocus(object sender, EventArgs e)
{
textBox2.Text = ("moved");
}
private void textBox1_GotFocus(object sender, EventArgs e)
{
textBox2.Text = ("moved again");
}
I can then action the camera call when textBox2.text is changed.
Any info appreciated.
SteveW
Related
A long time ago I wrote some code to work as a timer app for the camera on the Himalaya. I've had a couple of emails about this recently so thought I would post the important parts of code for firing off the camera here. Before it's lost forever as I have a Magician these days.
First I start the camera app:-
Code:
void CCameraTimerDlg::RunCameraApp()
{
// setup parameters for ShellExecuteEx
SHELLEXECUTEINFO sei;
memset(&sei,0,sizeof(SHELLEXECUTEINFO));
sei.cbSize=sizeof(SHELLEXECUTEINFO);
sei.hwnd=::GetDesktopWindow();
sei.lpFile=TEXT("\\Windows\\Camera.exe");
sei.nShow=SW_SHOW;
// start the camera app running (or if it's already running switch to it)
ShellExecuteEx(&sei);
}
Then get a handle to it's command window and take the photo:-
Code:
void CCameraTimerDlg::TakePicture()
{
// Find main Camera App window
HWND hCameraApp=::FindWindow(TEXT("WCE_IA_Camera_Main"),NULL);
// if we found it okay....
if (hCameraApp)
{
// find the Camera App's first child window (it's UI)
HWND hCameraSkin=::GetWindow(hCameraApp,GW_CHILD);
// if we found it okay ...
if (hCameraSkin)
{
// press the "take photo" button
::SendMessage(hCameraSkin,WM_COMMAND,0xBC4,0x00);
// wait while photo is taken
::Sleep(500);
// press "save photo" button
::SendMessage(hCameraSkin,WM_COMMAND,0xBD4,0x00);
}
}
}
and then quit the camera app
Code:
void CCameraTimerDlg::ExitCameraApp()
{
// find the Camera App's main window
HWND hCameraApp=::FindWindow(TEXT("WCE_IA_Camera_Main"),NULL);
// if we found it okay, ask it to close
if (hCameraApp)
::SendMessage(hCameraApp,WM_CLOSE,0,0);
}
In my Android app, I have a sound that I want to play when a certain selection has been made from a spinner, but I want it to play the when the user actually makes the proper selection (or just after). My problem is that although the sound does play when they make the correct selection, as long as that selection stays chosen, it also plays every time the app starts up, when it should ONLY play at the time it's chosen. I think I need to change my setOnItemSelectedListener to setOnItemClickListener, but I'm not sure how (still pretty new to java). Can any generous soul out there show me how to change this up (assuming that's how to best solve this problem)?
Here is the code I have now:
Code:
fitnessSpinner = (Spinner) findViewById(R.id.fitness_spinner);
ArrayAdapter adapter4 = ArrayAdapter.createFromResource(
this, R.array.fitness_array, android.R.layout.simple_spinner_item);
adapter4.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
fitnessSpinner.setAdapter(adapter4);
fitnessSpinner.setOnItemSelectedListener(new OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long i) {
Log.d("test", "p: " + position + " " + i);
if(position == 0) {
//First Entry
MediaPlayer mp = MediaPlayer.create(mContext, R.raw.bowchica);
mp.start();
} if(position == 4) {
MediaPlayer mp = MediaPlayer.create(mContext, R.raw.debbie2);
mp.start();
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
I haven't try the below code but you can try it on your own and tell us.
In onCreate() declare MediaPlayer mp;
In every if statement that you use for check insert this code:
Code:
if(mp!=null){mp.release();}
int resid = R.raw.yoursound;
mp = MediaPlayer.create(this, resid);
After that override the methods onPause() and onResume() and insert this:
if(mp!=null){mp.release();}
If it is still playing a sound when you start your app, then you should check your code again if you have set as default option any of your selection options.
I would LOVE to try this out...Unfortunately, I'm way too dumb at this point point ot figure out exactly where those code snippets would go inside of what I already have.
Does anyone have a couple of minutes to show me where it would go?
Below is a sample code. Since i don't know your code I give you a snippet that you should adjust it to your code.
