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ERROR android-emu/android/qt/qt_setup.cpp:28:Qt library not found at ..\emulator\lib64\qt\lib Could not launch 'C:\Users: No such file or directory

I am trying to work with the native native for a school project, but when executing the following command in cmd: emulator -version he returned this error to me:
[4640]:ERROR:android/android-emu/android/qt/qt_setup.cpp:28:Qt library not found at ..\emulator\lib64\qt\lib
Could not launch 'C:\Users\gusta..\emulator\qemu\windows-x86_64\qemu-system-i386.exe': No such file or directory
already changed the path in several ways and I think the problem is not this so if someone can help me grateful

There are two emulator executables in the sdk (as of now):
sdk/tools/emulator
sdk/emulator/emulator
The emulator executable has to be added in the PATH variable, in a way so that
sdk/emulator/emulator comes before sdk/tools/emulator

Do this to solve the error:
Edit the system environment variables
Make sure you have set user variable for ANDROID_HOME
Remove any variable /path/to/android-sdk/tools from user and system environment variable.
Save and exit

To resolve this error:
Your system variables should look like below:
“C:\Users\username\AppData\Local\Android\Sdk” -ANDROID_HOME
“C:\Users\username\AppData\Local\Android\Sdk\tools\bin” -PATH
“C:\Users\username\AppData\Local\Android\Sdk\platform-tools” -PATH
“C:\Users\username\AppData\Local\Android\Sdk\emulator” - PATH
“C:\Users\username\AppData\Local\Android\Sdk\tools" -PATH
This worked for me.

Based on the answer of IronBlossom.
On mac these are the important environment variables that need to be adjusted.
export PATH=$PATH:$ANDROID_HOME/emulator
export PATH=$PATH:$ANDROID_HOME/tools
Make sure that emulator comes before tools

Is it possible to allocate these folders in another place?

I am installing Android Studio and I have by default the path C:\Users\Administrator\AppData\Local\Android\sdk to set my SDK. If I choose this option, some folders appeared on the path C:\Users\Administrator.
These folders are:
.android
.AndroidStudio1.3
.oracle_jre_usage
.gradle
To be a little more cleaner I tried to wrap all these folders into another folder but each time I run Android Studio it gives to me the option to configure again the settings. If I configure them again, the folders re-appeared on the path C:\Users\Administrator.
What can I do to wrap these folders into another one or to set another location for them and that the settings will be saved?
EDIT: I prove the solutions on the blog of the answer provided by Rahul Tiwari but I only could get that the folder .android will be in the new folder. The rest folders are at the same location after the changes.
EDIT 2: According to the blog provided by Rahul Tiwari to move the folder .gradle I change the default settings of Android Studio:
File > Other Settings... > Default Settings... > Build, Execution, Deployment > Gradle
Here I have as Service directory path: C:/Users/Administrator/AndroidStudio/.gradle
But the folder .gradle still appears on the path C:/Users/Administrator.
EDIT 3: Trying to remove the folder .AndroidStudio1.3 I changed these lines:
#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to user installed plugins folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
# idea.plugins.path=${idea.config.path}/plugins
#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE logs folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
# idea.log.path=${idea.system.path}/log
to these:
#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to user installed plugins folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
idea.plugins.path=${C:/Users/Administrator/AndroidStudio/.AndroidStudio1.3/config}/plugins
#---------------------------------------------------------------------
# Uncomment this option if you want to customize path to IDE logs folder. Make sure you're using forward slashes.
#---------------------------------------------------------------------
idea.log.path=${C:/Users/Administrator/AndroidStudio/.AndroidStudio1.3/system}/log
but I also couldn't move the folder.
EDIT 4: This is the blog that I mention before (Thank you very much Rahul Tiwari). I post it here because his answer was deleted.
Thanks in advance!

