如何解决:致命的异常:主要android.os.NetworkOnMainThreadException [英] how to fix: FATAL EXCEPTION:main android.os.NetworkOnMainThreadException

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问题描述

我有关于Android版本18.运行我的code probelms我已经使用了AsyncTask的,但仍然收到错误,plz帮助。我是一个小白编程所以请原谅我的错误

 包com.example.androidhive;

进口的java.util.ArrayList;

进口的java.util.List;

进口org.apache.http.NameValuePair;
进口org.apache.http.message.BasicNameValuePair;
进口org.json.JSONArray;
进口org.json.JSONException;
进口org.json.JSONObject;

进口android.app.Activity;
进口android.app.ProgressDialog;
进口android.content.Intent;
进口android.os.AsyncTask;
进口android.os.Bundle;
进口android.util.Log;
进口android.view.View;
进口android.widget.Button;
进口android.widget.EditText;


公共类EditProductActivity延伸活动{



    的EditText txtName的;
    的EditText txtPrice;
    的EditText txtDesc;
    的EditText txtCreatedAt;
    按钮btnSave;
    按钮btnDelete;

    字符串PID;


    //进度对话框
    私人ProgressDialog pDialog;

    // JSON解析器类
    JSONParser jsonParser =新JSONParser();

    //单品链接
    私有静态最后弦乐url_product_detials =htt​​p://10.0.2.2/android_connect/get_product_details.php;

    // URL来更新产品
    私有静态最后弦乐url_update_product =htt​​p://10.0.2.2/android_connect/update_product.php;

    // URL删除产品
    私有静态最后弦乐url_delete_product =htt​​p://10.0.2.2/android_connect/delete_product.php;

    // JSON节点名称
    私有静态最后弦乐TAG_SUCCESS =成功;
    私有静态最后弦乐TAG_PRODUCT =产品;
    私有静态最后弦乐TAG_PID =PID;
    私有静态最后弦乐TAG_NAME =名;
    私有静态最后弦乐TAG_PRICE =价格;
    私有静态最后弦乐TAG_DESCRIPTION =说明;

    @覆盖
    公共无效的onCreate(包savedInstanceState){
        super.onCreate(savedInstanceState);
        的setContentView(R.layout.edit_product);

        //保存按钮
        btnSave =(按钮)findViewById(R.id.btnSave);
        btnDelete =(按钮)findViewById(R.id.btnDelete);


        //获取来自意图产品的详细信息
        意图I = getIntent();

        //从意图获取产品ID(PID)
        PID = i.getStringExtra(TAG_PID);

        //获取在后台线程完整的产品信息
        新GetProductDetails()执行();

        //保存按钮点击事件
        btnSave.setOnClickListener(新View.OnClickListener(){

            @覆盖
            公共无效的onClick(查看为arg0){
                //启动后台任务来更新产品
                新SaveProductDetails()执行();
            }
        });

        //删除按钮点击事件
        btnDelete.setOnClickListener(新View.OnClickListener(){

            @覆盖
            公共无效的onClick(查看为arg0){
                //删除产品在后台线程
                新DeleteProduct()执行()。
            }
        });

    }

    / **
     *背景异步任务来获得完整的产品信息
     * * /
    类GetProductDetails扩展的AsyncTask<字符串,字符串,字符串> {

        / **
         *在启动后台线程显示进度对话框
         * * /
        @覆盖
        在preExecute保护无效(){
            super.on preExecute();
            pDialog =新ProgressDialog(EditProductActivity.this);
            pDialog.setMessage(装载产品的详细信息,请稍候...);
            pDialog.setIndeterminate(假);
            pDialog.setCancelable(真正的);
            pDialog.show();
        }

        / **
         *获取产品信息的后台线程
         * * /
        保护字符串doInBackground(字符串... PARAMS){

            //从后台线程更新UI
            runOnUiThread(新的Runnable(){
                公共无效的run(){
                    //检查成功标签
                    诠释成功;
                    尝试 {
                        //大厦参数
                        名单<的NameValuePair> PARAMS =新的ArrayList<的NameValuePair>();
                        params.add(新BasicNameValuePair(PID,PID));

                        //获取产品的详细信息通过HTTP请求
                        //注意产品细节的URL会使用GET请求
                        JSONObject的JSON = jsonParser.makeHtt prequest(
                                url_product_detials,GET,则params);

                        //检查你的日志,JSON响应
                        Log.d(单一产品详细信息,json.toString());