Code:
public class SampleSound extends Activity{
private Spinner fitnessSpinner;
private MediaPlayer mp;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);//here goes your layout
setViews();//here you will set all your views(spinners buttons textviews etc..)
setAdapters();//set your adapters here
setListeners();//
}
private void setListeners() {
fitnessSpinner.setOnItemSelectedListener(new OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long i) {
Log.d("test", "p: " + position + " " + i);
if(position == 0) {
//First Entry
if(mp!=null){mp.release();}
int resid = R.raw.bowchica;
mp = MediaPlayer.create(this, resid);
mp.start();
} if(position == 4) {
if(mp!=null){mp.release();}
int resid = R.raw.debbie2;
mp = MediaPlayer.create(this, resid);
mp.start();
}
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
}
private void setAdapters() {
ArrayAdapter adapter4 = ArrayAdapter.createFromResource(this, R.array.fitness_array, android.R.layout.simple_spinner_item);
adapter4.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
fitnessSpinner.setAdapter(adapter4);
}
private void setViews() {
fitnessSpinner = (Spinner) findViewById(R.id.fitness_spinner);
}
public void onResume(){
super.onResume();
if(mp!=null){mp.release();}
}
public void onPause(){
super.onPause();
if(mp!=null){mp.release();}
}
}
I really appreciate the help. I put the code in my routine, but it still plays the sound every time the activity is loaded (as long as the selection in the spinner is correct). It should only play the sound when the correct selection is made.
Any other ideas?
I am sure that your Spinner is set to some value (since you have values to display). Because your Spinner points to a selection (doesn't matter if you have selected or it is selected by default) your sound plays (even when you start the app).
A way to stop the sound playing at start is to declare and an other Item like you did with the previous 4 and set it as default selection of your Spinner.
To sum up:
1.You have to append in R.array.fitness_array an Item (like you did with the previous Items) and give it a name.
2.At the end of method setAdapters() insert this:
Code:
fitnessSpiner.setSelection(5);// or whatever is your selection number
Now it should work but you should know that this is not a good practice and you should try make a ListView or something else.
I'd be happy to change this out to a listview, or whatever would work. I just have to give my user a choice of 4 or 5 items, from which they can choose only one. Something like a drop down box, but in Android, I thought my only option was a spinner. But whatever I use, I have to be able to play a sound when certain items are chosen, but ONLY when those items are chosen, NOT whenever the activity is called up.
Any specific ideas of what I might change to?
What if I had another control like a textview or an edittext (with it's visibility property set to false) that I programatically populated with the users selection (when it's the selection that I want) and then have an OnItemClcickListener set to play the sound?
Could that work?
I will answer from the last to the top of your questions.
1.You can do whatever you want with android. You want TextViews and EditTexts with complex and nested Layouts you can do it. Write services that will communicate with your contacts through a content provider? You can do it.
Write, read and test code. Only this way you will actually learn.
2.Read developer.android.com. Read the android tutorials from there and specifically the Notepad example. You will learn a lot.
A good resource with small examples for ListViews is this.
3.Have you tried the changes I told you from the last post? Did it worked?
Since you just started with android and programming you must first be happy if you have the expected result and then read more to make your code better
Your suggested changes (fitnessSpiner.setSelection(5);// or whatever is your selection number) would stop the sound from playing, but defeat the apps purpose. Every time this activity is loaded, the spinners hit preferences to load the previously stored data. So if I force the spinner to a different selection to NOT play sound when the activity loads, then I would be displaying the wrong data for the user.
Yes you are right. So it is better to make a ListActivity. Read developer.android.com and the link i gave you before. You will be ok with this!
You're using "setOnItemSelectedListener", which sounds like when the app starts, its getting "selected" again.
Have you tried using "setOnItemClickListener" instead?
fitnessSpinner.setOnItemClickListener(new AdapterView.OnItemClickListener () {
public void onItemClicked() {}
};
Lakers16 said:
You're using "setOnItemSelectedListener", which sounds like when the app starts, its getting "selected" again.
Have you tried using "setOnItemClickListener" instead?
fitnessSpinner.setOnItemClickListener(new AdapterView.OnItemClickListener () {
public void onItemClicked() {}
};
Click to expand...
Click to collapse
onClickListener doesn't work for the spinner...I wish it did.
I REALLY need the drop down functionality of teh spinner, so I guess I'm going to try and figure out a way to have an invisible edittext that I set to the spinner selection and then use onClickListener or onChange...
Hey guys,
Is there any way to get the Android browser to handle key presses the same way a normal browser would? I'm mostly thinking about the arrow keys here. Usually, it just moves to the next link on the page. For example, try loading slides.html5rocks.com on an android device. Pushing the arrow keys should move to the next slide but instead it just highlights the links on the first slide. I'm trying this with a bluetooth keyboard but I assume it's the same on devices with physical keyboards.
On a side note, that website allows for swiping between slides. However, it does not do this when loaded in a desktop browser. Does anyone know how they did this?
Thanks
Edit: I just noticed that I posted this in the development section. I probably should have been in general. Sorry!
What exactly you want to get? Referenced site (html5rocks) work well (switching slides and so on) in HTML5 compliant browsers. For example in Google Chrome or in Firefox. Actually in Firefox 3.6.17 (version that I've tested) it works not exactly as expected but the mostly. And in my Android builtin browser it works probably as proposed. Left/right dragging gesture (on touch screen) has the same effect as pressing right/left button in desktop browser - swapping to the next/previous slide.
