I use a boolean variable "flag" both in main and child thread. This "flag" is used to notify child thread to exit. I only use simple operation, e.g., "flag=false", "if (flag) {}". As I know, in java, "get and set a boolean variable" is atomic. So "synchronized" is not needed for variable "flag", declaring "flag" as "volatile" is enough.
Is this still true in Android?
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What is the difference among bool, boolean and Boolean in Java/android.
View 2 Replies View RelatedIs copying the reference to the object and not the value of the object. Meaning, when I modify pos.top or pos.bottom, the original object gets modified. I'm guessing I am missing a concept of pass object by reference vs value here which I thought I understood. What is the fix here? Is it a problem with how I defined my custom class?
View 2 Replies View Relatedthese is how to give a string as argument String link ="http://www.adobe.com /devnet/acrobat/pdfs /pdf_open_ parameters.pdf"; webview.loadUrl(link);But how to give an "URL" variable to load its content to webview.
View 1 Replies View RelatedI want to have the status of a checkbox be saved into my prefs. I set a listener on the checkbox, and if it is checked I do a prefs.putBoolean("cbstatus", true), and it is it unchecked i do a prefs.putBoolean("cbstatus", false); Trouble is, in my onStart() when I get prefs, my Boolean getcbstatus = prefs.getBoolean("cbstatus", false); will always return a true, regardless of how my listener should have set that status previously.
What am I doing wrong? I have working prefs for other things like spinners, textviews, and edit texts, but what should be the simplest type (a boolean) is giving me a hard time. I've even tried taking out all code related to listeners and pref setting for this checkbox, so that the only code in the entire activity that deals with the checkbox is in the line
Boolean getcbstat = prefs.getBoolean("cbon", false);
if (getcbstat = true) { cb1.setChecked(true);
} else { cb1.setChecked(false);
format.setVisibility(View.VISIBLE);
}
Since there is no cbon preference (i deleted them all), it should return false by default and the box should be unchecked since. cb1, of course, is the name of my checkbox. Update on the code:
OnClickListener cb = new OnClickListener() {
public void onClick(View v) { if (cb1.isChecked()) {
prefs.putBoolean("cbon", true);
} else { prefs.putBoolean("cbon", false);
} } };
And in the onStart():
Boolean getcbstat = prefs.getBoolean("cbon", false);
cb1.setChecked(getcbstat);
What does this line from the following code sample mean? "synchronized (_surfaceHolder) {_panel.onDraw(c);}"
I can guess what it does, but what is it called and how does it works? Is it a nameless synchronized function? Code...
In android, most event listener methods return a boolean value. What is that true/false value mean ? what will it result in to the subsequence events ?class MyTouchListener implements OnTouchListener {@Override public boolean onTouch(View v, MotionEvent event) {logView.showEvent(event);return true;}Regarding to the above example, if return true in onTouch method,I found every touch event(DOWN,UP,MOVE,etc) has been captured according to my logView. On the contrary,if return false, onely the DOWN event been captured. So it's seemd that return false will prevent the event to propagate. Am I correct ?Furthermore, in a OnGestureListener, many methods have to return a boolean value too. Do they have the same meaning ?
View 3 Replies View RelatedHow can I obtain the value of a boolean field in a sqlite database in android?
I usually use getString() getInt() etc to get the values of my fields, but there does not seem to be a getBoolean() method. Any takers?
I'm coming from .NET world, and unfortunately looking Java source with .NET's eyes. Following code is from Android Apps (though not Android specific at all):
private class Worker implements Runnable {
private final Object mLock = new Object();
private Looper mLooper;
Worker(String name) {
Thread t = new Thread(null, this, name);
t.start();
synchronized (mLock) {
while (mLooper == null) {....................
I am facing a problem with a stopping thread which is in a synchronized block. I am using TCP socket. The problem is that I am waiting on a DataInputStream object and I want to create a new socket again but it doesn't allow me to do because of the synchronized block.