Finally, I got the solution to move three of the folders that I put above. I think it could be interesting to put here the problems that I faced and the changes that I made to solve them.
I'm going to investigate about the last folder, .oracle_jre_usage, and I will complete this answer if I got a solution for it. Look that I complete the solution for .gradle folder.
To move .android folder
Really, following the steps of the blog that Rahul Tiwari provided, this folder could been moved. Nevertheless I'm going to put here all the process:
You have to move your .android folder, after closing Android Studio (if you have it running), to the folder in which you want that it will be stored, in my case, C:\Users\Administrator\AndroidStudio.
BEWARE WITH THE SPACES IN THE NAME OF THE NEW FOLDER, IT COULD GIVE TO YOU PROBLEMS (AS ME). I mean, Android Studio, New Folder or similars.
If you are on Windows, you can do right-click on My Computer > Properties > Advanced System Settings > Environment Variables and create a new environment variable named ANDROID_SDK_HOME and as value you have to put the new path in which .android folder will be stored. It's the same path in which you have moved the .android folder in the step above.
Click "OK" button to accept your changes.
Re-launch Android Studio and look that the .android folder doesn't appear in the default path.
To move .AndroidStudio1.3 folder
With that folder I had some problems because I didn't noticed some details that were very important. Here the steps that I followed:
First of all, you have to close Android Studio before doing any change.
After, you have to move the folder .AndroidStudio1.3 to the path in which you want that it will be stored.
Next, you have to go to the folder in which Android Studio were installed and open "idea.properties" file and changed the lines where idea.config.path and idea.system.path appeared for the new path in which these folders are going to be located.
They have to be something similar to this:
idea.config.path=C:/Users/Administrator/AndroidStudio/.AndroidStudio1.3/config
idea.system.path=C:/Users/Administrator/AndroidStudio/.AndroidStudio1.3/system
Here I had three problems so please be careful:
Notice that the paths are with / and not with \ as Windows put by default.
DON'T CHANGE the values of idea.plugins.path and idea.log.path (My EDIT 3). Be sure that you are changing idea.config.path and idea.system.path values.
Uncomment the lines in which idea.config.path and idea.system.path appears. I mean, remove the # that they have at the begining of each line.
The last step, re-launch Android Studio.
Searching and doing some proves I also get the solution to move .gradle folder. The steps are the same as .android folder but I put here all the steps (with the values that changed) to avoid any confusion. Here it is:
To move .gradle folder
You have to move your .gradle folder, after closing Android Studio (if you have it running), to the folder in which you want that it will be stored, in my case, C:\Users\Administrator\AndroidStudio\.gradle.
BEWARE WITH THE SPACES IN THE NAME OF THE NEW FOLDER, IT COULD GIVE TO YOU PROBLEMS (AS ME). I mean, Android Studio, New Folder or similars.
If you are on Windows, you can do right-click on My Computer > Properties > Advanced System Settings > Environment Variables and create a new environment variable named GRADLE_USER_HOME and as value you have to put the new path in which .gradle folder will be stored. It's the same path in which you have moved the .gradle folder in the step above.
Click "OK" button to accept your changes.
Re-launch Android Studio and look that the .gradle folder doesn't appear in the default path.

How to move data from %UserProfile%
The folders will still remain under %UserProfile%, but not the data.
Move .android
Android Studio is closed
Add Environment Variable
Create "System variable":
Variable name: ANDROID_SDK_HOME
Variable value: D:\Android
Move .AndroidStudio
This is a example with Android Studio version 3.1
Start Android Studio
Help -> Edit Custom Properties...
Click Yes to create file
Edit file with:
idea.config.path=D:/Android/.AndroidStudio3.1/config
idea.system.path=D:/Android/.AndroidStudio3.1/system
The file "idea.properties" is located under:
%UserProfile%/.AndroidStudio3.1/config
Close Android Studio
Delete all under %UserProfile%/.AndroidStudio3.1 except the file "/config/idea.properties"
Optional: Delete older version folders of .AndroidStudio
Don't edit "Android Studio/bin/idea.properties". When updating Android Studio this file is cleared.
Move .gradle
Start Android Studio
File -> Settings... -> Gradle
Change "Service directory path" to:
D:/Android/.gradle
Update Android Studio
Start Android Studio
"Import Studio settings from" is showed
Select: D:/Android/.AndroidStudio3.0/config

I think most of the others answers address the issue, But I found more simple way for windows by adding few environment variables . (Might work for mac as well, I didn't test though)
ANDROID_SDK_ROOT - path to the SDK installation directory
default path - C:\Users\XXXX\AppData\Local\Android\Sdk
Add enviroment variable ANDROID_SDK_ROOT - set value to desired location
Eg: =E:\Android\local\Android\Sdk
For .android folder
default path - C:\Users\XXXX\.android
Add enviroment variable ANDROID_SDK_HOME- set value to desired location
Eg: = E:\Android
For .gradle folder
default path - C:\Users\XXXX\.gradle
Add enviroment variable GRADLE_USER_HOME - set value to desired location
Eg: = E:\Android\.gradle
For .androidstudioXXX
Android Studio-> Help-> Edit Custom Properties
Add below lines
idea.config.path=E:/Android/.AndroidStudio4.0/config
idea.system.path=E:/Android/.AndroidStudio4.0/system
Add environment variable STUDIO_PROPERTIES - set value to desired location
Eg: = E:\Android\idea.properties
Finally don't forget to copy files from the original location to the new location.
Source : https://developer.android.com/studio/command-line/variables
Please see the end of the page to know how to add the environment variable on Windows, Mac or Linux

