java - android套接字异常权限被拒绝

Question

我在这里尝试遵循此代码示例:http://simena86.github.io/blog/2013/04/30/logging-accelerometer-from-android-to-pc/

我收到一个套接字错误:虽然权限被拒绝异常。

这是我的 list 文件:

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

        <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />

    <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"/>

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

教程相关部分:

package noe.rart;

import java.io.BufferedWriter;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;

import android.app.Activity;
import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Socket_test2Activity extends Activity {

    public int PORT = 15000;
    private Button connectPhones;
    private String serverIpAddress = "10.0.0.5";
    private boolean connected = false;
    TextView text;
    EditText port;
    EditText ipAdr;
    private float x,y,z;
    private SensorManager sensorManager;
    private Sensor sensor;
    boolean acc_disp = false;
    boolean isStreaming = false;
    PrintWriter out;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        connectPhones = (Button)findViewById(R.id.send);
        connectPhones.setOnClickListener(connectListener);
        text=(TextView)findViewById(R.id.textin);
        port=(EditText)findViewById(R.id.port);
        ipAdr=(EditText)findViewById(R.id.ipadr);
        text.setText("Press send to stream acceleration measurement");
        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        sensor = sensorManager.getSensorList(Sensor.TYPE_ACCELEROMETER).get(0);
        port.setText("15000");
        ipAdr.setText(serverIpAddress);
        acc_disp =false;
    }

    private Button.OnClickListener connectListener = new Button.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (!connected) {
                if (!serverIpAddress.equals("")) {
                    connectPhones.setText("Stop Streaming");
                    Thread cThread = new Thread(new ClientThread());
                    cThread.start();
                }
            }
            else{
                connectPhones.setText("Start Streaming");
                connected=false;
                acc_disp=false;
            }
        }
    };

    public class ClientThread implements Runnable {
        Socket socket;
        public void run() {
            try {
                acc_disp=true;
                PORT = Integer.parseInt(port.getText().toString());
                serverIpAddress=ipAdr.getText().toString();
                InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
                //InetAddress serverAddr = InetAddress.getByName("TURBOBEAVER");
                socket = new Socket(serverAddr, PORT);
                connected = true;
                out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);
                while (connected) {
                    out.printf("%10.2f\n", x);
                    out.flush();
                    Thread.sleep(2);
                }
            }
            catch (Exception e) {

            }
            finally{
                try{
                    acc_disp=false;
                    connected=false;
                    connectPhones.setText("Start Streaming");
                    //out.close();
                    socket.close();
                }catch(Exception a){
                }
            }
        }
    };

   private void init_perif(){
        // smthing      
    }

    @Override
    protected void onResume() {
        super.onResume();
        sensorManager.registerListener(accelerationListener, sensor,
        SensorManager.SENSOR_DELAY_FASTEST);
    }

    @Override
    protected void onStop() {
        sensorManager.unregisterListener(accelerationListener);
        super.onStop();
    }

    private SensorEventListener accelerationListener = new SensorEventListener() {

        @Override
        public void onAccuracyChanged(Sensor sensor, int acc) {
        }
        @Override
        public void onSensorChanged(SensorEvent event) {
            x = event.values[0];
            y = event.values[1];
            z = event.values[2];
            refreshDisplay();
        }
    };

    private void refreshDisplay() {
        if(acc_disp == true){
            String output = String.format("X:%3.2f m/s^2  |  Y:%3.2f m/s^2  |   Z:%3.2f m/s^2", x, y, z);
            text.setText(output);
        }
    }
}

和 logcat:

