Remove click delay on mobile browser

mobileClick.js - jQuery plugin that create self event 'mobileclick', not invoke 'click' event, not interfering in propagate stack of events. You need just bind 'mobileclick' event to you html element:

$('you-element-selector').bind('mobileclick', function() {
    alert('test me');
})
// or
$(document).on('mobileclick', 'you-element-selector', function() {
    alert('test me');
})

github project: mobileClick

Objective C: UITableView: Detect which section header on top

static NSInteger currentTopVisibleSection = -1;

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    NSIndexPath *topCellPath = [[tableView indexPathsForVisibleRows] objectAtIndex:0];
    if (currentTopVisibleSection != topCellPath.section) {
        currentTopVisibleSection = topCellPath.section;
        NSLog(@"current section on top is %d", currentTopVisibleSection);
    }

    NSString *header = [NSString stringWithFormat:@"Section %d", section];
    return header;
}

iOS PhoneGap / Cordova – Splash screen control

In Cordova from 1.6 version exist “AutoHideSplashScreen” attribute. If you need show splash screen until you get onDeviceReady event - change value to NO.

function onBodyLoad()
{  
 document.addEventListener("deviceready", onDeviceReady, false);
}
function onDeviceReady()
{
 navigator.splashscreen.hide();
}

But if you have Cordova version until 1.8 it doesn't work. Use instead navigator object:

 cordova.exec(null, null, "SplashScreen", "hide", []);
 cordova.exec(null, null, "SplashScreen", "show", []);

But for iPad you need add to project two new images:

 Default-Portrait.png
 Default-Landscape.png

Mobile Web: Set cursor position to the end of a text field.

If you want to place the cursor at the end of the text box, simply add the following code :

 
elm.addEventListener("focus", function() {this.value=this.value}, false);
 
 

But if your code is designed for mobile browsers, it will not work.
Use this code:

 
elm.addEventListener("focus", function(){
             if(this.setSelectionRange) {
           var _this = this;
           setTimeout(function(){
                                    _this.setSelectionRange(9999, 9999);
                                }, 0);
             } else
                 this.focus();
   }, false);
 
 

Why do you want to do this?
If your site has the direction="RTL", then after the text field gets focus, the cursor is placed not at the end of the field and in the beginning.
So you can't add text to the end and erase text by backspace.

Objective C: UITextField controlling background image/color

If you set

UITextField *tf = [[UITextField alloc] init];
tf.borderStyle = UITextBorderStyleRoundedRect;

you can't control background of text field. To controlling background you need

#import "QuartzCore/QuartzCore.h"
...

UITextField *tf = [[UITextField alloc] init];
tf.borderStyle = UITextBorderStyleDefault;
tf.background = [UIImage imageNamed:@"bg_000000_20.png"];
tf.layer.cornerRadius = 5.0;
tf.layer.masksToBounds = YES;

// for vertical align
tf.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

// for border
tf.layer.borderWidth = 1.0;
tf.layer.borderColor = [[UIColor darkGrayColor] CGColor];

// for left padding
tf.leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 20)];
tf.leftViewMode = UITextFieldViewModeAlways;

Java: Read key from Windows Registry.

After create new windows registry in cmd by:

reg add HKLM\SOFTWARE\Policies\MyApplication\AES /v SecurityKey /d 12345678901234567890123456789012

need read it from java

import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;

public class WindowsReqistry {

    /**
     * 
     * @param location path in the registry
     * @param key registry key
     * @return registry value or null if not found
     */
    public static final String readRegistry(String location, String key){
        try {
            // Run reg query, then read output with StreamReader (internal class)
            Process process = Runtime.getRuntime().exec("reg query " + 
                    '"'+ location + "\" /v " + key);

            StreamReader reader = new StreamReader(process.getInputStream());
            reader.start();
            process.waitFor();
            reader.join();

            // Parse out the value
            String[] parsed = reader.getResult().split("\\s+");
            if (parsed.length > 1) {
                return parsed[parsed.length-1];
            }
        } catch (Exception e) {}

        return null;
    }

    static class StreamReader extends Thread {
        private InputStream is;
        private StringWriter sw= new StringWriter();

        public StreamReader(InputStream is) {
            this.is = is;
        }

        public void run() {
            try {
                int c;
                while ((c = is.read()) != -1)
                    sw.write(c);
            } catch (IOException e) { 
            }
        }

        public String getResult() {
            return sw.toString();
        }
    }
    public static void main(String[] args) {

        // Sample usage
        String value = WindowsReqistry.readRegistry("HKLM\\SOFTWARE\\Policies\\MyApplication\\AES", "SecurityKey");
        System.out.println(value);
    }
}

Android: Import SSL certificate and use it to SSL connection

1. First of all you need get SSL certificate. You can obtain certificate (file with .cer extention) from the chain included in the endpoint certificate or from the official site of the issuer (in the Base64 encoded X.509 format).
   
