Question

我已经在android中进行了注册活动。在单击按钮时，我用URL命中了一个api： task.execute（“ http://10.0.2.2:8080/TestWebService_war_exploded/hello”）;

我也使用了127.0.0.1而不是10.0.0.2 但这也不起作用。

单击按钮后，我在日志中遇到以下错误

W / System.err：java.net.UnknownServiceException：CLEARTEXT 网络安全策略不允许与10.0.2.2进行通信在okhttp3.internal.connection.RealConnection.connect（RealConnection.java:146）在okhttp3.internal.connection.StreamAllocation.findConnection（StreamAllocation.java:257）在okhttp3.internal.connection.StreamAllocation.findHealthyConnection（StreamAllocation.java:135）在okhttp3.internal.connection.StreamAllocation.newStream（StreamAllocation.java:114）在okhttp3.internal.connection.ConnectInterceptor.intercept（ConnectInterceptor.java:42） W / System.err：位于 okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:147）在okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:121）在okhttp3.internal.cache.CacheInterceptor.intercept（CacheInterceptor.java:93）在okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:147）在okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:121）在okhttp3.internal.http.BridgeInterceptor.intercept（BridgeInterceptor.java:93）在okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:147）在okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept（RetryAndFollowUpInterceptor.java:126）在okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:147）在okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:121） W / System.err：位于 okhttp3.RealCall.getResponseWithInterceptorChain（RealCall.java:200）在okhttp3.RealCall.execute（RealCall.java:77）在com.example.android.complaintbox_ritesltd.activity_SignUp $ DownloadWebPageTask.doInBackground（activity_SignUp.java:70）在com.example.android.complaintbox_ritesltd.activity_SignUp $ DownloadWebPageTask.doInBackground（activity_SignUp.java:60）在android.os.AsyncTask $ 2.call（AsyncTask.java:333）在java.util.concurrent.FutureTask.run（FutureTask.java:266）在android.os.AsyncTask $ SerialExecutor $ 1.run（AsyncTask.java:245）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1167）在java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:641） W / System.err：位于java.lang.Thread.run（Thread.java:764）

代码为：

private class DownloadWebPageTask extends AsyncTask<String, Void, String> {
    @Override
    protected String doInBackground(String... urls) {
        // we use the OkHttp library from https://github.com/square/okhttp
        OkHttpClient client = new OkHttpClient();
        try{
            Request request =
                    new Request.Builder()
                            .url(urls[0])
                            .build();
            Response response = client.newCall(request).execute();
            if (response.isSuccessful()) {
                return response.body().string();
            }
        }catch(Exception e){
            e.printStackTrace();
        }


        return "Download failed";
    }

    @Override
    protected void onPostExecute(String result) {
        textView.setText(result);
    }
}

// Triggered via a button in your layout
public void onClick(View view) {


    DownloadWebPageTask task = new DownloadWebPageTask();
    task.execute("http://10.0.2.2:8080/TestWebService_war_exploded/hello");

}

}

清单中的所有更改已经完成。

我正在尝试在模拟器上运行它。

Answer 1

在您的 AndroidManifest.xml

中

<?xml version="1.0" encoding="utf-8"?>
 <manifest ...>
<uses-permission android:name="android.permission.INTERNET" />
<application
    ...
    android:usesCleartextTraffic="true"
    ...
</application>
</manifest>

还要在 AndroidManifest.xml

中添加Internet权限

<uses-permission android:name="android.permission.INTERNET" />

单击按钮以点击api时出现以下错误

1 个答案: