Android : When / Where To Invoke Overridden Method Of Super Class?
Apr 14, 2010
This question occured to me while programming a Android application, but it seems to be a general programming question more.
The situation is, I am extending (subclass-ing) an class from a library, and overriding a method. how do I know if I should invoke the method of super-class? and when? (in the beginning of the overridden method or in the end?)
For example, I am overriding the method "public boolean onCreateOptionsMenu(Menu menu)" from class "Activity" in Android platform. And I saw someone write "return super.onCreateOptionsMenu(menu)" in the end of the method, in an example. But how do I know it should be done this way? and it is correct or not? what's the difference if I begin my method with "super.onCreateOptionsMenu(menu)"?
View 6 Replies
Nov 1, 2010
I created a method called insertTable in a class called Table but i can't use it in my onClick method in the main class :
CODE:.......
I want to do a income.insertTable in the onClick method but eclipse say that i need to create a local variable.
View 3 Replies
View Related
Aug 23, 2010
I want to judge the call has been connected. So I want to invoke method called isAlive() in the hide abstract class Connection(com.android.internal.telephony)?
View 6 Replies
View Related
Aug 31, 2010
I am try to use reflection to invoke the "List Camera.Parameters.getSupportedFocusModes()" function with the following codes:
CODE:..............................
The log shows it does find the function, however, the result o is always null, why is that?
View 1 Replies
View Related
May 2, 2010
I've configured local service under some app i wanna know how could i invoke methods on the activity, through the service in a synchronous way for example the service invoke a method inthe activity and waiting for for result(synchronous) from it.
View 2 Replies
View Related
Mar 19, 2010
How to invoke the getView method in the baseAdapter in Android from another WebService Bean?
The adapter in my code as follows, I extends the base adapter code...
View 1 Replies
View Related
Mar 12, 2010
I am trying to get the value of a EditText in a dialog box. A the "*"'ed line in the following code, the safeNameEditText is null; i am assuming because the 'findVeiwById' is searching on the context of the 'AlertDialog.OnClickListener';
How can I get/change the context of that 'findViewById' call?
CODE:.................
View 2 Replies
View Related
Jun 20, 2010
The brilliant minds over at xda have cooked up this 3 step root method...all of the credit goes to them, I'm just posting it.
[Program] Simple Root .1 - 3 Click Root w/ nand unlock!! - xda-developers. Here is the link for the OTA root version
http://forum.xda-developers.com/showthread.php?t=720565
View 49 Replies
View Related
Aug 28, 2009
You need a reference to the class that contains the method you want to call. To access the method homepage() inside the eSkyGuide from the class Weather, you need an instance of the eSkyGuide class inside the instance of the Weather class.
View 4 Replies
View Related
Apr 19, 2009
Can i call method of Listactivity from Activity class? I have creates Intent object of myListActivity class and called startIntent() from myActivity class.
View 3 Replies
View Related
Oct 5, 2010
I am a beginner in Android Developing. Can any1 please guide me how to call a Method of a class kept under other package. Like class A in Package 1 calls a method in Class B of Package 2 which returns An array or object. Do i have to create an Intent for that? actually i have to gather all information in 1 class from different classes kept under different packages.
View 2 Replies
View Related
Sep 18, 2010
I am writing a basic game engine and have an abstract class that represents any object that can be drawn in the 3D world, however inside this class is an abstract method Render() which I would like called automatically by the engine on each draw phase.
How could I implement this so that every class extending from my abstract class will automatically have Render() called? I am using java, android sdk 2.2, and opengl es
View 4 Replies
View Related
Nov 3, 2010
Is there any class or method for getting cdma signal strength I got for gsm but not for cdma in android??
View 1 Replies
View Related
Nov 19, 2010
I want to call a bitmap from a method in my main class and am unsure how to do it - I have a method: Code...
So basically, how can I place the bitmap in my detectFaces method in my main class and pass it as a bitmap on my imageview in my false class?