I have tried with Thread.interrupted(). I cannot avoid the synchronized block. Is there any other way to do the same?
dis = new DataInputStream(ReadWriteData.kkSocket.getInputStream());
int i = -1;
String aval = ""; //new String();
char c = (char)dis.read();
It is getting blocked on dis.read().
What I should do for escaping the dis.read when I want to create a new socket?
how to develop an offline sync app using the OpenMobster Sync Plugin for the PhoneGap framework. You can develop your App using HTML5 and Javascript instead of the native programming language.
Features:
-two way synchronization between the local sqlite database and the corporate backend in the Cloud
-Offline mode operation. All data changes are tracked and auto synchronized with the Cloud once the connection returns
-Use of Push notifications to push data changes from the Cloud to the device
-Support for replicating changes to multiple devices like iCloud does
-A Java based Channel Framework for integrating your backend with the Cloud
I'm trying to set the selection of a Gallery in code. I would like to have the Gallery smoothly roll down a few items over the duration of a second or two. At frist glance, it appears that two members would to the trick:Gallery.setAnimationDuration(int animationDurationMillis); Gallery.setSelection(int position, boolean animate); It turns out that the setAnimationDuration only seems to affect the rubber-bandy "return-to-center" effect of the Gallery. In other words, when a gallery comes to rest after a fling, and a gallery item is off center, the animationDurationMillis is used to control the duration of the Gallery centering up the item. However, the value seems to have no effect on the setSelection. No matter what value is set with setAnimationDuration, the Gallery seems to render about 2 or 3 frames when flying between items 1 and 10 for example. Is this working as designed? Does anyone know a trick or workaround that would let me properly animate setSelection? I'd be especially grateful if we could do it with an "Ease Out" effect.
View 3 Replies View Relatedim using 2 threads, one is writing floats and one is reading this floats permanently. my question is, what could happen worse when i dont synchronize them? it would be no problem if some of the values would not be correct because they switch just a little every write operation. im running the application this way at the moment and dont have any problems so i want to know what could happen worse?
a read/write conflict would cause a number like 12345 which is written to 54321 and red at the same time appear for example as 54345 ? or could happen something worse?
(i dont want to use synchronization to keep the code as fast as possible)
Pretty pissed off by the youtube app in X10.
Sound is always late by about 0.3s.
Its a real turn off to see the mouth move first, then hear the sound.
Is there any other apps which I can watch youtube in high quality, without facing this sound problem?
Or is there another better apps out there?
I'm looking into writing simple graphics code in Android and I've noticed some synchronized() blocks. What is the reasoning behind this and how do I know when I should be "synchronizing" my code?
View 1 Replies View RelatedI am trying to create an item list, diffrent for each i and j variable. My code is: I get an error in the line .setItems(items,: items cannot be resolved I think that the compiler thinks that the CharSequence[] items may not be initialised or something. How can I make this programme run?
View 6 Replies View RelatedI am working to set a countdown timer. I have successfully (borrowed) a number picker (spinner) and set up the dialog box for the user to set the time. This is in a class called timepickactivity and the variables are hour and mins (R.id.hour and R.id.mins). I want to call the set values (R.id.hour and R.id.mins) from the dialog (timepickeractivity) to the actual countdown class (countdown) but I can't figure out how to get the values.
View 4 Replies View RelatedHas anyone set the Classpath variable in Eclipse?If so, where is it?
View 4 Replies View RelatedI have some xml files, and I keep them in raw folder. Now, the problem is that I have to use them with variable name according to my application condition. But I don't know how to fetch them. The main thing is that I am not getting that how to give the path of my xml file in application.
For example:
My file application.xml is stored in the raw folder and I have to access it with a variable name.
String xmlName= application.xml;
How can I fetch my xml through xmlName variable?
