我在本地建了个web:199.99.99.144
打开模拟器通过浏览器直接输入地址http://199.99.99.144:80/Test/hjkhk.txt可以访问本机和本地web
但是为什么通过url就不行了
package com.web.test;import java.io.BufferedInputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import org.apache.http.util.ByteArrayBuffer;
import org.apache.http.util.EncodingUtils;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
/*
* 获取网络数据,这里展示如何获取网络上的一个hjkhk.txt文本文件,架设了一个本地服务器
*/
public class WebTest extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView tv = new TextView(this);
String myString = null;
try {
URL uri = new URL("http://199.99.99.144:80/Test/hjkhk.txt");//注意,这里的URL地址必须为网络地址,
//URL uri = new URL("http://localhost:8080/my/poem.txt");
//本地地址http://localhost:8080/my/poem.txt会报Connection Refused的异常
URLConnection ucon = uri.openConnection();
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayBuffer baf = new ByteArrayBuffer(100);
int current = 0;
while((current = bis.read()) != -1) {
baf.append((byte)current);
}
//myString = new String(baf.toByteArray(), "GBK");
myString = EncodingUtils.getString(baf.toByteArray(), "GBK");
//myString = new String(baf.toByteArray());这个出现乱码,要在txt文件保存时选中utf-8
} catch(Exception e) {
myString = e.getMessage();
}
tv.setText(myString);
this.setContentView(tv);
}
}
网络权限也加了<uses-permission android:name="android.permission.INTERNET" />
得到的myString是空的
求解
打开模拟器通过浏览器直接输入地址http://199.99.99.144:80/Test/hjkhk.txt可以访问本机和本地web
但是为什么通过url就不行了
package com.web.test;import java.io.BufferedInputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import org.apache.http.util.ByteArrayBuffer;
import org.apache.http.util.EncodingUtils;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
/*
* 获取网络数据,这里展示如何获取网络上的一个hjkhk.txt文本文件,架设了一个本地服务器
*/
public class WebTest extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView tv = new TextView(this);
String myString = null;
try {
URL uri = new URL("http://199.99.99.144:80/Test/hjkhk.txt");//注意,这里的URL地址必须为网络地址,
//URL uri = new URL("http://localhost:8080/my/poem.txt");
//本地地址http://localhost:8080/my/poem.txt会报Connection Refused的异常
URLConnection ucon = uri.openConnection();
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayBuffer baf = new ByteArrayBuffer(100);
int current = 0;
while((current = bis.read()) != -1) {
baf.append((byte)current);
}
//myString = new String(baf.toByteArray(), "GBK");
myString = EncodingUtils.getString(baf.toByteArray(), "GBK");
//myString = new String(baf.toByteArray());这个出现乱码,要在txt文件保存时选中utf-8
} catch(Exception e) {
myString = e.getMessage();
}
tv.setText(myString);
this.setContentView(tv);
}
}
网络权限也加了<uses-permission android:name="android.permission.INTERNET" />
得到的myString是空的
求解
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//本地地址http://localhost:8080/my/poem.txt会报Connection Refused的异常 局域网里,需要用模拟器带的工具转IP 端口到 PC机上。下面是 Android官方文档上的
Forwarding PortsYou can use the forward command to set up arbitrary port forwarding — forwarding of requests on a specific host port to a different port on an emulator/device instance. Here's how you would set up forwarding of host port 6100 to emulator/device port 7100:adb forward tcp:6100 tcp:7100
You can also use adb to set up forwarding to named abstract UNIX domain sockets, as illustrated here:adb forward tcp:6100 local:logd
至于tomcat下了个6.0的
因为我的JDK也是6.0的
解压发现bin目录下startup.bat运行不起来
安装不了
我估计的错误是因为没有添加JAVA_HOME环境变量,值为java的安装目录
环境变量我设了啊
JAVA_HOME
C:\Program Files\Java
PATH
%JAVA_HOME%\bin;
你在命令行中运行startup.bat这个脚本
tomcat服务器搭建好了
代码中IP也改成本机IP199.99.99.144
显示到界面的myString还是没有
应该是import 什么
刚接触java和android
我本来是做C++的
浏览器可以打开所有web
就是代码得不到
12-15 10:48:33.615: E/AndroidRuntime(88): java.lang.NullPointerException
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.internal.os.RuntimeInit.wtf(RuntimeInit.java:345)
12-15 10:48:33.615: E/AndroidRuntime(88): at android.util.Log$1.onTerribleFailure(Log.java:103)
12-15 10:48:33.615: E/AndroidRuntime(88): at android.util.Log.wtf(Log.java:278)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.internal.os.BatteryStatsImpl.getNetworkStatsDetailGroupedByUid(BatteryStatsImpl.java:5734)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.internal.os.BatteryStatsImpl.access$100(BatteryStatsImpl.java:76)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.internal.os.BatteryStatsImpl$Uid.computeCurrentTcpBytesReceived(BatteryStatsImpl.java:2453)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.internal.os.BatteryStatsImpl$Uid.getTcpBytesReceived(BatteryStatsImpl.java:2442)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.internal.os.BatteryStatsImpl.writeSummaryToParcel(BatteryStatsImpl.java:5433)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.internal.os.BatteryStatsImpl.writeLocked(BatteryStatsImpl.java:4832)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.internal.os.BatteryStatsImpl.writeAsyncLocked(BatteryStatsImpl.java:4814)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.server.am.ActivityManagerService.<init>(ActivityManagerService.java:1386)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.server.am.ActivityManagerService.<init>(ActivityManagerService.java:148)
12-15 10:48:33.615: E/AndroidRuntime(88): at com.android.server.am.ActivityManagerService$AThread.run(ActivityManagerService.java:1288)
12-15 10:48:35.684: E/StrictMode(88): A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks.