View 2 Replies
View Related
Jul 2, 2010
I am trying to call my service class's stopService() method from my activity. But I don't know how to access stopservice method from my activity class. I have the below code but its not working. This is HomeScreen class:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
enablecheck = (CheckBox)findViewById(R.id.enablecheck);
enablecheck.setOnCheckedChangeListener(new OnCheckedChangeListener(){
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(enablecheck.isChecked()){
startService(new Intent(HomeScreen.this, AutoService.class));
} else {
stopService(new Intent(HomeScreen.this, AutoService.class));
} } });
}
This is Service Class:
public class AutoService extends Service {
private static final String TAG = "AutoService";
private Timer timer;
private TimerTask task;
@Override
public IBinder onBind(Intent intent) {
return null;
} @Override
public void onCreate() {
Toast.makeText(this, "Auto Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");
int delay = 5000; // delay for 5 sec.
int period = 5000; // repeat every sec.
timer = new Timer();
timer.scheduleAtFixedRate(task = new TimerTask(){
public void run() {
System.out.println("done");
} }, delay, period);
}
@Override
public boolean stopService(Intent name) {
// TODO Auto-generated method stub
timer.cancel();
task.cancel();
return super.stopService(name);
} }
View 3 Replies
View Related
Oct 18, 2010
I've been trying to call a non-static method, located in my main application Class, from the Preferences Class. Because the method I call is not static, I instantiate the main class and then try to call the specific method I want but it's force closing.
Preferences.class (from where I call the method):
Preference sorted = (Preference) findPreference("sortPref");
sorted.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
public boolean onPreferenceChange(Preference preference, Object newValue) {
Object d = new Dmarks();
((Dmarks) d).queryBookmarks();
return true;
}});
the Dmarks.class method I call:
public void queryBookmarks() {
Toast.makeText(context, Toast.LENGTH_LONG).show();
//context is not null and the Toast is working if I call it from Dmarks.class }
The Logcat:
E/AndroidRuntime(11718): FATAL EXCEPTION: main
E/AndroidRuntime(11718): java.lang.NullPointerException
E/AndroidRuntime(11718):
at android.content.ContextWrapper.getContentReso
lver(ContextWrapper.java:90)
E/AndroidRuntime(11718):
at android.app.Activity.managedQuery(Activity.ja
va:1520)
E/AndroidRuntime(11718):
at com.droidil.droidmarks.Dmarks.queryBookmarks(
Dmarks.java:101)
E/AndroidRuntime(11718):
at com.droidil.droidmarks.Preferences$2.onPrefer
enceChange(Preferences.java:47)
E/AndroidRuntime(11718):
at android.preference.Preference.callChangeListe
ner(Preference.java:756)
E/AndroidRuntime(11718):
at android.preference.ListPreference.onDialogClo
sed(ListPreference.java:219)
E/AndroidRuntime(11718):
at android.preference.DialogPreference.onDismiss
(DialogPreference.java:384)
E/AndroidRuntime(11718):
at android.app.Dialog$ListenersHandler.handleMes
sage(Dialog.java:1047)
E/AndroidRuntime(11718):
at android.os.Handler.dispatchMessage(Handler.ja
va:99)
E/AndroidRuntime(11718):
at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(11718):
at android.app.ActivityThread.main(ActivityThrea
d.java:4627)
E/AndroidRuntime(11718):
at java.lang.reflect.Method.invokeNative(Native
Method)
E/AndroidRuntime(11718):
at java.lang.reflect.Method.invoke(Method.java:5
21)
E/AndroidRuntime(11718):
at com.android.internal.os.ZygoteInit$MethodAndA
rgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime(11718):
at com.android.internal.os.ZygoteInit.main(Zygot
eInit.java:626)
E/AndroidRuntime(11718):
at dalvik.system.NativeStart.main(Native Method)
D/dalvikvm(11718): GC_FOR_MALLOC freed 4248 objects / 282248 bytes in 40ms
W/ActivityManager( 244): Force finishing activity com.droidil.droidmarks/.Preferences
View 5 Replies
View Related
Sep 12, 2010
I have code which has one activity which passes information to a second activity.
