Develop Reference

Android Studio Template package name

I tried make android studio template like activity template by this instruction
Current package set in globals.xml.ftl
<global id="srcOut" value="${srcDir}/${slashedPackageName(packageName)}" />
and create template file
<instantiate from="src/app_package/LifecycleFragment.java.ftl"
to="${escapeXmlAttribute(srcOut)}/${className}.java" />
It force my template file to src/main/java/myPackageName
But my current package is kotlin
How can i create template in current selected folder?

Sorry if I'm late with my answer, but maybe it will be useful for someone.
To change the source package from java to kotlin try add this line to globals.xml.ftl:
<global id="kotlinMainSourceSet" value="${srcOut?replace('java','kotlin') />
Use it in your receipt.xml.ftl as following:
! Replace SomeClass.kt.ftl with your class in app_package;
! Replace your_needed_path with path, in which you would like to put the file
! Replace someClassName with the id of the className from template.
<instantiate
from="src/app_package/SomeClass.kt.ftl"
to="${escapeXmlAttribute(kotlinMainSourceSet)}/${your_needed_path}/${someClassName}.kt" />
In addition I'll answer on the #AlexeiKorshun question with which I've faced too: applicationIdSuffix is added, while creating a directory. This can be easily fixed by overriding srcOut in your globals.kt.ftl with following:
<global id="srcOut" value="${srcDir}/${slashedPackageName(packageName?replace('.dev|.qa2|.stage', '', 'r'))}" />
.dev/.qa2/.stage are added as an example,please replace them with yours.

Launcher icon Xamarin Android not found

I'm doing a Hello World in Xamarin Android, but when I try to change the launcher icon, it throws the following error: "No resource found that matches the given name (at 'icon' with value '#drawable/icon')."
Actually I don't have any "icon" in my resources, the icons' names are ic_launcher:
And my manifest looks like this:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="HelloWorldXamarinAndroid.HelloWorldXamarinAndroid" android:versionCode="1" android:versionName="1.0" android:installLocation="preferExternal">
<uses-sdk android:minSdkVersion="16" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<application android:label="Hi android" android:icon="#drawable/ic_launcher"></application>
</manifest>
I've already cleaned the project and tried to rebuild it, can someone help me?
If I change all the images' names to "Icon.png" and the manifest with "#drawable/Icon", it works, my question is, why Xamarin doesn't work with other names
I found the problem, in Main Activity is set the icon too, so it's necessary to set the new name there too:
[Activity(Label = "HelloWorldXamarinAndroid", MainLauncher = true, Icon = "#drawable/ic_launcher")]
public class MainActivity : Activity
{
...
}

Right click the Droid project and select Android Manifest from the menu list. Under Application Icon you will see which icon the application is referencing.
Below is a picture of where the icon is being references.

Using Crosswalk in an Android Cordova Project with Embedded WebView

I have an existing Android Cordova project which uses an embedded WebView. What this means is that the Activity does not extend CordovaActivity, but instead embeds the SystemWebView and initializes within the onCreate.
The following is currently how this is being done:
Within the layout XML file
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
.... other layout elements not related to Cordova....
<org.apache.cordova.engine.SystemWebView
android:id="#+id/cdvWebView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</RelativeLayout>
Within the Activity's onCreate:
SystemWebView systemWebView = (SystemWebView) findViewById(R.id.cdvWebView);
CordovaWebView cdvWebView = new CordovaWebViewImpl(new SystemWebViewEngine(systemWebView));
ConfigXmlParser parser = new ConfigXmlParser();
parser.parse(this);
cdvWebView.init(this, parser.getPluginEntries(), parser.getPreferences());
Due to the bug in Lollipop versions 5.0.+ missing the "set" button, I want to implement the Crosswalk plugin into the project.
Unfortunately, all the documentation I'm finding assumes that a typical Cordova install is being used. I haven't been able to get the embedding and initialization of the XWalkWebView working correctly and keep getting a blank white screen.
Has anybody has success with a similar scenario?

I'm not sure, but this might answer your question. It seems to show implementing an XWalkWebView outside of a typical cordova project:
https://github.com/kurli/crosswalk-website/wiki/How-to-use-Crosswalk-Embedded-API-on-Android

Where are the settings of a preferences screen stored?

I know this question is a little stupid but I cannot find where the settings of my preferences screen are stored.
I am using shared preferences this file is located at /data/data/my.package.name/shared_prefs/common.xml. However when I change something the changes are stored. I even implemented custom controls which can store their information so far. But however I cannot figure out where the settings are stored. /data/data/my.package.name/ is only one xml file which does not contain any related information. I also checked the virtual directories for multi user devices with no luck.
Here is my xml:
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:custom="http://schemas.android.com/apk/res/my.package.name"
android:persistent="true" >
<PreferenceCategory android:title="#string/settings_basics_group" >
<EditTextPreference
android:key="nickname"
android:persistent="true"
android:positiveButtonText="#string/setting_change_name"
android:title="#string/settings_username" />
<my.package.name.controls.EmailPreference
android:key="mail"
android:title="#string/settings_email"
custom:domains="#array/known_email_domains" />
<Preference
android:summary="Mars"
android:title="#string/settings_current_location" />
<my.package.name.controls.DatePreference
android:key="birthday"
android:title="#string/settings_birthday" />
</PreferenceCategory>
</PreferenceScreen>
I would be really happy if somebody could explain me where these settings are stored.

For older Android versions including Jelly Bean (API 16) and older the answer of Dalmas is correct. So feel free to upvote that answer.
Beginning with Jelly Bean MR1 (API 17) there are new rules about path due the multiuser support:
I figured out that the settings file is located in /data/user/##/my.package.name/shared_prefs/my.package.name_preferences.xml where ## is my numeric user id.
For solving that path you need the ApplicationContext there you need to reflect mLoadedAPK and there mDataDir. For now I'm happy with that I could get the path from the debugger. Sorry to everyone who wants a ready to use code snippet, you have to do that yourself.

The app preferences are stored in the default shared preferences that you can retrieve with PreferenceManager.getDefaultSharedPreferences().
The XML file itself is located at /data/data/YOUR_PACKAGE_NAME/shared_prefs/YOUR_PACKAGE_NAME_preferences.xml

Multiple API keys in the same Android project

Is it possible to specify multiple keys for Google Maps Android API in the same code base?
It looks like I have to change the key in manifest file each time I change keystore. It's not very convenient, imho, if you need to test the app signed with keys form debug and release keystores.

I added both keys in the manifest at once. Like this
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
..
android:versionCode="1"
android:versionName="1.0" >
<!-- RELEASE key -->
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="my-release-keu" />
<!-- DEBUG key -->
<meta-data
android:name="com.google.android.maps.v2.API_KEY"
android:value="my-debug-key" />
</application>
</manifest>
Apparently, this works. Looks like Google code is smart enough to use relevant key automatically.

I don't think this is what you want to do. You should add both debug and release SHA1 key to API key on Google Developer API Console. Take a look at this answer

AFAIK, there is no programmatical form on doing this. For comodity, you can define API keys in strings.xml, and retrieve it from the manifest

String debugMapKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
String releaseMapKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
String mapKey = BuildConfig.DEBUG ? debugMapKey : releaseMapKey;
MapView mv = new MapView(this, mapKey);