                        // json的成功标签
                        成功= json.getInt(TAG_SUCCESS);
                        如果(成功== 1){
                            //成功接收产品的详细信息
                            JSONArray productObj = JSON
                                    .getJSONArray(TAG_PRODUCT); // JSON数组

                            //从JSON数组的第一个产品对象
                            的JSONObject产物= productObj.getJSONObject(0);
                            的setContentView(R.layout.edit_product);

                            //产品,该PID发现
                            //编辑文本
                            txtName的=(的EditText)findViewById(R.id.inputName);
                            txtPrice =(EditText上)findViewById(R.id.inputPrice);
                            txtDesc =(EditText上)findViewById(R.id.inputDesc);

                            在EditText上//显示产品数据
                            txtName.setText(product.getString(TAG_NAME));
                            txtPrice.setText(product.getString(TAG_PRICE));
                            txtDesc.setText(product.getString(TAG_DESCRIPTION));

                        }其他{
                            //没有找到产品与PID
                        }
                    }赶上(JSONException E){
                        e.printStackTrace();
                    }
                }
            });

            返回null;
        }


        / **
         *在完成后台任务之后关闭该进度对话框
         * ** /
        保护无效onPostExecute(字符串file_url){
            //关闭该对话框,一旦得到了所有细节
            pDialog.dismiss();
        }
    }

    / **
     *背景异步任务保存产品的详细信息
     * * /
    类SaveProductDetails扩展的AsyncTask<字符串,字符串,字符串> {

        / **
         *在启动后台线程显示进度对话框
         * * /
        @覆盖
        在preExecute保护无效(){
            super.on preExecute();
            pDialog =新ProgressDialog(EditProductActivity.this);
            pDialog.setMessage(节能产品......);
            pDialog.setIndeterminate(假);
            pDialog.setCancelable(真正的);
            pDialog.show();
        }

        / **
         *节能产品
         * * /
        保护字符串doInBackground(字符串参数... args){

            //获取来自EditTexts更新数据
            字符串名称= txtName.getText()的toString()。
            串价格= txtPrice.getText()的toString()。
            。字符串描述= txtDesc.getText()的toString();

            //大厦参数
            名单<的NameValuePair> PARAMS =新的ArrayList<的NameValuePair>();
            params.add(新BasicNameValuePair(TAG_PID,PID));
            params.add(新BasicNameValuePair(TAG_NAME,名));
            params.add(新BasicNameValuePair(TAG_PRICE,价格));
            params.add(新BasicNameValuePair(TAG_DESCRIPTION,描述));

            //通过发送HTTP请求修改数据
            //注意,更新的产品网址接受POST方法
            JSONObject的JSON = jsonParser.makeHtt prequest(url_update_product,
                    POST,则params);

            //检查JSON的成功标签
            尝试 {
                INT成功= json.getInt(TAG_SUCCESS);

                如果(成功== 1){
                    //成功更新
                    意图I = getIntent();
                    //发送结果code 100,通知有关产品更新
                    的setResult(100,I);
                    完();
                } 其他 {
                    //无法更新产品
                }
            }赶上(JSONException E){
                e.printStackTrace();
            }

            返回null;
        }


        / **
         *在完成后台任务之后关闭该进度对话框
         * ** /
        保护无效onPostExecute(字符串file_url){
            //关闭该对话框一次产品更新
            pDialog.dismiss();
        }
    }

    / ******************* ****************
     *背景异步任务删​​除产品
     * * /
    类DeleteProduct扩展的AsyncTask<字符串,字符串,字符串> {

        / **
         *在启动后台线程显示进度对话框
         * * /
        @覆盖
        在preExecute保护无效(){
            super.on preExecute();
            pDialog =新ProgressDialog(EditProductActivity.this);
            pDialog.setMessage(删除产品......);
            pDialog.setIndeterminate(假);
            pDialog.setCancelable(真正的);
            pDialog.show();
        }

        / **
         *删除产品
         * * /
        保护字符串doInBackground(字符串参数... args){

            //检查成功标签
            诠释成功;
            尝试 {
                //大厦参数
                名单<的NameValuePair> PARAMS =新的ArrayList<的NameValuePair>();
                params.add(新BasicNameValuePair(PID,PID));

                //获取产品的详细信息通过HTTP请求
                JSONObject的JSON = jsonParser.makeHtt prequest(
                        url_delete_product,POST,PARAMS);