   Or if you have this certificate installed on you local computer you can obtain it by run "mmc" (Microsoft Management Console) from command line ("Prompt" or "Run"). If you don't have Certificate snap-in go to  File -> Add/Remove Snap-in... -> Select from available snap-ins "Certificates" -> Add to Selected snap-ins -> Ok.
   
   Find certificate what do you need -> Right click -> All Tasks -> Export -> Select Base-64 encoded X.509 (.CER) -> Save into my_certificate.cer in my_certificate_path place.
   
   Content of this file look like:

   -----BEGIN CERTIFICATE-----
   MIIEIDCCAwigAwIBAgIQNE7VVyDV7exJ9C/ON9srbTANBgkqhkiG9w0B...
   -----END CERTIFICATE-----
   

2. For create the keystore download latest release of Bouncy Castle provider (bcprov-jdkxx-xxx.jar) and store it in provider_path place. You must have JRE installation for invoke keytool (located under bin folder). You may add path to keytool into CLASSPATH environment variable or use absolute path.
3. Execute this command for create mykeystore.bks (don't use upper case and "_" for name):

   D:/PROGRA~1/Java/jre7/bin/keytool -importcert -v -trustcacerts -file "my_certificate_pathmy_certificate.cer" -alias myAlias -keystore "my_keystore_path/mykeystore.bks" -provider org.bouncycastle.jce.provider.BouncyCastleProvider -providerpath "provider_path/bcprov-jdkxx-xxx.jar" -storetype BKS -storepass "my_password"
   

4. You may verify if the certificate was imported correctly

   D:/PROGRA~1/Java/jre7/bin/keytool -list -keystore "my_keystore_path/mykeystore.bks" -provider org.bouncycastle.jce.provider.BouncyCastleProvider -providerpath "provider_path/bcprov-jdkxx-xxx.jar" -storetype BKS -storepass "my_password"
   

5. Paste you mykeystore.bks as a raw resource under res/raw (this generate R.raw.mykeystore resource)
6. Create a custom HttpClient to use you SSL certificate for HTTPS connection:

   import java.io.InputStream;
   import java.security.KeyStore;
   
   import org.apache.http.conn.ClientConnectionManager;
   import org.apache.http.conn.scheme.PlainSocketFactory;
   import org.apache.http.conn.scheme.Scheme;
   import org.apache.http.conn.scheme.SchemeRegistry;
   import org.apache.http.conn.ssl.SSLSocketFactory;
   import org.apache.http.impl.client.DefaultHttpClient;
   import org.apache.http.impl.conn.SingleClientConnManager;
   
   import android.content.Context;
   
   public class MyHttpsClient extends DefaultHttpClient {
     
       final Context context;
    
       public MyHttpsClient(Context context) {
           this.context = context;
       }
    
       @Override
       protected ClientConnectionManager createClientConnectionManager() {
           SchemeRegistry registry = new SchemeRegistry();
           registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
           // Register for port 443 our SSLSocketFactory with our keystore
           // to the ConnectionManager
           registry.register(new Scheme("https", newSslSocketFactory(), 443));
           return new SingleClientConnManager(getParams(), registry);
       }
    
       private SSLSocketFactory newSslSocketFactory() {
           try {
               // Get an instance of the Bouncy Castle KeyStore format
               KeyStore trusted = KeyStore.getInstance("BKS");
               // Get the raw resource, which contains the keystore with
               // your trusted certificates (root and any intermediate certs)
               InputStream in = context.getResources().openRawResource(R.raw.mykeystore);
               try {
                   // Initialize the keystore with the provided trusted certificates
                   // Also provide the password of the keystore
                   trusted.load(in, "my_password".toCharArray());
               } finally {
                   in.close();
               }
               // Pass the keystore to the SSLSocketFactory. The factory is responsible
               // for the verification of the server certificate.
               SSLSocketFactory sf = new SSLSocketFactory(trusted);
               // Hostname verification from certificate
               // http://hc.apache.org/httpcomponents-client-ga/tutorial/html/connmgmt.html#d4e506
               sf.setHostnameVerifier(SSLSocketFactory.STRICT_HOSTNAME_VERIFIER);
               return sf;
           } catch (Exception e) {
               throw new AssertionError(e);
           }
       }
   }
   

7. Use you custom HttpClient:

   DefaultHttpClient client = new MyHttpsClient(getApplicationContext());