stackoverflow posted:

I have a Preference activity which uses a List Preferences as defined by my XML file. How would I set the summary of the list activity to the value that is selected?

Thank you!

stackoverflow answer posted:

The simplest way to do this is just to have Android do it for you. Assuming you want the summary to match the selected value, you can simply set the summary of the ListPreference to "%s".

Android will replace %s with the current string value of the preference, as displayed by the ListPreference's picker.

I spent far too much time mucking about with SharedPreferences listeners before I discovered this. As a bonus, the list's summary will be set correctly when you enter the activity.

Jabor posted:

The easy way to get data into a ListView:

- Create a custom subclass of BaseAdapter.
- Implement getCount() to return the total number of items in your data set.
- Implement getView(int position, View convertView, ViewGroup parent) to inflate a new view from whatever layout you want to use, populate it with the data from the appropriate position in your data set, and return it.
- Give the ListView your adapter.

Tunga posted:

This was helpful, thanks. But now I'm confused about how separators work.

I basically have three lists that I was to display one after another with a small "header" at the top of each one.

Would be easier to just add three ListViews to my layout?

Uncomfortable Gaze posted:

Hopefully someone will take the new RecyclerView stuff and writes a nice wrapper library for it.

quote:

As we’ve continued to add more APIs across the wide range of Google services, it can be hard to maintain a lean app, particularly if you're only using a portion of the available APIs. Now with Google Play services 6.5, you’ll be able to depend only on a minimal common library and the exact APIs your app needs. This makes it very lightweight to get started with Google Play services.

The Gay Bean posted:

I have a large-sh C++ project I'm trying to get working on Android. The GUI is isolated from the meat of the program, and I've confirmed library support on Android.

The problem is that I'm having a hell of a time with Eclipse. I'm not really asking for much: just editor support for C++ code. The Project Tango SDK and all of the examples ( https://developers.google.com/project-tango/downloads ) are all geared toward Eclipse, which is my main reason for not jumping ship to Android Studio. Yesterday I spent a ton of time getting everything checked into Git, deleting the repo, checking it out, and making sure it would build on different computers, but today, wit absolutely no change on my part, I opened up eclipse and am greeted with jagged red lines and failed builds. There's also a year-old bug in which changing the NDK toolchain doesn't update Eclipse, and there's fuckall you can do about it (the solution in that link does not work.) When it comes time to import my code into the project, which makes heavy use of std::threads and mutexes, I'm stuck either changing everything over to pthreads or boost or abandoning editor support anyway.

My question is: what is the accepted way of dealing with large NDK projects and keeping editor support? Android Studio + Gradle? Eclipse + a huge headache? Eclipse + ndk-build + an external tool? Every time I search for any solution I always come across a 1000 page tutorial from 2009 that has a ton of outdated information. At the moment, Android Studio seems like the way to go, but I want to make sure that the time investment of switching / learning Gradle is worth it before I begin.

The Gay Bean posted:

My question is: what is the accepted way of dealing with large NDK projects and keeping editor support? Android Studio + Gradle? Eclipse + a huge headache? Eclipse + ndk-build + an external tool? Every time I search for any solution I always come across a 1000 page tutorial from 2009 that has a ton of outdated information. At the moment, Android Studio seems like the way to go, but I want to make sure that the time investment of switching / learning Gradle is worth it before I begin.

tRIDAV posted:

If anyone has an idea of why this is an issue being placed in onCreate I'd love to read up more on this.

edit: Manage to find a work around. Instead of setting the Paint color directly, I store the color value and set it during the onDraw.

Sereri posted:

What are people here using for crash reporting/analysis?

Awful has been using Bugsense for a couple of years now, but I've never been really happy with it and would love some input.

Android Developer Tools posted:

Caution: The ADT plugin for Eclipse is no longer in active development. If you're currently using it, you should migrate to Android Studio as soon as possible. For more details about Android Studio, see the Android Studio guide.

ButtaKnife posted:

A bit late with this, but Crashlytics is fantastic. I'm really liking it so far. What solution did you end up with?