                //检查你的日志,JSON响应
                Log.d(删除产品,json.toString());

                // json的成功标签
                成功= json.getInt(TAG_SUCCESS);
                如果(成功== 1){
                    //产品成功删除
                    //通过发送code 100通知previous活动
                    意图I = getIntent();
                    //发送结果code 100,通知有关产品缺失
                    的setResult(100,I);
                    完();
                }
            }赶上(JSONException E){
                e.printStackTrace();
            }

            返回null;
        }

        / **
         *在完成后台任务之后关闭该进度对话框
         * ** /
        保护无效onPostExecute(字符串file_url){
            //关闭该对话框,一旦产品中删除
            pDialog.dismiss();

        }

    }
    }
 

错误我得到的是:

  10-27 17:01:52.858:E / AndroidRuntime(2001年):致命异常:主要
10-27 17:01:52.858:E / AndroidRuntime(2001年):android.os.NetworkOnMainThreadException
10-27 17:01:52.858:E / AndroidRuntime(2001年):在android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1133)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在libcore.io.IoBridge.connectErrno(IoBridge.java:127)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在libcore.io.IoBridge.connect(IoBridge.java:112)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在java.net.Socket.connect(Socket.java:842)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在com.example.androidhive.JSONParser.makeHtt prequest(JSONParser.java:62)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在com.example.androidhive.EditProductActivity $ GetProductDetails $ 1.运行(EditProductActivity.java:137)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在android.os.Handler.handleCallback(Handler.java:730)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在android.os.Handler.dispatchMessage(Handler.java:92)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在android.os.Looper.loop(Looper.java:137)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在android.app.ActivityThread.main(ActivityThread.java:5103)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在java.lang.reflect.Method.invokeNative(本机方法)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在java.lang.reflect.Method.invoke(Method.java:525)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:737)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-27 17:01:52.858:E / AndroidRuntime(2001年):在dalvik.system.NativeStart.main(本机方法)
 

和布局XML布局看起来是这样的:

 < XML版本=1.0编码=UTF-8&GT?;
< LinearLayout中的xmlns:机器人=htt​​p://schemas.android.com/apk/res/android
    机器人:layout_width =match_parent
    机器人:layout_height =match_parent
    机器人:方向=垂直>

    <! - 名称标签 - >

    <的TextView
        机器人:layout_width =FILL_PARENT
        机器人:layout_height =WRAP_CONTENT
        机器人:以下属性来=10dip
        机器人:paddingRight =10dip
        机器人:paddingTop =10dip
        机器人:文本=@字符串/ Product_Name2
        机器人:TEXTSIZE =17sp/>

    <! - 输入名称 - >
    < EditText上机器人:ID =@ + ID / inputName
        机器人:layout_width =FILL_PARENT
        机器人:layout_height =WRAP_CONTENT
        机器人:提示=@字符串/ inputName2
        机器人:layout_margin =5dip
        机器人:layout_marginBottom =15dip
        机器人:单线=真/>

    <! - 价格标签 - >

    <的TextView
        机器人:layout_width =FILL_PARENT
        机器人:layout_height =WRAP_CONTENT
        机器人:以下属性来=10dip
        机器人:paddingRight =10dip
        机器人:paddingTop =10dip
        机器人:文本=@字符串/ Price2
        机器人:TEXTSIZE =17sp/>

    <! - 输入价格 - >
    < EditText上机器人:ID =@ + ID / inputPrice
        机器人:layout_width =FILL_PARENT
        机器人:layout_height =WRAP_CONTENT
        机器人:layout_margin =5dip
        机器人:layout_marginBottom =15dip
        机器人:单线=真
        机器人:inputType =numberDecimal/>

    <! - 说明标签 - >

    <的TextView
        机器人:layout_width =FILL_PARENT
        机器人:layout_height =WRAP_CONTENT
        机器人:以下属性来=10dip
        机器人:paddingRight =10dip
        机器人:paddingTop =10dip
        机器人:文本=@字符串/描述2
        机器人:TEXTSIZE =17sp/>

    <! - 输入描述 - >
    < EditText上机器人:ID =@ + ID / inputDesc
        机器人:layout_width =FILL_PARENT
        机器人:layout_height =WRAP_CONTENT
        机器人:提示=@字符串/ inputDesc2
        机器人:layout_margin =5dip
        机器人:layout_marginBottom =15dip
        机器人:行=4
        机器人:重力=顶/>

    < LinearLayout中的android:layout_width =FILL_PARENT
        机器人:layout_height =WRAP_CONTENT
        机器人:方向=横向>
        <! - 按钮创建产品 - >

    <按钮
        机器人:ID =@ + ID / btnSave
        机器人:layout_width =FILL_PARENT
        机器人:layout_height =WRAP_CONTENT
        机器人:layout_weight =1
        机器人:文本=@字符串/ Save_Changes/>

    <! - 按钮创建产品 - >

    <按钮
        机器人:ID =@ + ID / btnDelete
        机器人:layout_width =FILL_PARENT
        机器人:layout_height =WRAP_CONTENT
        机器人:layout_weight =1
        机器人:文本=@字符串/删除/>

    < / LinearLayout中>

< / LinearLayout中>
 

解决方案

在GetProductDetails类只使用试捕。除去runOnUiThread()。

i am having probelms running my code on android version 18. i have used the AsyncTask but still getting an error, plz help. I am a noob to programming so please excuse my errors

package com.example.androidhive;

import java.util.ArrayList;

import java.util.List;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;


public class EditProductActivity extends Activity {



    EditText txtName;
    EditText txtPrice;
    EditText txtDesc;
    EditText txtCreatedAt;
    Button btnSave;
    Button btnDelete;

    String pid;


    // Progress Dialog
    private ProgressDialog pDialog;

    // JSON parser class
    JSONParser jsonParser = new JSONParser();

    // single product url
    private static final String url_product_detials = "http://10.0.2.2/android_connect/get_product_details.php";

    // url to update product
    private static final String url_update_product = "http://10.0.2.2/android_connect/update_product.php";

    // url to delete product
    private static final String url_delete_product = "http://10.0.2.2/android_connect/delete_product.php";

    // JSON Node names
    private static final String TAG_SUCCESS = "success";
    private static final String TAG_PRODUCT = "product";
    private static final String TAG_PID = "pid";
    private static final String TAG_NAME = "name";
    private static final String TAG_PRICE = "price";
    private static final String TAG_DESCRIPTION = "description";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.edit_product);

        // save button
        btnSave = (Button) findViewById(R.id.btnSave);
        btnDelete = (Button) findViewById(R.id.btnDelete);


        // getting product details from intent
        Intent i = getIntent();

        // getting product id (pid) from intent
        pid = i.getStringExtra(TAG_PID);

        // Getting complete product details in background thread
        new GetProductDetails().execute();

        // save button click event
        btnSave.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // starting background task to update product
                new SaveProductDetails().execute();
            }
        });

        // Delete button click event
        btnDelete.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // deleting product in background thread
                new DeleteProduct().execute();
            }
        });

    }

    /**
     * Background Async Task to Get complete product details
     * */
    class GetProductDetails extends AsyncTask<String, String, String> {

        /**
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(EditProductActivity.this);
            pDialog.setMessage("Loading product details. Please wait...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        /**
         * Getting product details in background thread
         * */
        protected String doInBackground(String... params) {

            // updating UI from Background Thread
            runOnUiThread(new Runnable() {
                public void run() {
                    // Check for success tag
                    int success;
                    try {
                        // Building Parameters
                        List<NameValuePair> params = new ArrayList<NameValuePair>();
                        params.add(new BasicNameValuePair("pid", pid));

                        // getting product details by making HTTP request
                        // Note that product details url will use GET request
                        JSONObject json = jsonParser.makeHttpRequest(
                                url_product_detials, "GET", params);

                        // check your log for json response
                        Log.d("Single Product Details", json.toString());

                        // json success tag
                        success = json.getInt(TAG_SUCCESS);
                        if (success == 1) {
                            // successfully received product details
                            JSONArray productObj = json
                                    .getJSONArray(TAG_PRODUCT); // JSON Array

                            // get first product object from JSON Array
                            JSONObject product = productObj.getJSONObject(0);
                            setContentView(R.layout.edit_product);

                            // product with this pid found
                            // Edit Text
                            txtName = (EditText) findViewById(R.id.inputName);
                            txtPrice = (EditText) findViewById(R.id.inputPrice);
                            txtDesc = (EditText) findViewById(R.id.inputDesc);

                            // display product data in EditText
                            txtName.setText(product.getString(TAG_NAME));
                            txtPrice.setText(product.getString(TAG_PRICE));
                            txtDesc.setText(product.getString(TAG_DESCRIPTION));

