Android :: Reflection For A Field Going Wrong

Jun 1, 2010

I have been trying to use reflection for a specifiec Field in the android.os.build class, the MANUFACTURER field...

I have tried by using this code :.............

I am gettign the following errors :

code:..........

And when debugging I noticed that InvocationtargetException is continuesly thrown, so I am guessing I haven't been implementing the whole Reflection principle correctly...

Any idea where things are going wrong or otherwise on how to implement Refelction for a single Field correctly ?

Android :: Reflection for a Field going wrong


Android :: Supporting 1.5 Features From 2.1 And No Reflection?

Jul 30, 2010

I currently have an app on the market that supports Android 1.5 (SDK level 3) and up. It also takes advantage of several features that are only present in Android 2.0 (SDK level 5) and up. I do this using Reflection.

I read a post on the Android Developer Blog that talks about how to support these new features while using no Reflection, which would be amazing. http://android-developers.blogspot.com/2010/07/how-to-have-your-cupcake-and-eat-it-too.html <uses-sdk android:minSdkVersion="3" android:targetSdkVersion="5" />

I have tested this out and while it works there is one huge downfall. Currently if I try to add a SDK level 5 class, but I don't know that it's a SDK level 5 class, there is no worries. Eclipse isnt going to find the class and I'm not going to be able to add it.

Using Google's recommended method does allow me to add the classes and gives me no notification that this code is targeted just to SDK level 5 users. This opens up too big of a possibility of adding in code that would break some users without knowing.

Does anyone know of any plugins, options, etc that would warn me at the places I have targeted SDK level 5 to keep this from happening?

View 1 Replies View Related

Android :: Reflection Fails On Large Class / What To Do?

Jun 15, 2009

Does dalvik have any limitation it puts on classfiles, mainly size related? In groovy we have a huge class thats need to be able to be reflected upon, but it silently fails. IE theres no error during build(dex) or load time but calls to the reflective methods throws a no such method exception. This file is above 13000 lines of code and contains a vast number of methods so size limitations seems probable, or are there any other ways reflection can fail for a normal java class? Oh, and cutting the file down in size made it work but is not optimal since it contains all of groovy's utility methods.

View 3 Replies View Related

Android :: Java Reflection - Get All Instance Variable Names Of A Class

Nov 5, 2010

I'm writing an android app that requires binding a JSON object into a domain entity with the keys from the JSON as instance variables. Since there are several domain entities, each with different instance variables that the JSON needs to bind to in the app, i'd like to write a method such as ths following: Loop through all the instance variables from the domain if a key exists in the JSON with the name of the instance variable, take the value for this key from the JSON and set the Domain's instance variable with this key name equal to this value. The reason i'm interested in the doing the binding from the class to the JSON is because if the JSON changes for some reason, I don't want it to break the app when the instance variable doesn't exist in the app's domain for a specific JSON key. Code...

View 2 Replies View Related

Android :: Java Reflection To Call Higher API Level Function / Abstract Class

Jul 6, 2010

My point is to be able to call a 2.1 API if it exists, while the application should be able to run in 1.5
Specifically, I am making a GPS application which would like to call android.location.LocationManager.addNmeaListener if available. My problem is that this call takes as parameter an abstract class (GpsStatus.NmeaListener) which I cannot pass directly to Class.GetMethod (or my application won't work in 1.5). What I am currently trying is a) to create a wrapper class for GpsStatus.NmeaListener:......................

View 2 Replies View Related

General :: Bluetooth Stack AIDL Reflection Methods?

Feb 17, 2013

I work at a small company that fields autonomous android devices which programmatically connect to bluetooth telemetry devices. These devices require pins, so we need to automatically create a pairing in order to connect to the bluetooth devices. We DO have root access.

Since the new Bluetooth Stack in Android 4.2, I have been unable to use this common AIDL bluetooth reflection method in our private utility app:

Code:
public IBluetooth getIBluetooth() {
IBluetooth ibt = null;
try {
Class c2 = Class.forName("android.os.ServiceManager");
Method m2 = c2.getDeclaredMethod("getService",String.class);
IBinder b = (IBinder) m2.invoke(null, "bluetooth");

[code]...

The issue about this strategy no longer working is documented here. I previously used the setPin method as well as the createBond method from this Interface, and now I cannot.

Is there anyway to manually create a bluetooth pair profile under Android 4.2? Is there a database file where the profiles are stored that we can use root and sqlite3 to access?