Anyways, if you'd like to deal with browser events, you probably should look at WebView class.
Yes, perhaps this was a bad example. What I'm wondering is if it is possible for android to interpret the arrow keys on a physical keyboard the same was as a desktop. This this particular example, you can just swipe, but I would like to be able to use the arrow keys on my keyboard to do this, just like I would on a desktop.
Maybe a better example would be http://htmlfive.appspot.com/static/gifter.html
this is impossible to use in android
the arrow keys should move your character, but they just scroll the page
I see... Well, the hack below should do what you want, but for some reason it doesn't.
Code:
public class WebActivity extends Activity {
private static final String TAG = "WebActivity";
WebView webView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
webView = (WebView) findViewById(R.id.webview);
webView.setWebViewClient(new HelloWebViewClient());
webView.getSettings().setJavaScriptEnabled(true);
webView.setOnKeyListener(onKeyListener);
webView.addJavascriptInterface(new JavaScriptInterface(), "Android"); // this is for debug only
webView.loadUrl("http://htmlfive.appspot.com/static/gifter.html");
// webView.loadUrl("file:///android_asset/gifter.html");
}
// This is for debug - redirect Android.log() javascript calls to Log.d().
// 'Android' here - is an 'interfaceName argument' of addJavascriptInterface() call above
public class JavaScriptInterface {
public void log(String message) {
Log.d(TAG, message);
}
}
private void simulateKeyEvent(String key, int code, boolean keyDown) {
Log.d(TAG, "simulateKeyEvent('" + key + "', " + code + ", " + keyDown + ")");
webView.loadUrl("javascript:(function(){var e=document.createEvent('KeyboardEvent');e.initKeyboardEvent('" + (keyDown ? "keydown" : "keyup" ) + "',true,true,null,'" + key + "',0,0,0," + code + ",0);document.body.dispatchEvent(e);})()");
}
OnKeyListener onKeyListener = new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
Log.d(TAG, ".onKey(): keyCode = " + keyCode + ", action = " + event.getAction());
int code;
String key;
switch (event.getKeyCode()) {
case KeyEvent.KEYCODE_DPAD_LEFT:
code = 37; // JavaScript KeyboardEvent.keyCode value for left arrow
key = "Left";
break;
case KeyEvent.KEYCODE_DPAD_UP:
code = 38; // ...
key = "Up";
break;
case KeyEvent.KEYCODE_DPAD_RIGHT:
code = 39;
key = "Right";
break;
case KeyEvent.KEYCODE_DPAD_DOWN:
code = 40;
key = "Down";
break;
default:
Log.d(TAG, "Unknown key");
return false;
}
boolean keyDown;
switch (event.getAction()) {
case KeyEvent.ACTION_DOWN:
keyDown = true;
break;
case KeyEvent.ACTION_UP:
keyDown = false;
break;
default:
Log.d(TAG, "Unknown action");
return false;
}
simulateKeyEvent(key, code, keyDown);
return true;
}
};
private class HelloWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
}
Looks like the problem is in the implementation of initKeyboardEvent() in WebKit (or V8?). It always produces KeyboardEvent object with 0 values of keyCode and keyChar. So this code doesn't working in my Chrome too: event is dispatched, appropriate handler is called, but keyCode is 0.
Probably there is some other way to simulate keyboard event for JavaScript running within WebView. Or maybe there is some way to redefine KeyEvent processing by WebView. I think you should look for something like this.
This is interesting subject. If you'll find a solution, please write here about it.
References:
http://developer.android.com/resources/tutorials/views/hello-webview.html - basics of WebView usage
http://developer.android.com/reference/android/webkit/WebView.html - WebView in more details
http://lexandera.com/2009/01/injecting-javascript-into-a-webview/ - about interacting with JavaScript from WebView
http://stackoverflow.com/questions/1897333/firing-a-keyboard-event-on-chrome (and many other topics) - about problems with simulating keyboard events on WebKit
this is really frustrating. No matter what I do, I just end up with keycode 0. google really needs to fix the problem with initKeyboardEvent. Oh well..
Thanks for you help
Hello. New here and I hope this post is okay. The "Is this a question?" checkbox says it not the QA forum but it is?
Working on an app that all it's supposed to do is repeat taking a picture every 5 seconds after pressing a button. Now, I've looked at handler, timer, etc but I can't figure out the right way to do it. This is the code currently, and the onCameraClick of course runs when the button on the screen is pressed. I want that button to activate some kind of repeater so the picture gets taken every 5000ms.
