天朝有很多独特的东西，今天要涉及到的是CMWAP与CMNET。
现在仍有许多Android手机用的是CMWAP连接网络的，如果只是简单滴使用URL.openConnection()开启一个HttpURLConnection，则会发现有一个UnknownHostException被抛出。唉...身为悲剧的程序员，就要开始解决这种bug了。
Sodino还发现一个现象，为什么自己的程序会崩掉，而Google浏览器就不会呢？与国产软件不同，国产软件身处天朝的软硬件环境下成长，可能会将代理IP（10.0.0.172）写进程序中，Sodino也确实反编译了几个程序后发现他们也是这样做来保持CMWAP下的正常联接。但是，Google浏览器可不是国人写的，那帮老外可不考虑天朝还有个CMWAP。那他们是如何保证网络的正常联接呢？一番鼓捣下，有了以下代码，可以在WIFI/CMWAP/CMNET/CTNET下正常访问网络，附带如何使用ping使用。
先上效果图：
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package lab.sodino.network;??
import java.io.IOException;??
import java.io.InputStream;??
import java.net.HttpURLConnection;??
import java.net.InetSocketAddress;??
import java.net.MalformedURLException;??
import java.net.URL;??
import java.net.UnknownHostException;??
import android.app.Activity;??
import android.content.Context;??
import android.net.ConnectivityManager;??
import android.net.NetworkInfo;??
import android.os.Bundle;??
import android.os.Handler;??
import android.os.Message;??
import android.util.Log;??
import android.view.View;??
import android.widget.Button;??
import android.widget.TextView;??
public class NetworkAct extends Activity {??
??? public static final int CLEAR_TEXT = 0;??
??? public static final int APPEND_TEXT = 1;??
??? private TextView txtInfo;??
??? private Button btnPing;??
??? private Button btnConnect;??
??? private Button btnClear;??
??? private BtnListener btnListener;??
??? private Handler handler = new Handler() {??
??????? public void handleMessage(Message msg) {??
??????????? switch (msg.what) {??
??????????? case APPEND_TEXT:??
??????????????? String content = msg.obj.toString();??
??????????????? txtInfo.setText("\n" + content);??
??????????????? break;??
??????????? case CLEAR_TEXT:??
??????????????? txtInfo.setText("");??
??????????????? break;??
??????????? }??
??????? }??
??? };??
??? public void onCreate(Bundle savedInstanceState) {??
??????? super.onCreate(savedInstanceState);??
??????? setContentView(R.layout.main);??
??????? btnListener = new BtnListener();??
??????? txtInfo = (TextView) findViewById(R.id.txtInfo);??
??????? btnPing = (Button) findViewById(R.id.btnPing);??
??????? btnPing.setOnClickListener(btnListener);??
??????? btnConnect = (Button) findViewById(R.id.btnConnect);??
??????? btnConnect.setOnClickListener(btnListener);??
??????? btnClear = (Button) findViewById(R.id.btnClear);??
??????? btnClear.setOnClickListener(btnListener);??
??? }??
??? /**?
???? * @param param?
???? *??????????? 指定的域名如(www.google.com)或IP地址。?
???? */?
??? private void doPing(final String param) {??
??????? new Thread() {??
??????????? public void run() {??
??????????????? String line = "";??
??????????????? InputStream is = null;??
??????????????? try {??
??????????????????? line = "\nping -c 1 " + param;??
??????????????????? // -c 1:表示ping的次数为1次。??
??????????????????? Process p = Runtime.getRuntime().exec("ping -c 1 www.google.com");??
??????????????????? // 等待该命令执行完毕。??
??????????????????? int status = p.waitFor();??
??????????????????? if (status == 0) {??
??????????????????????? // 正常退出??
??????????????????????? line += "Pass";??
??????????????????? } else {??
??????????????????????? // 异常退出??
??????????????????????? line += "Fail: Host unreachable";??
??????????????????? }??
??????????????????? is = p.getInputStream();??
??????????????????? byte[] data = new byte[is.available()];??
??????????????????? is.read(data);??
??????????????????? line += "\n" + new String(data);??
??????????????? } catch (UnknownHostException e) {??
??????????????????? line += "Fail: Unknown Host";??
??????????????? } catch (IOException e) {??
??????????????????? line += "Fail: IOException";??
??????????????? } catch (InterruptedException e) {??
??????????????????? line += "Fail: InterruptedException";??
??????????????? }??
??????????????? Message msg = new Message();??
??????????????? msg.what = APPEND_TEXT;??
??????????????? msg.obj = line;??
??????????????? handler.sendMessage(msg);??
??????????? }??
??????? }.start();??
??? }??
??? private void go2Network() {??
??????? new Thread() {??
??????????? public void run() {??
??????????????? String line = "";??
??????????????? URL url = null;??