View 1 Replies View Related

General :: How To Get Instance Of Class That Implements Interface Using Reflection

May 7, 2014

I've been going over the android sdk for the past year to find out if there is a way to change the network type(2g/3g/4g), in phones with root access.However I couldn't find any way to do this.Asking around,someone told me that I could do this using reflection,by calling a method on a phone instance.Looking through the source code,I did find a setPrefferedNetworkType(); method in the Phone Interface,inside the internal telephony package.Is there anyway I can use this to solve my problem.I can't seem to find a way to get an instance of a class that implements the interface.Or is there any other way to do it entirely?

View 3 Replies View Related

Android :: How To Add New Field To Contact?

Apr 28, 2010

I want to add a Custom field to the Contacts Contract content provider. I'm trying to build a Voip application and would like to add a SIP address(name@domain) field to it. What MIME type will I need to associate with it? Also I want to add a group address field which will have a list of group addresses in it (name@domain, name@domain Which MIME type will I have to associate with this type of field. I also want to add custom fields to the Call History like a session ID and SIP address(name@domain) field. How can I customize the call history?

View 1 Replies View Related

Android :: Sdk - Field Of Useage ?

Jul 29, 2010

Before I start to develop an application I really want to know that we can only use android Sdk on Android phones or can we use the android Sdk to develop other things like iPad, iPhone also etc?

View 1 Replies View Related

Android :: Cursor - Get The Field Value

May 24, 2009

I have problems with Cursor in my Android application.

I have a SQLiteDatabase that return me Cursor when I try to fetch the values with :

code:.......

But I don't know how to obtain the value of the field in the Cursor.

If I do that :

code:........

I obtain the name of the columns (_id, title, body) but not the value.

View 2 Replies View Related

Android :: Id Cannot Be Resolved Or Not Field If Don't Import R

Jul 22, 2010

If I don't import R, I get "id cannot be resolved or is not a field" (R.id.mainanim); And if I import R, the id error is gone, but I get "main and mainanim cannot be resolved or is not a field". They're my xml files! Also here is ALL my code... maybe there is an error I didn't see?

JAVA:.................

View 2 Replies View Related

Android :: Transparent Text Field

Apr 25, 2010

Is there any way to create a transparent text field?

View 4 Replies View Related

Android :: Got EditText Field From XML / App Crashes

Mar 23, 2010

I have an activity in my app, when i call the line
EditText username = (EditText)findViewById(R.id.usernameText); the app crashes, why is this?

View 3 Replies View Related

Android :: Want To Display Listview With Key Field?

Aug 16, 2010

I want to display a listview when clicked be able to get the items key value. How would I go about that.

View 1 Replies View Related

Android :: Electro Magnetic Field App

Mar 24, 2010

I have noticed a rash of EMF "detectors" currently available for the iPhone 3GS only.

Does the Milestone/Droid series phones have the capability to detect EMF and if so does anyone know of a current app or one in development that will do this? I've searched the app store without finding a clear result.

View 5 Replies View Related

Android :: Way To Add New Field In Contacts On Droid API 2.1?

Aug 4, 2010

I am new to android , I hope so u guys will help me to obtain my requirement. I am using an Android API Level 2.1 I need to create a new field such as user@domain not as e-mail format for every contacts. So i need to create a new MIME type now i got struck how to create this MIME type.

View 1 Replies View Related

Android :: EditText Field Not Update?

Sep 1, 2010

I have an EditText field and a button. My aim is to let user enter text info to the EditText or click the button to launch a dialog to select some checkbox and radio button which it will perform some computation and return a value to display at the EditText field.

I can't seems to get the value to display at the EditText field after the dialog dismiss. I did try a toast to display the value and it is ok. I *think* the view was not refresh to display the text in the EditText field.

View 6 Replies View Related

Android :: Use Long Field In Sqlite

May 6, 2009

I want to store long value in database ( current time millis), how to store it.

View 3 Replies View Related

Android :: DDMS - ? - In Process Name Field

Mar 12, 2010

When i am running DDMS tool to profile the application, In left pane of the DDMS tool we are able to see all the emulators that are attached to DDMS. When i expand one of the emulator some times i am getting "?" in process names.

View 9 Replies View Related

Android :: Using Text Field With AdapterView

Jun 2, 2010

Is it possible to use AdapterView with text fields in android?

My query returns a set of values and for each I want to place that within a textfield, so that the user may edit the value.

Also, I want to click a button to create a new empty field, so that I may insert a new entry.

If you know of good example, then please let me know!

I would prefer to use XML to define ui and I found this informations:

"In this case we create a new id called text1. The + after the @ in the id string indicates that the id should be automatically created as a resource if it does not already exist, so we are defining text1 on the fly and then using it." Source http://developer.android.com/resources/tutorials/notepad/notepad-ex1.html

Will this + allow me to autocreate as many fields as needed? Is there a way I can generically specify the layout in XML and then create fields adhoc based on db response?

