What is Android(OS)?

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Android is a mobile operating system initially developed by Android Inc. Android is based upon a modified version of the Linux kernel.

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How to flash CWM Recovery to Samsung Galaxy SL( GT-I9003) using Odin

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** I Will Not responsible for any damage done with use of below mentioned methods. ** To flash the CWM recovery to your Samsung Galaxy SL you will require to following things in place: Odin  : you can download it from here.CWM Recovery image : you can download it from here. Thanks to XDA-developers. USB driver to connect your phone with computer. Install Samsung Kias so it will install the USB driver. Once you have downloaded above required items and installed the USB driver, reboot you phone to download mode. You can read how to reboot phone in download mode from here. Now connect the phone with USB cable to computer. 
Extract the Odin from the zip file that you have downloaded at some location on your computer and launch the Odin executable by double clicking it. Wait for Odin to detect your phone.You will be able to see it in yellow once detected on odin screen as shown below.
Click the PDA button to select the CWM recovery image. Once you have selected the recovery image, check the od…
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Exception handling with RestTemplate

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Spring framework offers RestTemplate for consuming RESTful services. Recently I used RestTemplate for consuming one of the third party RESTful service.

RestTemplate offers 'ResponseErrorHandler'; which you can extend to decide which are errors for you and how to handle those error. You can override hasError and handleError methods of ResponseErrorHandler.
In handleError you can throw customException if you want, as outlined in below code.

import org.springframework.http.HttpStatus; import org.springframework.http.client.ClientHttpResponse; import org.springframework.web.client.ResponseErrorHandler; import java.io.IOException; public class RestTemplateErrorHandler implements ResponseErrorHandler { @Override public void handleError(ClientHttpResponse response) throws IOException { throw new MyCustomException(response.getStatusText(), response.getStatusCode()); } @Override public boolean hasError(ClientHttpResponse response) throws IOException …
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Warning : Hardcoded string "str", should use @string resource

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Eclipse sometimes show a warning "Hardcoded string "str", should use @string resource.", while compiling an Android project. 
E.g: you might have used text view as below, and set the text directly in the layout xml



    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="This is text View" />

Resolution: Declare the string resource in strings.xml, present under values folder. Use the variable instead of the value that you have set.   


E.g.: for above text view declare string resource  as below :
 <string name="info">
This is text View </string>


and update the text view as below:

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/info" />
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