XMPP Smack 4.1.0 rc1 ACCES（权限被拒绝）在 Android 上

Question

我正在尝试使用来自https://github.com/igniterealtime/Smack 的 Smack 4.1.0 rc1 进行 XMPP 连接 我按照本指南 https://github.com/igniterealtime/Smack/wiki/Smack-4.1-Readme-and-Upgrade-Guide 导入 Gradle。

源代码：

package com.example.xmpp_app;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;

import org.jivesoftware.smack.AbstractXMPPConnection;
import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.tcp.XMPPTCPConnection;
import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;

import java.io.IOException;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Create the configuration for this new connection
        XMPPTCPConnectionConfiguration.Builder configBuilder = XMPPTCPConnectionConfiguration.builder();
        configBuilder.setUsernameAndPassword("test@example.com", "password123");
        configBuilder.setResource("test");
        configBuilder.setServiceName("127.0.0.1");

        AbstractXMPPConnection connection = new XMPPTCPConnection(configBuilder.build());
        // Connect to the server
        try {
            connection.connect();
        } catch (SmackException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (XMPPException e) {
            e.printStackTrace();
        }
        // Log into the server
        try {
            connection.login();
        } catch (XMPPException e) {
            e.printStackTrace();
        } catch (SmackException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // Disconnect from the server
        connection.disconnect();
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

分级：

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
        maven {
            url 'https://oss.sonatype.org/content/repositories/snapshots'
        }
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

构建等级：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "com.example.xmpp_app"
        minSdkVersion 15
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile "org.igniterealtime.smack:smack-android:4.1.0-rc1"
    // Optional for XMPPTCPConnection
    compile "org.igniterealtime.smack:smack-tcp:4.1.0-rc1"
    // Optional for XMPP-IM (RFC 6121) support (Roster, Threaded Chats, …)
    compile "org.igniterealtime.smack:smack-im:4.1.0-rc1"
    // Optional for XMPP extensions support
    compile "org.igniterealtime.smack:smack-extensions:4.1.0-rc1"
}

错误：

我找到了一些如何请求互联网许可的指南，但我无法测试它，因为我现在不在家，我如何使用我的本地主机尝试它？当我尝试这个时，它说

Exception while resovling SRV records for 127.0.0.1. Consider adding '_xmpp-(server|client)._tcp' DNS SRV Records android.os.NetworkOnMainThreadException 

即使它仍然显示与前一个相同的错误消息

03-21 14:57:30.332 1176-1176/com.example.xmpp_app W/System.err﹕ org.jivesoftware.smack.SmackException$ConnectionException: The following addresses failed: '127.0.0.1:5222' failed because java.net.SocketException: socket failed: EACCES (Permission denied) 03-21 14:57:30.372 1176-1176/com.example.xmpp_app W/System.err﹕ at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectUsingConfiguration(XMPPTCPCo‌​nnection.java:574

有人可以帮我解决这个问题吗？我只是想检查一下连接是否正常。

注意：我已经加了：<uses-permission android:name="android.permission.INTERNET" /> 在我的安卓清单上。

Answer 1

您的问题是您在主线程中发出网络请求 这个网络调用会抛出一个android.os.NetworkOnMainThreadException 您必须使用 AsyncTask 或 java 中的简单线程创建一个单独的线程，然后调用 smack 来连接、登录并执行您对服务器的任何操作。

http://developer.android.com/reference/android/os/AsyncTask.html

Answer 2

你用的是安卓模拟器吗？如果你是 android 模拟器，你应该使用 10.0.2.2 作为 localhost。 127.0.0.1 是它自己的环回接口。 同时添加 INTERNET 权限

请看http://developer.android.com/tools/devices/emulator.html

Answer 3

连接必须在后台线程中，像这样。

 AsyncTask.execute(new Runnable() {
            @Override
            public void run() {
                try {
                    getMainActivity().connection.connect().login();
                } catch (XMPPException e) {
                    e.printStackTrace();
                } catch (SmackException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }

                Log.d(TAG, "onCreate: isConnected " + getMainActivity().connection.isConnected());
                Log.d(TAG, "onCreate: isAuthenticated " + getMainActivity().connection.isAuthenticated());
            }
        });