尝试连接到时获取SSLHandshakeExceptionhttps://maps.googleapis.com在and

Question

我想从google places api获取数据，但我得到了SSLHandshakeException。我可以在浏览器中运行相同的URL并得到结果。

但在设备上测试，android 5.0.2给出了错误。我的应用程序的minSDK版本是16，TargetSDK版本是23，在Android Studio 1.5上开发。代码为：

HttpsURLConnection urlConnection = null;
Uri builtUri = Uri.parse(PLACE_BASE_URL).buildUpon()
                    .appendQueryParameter(LOCATION, location)
                    .appendQueryParameter(RADIUS, radius)
                    .appendQueryParameter(TYPE_PARAM, type)
                    .appendQueryParameter(SENSOR, Boolean.toString(true))
                    .appendQueryParameter(API_KEY, "AIzadfdajl_XXXXX-your_key")       
                    .build();
URL url = new URL(builtUri.toString());
urlConnection = (HttpsURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();

"urlConnection.connect（）"行给出javax.net.ssl.SSLHandshakeException错误。完整错误如下：

    javax.net.ssl.SSLHandshakeException: Handshake failed
at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:374)
at com.android.okhttp.Connection.upgradeToTls(Connection.java:201)
at com.android.okhttp.Connection.connect(Connection.java:155)
at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:276)
at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:211)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:373)
at com.android.okhttp.internal.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:106)
at com.android.okhttp.internal.http.DelegatingHttpsURLConnection.connect(DelegatingHttpsURLConnection.java:89)
at com.android.okhttp.internal.http.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:25)
at info.placequest.android.GetPlaces.GetPlacesTask.doInBackground(GetPlacesTask.java:91)
at info.placequest.android.GetPlaces.GetPlacesTask.doInBackground(GetPlacesTask.java:26)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x5585123b00: Failure in SSL library, usually a protocol error
error:1407743E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert inappropriate fallback (external/openssl/ssl/s23_clnt.c:765 0x7fa8990ca0:0x00000000)
at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
at com.android.org.conscrypt.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:302)
... 16 more

Answer 1

我没有使用"HttpsURLConnection"，而是使用了netcipher。使用方法如下：在您的Build.gradle，dependencies块中，

implementation 'info.guardianproject.netcipher:netcipher:2.1.0' 

然后在.java文件中访问URL，如下所示：

urlConnection = NetCipher.getHttpsURLConnection(requestUrl);
urlConnection.setRequestProperty("Content-Type", "application/json");
urlConnection.setRequestProperty("Accept", "application/json");
urlConnection.setRequestMethod("GET");
int statusCode = urlConnection.getResponseCode();

接下来，您可以检查statusCode是否为200，然后将输入流读取为String:

    if (statusCode == 200) {
        InputStream inputStream = urlConnection.getInputStream();
    }

SSLHandshakeException不会出现，并且代码正常工作。PS：很抱歉延迟回答！