java Android向服务器发送数据问题

Question

我在iOS中有一个应用程序，我正在发送数据，它工作正常，而这是我在Android中的第一个应用程序，我试图将数据发送到同一台服务器，但我遇到了一个问题

我在谷歌上搜索了很多，但不幸的是我最终得到了这个； 我的问题是什么

我的活动。爪哇

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import 安卓.content.Intent;
import 安卓.net.Uri;
import 安卓.provider.MediaStore;
import 安卓.graphics.BitmapFactory;
import 安卓.database.Cursor;
import 安卓.graphics.Bitmap;
import 安卓.support.v7.app.ActionBarActivity;
import 安卓.os.Bundle;
import 安卓.view.View;
import 安卓.widget.Button;
import 安卓.widget.ImageView;
import 安卓.widget.EditText;

我发送数据的代码

class btnSendClicker implements Button.OnClickListener
    {
        @Override
        public void onClick(View v) {
            {
                    HttpClient httpclient = new DefaultHttpClient();
                    HttpPost httppost = new HttpPost("http://myserver.com/form/feedback-mailer.php");
                    try {
                        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);

                        nameValuePairs.add(new BasicNameValuePair("name", "ab"));
                        nameValuePairs.add(new BasicNameValuePair("email", "abc@abc.com"));
                        nameValuePairs.add(new BasicNameValuePair("message", "abcd"));
                        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                        httpclient.execute(httppost);

                    } catch (ClientProtocolException e) {
                        // TODO Auto-generated catch block
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                    }
            }
        }
    }

我在AndriodManifest的权限。xml

<uses-permission 安卓:name="安卓.permission.INTERNET"/>
<uses-permission 安卓:name="安卓.permission.ACCESS_NETWORK_STATE" />

日志问题：

7-27 15:23:33.452    1245-1245/com.example.bitiz8.myapplicationtest E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.ABC.myapplicationtest, PID: 1245
    安卓.os.NetworkOnMainThreadException
            at 安卓.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1145)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
            at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
            at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
            at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
            at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
            at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
            at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
            at com.example.bitiz8.myapplicationtest.MyActivity$btnSendClicker.onClick(MyActivity.java:137)
            at 安卓.view.View.performClick(View.java:4438)
            at 安卓.view.View$PerformClick.run(View.java:18422)
            at 安卓.os.Handler.handleCallback(Handler.java:733)
            at 安卓.os.Handler.dispatchMessage(Handler.java:95)
            at 安卓.os.Looper.loop(Looper.java:136)
            at 安卓.app.ActivityThread.main(ActivityThread.java:5017)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
            at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:595)
            at dalvik.system.NativeStart.main(Native Method)

Answer 1

不能在UI线程中调用webservice。您可以使用Thread或Asynctask，但要小心Asynctask及其内存泄漏

Thread thread = new Thread(new Runnable(){
    @Override
    public void run() {
        try {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("http://myserver.com/form/feedback-mailer.php");
                try {
                    List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);

                    nameValuePairs.add(new BasicNameValuePair("name", "ab"));
                    nameValuePairs.add(new BasicNameValuePair("email", "abc@abc.com"));
                    nameValuePairs.add(new BasicNameValuePair("message", "abcd"));
                    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                    httpclient.execute(httppost);

                } catch (ClientProtocolException e) {
                        // TODO Auto-generated catch block
                } catch (IOException e) {
                        // TODO Auto-generated catch block
                }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
});

thread.start();

享受