I'm running an Wikitude application which shows the point if Interest
(POIs). When the application starts, I click a button to launch ARView
(AUgmented Reality) and there I could see the POI images superimposed
on the Live Camera images.
Now I want to change those images at frequent intervals.
I'm using :
// Need handler for callbacks to the UI thread
final Handler mHandler = new Handler();
// Create runnable for posting
final Runnable mUpdateResults = new Runnable() {
public void run() {
updateResultsInUi();
}
};
protected void startLongRunningOperation() {
// Fire off a thread to do some work
Thread t = new Thread() {
public void run() {
Pi.computePi(800).toString(); //Do something for a while
mHandler.post(mUpdateResults); //then update image
}
};
t.start();
}
But nothing is working. I'm sure I'm doing some mistake...
Thanking you all in advance.
When you say you are running a "Wikitude application", do you mean you are building an app using their publicly available on-device Android API (http://www.wikitude.org/developers)? If so, then dynamically changing the POI marker images is not supported. The AR view is an activity within the Wikitude app itself, launched via your intent. You have no further POI control (apart from callback intents) after the camera view is launched.
We can add our customized icons for a Point of Interest. Have you gone through the sample code provided by Wikitude?. There you can find a method startARViewWithIcons(). Just go through it once, Let me know if there is anything else.... Thanks & Regards, Raghavendra K
Related
I am trying to make an android app that captures photos after every 5 seconds. Currently the technique i'm using, uses the phone's camera app to capture the photo. It requires the user to capture the photo and then to press ok and only after that the control returns back to the android app. I found some codes to do the same without human interaction, but since i'm new to android, i'm not able to understand codes them because most of them are incomplete and divided into multiple activities. Can this be done using just one activity?
EDIT :
The codes mentioned above can be found here
I suggest to you to use this library (here documentation) instead the official Camera Api of Android that could be really tricky to use for beginners
Then your code could be like this
private final Handler handler = new Handler(); //This should be declared before OnCreate
private Runnable photoRunnable; //This also
CameraView camera = findViewById(R.id.camera);
camera.addCameraListener(new CameraListener() {
public void onPictureTaken(PictureResult result) {
//Handle result here!
}
});
photoRunnable = new Runnable() {
#Override
public void run() {
try {
camera.takePicture(); //The result will be in onPictureTaken
}
catch (Exception e) {
e.printStackTrace();
//Handle Exception!
}
finally{
//also call the same runnable to call it at regular interval
handler.postDelayed(this, 10*1000); //10*1000 is your interval (in this case 10 seconds)
}
}
};
//runnable must be execute once
handler.post(photoRunnable);
Remember to manage the lifecycle of handler
I am having a application which have a splash screen. My problem is i need a splash screen with the pinwheel spinner(progress bar). I have also added the android java code.
Java code
package com.SSF;
import android.os.Bundle;
import android.widget.Toast;
import com.worklight.androidgap.WLDroidGap;
public class SSF extends WLDroidGap {
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
}
/**
* onWLInitCompleted is called when the Worklight runtime framework initialization is complete
*/
#Override
public void onWLInitCompleted(Bundle savedInstanceState){
super.loadUrl(getWebMainFilePath());
// Add custom initialization code after this line
}
}
Having a splash screen is redundant, and should be avoided unless maybe it's the first run of the app. Users like to open the app and start using it right away.
Only really heavy apps (mostly games ) need to load a lot of things, but even there, there are plenty of optimizations to make it short (just load what it needs in the near future, for example).
Anyway, for the progress bar, just create a layout with a progress bar view in the middle, use "setContentView" on it, and that's it...
You can also customize the progress bar by yourself, for example using this post.
You can try this code. please
public class MainActivity extends Activity {
private ImageView splashImageView;
boolean splashloading = false;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
splashImageView = new ImageView(this);
splashImageView.setScaleType(ScaleType.FIT_XY);
splashImageView.setImageResource(R.drawable.ic_launcher);
setContentView(splashImageView);
// interesting music
/**
* Gets your sound file from res/raw
*/
splashloading = true;
Handler h = new Handler();
h.postDelayed(new Runnable() {
public void run() {
splashloading = false;
setContentView(R.layout.activity_main);
}
}, 3000);
}
Best of luck!
try below code:-
// METHOD 1
/****** Create Thread that will sleep for 5 seconds *************/
Thread background = new Thread() {
public void run() {
try {
// Thread will sleep for 5 seconds
// show progress bar here
sleep(5*1000);
// After 5 seconds redirect to another intent
Intent i=new Intent(getBaseContext(),FirstScreen.class);
startActivity(i);
//Remove activity
finish();
// hide progress bar here
} catch (Exception e) {
}
}
};
// start thread
background.start();
for more info see below link:-
http://androidexample.com/Splash_screen_-_Android_Example/index.php?view=article_discription&aid=113&aaid=135
http://www.androidhive.info/2013/07/how-to-implement-android-splash-screen-2/
Up until Worklight 6.2 it was not possible to customize the splash screen in a Worklight-based Android application, be it adding a spinner, extending the time the splash is displayed or creating an entirely customized experienced.