12-15 10:48:35.684: E/StrictMode(88): java.lang.Throwable: Explicit termination method 'close' not called
12-15 10:48:35.684: E/StrictMode(88): at dalvik.system.CloseGuard.open(CloseGuard.java:184)
12-15 10:48:35.684: E/StrictMode(88): at java.io.FileInputStream.<init>(FileInputStream.java:80)
12-15 10:48:35.684: E/StrictMode(88): at com.android.server.pm.UserManager.readUserList(UserManager.java:114)
12-15 10:48:35.684: E/StrictMode(88): at com.android.server.pm.UserManager.<init>(UserManager.java:81)
12-15 10:48:35.684: E/StrictMode(88): at com.android.server.pm.UserManager.<init>(UserManager.java:85)
12-15 10:48:35.684: E/StrictMode(88): at com.android.server.pm.PackageManagerService.<init>(PackageManagerService.java:923)
12-15 10:48:35.684: E/StrictMode(88): at com.android.server.pm.PackageManagerService.main(PackageManagerService.java:833)
12-15 10:48:35.684: E/StrictMode(88): at com.android.server.ServerThread.run(SystemServer.java:163)
12-15 10:48:51.925: E/SoundPool(88): error loading /system/media/audio/ui/Lock.ogg
12-15 10:48:51.925: E/SoundPool(88): error loading /system/media/audio/ui/Unlock.ogg
12-15 10:48:52.427: E/EventHub(88): could not get driver version for /dev/input/mouse0, Not a typewriter
12-15 10:48:52.427: E/EventHub(88): could not get driver version for /dev/input/mice, Not a typewriter
12-15 10:48:53.136: E/CommandListener(31): Failed to open /proc/sys/net/ipv6/conf/wlan0/disable_ipv6: No such file or directory
12-15 10:48:53.145: E/WifiStateMachine(88): Failed to disable IPv6: java.lang.IllegalStateException: Unable to communicate to native daemon for disabling ipv6
12-15 10:48:53.285: E/MobileDataStateTracker(88): default: Ignoring feature request because could not acquire PhoneService
12-15 10:48:53.285: E/MobileDataStateTracker(88): default: Could not enable APN type "default"
12-15 10:49:05.235: E/ActivityThread(157): Failed to find provider info for com.android.inputmethod.latin.dictionarypack
12-15 10:49:05.244: E/BinaryDictionaryGetter(157): Could not find a dictionary pack
12-15 10:49:10.756: E/StrictMode(180): Finalizing a Cursor that has not been deactivated or closed. database = /data/data/com.android.launcher/databases/launcher.db, table = null, query = SELECT MAX(_id) FROM favorites
12-15 10:49:10.756: E/StrictMode(180): android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here
12-15 10:49:10.756: E/StrictMode(180): at android.database.sqlite.SQLiteCursor.<init>(SQLiteCursor.java:98)
12-15 10:49:10.756: E/StrictMode(180): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:51)
12-15 10:49:10.756: E/StrictMode(180): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1573)
12-15 10:49:10.756: E/StrictMode(180): at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1542)
12-15 10:49:10.756: E/StrictMode(180): at com.android.launcher2.LauncherProvider$DatabaseHelper.initializeMaxId(LauncherProvider.java:597)
12-15 10:49:10.756: E/StrictMode(180): at com.android.launcher2.LauncherProvider$DatabaseHelper.<init>(LauncherProvider.java:221)
12-15 10:49:10.756: E/StrictMode(180): at com.android.launcher2.LauncherProvider.onCreate(LauncherProvider.java:87)
12-15 10:49:10.756: E/StrictMode(180): at android.content.ContentProvider.attachInfo(ContentProvider.java:941)
12-15 10:49:10.756: E/StrictMode(180): at android.app.ActivityThread.installProvider(ActivityThread.java:4198)
12-15 10:49:10.756: E/StrictMode(180): at android.app.ActivityThread.installContentProviders(ActivityThread.java:3963)
12-15 10:49:10.756: E/StrictMode(180): at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3917)
12-15 10:49:10.756: E/StrictMode(180): at android.app.ActivityThread.access$1300(ActivityThread.java:122)
12-15 10:49:10.756: E/StrictMode(180): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1184)
12-15 10:49:10.756: E/StrictMode(180): at android.os.Handler.dispatchMessage(Handler.java:99)
12-15 10:49:10.756: E/StrictMode(180): at android.os.Looper.loop(Looper.java:137)
12-15 10:49:10.756: E/StrictMode(180): at android.app.ActivityThread.main(ActivityThread.java:4340)
12-15 10:49:10.756: E/StrictMode(180): at java.lang.reflect.Method.invokeNative(Native Method)
12-15 10:49:10.756: E/StrictMode(180): at java.lang.reflect.Method.invoke(Method.java:511)
12-15 10:49:10.756: E/StrictMode(180): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
12-15 10:49:10.756: E/StrictMode(180): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
之前点错工程了,LogCat日志很多,黑红相间
为什么浏览器却可以上本地web比如199.99.99.144
明显是ping不通的网络
还是ping的通ping不通不影响?
关了肯定连不上ping不通
开了能连上ping不通