Code:
public class CameraImage extends Activity {
public static int cameraID = 0;
public static ImageView image;
[user=439709]@override[/user]
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.cameraimage);
image = (ImageView) findViewById(R.id.imgView);
}
public void onCameraClick(View v)
{
cameraID = 1;
Intent i = new Intent(CameraImage.this, CameraView.class);
startActivityForResult(i, 9999);
}
}
Now, this is something I'd definitely like to use but I'm not sure how to implement this correctly into the code above. Been trying trial and error for past few hours and nothing. Tried out a timer example someone put on another website, 10792454/image-capture-in-android-automatically but not much there.
At the same time however though, I'm not sure if the code should go in the other class with all the functions to run the camera. Any suggestions/tip or help I'd greatly appreciate it.
Try a loop. I'm not sure if you have tried this or if it will work with launching an activity, but it sounds like that is what you want to do. I don't know how you determine when to stop taking pictures but you can use a "for loop" or a "while loop".
example "for loop":
Code:
for (int i; i > someNumber; i++){
//Your code here
}
someNumber would be perhaps the number of pictures you want to take and you can use i to number each picture.
example "while loop":
Code:
Boolean buttonClick = false;
onCreate(){
OnButtonClick(){
OnClick(){
if(buttonClick == true){
buttonClick = false;
}else{
buttonClick = true;
}
onCameraStart(buttonClick);
}
public void onCameraStart(boolean runCamera){
while (runCamera == true){
//Your code here
}
}
This example I showed you how you would be able to start the camera on the first click and stop it when clicked again. The OnButtonClick would be the OnClickListener for your button.
Both these examples may need a little refinement but this should point you in the right direction. Hope this helps. You can put these in threads and pause the thread at the end of the loop for 5 secs so it will wait (I think).
It's simple use a timer and invoke it on first click
Sent from my GT-S5302 using Tapatalk 2
I've been trying to learn to program for Android lately by simply coming up with ideas and implementing them. It started out easy enough with pulling information from an online RSS feed and showing this in a nice environment. But the current idea has me stumped.
I'd like the following to happen:
Take a picture using intent
Entire picture is shown in a new activity
Zoom in on a certain spot
Add predefined items to the picture
Press next which connects the items from left to right
Add some more items
Press next to connect the new items
Zoom out
Save the image
First taking a picture, this wasn't too hard using the camera intent:
Code:
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
I can then extract the absolute path from fileUri with the following line:
Code:
String path = new File(fileUri.getPath()).getAbsolutePath();
This path can be put in a bundle which can be put in an intent which is then used to start the activity that should show the image.
Code:
public class TestActivity extends Activity implements SurfaceHolder.Callback {
private static final String TAG = TestActivity.class.getSimpleName();
private String path = "";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SurfaceView view = new SurfaceView(this);
setContentView(view);
Intent intent = getIntent();
Bundle bundle = intent.getExtras();
path = bundle.getString("path");
view.getHolder().addCallback(this);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
Canvas canvas = holder.lockCanvas();
if (canvas == null) {
Log.d(TAG,"Can't draw because canvas is null");
}
else {
Bitmap bitmap = BitmapFactory.decodeFile(path);
Paint paint = new Paint();
if(bitmap == null) {
Log.d(TAG,"Can't draw because bitmap is null");
}
else {
canvas.drawBitmap(bitmap,0,0,paint);
}
holder.unlockCanvasAndPost(canvas);
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int frmt, int w, int h) {
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
}
The first issue here is that it of course doesn't show the entire photo. Not that surprising considering it's larger than the view. Ideally I'd like to zoom out to show the entire photograph. Once I've zoomed one way I'd assume that zooming in on the part that you want should also be possible.
Next is adding the objects. My idea was simply catching any touch events and adding a new object once the finger is released. This way I'd end up with a list of items with each having a draw function which can be called through the surfaceview when it is redrawn.
Connecting these items could simply be done by creating a line object and going through the list of all items and using their locations for the begin and endpoints of the lines
One of the big issues here is that the x and y locations would be relative to the screen, not to the photo. Which would mean that when you zoom back out the entire background would change but the actual items would remain at the same spot and in the same size.
I've been searching and searching for any tutorial or other question about the same issue, but either I've had no luck or I've been using the wrong keywords. And for all I know everything I have up till now could be wrong.
If anyone could give some pointers, or maybe knows a guide or tutorial somewhere or some better keywords I could use for searching I'd really appreciate it.
Xylon- said:
One of the big issues here is that the x and y locations would be relative to the screen, not to the photo. Which would mean that when you zoom back out the entire background would change but the actual items would remain at the same spot and in the same size.
Click to expand...
Click to collapse
would you just not need to either control or track the sample/scale if the image so that you know the 1st pixel displayed (top left) and the scale factor, then the eventX/Y can be processed to be relative to what you want ?