MrZig posted:

Are there any good resources for good practices for performance coding? Stuff like how calling a public variable from another class is faster than calling a get method, how defining variables before a for() loop searching an array is faster etc. That sort of stuff. I know Google has one on their Dev website, but I was wondering if there were more?

speng31b posted:

Doctor w-rw-rw- posted:

Yesssss...let the hate flow through you. I went through nearly the same thing a couple of years ago, though possibly worse since Android 7-9 was a total shitshow and video playback was the wild west on any Android version less than 4.0, and still woefully inconsistent and terrible on higher versions.

Thanks for the article.

speng31b posted:

My favorites are crash reports from embedded html5 video trying to play in a webview.

hooah posted:

I'm near the beginning of Udacity's Android App Development course, and I figure this might be a better place for my stupid Java/Android-newbie questions than the Java thread. The course talks you through making a weather app. So, I've got the MainActivity and the fragment. At this point, I'm supposed to push the app to my phone and hit the refresh button. An expected crash happens, and I'm to look in the logcat and choose the right error from a list of four. The problem is that the error I get (NetworkOnMainThreadException) apparently isn't the right one. I'm guessing I did something unexpected, having come from C++ with not a whole lot of Java experience. What did I do wrong?

hooah posted:

There's a nested async task in the fragment that's supposed to be doing that in onOptionsItemSelected:

Java code:

        FetchWeatherTask task = new FetchWeatherTask();
        task.doInBackground();
}

Uncomfortable Gaze posted:

There's a problem, calling doInBackground() will actually do the work in the UI thread. You need to call execute(), which will call the doInBackground method in a secondary thread.

hooah posted:

Well it would've been nice if they'd loving mentioned that anywhere
Why would telling an async task to do in the background not ...do it in the background??

hooah posted:

Well it would've been nice if they'd loving mentioned that anywhere
Why would telling an async task to do in the background not ...do it in the background??

hooah posted:

I probably should have learned what a callback is before doing this, I guess. Any good references for that? The Wikipedia page wasn't terribly helpful.

I did miss the bit that said "Once created, a task is executed very simply:" though.

hooah posted:

I'm a little further on, and now being confounded by JSONObject and JSONArray. I have a JSON string that's the weather data from openweathermap.org. I'm trying to parse the thing to get the max temperature from a given day (day is an int). I read the class overview for both of these classes, and then skimmed through the methods. Here's my code attempt so far:

Java code:

public static double getMaxTemperatureForDay(String weatherJsonStr, int dayIndex)
		throws JSONException {
		JSONObject forecast = new JSONObject(weatherJsonStr);
        JSONArray days = forecast.getJSONArray("list");
        JSONObject day = days.get(dayIndex);
        JSONObject temps = day.get("temp");
        return temps.get("max");
	}

I'm using the Udacity IDE because I'm lazy, and it's giving me a few errors about incompatible types. The first is on the open paren in JSONObject day = days.get(dayIndex);. The message says that a JSONObject is required, but it found an Object. I don't understand why it's looking for a JSONObject, when the documentation says that the .get method of JSONArray takes an int.

hooah posted:

I'm a little further on, and now being confounded by JSONObject and JSONArray. I have a JSON string that's the weather data from openweathermap.org. I'm trying to parse the thing to get the max temperature from a given day (day is an int). I read the class overview for both of these classes, and then skimmed through the methods. Here's my code attempt so far:

Java code:

public static double getMaxTemperatureForDay(String weatherJsonStr, int dayIndex)
		throws JSONException {
		JSONObject forecast = new JSONObject(weatherJsonStr);
        JSONArray days = forecast.getJSONArray("list");
        JSONObject day = days.get(dayIndex);
        JSONObject temps = day.get("temp");
        return temps.get("max");
	}

I'm using the Udacity IDE because I'm lazy, and it's giving me a few errors about incompatible types. The first is on the open paren in JSONObject day = days.get(dayIndex);. The message says that a JSONObject is required, but it found an Object. I don't understand why it's looking for a JSONObject, when the documentation says that the .get method of JSONArray takes an int.

Uncomfortable Gaze posted:

The JSONObject/JSONArray get() methods return the item you want, but since Java is type-erasing it's a generic Object and you'll have to cast it. The way better thing to do is call days.getJSONObject() since that will do the cast internally. This applies to every type in the JSONObject/Array, you have getInt/getFloat/getString/ect.

Also, give Android Studio a shot when you have a chance, it's based on the really nice IntelliJ IDE and is pretty well integrated now.