Download Samsung Galaxy S2 USB driver for Android

For Android development on real device like Samsung Galaxy S2, you need to install Samsung OEM driver or USB driver. This Android OEM driver documentation will guide you where to download it… but the guide is not easy to follow.

Actually, the “Samsung USB driver” is included in the software called “Samsung Kies or PC Sync“. The following guide will show you how and where to get it.
P.S This example is using Windows 7 and Samsung Galaxy S2.

1. Samsung Phone Model

Most Samsung websites ask about what’s your phone model to download the software. The phone model number is available on the back of your phone, see figure below :

P.S Picture above is captured from Samsung website.

Note
The phone model number of my Samsung galaxy s2 is “GT-19100“.

2. Samsung Website

Go to Samsung official website : http://www.samsung.com, it will redirect to your local Samsung website automatically. Find “Support” –> “Download“, or something similar.

3. Download Samsung Kies (USB Driver)

Type your phone model number or phone name to find suitable “Samsung Kies” to download. See figure below :

Get “Samsung Kies” and install on your Windows, the “Samsung USB driver” will be installed together.
Done. Now you can debug your Android application on Samsung Galaxy S2.

Sources:- http://www.mkyong.com

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Solution: INSTALL_FAILED_INSUFFICIENT_STORAGE error in Android or Android Studio

Update Nov 2024

The INSTALL_FAILED_INSUFFICIENT_STORAGE error in Android or Android Studio typically occurs when your device or emulator runs out of available storage space to install the app. This can happen on both physical devices and Android emulators.

Common Causes:

1. Device/Emulator Storage Full: If there is not enough free storage space on the device or emulator, this error will occur.

   • Check the device's available storage by going to Settings > Storage.
   • For emulators, you can increase the storage capacity by modifying the AVD (Android Virtual Device) settings.

2. Large App Size: If your app's APK or bundle size is large and the device has limited storage, it may fail to install.

3. Cache or Temporary Files: Accumulated cache or temporary files can reduce available storage, especially if the device is heavily used.

4. App Data/Other Apps Using Space: Other apps on the device, or data from previous app installations, may be consuming space.

Solutions:

1. Free Up Storage:

   • Uninstall unused apps from the device or emulator.
   • Delete unnecessary files, such as images or videos, from the device storage.

2. Check Emulator Storage:

   • If you are using an emulator, increase the storage size in the AVD configuration.
     • Open Android Studio.
     • Go to Tools > AVD Manager.
     • Select your emulator and click Edit.
     • Increase the Internal Storage size and apply the changes.

3. Clean and Rebuild:

   • In Android Studio, try cleaning the project and rebuilding the APK:
     • Go to Build > Clean Project and then Build > Rebuild Project.

4. Check APK Size:

   • If your APK or app bundle is too large, consider optimizing your app by reducing its size.
     • Use Android App Bundles (AAB) instead of APK for smaller app sizes.
     • Compress images and assets to reduce the overall size.

5. Clear Cache and Data:

   • Clear the cache and data of the Google Play Store or other relevant apps on the device.
   • On the device, go to Settings > Apps > Google Play Store > Storage and select Clear Cache and Clear Data.

6. Use a Physical Device:

   • Sometimes emulators may not provide enough storage. If possible, test on a physical device with sufficient free storage.

Additional Debugging Tips:

• Logcat Output: Check Logcat in Android Studio for any additional error messages that can help diagnose storage issues.
• Check Disk Usage: Use adb shell or the Android Device Monitor to see disk usage in detail, especially if you're working with an emulator.

By following these solutions, you should be able to resolve the INSTALL_FAILED_INSUFFICIENT_STORAGE error.

 --------------------------------------------------------------------------------------------

Eclipse will sometimes say this:
[2010-11-20 11:41:57 - My Cool Ass Application] Installation error: INSTALL_FAILED_INSUFFICIENT_STORAGE 
[2010-11-20 11:41:57 - My Cool Ass Application] Please check logcat output for more details. 
[2010-11-20 11:41:57 - My Cool Ass Application] Launch canceled!