View 1 Replies View Related

Android :: Impossible To Write Something On A Field

Oct 8, 2010

I have build a sort of split view for one of my android applications. I have made an activity which is a container of a listview and a framelayout. I use the listview for a menu and in my framelayout, I load views of different activities. I have read the source code of the TabHost for building this system.

Activities that I load in my framelayout could contain a webview.

The system work pretty well but I have a big issue. When I click on a field in a webview, the soft keyboard doesn't appear and typing on the physical keyboard has no affect.

I have made many many researches and I found nothing.

View 2 Replies View Related

Android :: HasFocus Field In HierarchyViewer

Apr 5, 2009

When I look at all the views in HierarchyViewer, why there are multiple views's 'hasFocus' is true? I am under the assumption that only 1 view can have focus at a time. If so, why there are multiple view's hasFocus be true?

View 2 Replies View Related

Android :: Persistent Field In Service

Aug 6, 2009

I need to retain a complex object in my service, so I can reliably come back to it (it holds updates). Initially I coded it just as a class filed in my Service implementation but I'm observing that the updates object is periodically reset to null which tells me that server class itself is recreated. Can someone recommend lightweight reliable strategy to save and recreate such updates object (I can make it serializable)

View 2 Replies View Related

Android : Calculate An Appropriate Field Width?

Sep 18, 2010

In my app I am displaying a table where the individual cells are editable text fields (i.e. EditText objects). I am currently struggling calculating appropriate widths for these.

If I set the width to be as many "Ems" as the displayed text has characters, my fields are much to wide by about a factor of 2 and the table looks ugly and wastes lots of precious screen space. Setting the width in "Ems" is essentially like assuming the worst case, i.e. the width of a string under the assumption that it contains only the broadest characters in a font, usually 'M' (hence the name of the method), 'm', 'W', or '_'). But on average strings contain narrower characters and so most of these fields are half empty and much too wide for their actual content. I am thus desperately seeking a way to calculate a better fitting width, not that worst case width.

The "normal" way to do this in Java (in AWT or Swing at least) is to asks a widget's current Font (actually a Font's FontMetrics), to calculate and return the width that will be necessary to display a given string in pixels. But how does one obtain a TextView's Font? I haven't found any method to obtain a (Text)View's font and/or calculate a more appropriate width given the actual content of a cell's text string. How does one do that in Android?

View 1 Replies View Related

Android :: Virtual Keyboard - Text Field

Apr 5, 2010

I am having problem in Virtual Keyboard. I am having text field. if user click the text field then virtual keyboard need to appear. how to do this.

View 5 Replies View Related

Android :: Stack Traces From Users In Field?

Aug 12, 2009

Does anyone know if there is standard way to get error reports from android applications running on other people's android devices? E.g. I release an android app and it goes out there. I'd love for any error to trigger an apology screen that invited the user to input a description of what happened, and then have that data along with program state and stack trace sent back to me.

View 4 Replies View Related

Android :: Getting Magnetic Field Results As Degrees

Dec 12, 2009

I'm working on an application that will randomly point an arrow in a direction, and have that arrow maintain it's direction if the device is moved. All I want to do it get the magnetic field readings as degrees and I can do it from there. The problem I'm having is getting the magnetic field readings. I can't find any tutorials on it and the API demo on google's dev site uses deprecated code (figures, google's sample code is never n00b friendly).

At this point I've got this together but I don't know what I'm missing, all the examples I can find are using SensorListener which has onSensorChanged(int sensor, float[] values) but SensorEventListener does not support "float[] values"

View 7 Replies View Related

Android :: Composition Field For Text Messages?

Nov 22, 2010

Has anyone else struggled with the size of the composition field for text messages?Sometimes I get long winded and then I have a hard time proof reading all of my words because the bubble is so small.I try to scroll up and down but it doesn't always work.

View 1 Replies View Related

Android :: How To Make Edittext Field For Decimals?

Nov 24, 2010

How to make dynamically edittext field for accepting only double and float values.

View 1 Replies View Related

Android :: Setting UI Preference Summary Field To Value

Sep 30, 2010

New to Android, I have some code when the user changes a preference I update the Summary field in the UI preference to be the value they entered. However, when the preference activity is created I'd like to set the Summary fields to be the values in the corresponding preferences.
Please advise. Thanks.

public class MyPreferenceActivity extends PreferenceActivity implements OnSharedPreferenceChangeListener { protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preference);
SharedPreferences sp = getPreferenceScreen().getSharedPreferences();
sp.registerOnSharedPreferenceChangeListener(this);
} public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { Preference pref = findPreference(key); if (pref instanceof EditTextPreference) { EditTextPreference etp = (EditTextPreference) pref; pref.setSummary(etp.getText());
} } }

View 1 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved