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//使用OkHttp进行SSL证书固定（SSL Pinning）
public class SSLPinningActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sslpinning);
    }
    //配置了两个CertificatePinner，分别用于验证特定的域名和相应的证书指纹。
    //对"www.baidu.com"和"www.sohu.com"两个域名的证书指纹。这意味着应用将只信任这些网站使用指定证书指纹的SSL证书。如果服务器返回的SSL证书不匹配指定的证书指纹，请求将会失败。
    public void okhttp3(View view) {
        CertificatePinner leafCertPinner = new CertificatePinner.Builder()
                .add("www.baidu.com", "sha256/M9Hz16jmJjXzPUkH8FUKG2GZLd/55sT6yCNiQgwfNtk=")
                .add("www.sohu.com", "sha256/MQ==")
                .build();
        CertificatePinner intermediateCertPinner = new CertificatePinner.Builder()
                .add("*.baidu.com", "sha256/IQBnNBEiFuhj+8x6X8XLgh01V9Ic5/V3IRQLNFFc7v4=")
                .build();
        OkHttpClient okHttpClient = new OkHttpClient.Builder()
                .certificatePinner(leafCertPinner)
                .certificatePinner(intermediateCertPinner)
                .build();
        Request.Builder builder = new Request.Builder();
        Request request = builder.get().url("https://www.baidu.com/").build();
        Call call = okHttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                e.printStackTrace();
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(SSLPinningActivity.this, "请求失败", Toast.LENGTH_LONG).show();
                    }
                });
            }
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                final int code = response.code();
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(SSLPinningActivity.this, "请求成功" + code, Toast.LENGTH_LONG).show();
                    }
                });
            }
        });
    }
}