11-10 01:44:07.125  31884-31884/com.example.accelerometerlogger E/Zygote﹕ MountEmulatedStorage()
11-10 01:44:07.125  31884-31884/com.example.accelerometerlogger E/Zygote﹕ v2
11-10 01:44:07.125  31884-31884/com.example.accelerometerlogger I/libpersona﹕ KNOX_SDCARD checking this for 10353
11-10 01:44:07.125  31884-31884/com.example.accelerometerlogger I/libpersona﹕ KNOX_SDCARD not a persona
11-10 01:44:07.145  31884-31884/com.example.accelerometerlogger I/SELinux﹕ Function: selinux_compare_spd_ram, SPD-policy is existed. and_ver=SEPF_SM-G900V_5.0 ver=27
11-10 01:44:07.145  31884-31884/com.example.accelerometerlogger I/SELinux﹕ Function: selinux_compare_spd_ram , priority [1] , priority version is VE=SEPF_SM-G900V_5.0_0027
11-10 01:44:07.145  31884-31884/com.example.accelerometerlogger E/SELinux﹕ [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL
11-10 01:44:07.145  31884-31884/com.example.accelerometerlogger I/art﹕ Late-enabling -Xcheck:jni
11-10 01:44:07.175  31884-31884/com.example.accelerometerlogger D/TimaKeyStoreProvider﹕ TimaSignature is unavailable
11-10 01:44:07.175  31884-31884/com.example.accelerometerlogger D/ActivityThread﹕ Added TimaKeyStore provider
11-10 01:44:07.215  31884-31884/com.example.accelerometerlogger D/ResourcesManager﹕ creating new AssetManager and set to /data/app/com.example.accelerometerlogger-2/base.apk
11-10 01:44:07.395  31884-31884/com.example.accelerometerlogger D/Activity﹕ performCreate Call secproduct feature valuefalse
11-10 01:44:07.395  31884-31884/com.example.accelerometerlogger D/Activity﹕ performCreate Call debug elastic valuetrue
11-10 01:44:07.415  31884-31884/com.example.accelerometerlogger D/SensorManager﹕ registerListener :: 0, MPU6500 Acceleration Sensor, 0, 0,
11-10 01:44:07.445  31884-31921/com.example.accelerometerlogger D/OpenGLRenderer﹕ Render dirty regions requested: true
11-10 01:44:07.565  31884-31921/com.example.accelerometerlogger I/Adreno-EGL﹕ <qeglDrvAPI_eglInitialize:410>: EGL 1.4 QUALCOMM build:  ()
    OpenGL ES Shader Compiler Version: E031.25.01.03
    Build Date: 03/03/15 Tue
    Local Branch: LA.BF.1.1_RB1_20150108_025_1077123_1158499
    Remote Branch:
    Local Patches:
    Reconstruct Branch:
11-10 01:44:07.565  31884-31921/com.example.accelerometerlogger I/OpenGLRenderer﹕ Initialized EGL, version 1.4
11-10 01:44:07.605  31884-31921/com.example.accelerometerlogger I/OpenGLRenderer﹕ HWUI protection enabled for context ,  &this =0xb3a22088 ,&mEglDisplay = 1 , &mEglConfig = 8
11-10 01:44:07.615  31884-31921/com.example.accelerometerlogger D/OpenGLRenderer﹕ Enabling debug mode 0
11-10 01:44:07.755  31884-31884/com.example.accelerometerlogger I/Timeline﹕ Timeline: Activity_idle id: android.os.BinderProxy@d099f83 time:608961596
11-10 01:44:18.875  31884-31884/com.example.accelerometerlogger D/ViewRootImpl﹕ ViewPostImeInputStage ACTION_DOWN
11-10 01:44:19.055  31884-31884/com.example.accelerometerlogger I/System.out﹕ Starting Stream
11-10 01:44:19.065  31884-32125/com.example.accelerometerlogger I/System.out﹕ Starting client thread
11-10 01:44:19.075  31884-32125/com.example.accelerometerlogger W/System.err﹕ java.net.ConnectException: failed to connect to /98.157.211.152 (port 6881): connect failed: ECONNREFUSED (Connection refused)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at libcore.io.IoBridge.connect(IoBridge.java:124)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:163)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at java.net.Socket.startupSocket(Socket.java:590)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at java.net.Socket.<init>(Socket.java:226)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at com.example.accelerometerlogger.MainActivity$ClientThread.run(MainActivity.java:92)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at java.lang.Thread.run(Thread.java:818)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ Caused by: android.system.ErrnoException: connect failed: ECONNREFUSED (Connection refused)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at libcore.io.Posix.connect(Native Method)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:111)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at libcore.io.IoBridge.connectErrno(IoBridge.java:137)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ at libcore.io.IoBridge.connect(IoBridge.java:122)
11-10 01:44:19.085  31884-32125/com.example.accelerometerlogger W/System.err﹕ ... 6 more

Answer 1

添加权限后，我显然还需要关闭/打开 Android Studio 并重新打开项目，或者只是重新打开项目。