At least for Android 3.0 the steps in the accepted solution are not enough to be able to run the emulators after moving the .android folder (let's say you moved the folder from c:\Users\<username>\.android to I:\Programs\AppData\.android).
In addition you need to
Copy (or leave) files adbkey and adbkey.pub in old location (i.e. c:\Users\<username>\.android\adbkey, c:\Users\<username>\.android\adbkey.pub)
Replace the old location path string C:\Users\<username>\ in all .INI files found in the new avd location (i.e. in I:\Programs\AppData\.android\avd) with the new location path string I:\Programme\AppData\
Delete all *.qcow2 files from the new avd location (i:\Programme\AppData\.android\avd) which contain the old location path string c:\Users\<username>\. Check Qcow2-files refer to incorrect/nonexistent base-images for an alternative to delete the *.qcow2 files. If you delete the files all data in the emulator is lost, in this case you will get a clean version of Android, like after a hard reset.

To change default .gradle folder using Android Studio 2.2
Open folder of .AndroidStudiox.x (x.x is the version you use) -> config -> options -> gradle.settings.xml file
just right click to open it with wordpad, you should only see 1 option name = serviceDirectoryPath, change the value of that to desired path
remember use / not backward slash \ for folder even in Windows OS

I use junction.exe from Sysinternals to make my Java/Android Studio fully "portable" in Windows:
I have "AndroidStudio" installed in a folder "work".
I have "Java\jdk1.8.0_77_x64" in the same "work".
In the same folder "work" I copied the original ".android", ".AndroidStudio2.2" and ".gradle" folders (from C:\Users\<YourProfile>).
Then in the same parent folder "work" I have copied "junction.exe".
Finally in the same "work" I have a batch __init__.bat with content listed below.
Closed Android Studio and deleted original ".android", ".AndroidStudio2.2" and ".gradle" folders (from C:\Users\<YourProfile>).
Run __init__.bat (as Administrator to set also the JAVA_PATH via setx) to create the new junctions then restart Android Studio. This solution works also after I reimage Windows, just have to remeber to run first the mentioned bat...
PS: When I update java or upgrade Android I have to remeber to tweak the bat with the new revision numbers
Content of __init__.bat:
#echo off
#SET mySrcPath=%cd%
#rem echo "%myPath%"
#rem JAVA_HOME = D:\work\Android\Java\jdk1.8.0_77_x64\
#SET myJavaTarget=Java\jdk1.8.0_77_x64\
#SET myJavaPath=%mySrcPath%\%myJavaTarget%
#if not exist "%myJavaPath%" (
#echo CANNOT FIND myJavaPath = "%myJavaPath%"
#goto _exit_
)
#rem echo myJavaPath = "%myJavaPath%"
#setx JAVA_HOME %myJavaPath%
#SET myTargetPath=%USERPROFILE%
#SET myCopy1=.android
#SET myCopy2=.AndroidStudio2.2
#SET myCopy3=.gradle
#SET mySource1="%mySrcPath%\%myCopy1%"
#SET mySource2="%mySrcPath%\%myCopy2%"
#SET mySource3="%mySrcPath%\%myCopy3%"
#SET myTarget1="%myTargetPath%\%myCopy1%"
#SET myTarget2="%myTargetPath%\%myCopy2%"
#SET myTarget3="%myTargetPath%\%myCopy3%"
#rem echo.
#if not exist %mySource1% (
#echo CANNOT FIND mySource1 = %mySource1%
#goto _exit_
)
#if not exist %mySource2% (
#echo CANNOT FIND mySource2 = %mySource2%
#goto _exit_
)
#if not exist %mySource3% (
#echo CANNOT FIND mySource3 = %mySource3%
#goto _exit_
)
#if not exist %myTarget1% (
#echo creating myTarget1 = %myTarget1% from mySource1 = %mySource1%
#junction.exe %myTarget1% %mySource1%
) else (
#echo myTarget1 = %myTarget1% ALREADY EXISTS !!!!!!
)
#if not exist %myTarget2% (
#echo creating myTarget2 = %myTarget2% from mySource2 = %mySource2%
#junction.exe %myTarget2% %mySource2%
) else (
#echo myTarget2 = %myTarget2% ALREADY EXISTS !!!!!!
)
#if not exist %myTarget3% (
#echo creating myTarget3 = %myTarget3% from mySource3 = %mySource3%
#junction.exe %myTarget3% %mySource3%
) else (
#echo myTarget3 = %myTarget3% ALREADY EXISTS !!!!!!
)
:_exit_
#echo exiting...
#pause

How to generate javadocs for android project

I followed all the instruction given on stackflow, but unfortunately not able to generate doc file for my android project.
If I am not mentioning class path on last step of java doc generation, then getting "Android reference" error.
And if using it, then getting "javadoc: error - The -classpath option may be specified no more than once." error.
Using classpath:
-classpath "D:\Android 4.2 SDK\android_sdk\platforms\android-15\android.jar"
Am I using correct class path command ?
Please help me out.
Environment used:
Eclipse indigo

If you use Intellij IDEA go to Tools - Generate JavaDoc... Specify all the settings and set params: -bootclasspath [path]\android-sdk\platforms\android-{version}\android.jar -encoding UTF-8 -docencoding utf-8 -charset utf-8
More information is in this post.

