1、信任所有的证书：

    Android平台上经常有使用https的需求，对于https服务器使用的根证书是受信任的证书的话，实现https是非常简单的，直接用httpclient库就行了，与使用http几乎没有区别。但是在大多数情况下，服务器所使用的根证书是自签名的，或者签名机构不在设备的信任证书列表中，这样使用httpclient进行https连接就会失败。解决这个问题的办法有两种，一是在发起https连接之前将服务器证书加到httpclient的信任证书列表中，这个相对来说比较复杂一些，很容易出错；另一种办法是让httpclient信任所有的服务器证书，这种办法相对来说简单很多，但安全性则差一些，但在某些场合下有一定的应用场景。这一篇主要实现httpclient信任所有的服务器证书。

      直接给出代码：

package com.example.zq.test3;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import cn.edu.zafu.bmobdemo.R;

/**
 * Created by stevenzhang on 2017/2/21 0021.
 */

public class HttpsTestActivity extends Activity {
    
    /** Called when the activity is first created. */
    
    private TextView text;
    public static final String TAG = "HttpsTestActivity";
    
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        text=(TextView)findViewById(R.id.textView1);
        GetHttps();
    }

    private void GetHttps(){
        final String https = "https://www.google.com.hk";//google可能访问不了，可以换一个https链接
        
        new Thread(new Runnable() {
            @Override
            public void run() {
                try{
                    SSLContext sc = SSLContext.getInstance("TLS");
                    sc.init(null, new TrustManager[]{new MyTrustManager()}, new SecureRandom());
                    HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
                    HttpsURLConnection.setDefaultHostnameVerifier(new MyHostnameVerifier());
                    HttpsURLConnection conn = (HttpsURLConnection)new URL(https).openConnection();
                    conn.setDoOutput(true);
                    conn.setDoInput(true);
                    conn.connect();
                    BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                    final StringBuffer sb = new StringBuffer();
                    String line;
                    while ((line = br.readLine()) != null)
                        sb.append(line);
                    
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            text.setText(sb.toString());
                        }
                    });
                 
                }catch(Exception e){
                    Log.e(TAG, e.toString());
                }
            }
        }).start();
        
//        runOnUiThread(new Runnable() {
//            @Override
//            public void run() {
//             
//            }
//        });
        
        
     
        
        
     
    }



    private class MyHostnameVerifier implements HostnameVerifier {
        @Override
        public boolean verify(String hostname, SSLSession session) {
            // TODO Auto-generated method stub  
            return true;
        }

    }

    private class MyTrustManager implements X509TrustManager {
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType)
                throws CertificateException {
            // TODO Auto-generated method stub    
        }
        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType)

                throws CertificateException {
            // TODO Auto-generated method stub      
        }
        @Override
        public X509Certificate[] getAcceptedIssuers() {
            // TODO Auto-generated method stub  
            return null;
        }

    }
}