PiCroft posted:

This is largely for my own sanity, but I'm curious about something. We want to gather touch data for an app and write the type of touch to a database. While we can get the touch type easily enough, I noticed there was a very handy looking function called actionToString() in MotionEvent that translates the touch type directly to a sensible string. For somer reason, any attempt to use it failed; intellisense didn't detect it, manually calling it results in unrecognized error and I can confirm it was indeed there in the source code (its build-in Android stuff).

On researching it, it turns out this call is hidden on earlier version of Android SDK (pre 19 I think), despite the fact that literally all it does is perform a switch statement and returns a string with the action type.

Does anyone know why the hell this is hidden?

HardDisk posted:

I'm developing an application that depends on a webservice that it is still undeployed and as such, it is only running on my local machine on localhost:5000. So far so good.

In the chrome://inspect/#devices page, I can set up port forwarding (I set up 5000 to localhost:5000) and in Chrome it works quite well. The Devices page also warns that Chrome must remain open for the forwarding to work, but that's OK, I guess.

The problem that I'm having is that when I switch out from Chrome to my application, the forwarding stops working and Chrome stops showing up on the Devices page on the host computer. My best guess is that Chrome must be always in the foreground if I need the forwarding to work, but then I can't test my application this way.

Is there any way for that to work? Having Chrome open in the background is fine, but I can't test my application if it has to be open on the foreground.

Of course, I can just deploy the webservice, but

HardDisk posted:

Thanks, didn't know about adb forward.

kitten smoothie posted:

Is there any on-device way to simulate a poo poo network? I know you can do this in the official emulator, but I want to do this on a real device. If it needs to be rooted, that's fine, my development device already is.

I like how iOS has the Network Link Conditioner built into the phone. I'm almost about to just go buy a prepaid T-Mobile SIM and lock the phone to EDGE only.

more like dICK posted:

Coming back to Android after spending a long time with Java on the server. I have an existing Java client for a REST API that uses Apache HttpComponents, is there any issue using this instead of okhttp/retrofit? Related question, is there a good place to stay up to date on Android libraries and design?

Sereri posted:

Does anyone have a good idea for implementing something like this aside from a PopupWindow containing a Viewpager with 2 Fragments?

edmund745 posted:

Yea it did install it. It just has a generic icon (I didn't provide any icon). And the page doesn't say it installed it.

Other people asking this question always get referred to this page: http://developer.android.com/tools/device.html
but that page doesn't mention that the app gets installed upon running it on the device....

I never had any android device before a couple days ago, and so a lot of aspects seem,,,,, odd. Like, why is there no file explorer program on there?.... Or is there?
(I know you can get file explorer apps, but it would seem to be a necessary thing to have anyway, so why is one not already there?)

When you connect it to the PC it is detected as a USB storage device and you can put files on it that way, but then [apparently] Android can't do anything with them. I don't get the reasoning here --- ????:>|

I did notice however that all of the apps it came pre-loaded with, were 'cloud' stuff. As in, NOTHING you do gets stored on the tablet. You have to open an account with whatever-website the thing works with, and all your sh*t gets stored online somewhere.

edmund745 posted:

I got my idiot game thing working, sort of. As far as I've gotten into it anyway....

One question: I keep getting errors in the Android Studio editor because I get capitalizations wrong in the Java language.
,,,
Like for example, trying to use "If" instead of 'if' in an if-else statement,,, and then spending five minutes trying to figure out why it says "this 'else' statement requires an if statement"

Is there any setting to get it to autocorrect capitalization errors for Java-language keywords? It tries to warn me about spelling errors in my chosen variable names, but it is ignoring the keyword capitalizations and just flagging them as an error.
I looked around in the editor/default settings/java options but didn't see anything as simple as this. :|
(I did google this matter but there is fifty million page results about people trying to get the auto-capitalization on their Android devices either turned on or turned off,,, so I could not find anything relevant)

Doghouse posted:

So for our final college project, our 3-person group, for some reason, decided to do an Android application, which none of us have ever worked on. So we are in a bit over our heads.

But basically the first iteration is going to be close to the "Tabata HIIT Timer" app - just a few screens, where you pick a workout routine and then when you start it, there is a timer for each exercise.

Kind of a random question, but does anyone have any general suggestions on how to break up the work among three people? I think the way the group lead proposed might not make any sense.

hooah posted:

My adviser wants me to build a simple Android app that logs the accelerometer and location data. I copied the layout and main activity code from here (please tell me if that's horrible code to start with), so now I have start and stop buttons. I know I want to do the logging and sensor polling off the UI thread, but I don't really have any idea how to separate them. I think once I know that, I can read the documentation for polling sensors, and I can probably figure out how to write to a text file in Java.

hooah posted:

I do appreciate the help. I'd just used the search box at developers.google.com/android, since I didn't realize there's also developer.android.com. Which is annoying.

