package com.example.simplewebservices;
import java.io.IOException;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class MainActivity extends Activity {
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://192.168.0.11/android_connect/first.php");
try {
HttpResponse response = httpclient.execute(httppost);
final String str = EntityUtils.toString(response.getEntity());
TextView tv = (TextView) findViewById(R.id.textView1);
tv.setText(str);
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.simplewebservices.MainActivity" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView1"
android:text="TextView"/>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.simplewebservices"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="19"
android:targetSdkVersion="19" />
<uses-permission android:name="android.permission.INTERNET"/>
<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>
05-09 15:07:59.726: E/AndroidRuntime(2456): FATAL EXCEPTION: main
05-09 15:07:59.726: E/AndroidRuntime(2456): Process: com.example.simplewebservices, PID: 2456
05-09 15:07:59.726: E/AndroidRuntime(2456): java.lang.RuntimeException: Unable to start activity C omponentInfo{com.example.simplewebservices/com.example.simplewebservices.MainActivity}: android.os.NetworkOnMainThreadException
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.app.ActivityThread.access$800(ActivityThread.java:151)
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.os.Handler.dispatchMessage(Handler.java:102)
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.os.Looper.loop(Looper.java:135)
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.app.ActivityThread.main(ActivityThread.java:5254)
05-09 15:07:59.726: E/AndroidRuntime(2456): at java.lang.reflect.Method.invoke(Native Method)
05-09 15:07:59.726: E/AndroidRuntime(2456): at java.lang.reflect.Method.invoke(Method.java:372)
05-09 15:07:59.726: E/AndroidRuntime(2456): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
05-09 15:07:59.726: E/AndroidRuntime(2456): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
05-09 15:07:59.726: E/AndroidRuntime(2456): Caused by: android.os.NetworkOnMainThreadException
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1147)
05-09 15:07:59.726: E/AndroidRuntime(2456): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:110)
05-09 15:07:59.726: E/AndroidRuntime(2456): at libcore.io.IoBridge.connectErrno(IoBridge.java:137)
05-09 15:07:59.726: E/AndroidRuntime(2456): at libcore.io.IoBridge.connect(IoBridge.java:122)
05-09 15:07:59.726: E/AndroidRuntime(2456): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
05-09 15:07:59.726: E/AndroidRuntime(2456): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:456)
05-09 15:07:59.726: E/AndroidRuntime(2456): at java.net.Socket.connect(Socket.java:882)
05-09 15:07:59.726: E/AndroidRuntime(2456): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:124)
05-09 15:07:59.726: E/AndroidRuntime(2456): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:149)
05-09 15:07:59.726: E/AndroidRuntime(2456): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:169)
05-09 15:07:59.726: E/AndroidRuntime(2456): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:124)
05-09 15:07:59.726: E/AndroidRuntime(2456): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:365)
05-09 15:07:59.726: E/AndroidRuntime(2456): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:560)
05-09 15:07:59.726: E/AndroidRuntime(2456): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:492)
05-09 15:07:59.726: E/AndroidRuntime(2456): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:470)
05-09 15:07:59.726: E/AndroidRuntime(2456): at com.example.simplewebservices.MainActivity.onCreate(MainActivity.java:27)
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.app.Activity.performCreate(Activity.java:5990)
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
05-09 15:07:59.726: E/AndroidRuntime(2456): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
05-09 15:07:59.726: E/AndroidRuntime(2456): ... 10 more
`这是使用php.i的android中的简单webservices（hello world）创建php文件并将其复制到wamp server的www目录中。但是当我运行此应用程序时，它很遗憾地停止了。在下面我提到了logcat信息。它如何解决？给我建议..
答案 0 :(得分：0)
您从主线程调用HTTP连接的问题。您必须在其他线程中调用任何网络操作。
要解决此问题，请使用AsyncTask并对doInBackground方法执行http操作。这解决了这个例外。