This is cute and utterly annoying. In fact, this has caused me to completely give up on coding boated Android/Java for the day on a few occasions. waiting for the AVD to reboot – sucks. 

This Google Groups post says to restart the emulator. Yeah, thanks Google. At first I gave the emulator the benefit of the doubt and thought, “hey, my app has an mp3 compiled into it making it rather big (12MB), maybe I should move the mp3 to the SD Card upon installation or put the mp3 somewhere online and stream it to the system. 

 Then I clicked on     Settings->Applications->Manage Applications and the Android AVD said this:

You do not have any third party applications installed.

After hours of research, I figured out that this error means nothing at all. If you reattempt to upload your project (CTRL+F11) it will not solve the non-existent error. This means that you need to either restart the AVD (Android virtual machine you are testing the project on), or sometimes it gets so bad you need to restart the emulator too. If you still get it, you need to delete the AVD and create a new instance:

  Window->Android SDK AVD Manager->Delete->New...

Sometimes the Error console will say that it just brought the old version to the front screen! This is AFTER you tell the IDE to upload and install a new version. How disrespectful! Speed is another thing to consider. I use CTRL+F11 to hurry up and upload the app to the device and run it. If you edit your XML file to say wrap the contents of the LinearLayout tag in ScrollView tags, this causes Eclipse to slow down to a crawl. Not only that, the project will be loaded into the emulator AVD and you will see a nasty red X next time you go back to the XML to view it and not know why it’s there. – Take your time with this gigantic Cthulhuian slow IDE.

Or 

You need to increase the Android emulator's memory capacity, there are 2 ways for that: 1- Right click the root of your Android Project, go to "Run As" then go to "Run Configurations..." locate the "Android Application" node in the tree at the left, then select your project and go to the "Target" tab on the right side of the window look down for the "Additional Emulator Command Line Options" field (sometimes you'll need to make the window larger) and finally paste "-partition-size 1024" there. Click Apply and then Run to use your emulator. 2- Go to Eclipse's Preferences, then Select “Launch” Add “-partition-size 1024” on the “Default emulator option” field, then click “Apply” and use your emulator as usual.

  Want to see more details about this problem click these links 

 1.http://stackoverflow.com/questions/6788996/installation-error-install-failed-insufficient-storage-during-runing-emulator  

2.http://stackoverflow.com/questions/4709137/solution-android-install-failed-insufficient-storage-error

3. http://stackoverflow.com/questions/5359766/i-have-enough-memory-but-am-getting-the-install-failed-insufficient-storage-erro 

4. http://stackoverflow.com/questions/2239330/how-to-increase-storage-for-android-emulator-install-failed-insufficient-stora 

5. http://groups.google.com/group/android-developers/browse_thread/thread/920db96745cff96f?pli=1   

Sources;- http://google-androidlovers.blogspot.com/

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Setting up the Android Studio Proxy

To support running Android Studio behind a firewall, set the proxy settings for the Android Studio IDE and the SDK Manager. Use the Android Studio IDE HTTP Proxy settings page to set the HTTP proxy settings for Android Studio. The SDK Manager has a separate HTTP Proxy settings page.

Android Studio supports HTTP proxy settings so you can run Android Studio behind a firewall or secure network. To set the HTTP proxy settings in Android Studio:

1. From the main menu choose File > Settings > Appearance & Behavior -- System Settings -- HTTP Proxy.
2. In Android Studio, open the IDE Settings dialog.
   • On Windows and Linux, choose File > Settings > IDE Setting -- HTTP Proxy.
   • On Mac, choose Android Studio > Preferences > IDE Setting -- HTTP Proxy.
   The HTTP Proxy page appears.
3. Select auto-detection to use an auto-configuration URL to configure the proxy settings or manual to enter each of the settings. For a detailed explanation of these settings, see HTTP Proxy.
4. Click Apply to enable the proxy settings.

Android Plugin for Gradle HTTP proxy settings

For application-specific HTTP proxy settings, set the proxy settings in the build.gradle file as required for each application module.

apply plugin: 'com.android.application'

android {
    ...

    defaultConfig {
        ...
        systemProp.http.proxyHost=proxy.company.com
        systemProp.http.proxyPort=443
        systemProp.http.proxyUser=userid
        systemProp.http.proxyPassword=password
        systemProp.http.auth.ntlm.domain=domain
    }
    ...
}

Credit: Official Android Website

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Code formatting shortcut in Android studio

There are some difference code format between eclipse and android studio.