Suran37 posted:

I'm working on an audio player app, because the few I have used in the past were slowly becoming buggy or have annoying "features".
Anyway, what would be the best way to manage the MediaPlayer object? I was tempted at first to use a singleton, but my research seems to suggest that it would be a bad idea to do so for various reasons. Any tips would be appreciated.

speng31b posted:

Just released an update to the latest app I've been working on, a prototyping/design tool. Previously we just had simple wireframe support (think super-simple vector art). Now we've added interactive screen links sort of like POP, but without having to take pictures and whatnot. Anyhow I made up a dynamic transition system for the screen links that makes for a pretty neat video:

https://www.youtube.com/watch?v=R6JpEXdHtnc

hooah posted:

I don't think I quite understand how TextViews work. I'm able to read data from the accelerometer and send it to the log, but I can't get it to display. I have an activity that's called when the user presses the "start" button on the main activity; here's its layout:

XML code:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.example.spart_000.accel_demo.DisplayData">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:minLines="1"
        android:id="@+id/xCoord" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:minLines="1"
        android:id="@+id/yCoord"
        android:layout_below="@+id/xCoord"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:minLines="1"
        android:id="@+id/zCoord"
        android:layout_below="@+id/yCoord"
        android:layout_alignParentStart="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/button_stop"
        android:onClick="stopCollect"
        android:layout_gravity="center_vertical"
        android:id="@+id/stop_button"
        android:layout_below="@+id/zCoord"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="119dp" />

</RelativeLayout>

For now, I just want to print the x, y, and z values from the accelerometer in three separate TextViews. I figured that each time the sensor changed, if it's been more than 100 ms since the last time the text was updated, it should be updated again. Here's the code from the above activity's onSensorChanged method:

Java code:

public void onSensorChanged(SensorEvent event){
    Sensor mySensor = event.sensor;

    if(mySensor.getType() == Sensor.TYPE_ACCELEROMETER){
        float x = event.values[0];
        float y = event.values[1];
        float z = event.values[2];

        Log.d(TAG, "x = " + Float.toString(x));

        long curTime = System.currentTimeMillis();

        if((curTime - lastUpdate) > 100){
            lastUpdate = curTime;
            mXTextView.setText(Float.toString(x));
            mYTextView.setText(Float.toString(y));
            mZTextView.setText(Float.toString(z));
        }
    }
}

However, nothing's being displayed in the TextViews. Why is that?

baka kaba posted:

Well they're both hitting the same last update timestamp, right? Also you can set different update speeds when you register the sensor, remember

What's your end goal here? If you're trying to do something like display the device orientation, you might be better using something like the orientation sensor or whatever, than trying to wrangle the individual sensors it uses yourself

e- orientation not rotation. I love how the android dev site is completely unreadable on mobile devices

hooah posted:

Ah, didn't read the documentation on that! This is going great. The only thing now is that it wrote the same motion data several times at the end of the file, but that's not a large concern. Thanks for all the help!

hooah posted:

I found the Handler constructor kitten smoothie was talking about, but suddenly I'm getting an error when I try to run my app over ADB: "Error: The activity 'MainActivity' is not declared in AndroidManifest.xml". I haven't changed that file in at least a couple days, and here it is:

XML code:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.user.accel_demo" >

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main"
            android:exported="true"
            android:screenOrientation="portrait" >
        </activity>
        <activity
            android:name=".DisplayData"
            android:label="@string/title_activity_display_message"
            android:parentActivityName=".MainActivity" >
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.example.user.accel_demo.MainActivity" />
        </activity>
    </application>

</manifest>

What got borked? Or is it something else?

hooah posted:

How would that help? The URI seems to be accessible, it was just getting put in the wrong part of the intent.


This worked like a charm, thank you.

hooah posted:

I'm working with another student on this app, and he's mainly doing the data analysis stuff. He told me today that sometimes the same simple movement (perhaps sliding the phone in one axis on the table) will appear on different axes in his visualizations, and other times different movements will appear on the same axis. We've both looked at the linear acceleration documentation, and it doesn't say anything about this. Where should we start looking to figure this out?

Subjunctive posted:

Subjunctive posted:

Yeah, I haven't been paying attention to Android for a couple of years, and now I feel like I need to go back and binge-watch all the episodes.

kitten smoothie posted:

Oh, and don't forget that the patch didn't fully patch the problem.

I'm really curious how many full time Android developers carry iPhones as their personal device, because we have a bigger window into the sausage factory.

hooah posted:

Is there a way to debug an app on a phone far away from me that's better than having the user install Android Studio and using TeamViewer to remote in to their machine?

PiCroft posted:

I have a quick question on the Android Location framework - I notice it has a getTime() method.

When testing, I noticed that if I set the device clock forward 6 hours and waited for a location update, the system time reported my current time +6 hours (unsurprisingly) but the location time reported my current, correct time.

My question is, where does the getTime() come from? Does it come from the satellite? If so, how reliable is it when it comes to giving a time for the users' current location? I ask because we are looking into ways of verifying the device has the correct time for the current user and if we can use this, we might not need to use a time server which relies on WiFi.

hooah posted:

I did have them send a bug report from the settings menu, but my app shows up on logcat like three times, so that's not too helpful (assuming the person installed the verbose version). This'll be fun!

Subjunctive posted:

The API description seems pretty clear that it's UTC and has to be. If the fix were based on the system clock, then the location would be catastrophically wrong whenever the system clock drifted or was reset specifically; GPS depends on high-reliability timing to function.

It doesn't seem like this API would be any less reliable across implementations than any other arbitrary Android API. Is there a history of problems with it that I don't know about?

quote:

Interesting, thanks. I guess it's also annoying that you can't reliably find out how old the fix is, since there's no way to get the current time as seen by the location system. (Which seems like the whole point of the fix time, but I guess it has other uses as well.)

Subjunctive posted:

Why is that? I came across something else that said that recently, but didn't say what problem it avoided. I'm just getting back into Android development, so these sorts of gathered lore are interesting to me.

hooah posted:

I have my project stored on Google Drive and I'm using Android Studio. This is apparently a problem now when it wasn't a couple months back when I last worked on the project, since Google Drive insists on putting desktop.ini files everywhere, and AS chokes on them. Is the only solution to move the project out of my Google Drive folder?

Subjunctive posted:

So putting a git repo on Drive will work? Wouldn't it also get the desktop.ini files sprinkled in?