How to call HTTPS webservices in android

For Example :

==> First call following method.

public static void trustAllHosts() {

        X509TrustManager easyTrustManager = new X509TrustManager() {

            public void checkClientTrusted(X509Certificate[] chain,
                    String authType) throws CertificateException {
                // Oh, I am easy!
            }

            public void checkServerTrusted(X509Certificate[] chain,
                    String authType) throws CertificateException {
                // Oh, I am easy!
            }

            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }

        };

        // Create a trust manager that does not validate certificate chains
        TrustManager[] trustAllCerts = new TrustManager[] { easyTrustManager };

        // Install the all-trusting trust manager
        try {
            SSLContext sc = SSLContext.getInstance("TLS");

            sc.init(null, trustAllCerts, new java.security.SecureRandom());

            HttpsURLConnection
                    .setDefaultSSLSocketFactory(sc.getSocketFactory());

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

====> After this


For calling HTTPS webservices you need to create Custom HttpClient instead of using DefaultHttpClient.


HttpClient _httpclient = Utils.getNewHttpClient();

Following is getNewHttpClient() method :

public static HttpClient getNewHttpClient() {

try {

KeyStore trustStore = KeyStore.getInstance(KeyStore

.getDefaultType());

trustStore.load(null, null);

SSLSocketFactory sf = new MySSLSocketFactory(trustStore);

sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

HttpParams params = new BasicHttpParams();

HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);

HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);

SchemeRegistry registry = new SchemeRegistry();

registry.register(new Scheme("http", PlainSocketFactory

.getSocketFactory(), 80));

registry.register(new Scheme("https", sf, 443));

ClientConnectionManager ccm = new ThreadSafeClientConnManager(

params, registry);

return new DefaultHttpClient(ccm, params);

} catch (Exception e) {

return new DefaultHttpClient();

}

}

Here we have use custom MySSLSocketFactory class, which is following.

Create new class MySSLSocketFactory.java copy following code and paste.

public class MySSLSocketFactory extends SSLSocketFactory {

SSLContext sslContext = SSLContext.getInstance("TLS");

public MySSLSocketFactory(KeyStore truststore)

throws NoSuchAlgorithmException, KeyManagementException,

KeyStoreException, UnrecoverableKeyException {

super(truststore);

TrustManager tm = new X509TrustManager() {

public void checkClientTrusted(X509Certificate[] chain,

String authType) throws CertificateException {

}

public void checkServerTrusted(X509Certificate[] chain,

String authType) throws CertificateException {

}

public X509Certificate[] getAcceptedIssuers() {

return null;

}

};

sslContext.init(null, new TrustManager[] { tm }, null);

}

@Override

public Socket createSocket(Socket socket, String host, int port,

boolean autoClose) throws IOException, UnknownHostException {

return sslContext.getSocketFactory().createSocket(socket, host, port,

autoClose);

}

@Override

public Socket createSocket() throws IOException {

return sslContext.getSocketFactory().createSocket();

}

}

Now done :) You can parse your xml now. 

Using multiple text colors in Android's textview

I had faced on issue in my past project. How to set multiple colors in single textview ? For that I have solve it using following way.

    productprice.setText(Html.fromHtml("Price" + ": "
                    + "<font color=\"#990000\">"

                    + cartList.get(position).ProductPrice + " " + "</font>"));


productprice is TextView, set   android:textColor as default color for Textview.


Hope it helps you also.

What does “xmlns” in Android XML mean?

Generally we write following line in android xml file.

xmlns:android="http://schemas.android.com/apk/res/android"

 It defines XML Namespace.

The Namespace Prefix is "android" and the Namespace URI is "http://schemas.android.com/apk/res/android"

Basically, every element (or attribute) in xml belongs to a namespace, a way of "qualifying" the name of the element.

Example :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

Select + copy text in a TextView?

 Generally we can copy / paste the value from EditText by long click. It is in-build functionality of Android. Now lets say you have requirement same thing in TextView. Then you have to use registerForContextMenu.


 Like  registerForContextMenu(yourtextview);

 and your TextView will be registered for receiving context menu events.

Then You have to override onCreateContextMenu() method. Following is entire code.


 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        txtcopytext = (TextView) findViewById(R.id.txtcopytext);
        registerForContextMenu(txtcopytext);

    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        // user has long pressed your TextView
        menu.add(0, v.getId(), 0,
                "Copy");

        // cast the received View to TextView so that you can get its text
        TextView yourTextView = (TextView) v;

        // place your TextView's text in clipboard
        ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
        clipboard.setText(yourTextView.getText());
    }

 

How to set background color with borders to perticular View dynamically in android

Hello, Today I will explain you how to set background color + borders to particular view in android.

Let's say You have one button and you have to set background color RED with border color gray, for that you have to use GradientDrawable.

 GradientDrawable drawable = new GradientDrawable();
  drawable.setShape(GradientDrawable.RECTANGLE);
  drawable.setCornerRadius(10);
  drawable.setStroke(2, Color.GRAY);
  drawable.setColor(Color.RED)); 

 btnBlackColor.setBackgroundDrawable(drawable);