Starting Worklight 6.2 the entire flow is customizable if the developer so chooses. This is documented at: Managing the splash screen in an Android-based hybrid application, which also provides various code examples.
BTW, you already asked about this... Splash Screen with loading in four environment(android,ios,blackberry and windows) using html coding or common plugin for hybrid apps
I have been developing iOS apps for quite a time and now i have switched to android. I have a requirement in which I have to start timer(In think in Android, I need to use handler) when view appears(onResume) and invalidate timer(stop handler) when view disappears(onPause). I am able to create runnable Handler but not able to stop it.
My code is:
protected void AutoRefresh() {
try{
handler.postDelayed(new Runnable() {
public void run() {
new LongOperation().execute("");
}
AutoRefresh();
}, 60000);
}
catch(Exception ex){
}
}
Now, how can I stop this this handler thread when view disappears. Please also comment, if its not the right way to do timer implementation in android.
when view appears(onResume) and invalidate timer(stop handler) when
view disappears(onPause). I am able to create runnable Handler but not
able to stop it.
Keep a reference to the Runnable you use:
private Runnable mRefresh = new Runnable() {
public void run() {
new LongOperation().execute("");
}
AutoRefresh();
}
//...
protected void AutoRefresh() {
handler.postDelayed(mRefresh, 60000);
}
and in onPause remove it like this:
handler.removeCallbacks(mRefresh);
Keep in mind that this will not remove the currently Runnable that is being executed(if any) so in the LongOperation's onPostExecute method you might want to check if the Activity is still available before refreshing the UI or doing any other interaction with the Activity.
Please also comment, if its not the right way to do timer
implementation in android.
You seem to need to do an action at a certain interval of time and using a Handler is the way to do it, I don't think a timer is what you need.
I am making a simple Android program that runs mnemonics or math exercises for training purposes.
I have a "new exercise" button that changes question and answer. I want to implement a "text to speech" mode, where the software reads the question and the answer. After they are spoken, it should calculate a new question and start again.
I am using OnUtteranceCompleted to determine if the speech has ended. My problem is that I can’t access my "new exercise" button from the callback.
I am using this:
private TextToSpeech.OnUtteranceCompletedListener onUtteranceCompleted = new TextToSpeech.OnUtteranceCompletedListener()
{
#Override
public void onUtteranceCompleted(String utteranceId)
{
if(0 == utteranceId.compareToIgnoreCase(END_OF_SPEECH))
{
Log.i("TTS","Completed");
if (TTSMode == TTS_MODE_ON) {
//Start new
Log.i("TTS","TTS mode is on: start new exercize");
NewExercize();
btnNewEx.performClick();
}
}
}
};
I got the following error:
$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
I am able to generate the new question/answer, but I can’t use the button to change the fields with the new question or answer, wich are used by the TTS engine.
Any ideas?
You need to use runOnUiThread:
context.runOnUiThread( new Runnable() {
public void run() {
btnNewEx.performClick();
}
});
(you can omit "context." if "this" is an Activity or Service subclass)
I am now working on an android app in which I need to display a text after some processing is done.
I'm using a Thread to run a process in the back while my progress dialog is being displayed to the user. The Thread works properly and I've followed it step by step and, apparently, it also ends fine; however, the method in which I call it does not seem to come to an end (at least, during a normal cycle) because the text I am setting afterward does display immediately, I have to wait and do some other action (like in order for it to display
Below is the piece of code I'm having trouble with:
private OnClickListener saldoDisp = new OnClickListener(){
public void onClick(View v){
int x = s2.getSelectedItemPosition();
branchSel = arrSucsId[x];
mainProc();
saldoAdminTex.setText(strSaldo); //The late one
}
};
public void mainProc(){
chekP = new Thread (null,doProc,"Background");
chekP.start();
mProgress =ProgressDialog.show(SivetaAsaldo.this, "","Obteniendo saldo...",true, false);
}
private Runnable doProc = new Runnable(){
public void run(){
if(getSaldoAdmin(levelSel,branchSel))
{
mProgress.dismis();
Log.i(TAG,"Task completed properly");
}else
handler.post(tosti);
}
};
So I do get the "Task completed properly" but seems like it still waits for something else, any clues guys?
Thanks for taking a bit of your time to check it out =).
saldoAdminTex.setText(strSaldo); //The late one
is going to get called immediately. It doesn't wait until after the Thread started in mainProc ends. You also cannot dismiss the Progress Dialog in your runnable. You can only do UI related things on the main UI thread.
It would help you to read the article on Painless Threading on the Android Dev site.
About your ProgressDialog, please see this answer about how to use a AsyncTask with a ProgressDialog.
Looking at your code, this:
saldoAdminTex.setText(strSaldo);
would potentially be executed before your thread finishes as the thread will be running in parallel to that line.
An alternative way would be to do this:
public void mainProc(){
mProgress =ProgressDialog.show(SivetaAsaldo.this, "","Obteniendo saldo...",true,false);
handler.post(new Runable(){
public void run(){
if(getSaldoAdmin(levelSel,branchSel))
{
mProgress.dismis();
saldoAdminTex.setText(strSaldo);
Log.i(TAG,"Task completed properly");
}else
handler.post(tosti);
}
});
}