android app无法连接互联网
我使用模拟器开发android应用程序，使用模拟器中的浏览器可以访问互联网，但我的应用程序不能访问，请高手看看是什么问题，多谢！ （android的版本是4.0）
Java代码如下：
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- Java code
package com.android.network;import java.net.MalformedURLException;import java.net.URL;import java.io.InputStream;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;public class ReadBytesActivity extends Activity{ private static final String DEBUG_TAG = "ReadBytesActivity"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Log.i(DEBUG_TAG, "application start!"); Button go = (Button)findViewById(R.id.do_action); go.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { try { URL text = new URL("http://www.liyebei.com/index.html"); InputStream isText = text.openStream(); byte[] bText = new byte[250]; int readSize = isText.read(bText); Log.i(DEBUG_TAG, "read size = " + readSize); Log.i(DEBUG_TAG, "byte text = " + new String(bText)); isText.close(); } catch(MalformedURLException e) { e.printStackTrace(); Log.i(DEBUG_TAG, "the URL cann't be find"); } catch(Exception e) { e.printStackTrace(); Log.i(DEBUG_TAG, "there are some problems"); } } }); } }对应的Layout代码如下：
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- XML code
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/instruct" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Press button for action" /> <Button android:id="@+id/do_action" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Go!" /> </LinearLayout> <TextSwitcher android:id="@+id/status" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <ImageSwitcher android:id="@+id/images" android:layout_width="fill_parent" android:layout_height="wrap_content" /> <TextSwitcher android:id="@+id/info" android:layout_width="fill_parent" android:layout_height="wrap_content" /></LinearLayout>
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对应的Manifest.xml如下：
- XML code
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.android.network" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="14" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> <uses-permission android:name="android.permission.INTERNET"/> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:label="@string/app_name" android:name=".NetworkingActivity" > <intent-filter > <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".NetworkStatusActivity"></activity> <activity android:name=".ReadBytesActivity"></activity> </application></manifest>
还请高手指点一下，多谢
[解决办法]
你需要设置HTTP请求头内容，wap连接需加代理，RequestMethod等