??????????????? HttpURLConnection httpConn = null;??
??????????????? InputStream is = null;??
??????????????? try {??
??????????????????? url = new URL("http://www.sodino.com/index.html");??
??????????????????? // Log.d("ANDROID_LAB", "Protocol=" + new??
??????????????????? // URL("https://www.sodino.com").getProtocol());??
??????????????????? // 需要android.permission.ACCESS_NETWORK_STATE??
??????????????????? NetworkInfo networkInfo = ((ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE))??
??????????????????????????? .getActiveNetworkInfo();??
??????????????????? // 如果是使用的运营商网络??
??????????????????? if (networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {??
??????????????????????? // 获取默认代理主机ip??
??????????????????????? String host = android.net.Proxy.getDefaultHost();??
??????????????????????? // 获取端口??
??????????????????????? int port = android.net.Proxy.getDefaultPort();??
??????????????????????? if (host != null && port != -1) {??
??????????????????????????? line += "\nhost[" + host + "] port[" + port + "]";??
??????????????????????????? // 封装代理連接主机IP与端口号。??
??????????????????????????? InetSocketAddress inetAddress = new InetSocketAddress(host, port);??
??????????????????????????? // 根据URL链接获取代理类型，本链接适用于TYPE.HTTP??
??????????????????????????? java.net.Proxy.Type proxyType = java.net.Proxy.Type.valueOf(url??
??????????????????????????????????? .getProtocol().toUpperCase());??
??????????????????????????? java.net.Proxy javaProxy = new java.net.Proxy(proxyType, inetAddress);??
??????????????????????????? httpConn = (HttpURLConnection) url.openConnection(javaProxy);??
??????????????????????? } else {??
??????????????????????????? httpConn = (HttpURLConnection) url.openConnection();??
??????????????????????? }??
??????????????????? } else {??
??????????????????????? httpConn = (HttpURLConnection) url.openConnection();??
??????????????????? }??
??????????????????? httpConn.connect();??
??????????????????? int length = httpConn.getContentLength();??
??????????????????? byte[] data = new byte[length];??
??????????????????? String encoding = httpConn.getContentEncoding();??
??????????????????? line += "\nlength=" + length + " encoding=" + encoding;??
??????????????????? is = httpConn.getInputStream();??
??????????????????? is.read(data);??
??????????????????? String content = null;??
??????????????????? if (encoding != null) {??
??????????????????????? content = new String(data, encoding);??
??????????????????? } else {??
??????????????????????? content = new String(data);??
??????????????????? }??
??????????????????? line += "\nContent[\n" + content + "\n]";??
??????????????????? Message msg = new Message();??
??????????????????? msg.what = APPEND_TEXT;??
??????????????????? msg.obj = line;??
??????????????????? handler.sendMessage(msg);??
??????????????? } catch (IOException ie) {??
??????????????????? ie.printStackTrace();??
??????????????? } finally {??
??????????????????? try {??
??????????????????????? if (is != null) {??
??????????????????????????? is.close();??
??????????????????????? }??
??????????????????????? if (httpConn != null) {??
??????????????????????????? httpConn.disconnect();??
??????????????????????? }??
??????????????????? } catch (IOException ie) {??
??????????????????????? ie.printStackTrace();??
??????????????????? }??
??????????????? }??
??????????? }??
??????? }.start();??
??? }??
??? class BtnListener implements Button.OnClickListener {??
??????? public void onClick(View view) {??
??????????? if (view == btnPing) {??
??????????????? // doPing("www.google.com");??
??????????????? doPing("10.0.0.172");??
??????????? } else if (view == btnConnect) {??
??????????????? go2Network();??
??????????? } else if (view == btnClear) {??
??????????????? Message msg = new Message();??
??????????????? msg.what = CLEAR_TEXT;??
??????????????? handler.sendMessage(msg);??
??????????? }??
??????? }??
??? }??
}?
