I'm using android N and I'm trying to turn on wifi hotspot when the user opens the application. I was able to turn on the hotspot using the code that I mentioned below but other mobiles are not able to connect to this network, they stuck at Obtaining IP address.
Functionality
public void changeStateWifiAp(boolean activated) {
Method method;
try {
method = wifiManager.getClass().getDeclaredMethod("setWifiApEnabled", WifiConfiguration.class, Boolean.TYPE);
method.invoke(wifiManager, wifiConfiguration, activated);
} catch (Exception e) {
e.printStackTrace();
}
}
Related
The requirement is to create a desktop notification which can register a click-event. I cannot use web-sockets or any browser notifications.
I am unable to use Tray-Icons and SystemTray because they cannot register Click-Events on DISPLAY MESSAGE. They can have click-events on the trayicon but not on the display message. The closest example - "When we register a click on a Skype message, it opens Skype for us"
Screenshot
On clicking the above Notification Skype chat opens-up. The same functionality is not supported with Tray-Icons. Either a work around it or a new approach will be do.
Hope I am clear thanks.
I used the following repository from github DorkBox.
Simply add maven dependency as instructed on the github link. However, I was unable to check how to change the UI for the notifications.
Notify.create()
.title(text)
.text(title)
.position(Pos.TOP_RIGHT)
.onAction( new ActionHandler<Notify>() {
#Override
public void handle(Notify value) {
if (Desktop.isDesktopSupported() && Desktop.getDesktop().isSupported(Desktop.Action.BROWSE)) {
try {
Desktop.getDesktop().browse(new URI(targetUrl));
} catch (IOException e) {
e.printStackTrace();
} catch (URISyntaxException e) {
e.printStackTrace();
}
}
}
})
.hideAfter(5000)
.shake(250, 5)
.darkStyle() // There are two default themes darkStyle() and default.
.showConfirm(); // You can use warnings and error as well.
Add the following code in your main block and you are good to go.
I'm developing an app with different views populated with data acquired from a Server API. As of right now, I've come up with a 'solution' as to how to make the most out of the multicore Android devices that are currently available. I thought that a Producer/Consumer strategy was the right choice for this problem. However I'm using as many consumers as the Phone has cores and when executing the application everything works fine. But in some cases the application dies and doesn't do anything when I launch it, if I clear the RAM on my device I can launch the application again.
Consumer run method:
while(true) {
lock.lock();
while(queuedOperations.isEmpty()) {
ma.debug("Slave " + slaveId + " is waiting for requests.");
try {
slaveCondition.await();
if(doTerminate) { return; }
} catch (InterruptedException e) {
e.printStackTrace();
}
}
ma.debug("Executing Request... " + slaveId);
JSONRequestParam[] params = queuedOperations.poll();
ma.debug("Polled an item. " + slaveId);
lock.unlock();
ma.debug(request.execute(params)); // returns a String.
}
Using the following shutdown method:
public void destroy() {
ma.debug("Terminating all external resources...");
lock.lock();
this.doTerminate = true;
slaveCondition.signalAll();
lock.unlock();
try {
service.awaitTermination(10, TimeUnit.SECONDS);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
service.shutdown();
}
The way I trigger the Consumers is by a signal from the Condition class. Here's the code:
public void submitRequest(JSONRequestParam... params) {
lock.lock();
queuedOperations.add(params);
slaveCondition.signal();
lock.unlock();
}
I overrided the onBackPressed method in the main activity as well;
#Override
public void onBackPressed() {
try {
JSONRequestManager.getInstance(this).destroy();
} catch (Throwable e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
super.onBackPressed();
}
but to no avail. The application is very buggy and unstable. I have tried to find a replicate of this problem here and on numerous of different sites, couldn't find anything that helped. I'm almost sure there's no deadlocks in this application, I have a reasonable amount of experience working with concurrent applications, however Android is a tad bit different when it comes to threading...
Is there any hints or practices that I'm missing out? Why is the application working when the RAM is cleared and on first launch? Is there something jamming in the background? I really do not know. I hope you can tell!
Any help is greatly appreciated!
I am attempting to use AccountManager to get a token for an installed Google account. When I call getResult() on my AccountManagerFuture object, I get the "Couldn't sign in" screen on the device (which further says, "There was a probem communicating with Google servers. Try again later.). I checked that a network connection is available prior to calling this method. I also checked on the device that I am able to access, e.g. google.com, in the browser. Here is the code for my AccountManagerCallback:
amf = accMgr.getAuthToken(account, authTokenType, null, true,
new AccountManagerCallback<Bundle>() {
public void run(AccountManagerFuture<Bundle> arg0) {
Bundle result;
Intent i;
String token;
try {
result = arg0.getResult();
if (result.containsKey(AccountManager.KEY_INTENT)) {
i = (Intent)result.get(AccountManager.KEY_INTENT);
if (i.toString().contains("GrantCredentialsPermissionActivity")) {
// Will have to wait for the user to accept
// the request therefore this will have to
// run in a foreground application
cbt.startActivity(i);
} else {
cbt.startActivity(i);
}
token = (String)result.get(AccountManager.KEY_AUTHTOKEN);
} else {
token = (String)result.get(AccountManager.KEY_AUTHTOKEN);
}
} catch (OperationCanceledException e) {
e.printStackTrace();
} catch (AuthenticatorException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}, handler);
Also, these entries in LogCat might be helpful:
08-02 15:51:00.911: I/GLSUser(10134): GLS error: Unknown XXXX#gmail.com com.google
08-02 15:51:00.911: V/GoogleLoginService(10134): Returning error intent with: ComponentInfo{com.google.android.gsf.login/com.google.android.gsf.login.LoginActivity}
08-02 15:51:03.294: I/ActivityManager(324): START {cat=[XXXX#gmail.com] flg=0x10000000 cmp=com.google.android.gsf.login/.LoginActivity (has extras) u=0} from pid 11147
(Note: Actual gmail account name removed to avoid spam.)