In eclipse :
Win/Linux - : Ctrl+Shift+F
Mac-: Command + Shift + F


In Android Studio:
Win/Linux - : Ctrl + Alt + L
Mac:- Option + Command + L

Happy Coding!!!

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How to Change Android SDK Path in Android Studio

From Android Studio 1.0.1 and above

Go to

1. File -> project Structure into Project Structure
2. Left -> SDK Location
3. SDK location select Android SDK location (old version use Press +, add another sdk)

Or

1. Close current Project (File->Close project)

       You'll get a Welcome to Android Studio Dialog. In that:

2. Click on Configure -> Project Defaults -> Project Structure

3. Click on SDK Location in the left column

4. Put the path to the Android SDK in "Android SDK location" field.

     (Example SDK location: C:\android-sdk; I have sub-folders like add-ons, platforms etc under C:\android-sdk)

5. Click OK to save changes

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Java Functional Programming: Understanding Predicates

As java 8 introduces the predicate functions, but we may wonder where to use those true/false returning function in our daily programming life. The answer is we can use this in the following scenario:
1. when we have to evaluate the objects from the same class which will result in the true or false.
2. to filter the objects by using some of its variables etc.

lets hack Predicate with some examples:

A. Examining if the object is the intance of the particular class or not: 

/** * Created by yubraj on 1/26/16. */

public class MyClass {
    Predicate<MyClass> predicate1 = (MyClass myclass) -> this.equals(myclass);
    Predicate<MyClass> predicate2 =  this::equals;
    String text1 = "yubraj", text2 = "pokharel";
    public MyClass(String text1, String text2) {
        this.text1 = text1;        this.text2 = text2;    }

    @Override    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        MyClass myClass = (MyClass) o;
        if (!text1.equals(myClass.text1)) return false;
        return text2.equals(myClass.text2);
    }

    @Override    public int hashCode() {
        int result = text1.hashCode();    
        result = 31 * result + text2.hashCode();
        return result;    }

    public void myMethod(MyClass cl){
        System.out.println("Intance equals : " + predicate2.test(cl));    }

    public static void main(String[] args) {
        MyClass mc = new MyClass("sudhan", "pokharel");
        MyClass mc2 = new MyClass("yubraj", "pokharel");
        mc.myMethod(mc);
        System.out.println("-----------------------------------");
        mc2.myMethod(mc2);
    }

}

Output:
true
true
//because both are the intance of the similar object.



B. Filtering the objects

for male employee who are older then 21 years

lets add this in the Employee Class

public static Predicate<Employee> isAdultMale() {

    return p -> p.getAge() > 21 && p.getGender().equalsIgnoreCase("M");

}

then we can access all the employee who are Male and also more then 21 years by passing method as the variable eg:

public static void main(String[] args){

        Employee e1 = new Employee(1,23,"M","Rick","Beethovan");

        Employee e2 = new Employee(2,13,"F","Martina","Hengis");

        Employee e3 = new Employee(3,43,"M","Ricky","Martin");

        Employee e4 = new Employee(4,26,"M","Jon","Lowman");

        Employee e5 = new Employee(5,19,"F","Cristine","Maria");

        Employee e6 = new Employee(6,15,"M","David","Feezor");

        Employee e7 = new Employee(7,68,"F","Melissa","Roy");

        Employee e8 = new Employee(8,79,"M","Alex","Gussin");

        Employee e9 = new Employee(9,15,"F","Neetu","Singh");

        Employee e10 = new Employee(10,45,"M","Naveen","Jain");

         

        List<Employee> employees = new ArrayList<Employee>();

        employees.addAll(Arrays.asList(new Employee[]{e1,e2,e3,e4,e5,e6,e7,e8,e9,e10}));

                

        System.out.println(filterEmployees(employees, isAdultMale()));

}

Happy Coding :)

References: howtodoinjava, oracle

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