package lab.sodino.network;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.UnknownHostException;
import android.app.Activity;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class NetworkAct extends Activity {
?public static final int CLEAR_TEXT = 0;
?public static final int APPEND_TEXT = 1;
?private TextView txtInfo;
?private Button btnPing;
?private Button btnConnect;
?private Button btnClear;
?private BtnListener btnListener;
?private Handler handler = new Handler() {
??public void handleMessage(Message msg) {
???switch (msg.what) {
???case APPEND_TEXT:
????String content = msg.obj.toString();
????txtInfo.setText("\n" + content);
????break;
???case CLEAR_TEXT:
????txtInfo.setText("");
????break;
???}
??}
?};
?public void onCreate(Bundle savedInstanceState) {
??super.onCreate(savedInstanceState);
??setContentView(R.layout.main);
??btnListener = new BtnListener();
??txtInfo = (TextView) findViewById(R.id.txtInfo);
??btnPing = (Button) findViewById(R.id.btnPing);
??btnPing.setOnClickListener(btnListener);
??btnConnect = (Button) findViewById(R.id.btnConnect);
??btnConnect.setOnClickListener(btnListener);
??btnClear = (Button) findViewById(R.id.btnClear);
??btnClear.setOnClickListener(btnListener);
?}
?/**
? * @param param
? *??????????? 指定的域名如(www.google.com)或IP地址。
? */
?private void doPing(final String param) {
??new Thread() {
???public void run() {
????String line = "";
????InputStream is = null;
????try {
?????line = "\nping -c 1 " + param;
?????// -c 1:表示ping的次数为1次。
?????Process p = Runtime.getRuntime().exec("ping -c 1 www.google.com");
?????// 等待该命令执行完毕。
?????int status = p.waitFor();
?????if (status == 0) {
??????// 正常退出
??????line += "Pass";
?????} else {
??????// 异常退出
??????line += "Fail: Host unreachable";
?????}
?????is = p.getInputStream();
?????byte[] data = new byte[is.available()];
?????is.read(data);
?????line += "\n" + new String(data);
????} catch (UnknownHostException e) {
?????line += "Fail: Unknown Host";
????} catch (IOException e) {
?????line += "Fail: IOException";
????} catch (InterruptedException e) {
?????line += "Fail: InterruptedException";
????}
????Message msg = new Message();
????msg.what = APPEND_TEXT;
????msg.obj = line;
????handler.sendMessage(msg);
???}
??}.start();
?}
?private void go2Network() {
??new Thread() {
???public void run() {
????String line = "";
????URL url = null;
????HttpURLConnection httpConn = null;
????InputStream is = null;
????try {
?????url = new URL("http://www.sodino.com/index.html");
?????// Log.d("ANDROID_LAB", "Protocol=" + new
?????// URL("https://www.sodino.com").getProtocol());
?????// 需要android.permission.ACCESS_NETWORK_STATE
?????NetworkInfo networkInfo = ((ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE))
???????.getActiveNetworkInfo();
?????// 如果是使用的运营商网络
?????if (networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
??????// 获取默认代理主机ip
??????String host = android.net.Proxy.getDefaultHost();
??????// 获取端口
??????int port = android.net.Proxy.getDefaultPort();
??????if (host != null && port != -1) {
???????line += "\nhost[" + host + "] port[" + port + "]";
???????// 封装代理連接主机IP与端口号。
???????InetSocketAddress inetAddress = new InetSocketAddress(host, port);
???????// 根据URL链接获取代理类型，本链接适用于TYPE.HTTP
???????java.net.Proxy.Type proxyType = java.net.Proxy.Type.valueOf(url
?????????.getProtocol().toUpperCase());
???????java.net.Proxy javaProxy = new java.net.Proxy(proxyType, inetAddress);
???????httpConn = (HttpURLConnection) url.openConnection(javaProxy);
??????} else {
???????httpConn = (HttpURLConnection) url.openConnection();
??????}
?????} else {
??????httpConn = (HttpURLConnection) url.openConnection();
?????}
?????httpConn.connect();
?????int length = httpConn.getContentLength();
?????byte[] data = new byte[length];
?????String encoding = httpConn.getContentEncoding();
?????line += "\nlength=" + length + " encoding=" + encoding;
?????is = httpConn.getInputStream();
?????is.read(data);
?????String content = null;
?????if (encoding != null) {
??????content = new String(data, encoding);
?????} else {
??????content = new String(data);
?????}
?????line += "\nContent[\n" + content + "\n]";
?????Message msg = new Message();
?????msg.what = APPEND_TEXT;
?????msg.obj = line;
?????handler.sendMessage(msg);
????} catch (IOException ie) {
?????ie.printStackTrace();
????} finally {
?????try {
??????if (is != null) {
???????is.close();
??????}
??????if (httpConn != null) {
???????httpConn.disconnect();
??????}
?????} catch (IOException ie) {
??????ie.printStackTrace();
?????}
????}
???}
??}.start();
?}
?class BtnListener implements Button.OnClickListener {
??public void onClick(View view) {
???if (view == btnPing) {
????// doPing("www.google.com");
????doPing("10.0.0.172");
???} else if (view == btnConnect) {
????go2Network();
???} else if (view == btnClear) {
????Message msg = new Message();
????msg.what = CLEAR_TEXT;
????handler.sendMessage(msg);
???}
??}
?}
}
如此，悲剧的程序员解决了不同网络状态下如何保证正常链接的问题。
最后补充下：Android手机在CMWAP上要能够正常上网，除了设置一大堆代理数据外，还需进入拨号器下按"*#*#4636#*#*"→Phone Information下拉到最后后有个“Toggle DNS Check”，将其设置为allow
转载自：http://blog.csdn.net/sodino/archive/2011/04/05/6302313.aspx