With the help of [this answer][1], I have worked it out...

1. Go into `Settings` (&lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Alt&lt;/kbd&gt; + &lt;kbd&gt;S&lt;/kbd&gt;)
2. Type `Redo` in the search box.
3. Double-click on the `Redo` result
4. Select `Add Keyboard Shortcut`
5. Press &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Y&lt;/kbd&gt;
6. Click `OK`
7. Click `OK`


  [1]: https://stackoverflow.com/a/25244476

To undo an action, do one of the following:

On the `Main`Menu, choose `Edit | Undo`.
Press &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Z&lt;/kbd&gt; 

To redo an action, do one of the following:

On the `Main` menu, choose `Edit | Redo`.
Press &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Shift&lt;/kbd&gt;+&lt;kbd&gt;Z&lt;/kbd&gt; 

&lt;kbd&gt;ctrl&lt;/kbd&gt;+&lt;kbd&gt;Y&lt;/kbd&gt; deletes line by default in Android.
If you want to change this behaviour, go to Keymap under Settings and set your desired shortcut for Redo action

By the way, the same question: https://stackoverflow.com/q/25244475/5247331

You can try this one. It is simple and default:&lt;br&gt;
(&lt;kbd&gt;CTRL&lt;/kbd&gt; &lt;kbd&gt;+&lt;/kbd&gt; &lt;kbd&gt;Z&lt;/kbd&gt;)
This is for undo. &lt;br&gt;
Just press (&lt;kbd&gt;CTRL&lt;/kbd&gt; &lt;kbd&gt;+&lt;/kbd&gt; &lt;kbd&gt;SHIFT&lt;/kbd&gt; &lt;kbd&gt;+&lt;/kbd&gt; &lt;kbd&gt;Z&lt;/kbd&gt;) for **redo**. &lt;br&gt; (&lt;kbd&gt;CTRL&lt;/kbd&gt; &lt;kbd&gt;+&lt;/kbd&gt; &lt;kbd&gt;Y&lt;/kbd&gt;) it has individual task. So it would be better if you don&#39;t bother this one.&lt;br&gt;&lt;br&gt;
1. &lt;kbd&gt;CTRL&lt;/kbd&gt; &lt;kbd&gt;+&lt;/kbd&gt; &lt;kbd&gt;Z&lt;/kbd&gt; -&gt; Undo&lt;br&gt;
2. &lt;kbd&gt;CTRL&lt;/kbd&gt; &lt;kbd&gt;+&lt;/kbd&gt; &lt;kbd&gt;SHIFT&lt;/kbd&gt;  &lt;kbd&gt;+&lt;/kbd&gt; &lt;kbd&gt;Z&lt;/kbd&gt; -&gt; ***Redo***&lt;br&gt;
3. &lt;kbd&gt;CTRL&lt;/kbd&gt; &lt;kbd&gt;+&lt;/kbd&gt; &lt;kbd&gt;Y&lt;/kbd&gt; -&gt; Delete line

*Happy Coding*

&lt;kbd&gt;CTRL&lt;/kbd&gt; + &lt;kbd&gt;Z&lt;/kbd&gt; works fine and undo the work but &lt;kbd&gt;CTRL&lt;/kbd&gt; + &lt;kbd&gt;Y&lt;/kbd&gt; is a bit messy combo.
Unlike most software &lt;kbd&gt;CTRL&lt;/kbd&gt; + &lt;kbd&gt;Y&lt;/kbd&gt; here doesn&#39;t mean redo but its infact a shortcut to delete the entire line, hence you loose your code.&lt;br&gt;
So if you wanna REDO use &lt;kbd&gt;CTRL&lt;/kbd&gt; + &lt;kbd&gt;SHIFT&lt;/kbd&gt;+&lt;kbd&gt;Z&lt;/kbd&gt;(as already told above) or change keymapping.

