SSLContext ctx;
try {
    ctx = SSLContext.getInstance("TLSv1.2", "SunJSSE");
} catch (NoSuchAlgorithmException e) {
    try {
        ctx = SSLContext.getInstance("TLSv1", "SunJSSE");
    } catch (NoSuchAlgorithmException e1) {
        throw new AssertionError(e1);
    } catch (NoSuchProviderException e1) {
        throw new AssertionError(e1);
    }
} catch (NoSuchProviderException e) {
    throw new AssertionError(e);
}
MyTrustManager tm = new MyTrustManager(certHash);
ctx.init(null, new TrustManager[] {tm}, null);