Error message 'java.net.SocketException: socke

2020-01-23 04:47发布

问题:

I get the error message

java.net.SocketException: socket failed: EACCES (Permission denied)

when I try to apply the code below. This is the function I call and gives me this exception.

public void run() {
    // TODO Auto-generated method stub
    URL myurl = null;

    try {
        myurl = new URL("http://10.0.2.2/list.JSON");
    }
    catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    try {
        URLConnection myconn = myurl.openConnection();
        InputStream in = new BufferedInputStream(myconn.getInputStream());
        InputStreamReader reader = new InputStreamReader(in);
        BufferedReader br = new BufferedReader(reader);
        String line;
        StringBuilder sb = new StringBuilder();
        while ((line=br.readLine()) != null)
        {
            sb.append(line);
            //Toast.makeText(getApplicationContext(), "I enter here", Toast.LENGTH_LONG).show();
        }
        jsoncode = sb.toString();
    }
    catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    threading = true;
    super.run();
}

LogCat:

06-30 11:33:21.457: W/System.err(619): java.net.SocketException: socket failed: EACCES (Permission denied)
06-30 11:33:21.467: W/System.err(619):     at libcore.io.IoBridge.socket(IoBridge.java:573)
06-30 11:33:21.467: W/System.err(619):     at java.net.PlainSocketImpl.create(PlainSocketImpl.java:201)
06-30 11:33:21.479: W/System.err(619):     at java.net.Socket.checkOpenAndCreate(Socket.java:663)
06-30 11:33:21.479: W/System.err(619):     at java.net.Socket.connect(Socket.java:807)
06-30 11:33:21.479: W/System.err(619):     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:77)
06-30 11:33:21.479: W/System.err(619):     at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
06-30 11:33:21.479: W/System.err(619):     at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:351)
06-30 11:33:21.479: W/System.err(619):     at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:86)
06-30 11:33:21.479: W/System.err(619):     at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
06-30 11:33:21.487: W/System.err(619):     at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:308)
06-30 11:33:21.487: W/System.err(619):     at libcore.net.http.HttpEngine.connect(HttpEngine.java:303)
06-30 11:33:21.497: W/System.err(619):     at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:282)
06-30 11:33:21.497: W/System.err(619):     at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:232)
06-30 11:33:21.497: W/System.err(619):     at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:273)
06-30 11:33:21.497: W/System.err(619):     at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:168)
06-30 11:33:21.497: W/System.err(619):     at com.apk.PItestActivity$connection.run(PItestActivity.java:190)
06-30 11:33:21.507: W/System.err(619): Caused by: libcore.io.ErrnoException: socket failed: EACCES (Permission denied)
06-30 11:33:21.517: W/System.err(619):     at libcore.io.Posix.socket(Native Method)
06-30 11:33:21.517: W/System.err(619):     at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:169)
06-30 11:33:21.527: W/System.err(619):     at libcore.io.IoBridge.socket(IoBridge.java:558)
06-30 11:33:21.527: W/System.err(619):     ... 15 more

And this is my manifest file:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.apk"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="14" />
    <permission android:name="android.permission.INTERNET"></permission>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".PItestActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name="addfriend"></activity>
        <activity android:name="updateDetails"></activity>
        <activity android:name="Details"></activity>
        <activity android:name="updateimage"></activity>
    </application>
</manifest>

How can I fix this problem?

回答1:

Try with,

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

instead of,

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


回答2:

Try this:

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

And your activity namesmust be like this with capital letters:

<activity android:name=".Addfriend"/>
    <activity android:name=".UpdateDetails"/>
    <activity android:name=".Details"/>
    <activity android:name=".Updateimage"/>


回答3:

try it.

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


回答4:

Try moving <uses-permission> outside the <application> tag.



回答5:

Uninstalling the app on device and then reinstalling fixed it for me.

Tried all the other options, nothing. Finally found this post. This is after adding permission (below) and cleaning build.

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


回答6:

Add those source code to your Java file as below:

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectDiskReads().detectDiskWrites().detectNetwork().penaltyLog().build());


回答7:

You may need to do AndroidStudio - Build - Clean

If you updated manifest through the filesystem or Git it won't pick up the changes.



标签: android json