I would like my app to run special code (e.g. resetting its state) when running in UI Testing mode. I looked at environment variables that are set when the app is running from UI Testing and there aren&#39;t any obvious parameters to differentiate between the app running normally vs in UI Testing. Is there a way to find out?

Two workarounds that I&#39;m not satisfied with are:

 1. Set `XCUIApplication.launchEnvironment` with some variable that I later check in the app. This isn&#39;t good because you have to set it in the `setUp` method of each test file. I tried setting the environment variable from the scheme settings but that doesn&#39;t propagate to the app itself when running UI Testing tests.
 2. Check for the lack of existence of the environment variable `__XPC_DYLD_LIBRARY_PATH`. This seems very hacky and might only be working now because of a coincidence in how we have our target build settings set up.

How to detect if iOS app is running in UI Testing mode

I am trying to create a 16-bit image like so: 
   
```
import skimage 
import random
from random import randint                        
xrow=raw_input(&quot;Enter the number of rows to be present in image.=&gt;&quot;)
row=int(xrow)
ycolumn=raw_input(&quot;Enter the number of columns to be present in image.=&gt;&quot;)
column=int(ycolumn)

A={}
for x in xrange(1,row):
    for y in xrange(1,column):
        a=randint(0,65535)
        A[x,y]=a 

imshow(A)
```
But I get the error `TypeError: Image data can not convert to float`.

TypeError: Image data can not convert to float

I&#39;ve just moved from Eclipse to Android Studio and am finding really weird behaviour when I try to do &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Z&lt;/kbd&gt; / &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Y&lt;/kbd&gt; to undo/redo code changes.

It hard to describe what happens exactly, but the end result is that I usually end up just losing my code and having to type it back in from memory...

The &#39;undo&#39;  and &#39;redo&#39; buttons in the IDE do seem to work fine, so maybe something is wrong with my shortcut keys (which would be surprising as I should just have a standard installation / setup).

Can anyone advise what to do, so &lt;kbd&gt;Ctrl&lt;/kbd&gt; and &lt;kbd&gt;Z&lt;/kbd&gt; / &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Y&lt;/kbd&gt; will work in the expected manner.

Android Studio undo (Ctrl-Z) / redo (Ctrl-Y) not working

I've just moved from Eclipse to Android Studio and am finding really weird behaviour when I try to do <kbd>Ctrl</kbd>+<kbd>Z</kbd> / <kbd>Ctrl</kbd>+<kbd>Y</kbd> to undo/redo code changes.
It hard to describe what happens exactly, but the end result is that I usually end up just losing my code and having to type it back in from memory...
The 'undo' and 'redo' buttons in the IDE do seem to work fine, so maybe something is wrong with my shortcut keys (which would be surprising as I should just have a standard installation / setup).
Can anyone advise what to do, so <kbd>Ctrl</kbd> and <kbd>Z</kbd> / <kbd>Ctrl</kbd>+<kbd>Y</kbd> will work in the expected manner.

I have an android device acting as a hands free client device using hfp.

[Using the following code:][1] 

I am able to receive a call and the speakers and mic are working as expected.

My problem is that I can&#39;t seem to control the volume.


I tried using the following lines of code to find the correct stream, but none of them seem to work.

I tracked the volume command being sent from the phone to the client in the class `HeadsetClientStateMachine` , line #1822 in the following link: [HeadsetClientStateMachine from lolipop][2]

    case EVENT_TYPE_VOLUME_CHANGED:
        if (event.valueInt == HeadsetClientHalConstants.VOLUME_TYPE_SPK) {
            mAudioManager.setStreamVolume(AudioManager.STREAM_BLUETOOTH_SCO, event.valueInt2, AudioManager.FLAG_SHOW_UI);
            mVgsFromStack = true;
           Log.d(TAG, &quot;EventVolumeChange STREAM_BLUETOOTH_SCO value: &quot; + event.valueInt2);
        }

When I change the volume on the phone, I do see the log showing the updated value of the sound, which means that the `setStreamVolume()` method is being called, but the volume doesn&#39;t change.

Does anyone know what could be causing this issue?


**EDIT:**

I am still looking for an answer and am now looking toward the audio HAL implementation. I suspect that the link between the HAL and the audio driver is somehow incorrect... I don&#39;t know much about low level implementation and am not sure what I should be looking for.


  [1]: http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android-apps/5.0.0_r1/com/android/bluetooth/hfpclient/
  [2]: http://grepcode.com/file_/repository.grepcode.com/java/ext/com.google.android/android-apps/5.0.0_r1/com/android/bluetooth/hfpclient/HeadsetClientStateMachine.java/?v=source

Bluetooth hands free client volume control

So Retrofit 2.0.0 was recently released and theres not really any updated examples on how to use it, but im trying to implement it for a basic API call. Im getting a 

    java.lang.IllegalArgumentException: Unable to create converter for class` 

caused by 

    Caused by: java.lang.IllegalArgumentException: Could not locate converter for class orbyt.app.dataclass. Tried:
    * retrofit.OkHttpBodyConverterFactory

When trying to make the api call.

(Retrofit) Could not locate converter for class crashing app

Whenever my device (Nexus 5, Android M Preview 3) connects via USB, the USB config always defaults to &quot;charging only&quot;. 

This is quite problematic because the USB port on my device is faulty and sometimes disconnects and reconnects when bumped and so I have to manually change the mode to MTP (media transfer protocol) from the notification drawer each time.

- Debugging mode is enabled
- Develop settings -&gt; USB Configuration is set to MTP.

How to set Android M default USB config to MTP rather than &quot;charging only&quot;?

I am working on Notifications and I have to use `setLatestEventInfo`. However, Android Studio shows the following error message: 

&gt; cannot resolve method setLatestEventinfo

Here is my code snippet:

    private void createNotification(Context context, String registrationID) {
        NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notification = new Notification(R.drawable.icon,&quot;Registration Successfull&quot;,System.currentTimeMillis());
        notification.flags |= Notification.FLAG_AUTO_CANCEL;
        Intent intent = new Intent(context,RegistrationResultActivity.class);
        intent.putExtra(&quot;registration_ID&quot;,registrationID);
        PendingIntent pendingIntent = PendingIntent.getActivity(context,0,intent,0);
        notification.setLatestEventInfo(context,&quot;Registration&quot;,&quot;Successfully Registered&quot;,pendingIntent);
    }

Or if their is another way to do so, kindly suggest me that.

Cannot Resolve Method setLatestEventInfo

I was going through the official doc about the new Permissions model in Android M. It talks about the `shouldShowRequestPermissionRationale()` function which returns `true` if the app has requested this permission previously and the user denied the request. If the user turned down the permission request in the past and chose the Don&#39;t ask again option, this method returns `false`. 

 
But how can we differentiate between the following two cases?

&lt;b&gt;Case 1&lt;/b&gt;: The app doesn&#39;t have a permission and the user has not been asked for the permission before. In this case, shouldShowRequestPermissionRationale() will return false because this is the first time we&#39;re asking the user.

&lt;b&gt;Case 2&lt;/b&gt;: The user has denied the permission and selected &quot;Don&#39;t ask again&quot;, in this case too shouldShowRequestPermissionRationale() will return false. 

I would want to send the user to the App&#39;s settings page in Case 2. How do i go about differentiating these two cases?﻿

Android M Permissions : Confused on the usage of shouldShowRequestPermissionRationale() function

I am using Android Studio for developing Android apps. But I have heard in Android Studio it is better to have only one app in a single (one project per app) if that is right, then it will be very wasteful to open many frames for many projects. But when I searched I found that 

 - Android Studio project = Eclipse workspace
 - Android Studio module = Eclipse project

Now, if this is true, it means that Android Studio also can support a multi-app project. If yes, then, is every app in Android Studio independent like in Eclipse (i.e. they do not disturb each other by sharing any file or setting)? Or can we have many apps in a single project? If we can then is there any point to take care of?