I'm trying to use a Condition Variable to control the execution sequence of two threads. I can create a Condition Variable in one thread and block on it. But I would like to be able to access it from another Thread and unblock it from that thread.. ? Blocked Thread i am planning to keep as GUI thread and it should update the messages which are sent by b/g thread on the screen during its block state and will be unblocked by b/g thread in the end by calling open(); method.
View 3 Replies View RelatedI have this code:
hubSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parentView,
View selectedItemView, int position, long id) {
final MediaPlayer mp2 = MediaPlayer.create(Textbox.this, R.raw.hero);
mp2.start(); } public void onNothingSelected(AdapterView<?> parentView) {
} } );
(The code basically runs when a new item is selected of a spinner and then plays a song, which later will be a variable based on what was picked, but I'm fine as it is for now). And I want to be able to use 'mp2' out of this public void, (I want a button which pauses it). How can I do this?
Anyone know of an audio player that will speed up the playback? It would be nice if it could keep the pitch the same but sped up is the goal. I used TCPMP on the Treo. This is great for listening to podcasts in a fraction of the time. Depending on the original audio, I can generally make everything out up to +25%.
View 4 Replies View RelatedI'd like to make a preference screen with a variable number of preferences, very much like the WiFi selector. A number of profiles should be clickable and possible to edit and in the bottom there should be an add profile button. Has anyone got any tips on how to accomplish this? All I've found is this: http://groups.google.com /group/android-developers/browse_thread/threa.
View 4 Replies View RelatedI have noticed in my application(s) that after a call to Activity.finish() that the static variables that I declared in my classes still hold the values that they were changed to during the activity's life cycle. Upon the re-launch of the activity, the program does not re-instantiate the variables as declared or set them to the default java behavior. Is there something that I can do to cause this to happen, other than re-setting every static variable in my application?
View 3 Replies View RelatedI am doing an app related to football. I have a list view that will have various rows representing teams. In my custom array adapter I want to write some code that will present an icon for the team represented by the row. I have a drawable resource for each team (for instance for Indianapolis, Ind.png). In my code I can't refer to "R.drawable. Ind" because the Ind part is dynamic. That value would be in an array, like TeamArray[position]. As I expected, I certainly can't use R.drawable.TeamArray[position] because it won't even compile, it expects a literal name from the drawable folder. Is there a way to do this?
View 8 Replies View RelatedIs there a way to have 1 onClick Lister for many buttons where I can toss a case statement to do things based on what buttons were clicked.
I know I can make 100 different listeners for 100 buttons but I have to think I can create some nifty variables to do it in less lines of code.
I want to setImageResource for an ImageButton programatically, based on a variable.
For eg: if size=5, I want to setImageResource to R.drawable.five if size=6, I want to setImageResource to R.drawable.six
Unfortunately, I have too many of these, so an if-else or switch gets tiring.
Is there a way to achieve something like: R.drawable.size?
For now I've used the classic export command to set an environment variable and tried to read this variable from my test with System.getenv() function, but it doesn't seem to work. how to set and read a system variable in an Android application?
View 3 Replies View RelatedI seriously need help with a quite strange problem. I created a client which communicates with a server. Therefore, I have three classes. An activity providing a nice dialog to configure some data, a background service which checks the connection status periodically and a server class which handles the socket connection. Originally, the background service owned a server connection object but because I could not manage to provide data from the activity to the service, I decided to create the server connection class as singleton. The user is now able to change data in the activity (IP, Port, Username, Password) which shall be transmitted to the server object, if the save button is pressed. The data is read correctly, the activity calls the setter of the server class and the logcat also says that this data is correctly applied to the variable that stores the data in the server class. However, if I try to start the socket connection still the old values are stored in my variables although they've been overwritten before. What I am doing wrong, or how can I fix this?
View 13 Replies View RelatedHow is declare global variable in android...some link send me...am searched various post..but am not clear about dis concept...send me valuable link..
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