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• Is this a good implementation of DefaultHttpClient and ThreadSafeClientConnManager in Android?

  - by johnrock

  In my Android app I am sharing one httpclient for all activities/threads. All requests are made by callling getHttpClient().execute(httpget) or getHttpClient().execute(httppost). Is this implementation complete/correct and safe for multiple threads? Is there anything else missing i.e. Do I have to worry about releasing connections at all? …

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• HttpProtocolParams.setUseExpectContinue(params, false) - when to set true?

  - by johnrock

  I am using org.apache.http.impl.client.DefaultHttpClient to retrieve xml from a webservice and am trying to determine whether to set HttpProtocolParams.setUseExpectContinue(params, true) or HttpProtocolParams.setUseExpectContinue(params, false). I am not clear on how to determine this. Can anyone offer a best practices guideline on when this…

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• How to refresh an Android RelativeLayout when orientation changes without restarting the Activity?

  - by johnrock

  I have an Android Activity with a RelativeLayout and I have implemented the following method to prevent the activity from being recreated on change of Orientation: @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); } I am obviously not doing anything in this method,…

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• What is the correct way to synchronize a shared, static object in Java?

  - by johnrock

  This is a question concerning what is the proper way to synchronize a shared object in java. One caveat is that the object that I want to share must be accessed from static methods. My question is, If I synchronize on a static field, does that lock the class the field belongs to similar to the way a synchronized static method would? Or, will…

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• Android listview produces black highlighting over text when scrolling. How to stop this?

  - by johnrock

  I have a listview within which each item contains black text on a white background. When testing on a Nexus One, when scrolling down to read through the text, a black highlight appears over the text and makes it unreadable. I am trying to figure out what is this setting so I can turn it off. I do not want anything to get highlighted when…

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• How to get principal name from HTTPRequest in CXF JAX-RS webservice method called from android app.

  - by johnrock

  How can I get the principal name, session and ideally check if the principal is authenticated with the Spring Security context inside a CXF JAX-RS webservice method receiving a call from an Android client? This is the code I am currently working with. I have commented where and what I am trying to get. Android code to call webservice: …

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• Trouble parsing quotes with SAX parser

  - by johnrock

  When using a SAX parser, parsing fails when there is a " in the node content. How can I resolve this? Do I need to convert all " characters?

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• How to kill an Android activity when leaving it so that it cannot be accessed from the back button?

  - by johnrock

  In an given Android activity, I would like to start a new activity for the user at some point. Once they leave the first activity and arrive at the second, the first activity is stale and I want to remove it completely so it can not be accessed again from the back button. How is the best way to accomplish this? How do I kill or destroy…

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• Trouble parsing quotes with SAX parser (javax.xml.parsers.SAXParser) on Android API 1.5

  - by johnrock

  When using a SAX parser, parsing fails when there is a " in the node content. How can I resolve this? Do I need to convert all " characters? In other words, anytime I have a quote in a node: <node>characters in node containing "quotes"</node> That node gets butchered into multiple character arrays when the Handler is…

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• Trouble parsing quotes with SAX parser (javax.xml.parsers.SAXParser)

  - by johnrock

  When using a SAX parser, parsing fails when there is a " in the node content. How can I resolve this? Do I need to convert all " characters? In other words, anytime I have a quote in a node: <node>characters in node containing "quotes"</node> That node gets butchered into multiple character arrays when the Handler is…

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• Mercurial/Intellij9 hg4idea Error: cannot update with applied MQ patches, please use rebase

  - by johnrock

  I am getting the following error when trying to update my project from Intellij 9 using hg4idea: Error: cannot update with applied MQ patches, please use rebase What does this mean? I have not created or applied any patches as far as I know. I can pull changes from my remote repository but cannot update the project from within…

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• Using java.util.regex in Android apps - are there issues with this?

  - by johnrock

  In an Android app I have a utility class that I use to parse strings for 2 regEx's. I compile the 2 patterns in a static initializer so they only get compiled once, then activities can use the parsing methods statically. This works fine except that the first time the class is accessed and loaded, and the static initializer…

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• How to make a request from an android app that can enter a Spring Security secured webservice method

  - by johnrock

  I have a Spring Security (form based authentication) web app running CXF JAX-RS webservices and I am trying to connect to this webservice from an Android app that can be authenticated on a per user basis. Currently, when I add an @Secured annotation to my webservice method all requests to this method are denied. I have…

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• Android Apps: What is the recommended targetSdk for broadest appeal?

  - by johnrock

  I have an Android app that only needs internet access and would like to target API level 3 (1.5) to reach the broadest handset base. However, it appears that targeting API level 3 implicitly requires two additional permissions that are visible to users: modify sd card, and read phone state. See:…

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• How to limit the number of the same Activity on the stack for an Android application

  - by johnrock

  Is this possible in an Android app? I want to make it so that no matter how many times a user starts activityA, when they hit the back button they will never get more than one occurence of activityA. What I am finding in my current code is that I have only two options: 1. I can call finish() in…

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• In an Android TextView, is it possible to insert paragraphs?

  - by johnrock

  Below is an example of the type of problem that I have. I have data in a pojo that I need to display in a textview... the data has pseudo code that denotes each paragraph with [p] I would like to somehow parse the [p]'s into paragraphs when they are displayed in the textview. Can this be done?…

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• How to stop an Android Service ONLY when there are no other activities in my app running?

  - by johnrock

  Is there a way I can test if there are any other activities in my app still alive? I am looking to stop a service in an onDestroy method, but only want to do this if there are no other activities from my app still alive on the stack. I have the call stop the service in the main activity's…

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• How to code Android for the visually impaired?

  - by johnrock

  Does Android support visually impaired users in the same way as HTML alt tags are used to provide input for screen readers on the web? If so, what is the best practice to code Buttons and ImageViews etc so they can be read by a screen reader?

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• In Android ListActivity, how do you apply layout formatting to footers?

  - by johnrock

  In an Android ListActivity, I am adding a button as a footer in a ListView. How can I apply layout formatting to this button like centering it and/or width=fill_parent? I have tried a few things such as using setLayoutParams(), but have not gotten it to work - the footer always disappears…

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• Possible to programmatically open a Spinner in Android app?

  - by johnrock

  If you have a handle to a Spinner object in an Android activity, can you programmatically pop open the spinner options - thereby forcing the user to choose an option even though they did not click on the spinner themselves?

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• How to make an adroid app return to the last open activity when relaunched?

  - by johnrock

  Is it possible to configure an android app so that if a user has opened your app, launched numerous activities, then returns to the home screen and relaunches your app again, instead of going to the main activity they will instead be taken to the activity highest on the stack (the most…

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• Sharing DefaultHttpClient in Android. To synchronize or not to synchronize?

  - by johnrock

  In an Android app, I am using one static instance of org.apache.http.impl.client.DefaultHttpClient and sharing that instance in all activities and services of the app, so that this client may be used to log in once to a remote server and all subsequent user requests to that remote…

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