Are you generating a signed APK? If you don't generate a signed APK (e.g., if you just hit "run app") you won't be able to take advantage of registered Google accounts on the device. So you'll have to hit "login with other" and login the roundabout way.
(Disclaimer: I didn't try to run your code, but it sounds like an issue I ran into earlier.)
Let me tell you my problem. I want to change my screen resolution.
I can change it in an application but it changes only application's
screen. I wanna set system's resolution so it won't be important which
application is running on front. My device's resolution is set as 1280
* 720 p. Can I make it 1260 * 680? If it requires to make changes in
Android source code, I can. Just tell me where to change. Waiting for
your help.
This thread on xda-developers should set you on the right track.
Searching too a valid answer to this, but I have a lead to the solution :
WARNING Experimental buggy stuff :
/*
Requires android.permission.WRITE_SETTINGS
and android.permission.WRITE_SECURE_SETTINGS, thus it requires the app to be a system app.
*/
public void changeResolution(int x, int y){
try { Class c = Class.forName("android.os.ServiceManager");
try { Method method = c.getDeclaredMethod("checkService", String.class);
try {
IWindowManager mWindowManager = IWindowManager.Stub.asInterface((IBinder) method.invoke(null,Context.WINDOW_SERVICE));
try { mWindowManager.setForcedDisplaySize(Display.DEFAULT_DISPLAY,x,y);
} catch (RemoteException e) {e.printStackTrace();}
} catch (IllegalAccessException e) {e.printStackTrace();}
catch (InvocationTargetException e) {e.printStackTrace();}
} catch (NoSuchMethodException e) {e.printStackTrace();}
} catch (ClassNotFoundException e) {e.printStackTrace();}
}
Add a reduced AIDL version of IWindowManager to your project :
/app/src/main/aidl/android/view/IWindowManager.aidl
package android.view;
interface IWindowManager
{
boolean startViewServer(int port); // Transaction #1
boolean stopViewServer(); // Transaction #2
boolean isViewServerRunning(); // Transaction #3
void setForcedDisplaySize(int displayId, int width, int height);
void clearForcedDisplaySize(int displayId);
void setForcedDisplayDensity(int displayId, int density);
void clearForcedDisplayDensity(int displayId);
}
The app will require to be in the system apps folder.
It does something for sure, but right now it also lead to severe bugs.
Rebooting seems to cancel changes.
Waiting for feedback on this.
If you are using Windows and know how to use JNI, Microsoft provides C++ Win32 function calls to do this: ChangeDisplaySettingsEx() and EnumDisplaySettings().
I want to be able to launch native and J2ME applications through my application using the content handler API (JSR 211) on a Nokia 6212.
At the moment, I am unable to do so, as it always states that there is "No Content Handler Found" and throws a javax.microedition.content.ContentHandlerException.
At the moment, I am trying to get the phone to launch its browser and go to a certain website, just to test that I can use the framework. I have tried many different Invocation objects:
//throw exceptions
new Invocation("http://www.somesite.com/index.html",
"application/internet-shortcut");
new Invocation("http://www.google.co.uk","text/html");
// a long shot, I know
new Invocation("http://www.somesite.com/text.txt","text/plain");
// massive long shot
new Invocation("http://www.google.co.uk","application/browser");
//appears to download the link and content (and definitely does in the Nokia
// emulator) and then throws an exception
new Invocation("http://www.google.co.uk");
new Invocation("http://www.somesite.com/index.html");
Below is the code that I have been using, please bear in mind the parameters often changed to generate the different Invocation objects.
/*
* Invokes an application using the Content Handler API
*/
public void doInvoke(String url, String mime, String payload){
Registry register = Registry.getRegistry(this.getClass().getName());
Invocation invoke = new Invocation(url, mime, null, false,
ContentHandler.ACTION_OPEN);
boolean mustQuit = false;
try {
mustQuit = register.invoke(invoke);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (ContentHandlerException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if(mustQuit){
this.quit();
}
}
Try this:
Registry register = Registry.getRegistry(this.getClass().getName());
You must call Registry.getRegistry for the MIDlet inheritor. Just use your MIDlet for getting the class name.