Have You followed these steps (from www.mtholyoke.edu)? This works on my Project....if not and You get an error, please write here which error You get.
Project -> Generate Javadoc
In the "Javadoc command" field - browse to find javadoc.exe
• On the computers in the Clapp CS lab that is C:\JBuilderX\jdk1.4\bin\javadoc.exe
• On other computers it would be \bin\javadoc.exe
Check the box next to the project/package/file for which you are creating the javadoc
In the "Destination" field browse to find the desired destination (for example, the root directory of the current project).
Leave everything else as it is.
Click "Finish"
Javadoc should be in the destination folder. Open "index.html"
EDIT
I found a thread here in Stackoverflow with a lot of tipps, try this:
Javadoc in Eclipse failing to recognize packages
NEXT EDIT
It is only a possibility, but You specified Your classpath as:
"D:\Android 4.2 SDK\android_sdk\platforms\android-15\android.jar"
I know that eclipse got some problems with spaces inside a path. So the first part "Android 4.2 SDK" has to be specified without spaces, maybe here is the issue. But be aware, if You change this path, You have to set everywhere the new path where You have definded it.

I'm using the command line. I have also updated to Eclipse Kepler. It seems to execute javadoc differently? I'm investigating. But try this:
read the javadoc manual. It's confusing and doesn't tell you what to do, but, here's an example that should get you going.
Create a file called "options"
Add to the file this:
-d target-bin
-stylesheetfile style.css
-use
-splitindex
-windowtitle 'My Project Name Class Specification'
-doctitle 'My Project Name Class Specification'
-header '<b>My Project Name</b><br><font size="-1">0.1.5-alpha</font>'
-bottom 'Copyright 2014 My Company or Myself. All rights reserved.'
-group "Group Of Packages" "com.mypackage.*"
-overview overview.html
-exclude 'android'
-subpackages 'com.mypackage:android'
-charset utf-8
-encoding UTF8
-quiet
-sourcepath ../myProject/src;..\..\..\android-sdks\sources\android-19
Then on the command line type:
javadoc #options
Now, in Kepler, the "Generate Javadoc" dialog box says "What is the javadoc command line"...I suspect I'll have to type something like this. But don't know.
Hopefully this quick example will give you a start on how to get it done for your purposes.
By the way, I created a generic Eclipse project called "javadoc" in my Workspace so I could manage the files.

How to add android tools dir to windows 7 path?

I like to quickly start hierarchyviewer. At the moment i use the prompt to go navigate to .... \AppData\local\android\android-sdk\tools\ and then hierarchyviewer
I think i need to add something to windows 7 path, but i don't know what to do exactly.
Any suggestions?
regards

Suppose you have download and install Android SDK, and extract it in some drive. There are two methods to set PATH:
Use command prompt :
set path=%path%;D:\android-sdk-windows\tools;
Another is follow these steps :
My Computer->Property->Advanced->Environment Variables->Edit Path Variable and add “D:\ android-sdk-windows\tools” into the Path Variables.

In your computer properties-advance-environment variables-system variable ,and you find variable "path", add your android/tools path in it.
The operate like add java.exe in you computer path

C:\Users\user\AppData\Local\Android\Sdk\tools\bin
and add it you your Path User variable

Problem with emulator in ANdroid

invalid command-line parameter: ..\Documents\android-sdk-windows\tools/emulator-arm.exe.
Any idea how can I solve that problem?

The only problem here is : you have to remove 1 extra space from the Eclipse path where you have declared your Android SDK from your local path.
This u can verify by following steps :
1. Eclipse->Windows->Preferences->Select Android option from left column.
2. See the path : in my case its : D:\Andriod SDK\android-sdk-windows
3. If u observe, there is a space in Android & SDK.
4. Close eclipse and go to the actual D location.
5. Change the name of the Android SDK folder to AndroidSDK. (Just remove the space in betn).
6. Restart the eclipse again and define the new path.
BINGO... Your emulator will run without any problem.
Thanks
Saurabh M. Chande