I can use this information to pass to a third activity with additional information from the result of the second activity.
I want to use gestures as a method of going back to a previous activity, but if I go back from the third to the second activity I need the information initially passed from the first to the second activity to still be present.
i.e.
First Acticity
what is Y?
answer y = 5
Second activity
User said Y = 5
what is X?
Third Activity
User said Y = 5
X = 6
Go back to Second activity but maintain the input of
User said Y = 5.
To do this I have used a bundle to pass the information between activities, but I can only access the info in the bundle from within a method within the class started by the intent.
The gesture controls are within another class, so I cannot access the bundle information from within this class as the getIntent command produces a not defined error.
What I need to do is to be able to pass the information from the bundle from the first activity to the gesture class so that I can pass it back when I go back using the gestures.
View 1 Replies
View Related
Sep 22, 2010
Since API 7, PhoneStateListener has a function: void onSignalStrengthsChanged( SignalStrength signalStrength )
Question: how can I override this via reflection so that I can stay backwards compatible with earlier APIs that don't have the SignalStrength class ? If I make the argument an Object, the signature changes of course.
View 3 Replies
View Related
Aug 8, 2010
I am using the following method in a new application I'm developing. There is a main activity, which instantiates different classes that extends RelativeLayout and I'm using setContentView to switch between the different modules of the application. I wonder if this is a good approach or necessarily I have to use different activities to the several screens the app haves.
View 1 Replies
View Related
May 19, 2010
The problem seems to be that the Service class does not inherit the > findViewById() method.
View 3 Replies
View Related
Apr 30, 2010
I am trying to execute a {public void} method in Service, from scheduled TimerTask which is periodically executing.This TimerTask periodically checks a condition. If it's true, it calls method via {className}.{methodName};However, as Java requires, the method needs to be {pubic static} method, if I want to use {className} with {.dot}.The problem is this method is for notification using Toast(Android pop-up notification) and Status Bar.But for this to work, the method must not have {static} modifier and resides in Service class.So, basically, I want background Service to evaluate condition from scheduled TimerTask, and execute a method in Service class.Can anyone help me what's the right way to use Service, invoking a method when certain condition is satisfied while looping evaluation?
View 1 Replies
View Related
Apr 18, 2012
I try to make android java app that uses webkit browser component but in slight different way. My primary goal is to modify the webkit WebViewCore java class method so my android application uses my own WebView which derived from modified WebViewCore and acts as I wish. The problel is that WebViewCore and entire bunch of related classes is not part of public SDK.
So far I tried:
- replaced android.jar from SDK in my project with "full" version (framework.jar)
- copied entire webkit java classes from Android OS to my project and modified the method as I need.
- included in lib/armeabi the libwebcore.so and libchrome_net.so (these I grabbed from rooted phone which I gonna to use for experiments)
- compiled and created apk file with libs included (in the code java layer calls my own libs using System.loadLibrary(..))
- application crashes on launch on device with:
Code:
04-18 10:39:23.451: D/dalvikvm(8214): Trying to load lib /data/data/com.tester.webtest/lib/libwebcore2.so 0x2bb4a1c8
04-18 10:39:23.511: D/dalvikvm(8214): Added shared lib /data/data/com.tester.webtest/lib/libwebcore2.so 0x2bb4a1c8
04-18 10:39:23.521: D/dalvikvm(8214): Trying to load lib /data/data/com.tester.webtest/lib/libchromium_net2.so 0x2bb4a1c8
04-18 10:39:23.531: D/dalvikvm(8214): Added shared lib /data/data/com.tester.webtest/lib/libchromium_net2.so 0x2bb4a1c8
04-18 10:39:23.541: D/dalvikvm(8214): No JNI_OnLoad found in /data/data/com.tester.webtest/lib/libchromium_net2.so 0x2bb4a1c8,
[code]....