Thanks!

Can we have multiple apps in one Android Studio project?

While I develop an Android App, I have a library which I have created as separate Android Studio project and can use it by inserting it into new projects. I insert the library by choosing &#39;File|New|Import Module...&#39; option.

The thing is that after the import, Gradle creates a hard copy of my library. If I change the library code in main external project, the code inside the project which is using the library won&#39;t get updated. 

How can I have a library and share it among many project? I need to change the library in one single place and then all other projects which are using it get the update.

I found this post also which has no answer:

https://stackoverflow.com/questions/26962948/how-to-update-imported-modules-with-code-modification-from-the-their-external-li


How to update an imported module in Android Studio?

I just copy all the jar files of `Http` but `Android Studio` cann&#39;t import all these jar files.It gives an error : 
`Cannot resolve symbol HttpGet,HttpClient,HttpResponse`.

My `Activity` file is here:-

   

    


    public class MainActivity extends AppCompatActivity {

    ArrayList&lt;Product&gt;  productslist;
    ProductAdapter adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        productslist = new ArrayList&lt;Product&gt;();
        new JSONAsyncTask().execute(&quot;http://opencart.codeniques.com/myshop/?route=feed/web_api/products&amp;id=60&amp;key=test123&quot;);

        ListView listView = (ListView)findViewById(R.id.list);
        adapter = new ProductAdapter(getApplicationContext(),R.layout.row,productslist);

        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) {
                Toast.makeText(getApplicationContext(),productslist.get(position).getName(),Toast.LENGTH_LONG).show();
            }
        });
    }

    class JSONAsyncTask extends AsyncTask&lt;String,Void,Boolean&gt;{

        ProgressDialog dialog;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            dialog = new ProgressDialog(MainActivity.this);
            dialog.setMessage(&quot;Loading, please wait&quot;);
            dialog.setTitle(&quot;Connecting server&quot;);
            dialog.show();
            dialog.setCancelable(false);
        }

        @Override
        protected Boolean doInBackground(String... params) {
            try{
                HttpGet httppost = new HttpGet(params[0]);
                HttpClient httpclient = new DefaultHttpClient();
                HttpResponse response = httpclient.execute(httppost);

                int status = response.getStatusLine().getStatusCode();

                if(status == 200){
                    HttpEntity entity = response.getEntity();
                    String data = EntityUtils.toString(entity);

                    JSONObject jsono = new JSONObject(data);
                    JSONArray jarray = jsono.getJSONArray(&quot;products&quot;);

                    for (int i = 0; i &lt; jarray.length(); i++) {
                        JSONObject object = jarray.getJSONObject(i);

                        Product actor = new Product();

                        actor.setId(object.getString(&quot;id&quot;));
                        actor.setName(object.getString(&quot;name&quot;));
                        actor.setDescription(object.getString(&quot;description&quot;));
                        actor.setHref(object.getString(&quot;href&quot;));
                        actor.setPrice(object.getString(&quot;pirce&quot;));
                        actor.setImage(object.getString(&quot;thumb&quot;));
                        actor.setSpecial(object.getString(&quot;special&quot;));
                        actor.setRating(object.getString(&quot;rating&quot;));

                        productslist.add(actor);
                }
                    return  true;
                }
            }catch (JSONException e){
                Log.e(&quot;Error :&quot;,e.getMessage());
            }catch (ParseException e){
                Log.e(&quot;Error :&quot;,e.getMessage());
            }catch (IOException e){
                Log.e(&quot;Error :&quot;,e.getMessage());
            }catch (Exception e){
                Log.e(&quot;Error :&quot;,e.getMessage());
            }
            return  false;
        }
        @Override
        protected void onPostExecute(Boolean aBoolean) {
            dialog.cancel();
            adapter.notifyDataSetChanged();
            if(aBoolean == false){
                Toast.makeText(getApplicationContext(), &quot;Unable to fetch data from server&quot;, Toast.LENGTH_LONG).show();
            }
        }
    }}
and here my `gradle` is here:-