What should I do for making my own independent version of webkit, so I can install it with my application on specific phone without breaking other apps (browsers) behaviour?
View 3 Replies
View Related
Aug 31, 2010
I m doing some task with following code,
I want to access inner class variable from outer class method.
class Outer extends Activity
{private Handler mHandler = new Handler();
StopTheThread()
{mHandler.removeCallbacks(mUpdateTimeTask);//
This is the what I want to do:
} class Inner
{ final Runnable mUpdateTask = new = new Runnable() {
public void run() {
//Some Code Goes Here
} };
InnerClassMethod()
{ mHandler.removeCallbacks(mUpdateTimeTask);//
This statement working fine here. Here mUpdateTask is inner class variable which is not accessible from outer class.
View 2 Replies
View Related
Mar 30, 2010
i want to display a msg to the user (msg box or Toast) when exception happend in a static SQLite Database class that i use. the problem is that i cant call a non static method in a static class , how can i handle this. this is the class
private static SQLiteDatabase getDatabase(Context aContext) {
and i want to add something like this in the class when exception happen but context generates the problem of reference to non static in static class.
Context context = getApplicationContext();
CharSequence text = "Hello toast!";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
View 1 Replies
View Related
Nov 2, 2009
We are developing an election monitoring application that relies on the SMS network to submit reports from independent election observers in the field. The application poses questions to the user, who answers them sequentially, and an SMS is sent each time a question is answered. We currently have around 120 questions (and therefore 120 SMS messages) that need to be sent in a fairly short period of time. However, the limit in the Android source is 100 SMS messages per hour (3600000 milliseconds). How can this limit be overridden, either on a per-application basis or in the Android source?
View 3 Replies
View Related
Feb 11, 2009
I'm having some problems porting a Java application to work in Android platform. I detected an incompatibility problem between java sun and Adroid sdk in java.lang.Class. I oberved that: public Field[] getFields() Returns an array containing Field objects describing all fields which are defined. That's array is sorted as attributes are declared in the main Class in sun jdk. For example, next Class is defined as: public class Example { public boolean stop; public int atr1; public String name; ....
}
View 5 Replies
View Related
Jan 5, 2010
I know that Android provides some useful methods to be overridden in order to define a menu:
CODE:..............................
I would like to have this menu shared by each Activity and ListActivity of my Android application. This is for having a standard menu in each (List) Activity that lets the user jump to every part of the application within a click.
Right now, the easiest way to achieve this is to copy-and-paste both methods in every (List) Activity of the application. I don't like this redundancy of code written.
Is sub-classing a reasonable choice? I've already seen that sub-classing one of my ListActivity does not work very well (threads that retrieve objects from a database are giving problems). Are there other ways to share a menu though Activities?
View 2 Replies
View Related
May 7, 2010
Under Settings -> Date and Time, whenever I set a Date to a future or past number, it gets overridden by the Network/WiFi. I've made sure that I've unchecked the Automatic option. Anyone have any ideas why this is?
When I turn off my Network(3G) and WiFi, I'm able to set the Date to whatever I want without it getting reset like 2 seconds later.
View 4 Replies
View Related
Jun 17, 2010
My contact photo's/icon's keep getting overridden by their linked Facebook photo.. i set the particular contact to a photo and in a couple of seconds their facebook photo is back as their icon.. any way to keep this from happening.
View 3 Replies
View Related
Apr 28, 2013
When I play music on my RAZR (JB 4.1.2) via Poweramp, its notification always overrides Power Toggles' one. I mean Poweramp stays on top and then comes PT being the second. The latter has specially designed "notification priority" feature which is set to 5/5, and it works perfectly until I start Poweramp. I have never faced such problem before as I used both applications and they did not interfere with each other.
So is there a way to raise PT's notification priority or drop the Poweramp's one instead? May be some "notification priority manager" or anything...
Tried Notification Toggles app which is similar to PT, but thing was the same, so it's Poweramp issue.
View 2 Replies
View Related