    apply plugin: &#39;com.android.application&#39;
    android {
    compileSdkVersion 23
    buildToolsVersion &quot;22.0.1&quot;

    defaultConfig {
        applicationId &quot;android.catalyst.com.newjsonarray&quot;
        minSdkVersion 16
        targetSdkVersion 23
        versionCode 1
        versionName &quot;1.0&quot;
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile(&#39;proguard-android.txt&#39;), &#39;proguard-rules.pro&#39;
        }}}
    dependencies {
    compile fileTree(dir: &#39;libs&#39;, include: [&#39;*.jar&#39;])

    testCompile &#39;junit:junit:4.12&#39;
    compile &#39;com.android.support:appcompat-v7:23.0.1&#39;
    compile &#39;com.android.support:design:23.0.1&#39;}




Cannot resolve symbol HttpGet,HttpClient,HttpResponce in Android Studio

Once upon a time, particularly in Eclipse-land, Lint would run on every build, and so if you failed Lint checks, you would find out immediately. With Android Studio (tested on 1.3), Lint does not run by default on a build. Newcomers might make mistakes that Lint would check, but since Lint doesn&#39;t actually run, the newcomers don&#39;t find out about them.

(IOW, if a Lint test did not run in a forest, is there really a Lint test?)

Comments on [this blog post][1] show how to kinda sorta get Lint to run as part of a build:

- Edit the project configuration
- In the General tab of the configuration, scroll down and fold open the &quot;Before launch&quot; panel
- In that panel, add a step to &quot;Run Gradle Task&quot; named `lint` for your module

However, this runs command-line Lint, resulting in reports written in XML and HTML to your hard drive. That works, but it would be cleaner to have Android Studio run its in-IDE Lint checks, so the results show up in an IDE panel.

Is there a way to set up a project build to perform the in-IDE Lint checks?

Bonus points if it could be set up to *only* run Lint, not the full analysis done by Analyze &gt; Inspect Code. While the full analysis is occasionally useful, Lint is slow enough as it is, let alone the dubiously-useful other analysis performed by Android Studio (e.g., spellchecking).

While setting this up would not be a great plan for all projects (Lint scans are slow), for newcomers to Android, it might be an appropriate move.

  [1]: http://www.kiodev.com/android-studio-lint-options/

How Do We Configure Android Studio to Run Its Lint on Every Build?

I get this error in Android Studio:

&gt; Can&#39;t start Git: /usr/bin/git
&gt;            Probably the path to Git executable is not valid.

It gives me an option to fix it, where it takes me to the area in Android Studio to set the path to git. I see it is set to 

&gt; /usr/bin/git

And I check that path, and that path is indeed the path to the git executable. Why is Android Studio unable to start git?

**EDIT: When I try to use git commands in the Android Studio terminal it says:**

&gt; Agreeing to the Xcode/iOS license requires admin privileges, please
&gt; re-run as root via sudo.



Content Type	Original Author	Original Content on Stackoverflow
Question	ban-geoengineering	View Question on Stackoverflow
Solution 1 - Android	ban-geoengineering	View Answer on Stackoverflow
Solution 2 - Android	Areeb Mahmood	View Answer on Stackoverflow
Solution 3 - Android	Vitaly Zinchenko	View Answer on Stackoverflow
Solution 4 - Android	Mafujul	View Answer on Stackoverflow
Solution 5 - Android	Ekamjit Singh	View Answer on Stackoverflow

Android Studio undo (Ctrl-Z) / redo (Ctrl-Y) not working

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Solution 3 - Android

Solution 4 - Android

Solution 5 - Android

TypeError: Image data can not convert to float

How to detect if iOS app is running in UI Testing mode

Attributions