                        }else{
                            // product with pid not found
                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            });

            return null;
        }


        /**
         * After completing background task Dismiss the progress dialog
         * **/
        protected void onPostExecute(String file_url) {
            // dismiss the dialog once got all details
            pDialog.dismiss();
        }
    }

    /**
     * Background Async Task to  Save product Details
     * */
    class SaveProductDetails extends AsyncTask<String, String, String> {

        /**
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(EditProductActivity.this);
            pDialog.setMessage("Saving product ...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        /**
         * Saving product
         * */
        protected String doInBackground(String... args) {

            // getting updated data from EditTexts
            String name = txtName.getText().toString();
            String price = txtPrice.getText().toString();
            String description = txtDesc.getText().toString();

            // Building Parameters
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair(TAG_PID, pid));
            params.add(new BasicNameValuePair(TAG_NAME, name));
            params.add(new BasicNameValuePair(TAG_PRICE, price));
            params.add(new BasicNameValuePair(TAG_DESCRIPTION, description));

            // sending modified data through http request
            // Notice that update product url accepts POST method
            JSONObject json = jsonParser.makeHttpRequest(url_update_product,
                    "POST", params);

            // check json success tag
            try {
                int success = json.getInt(TAG_SUCCESS);

                if (success == 1) {
                    // successfully updated
                    Intent i = getIntent();
                    // send result code 100 to notify about product update
                    setResult(100, i);
                    finish();
                } else {
                    // failed to update product
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

            return null;
        }


        /**
         * After completing background task Dismiss the progress dialog
         * **/
        protected void onPostExecute(String file_url) {
            // dismiss the dialog once product updated
            pDialog.dismiss();
        }
    }

    /*****************************************************************
     * Background Async Task to Delete Product
     * */
    class DeleteProduct extends AsyncTask<String, String, String> {

        /**
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            pDialog = new ProgressDialog(EditProductActivity.this);
            pDialog.setMessage("Deleting Product...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        /**
         * Deleting product
         * */
        protected String doInBackground(String... args) {

            // Check for success tag
            int success;
            try {
                // Building Parameters
                List<NameValuePair> params = new ArrayList<NameValuePair>();
                params.add(new BasicNameValuePair("pid", pid));

                // getting product details by making HTTP request
                JSONObject json = jsonParser.makeHttpRequest(
                        url_delete_product, "POST", params);

                // check your log for json response
                Log.d("Delete Product", json.toString());

                // json success tag
                success = json.getInt(TAG_SUCCESS);
                if (success == 1) {
                    // product successfully deleted
                    // notify previous activity by sending code 100
                    Intent i = getIntent();
                    // send result code 100 to notify about product      deletion
                    setResult(100, i);
                    finish();
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

            return null;
        }

        /**
         * After completing background task Dismiss the progress dialog
         * **/
        protected void onPostExecute(String file_url) {
            // dismiss the dialog once product deleted
            pDialog.dismiss();

        }

    }
    }

the error i am getting is:

10-27 17:01:52.858: E/AndroidRuntime(2001): FATAL EXCEPTION: main
10-27 17:01:52.858: E/AndroidRuntime(2001): android.os.NetworkOnMainThreadException
10-27 17:01:52.858: E/AndroidRuntime(2001):     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1133)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at libcore.io.IoBridge.connect(IoBridge.java:112)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at java.net.Socket.connect(Socket.java:842)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at com.example.androidhive.JSONParser.makeHttpRequest(JSONParser.java:62)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at com.example.androidhive.EditProductActivity$GetProductDetails$1.run(EditProductActivity.java:137)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at android.os.Handler.handleCallback(Handler.java:730)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at android.os.Handler.dispatchMessage(Handler.java:92)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at android.os.Looper.loop(Looper.java:137)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at android.app.ActivityThread.main(ActivityThread.java:5103)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at java.lang.reflect.Method.invokeNative(Native Method)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at java.lang.reflect.Method.invoke(Method.java:525)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-27 17:01:52.858: E/AndroidRuntime(2001):     at dalvik.system.NativeStart.main(Native Method)

and the layout xml layout looks like this:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <!-- Name Label -->

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="10dip"
        android:paddingRight="10dip"
        android:paddingTop="10dip"
        android:text="@string/Product_Name2"
        android:textSize="17sp" />

    <!-- Input Name -->
    <EditText android:id="@+id/inputName"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="@string/inputName2"
        android:layout_margin="5dip"
        android:layout_marginBottom="15dip"
        android:singleLine="true"/>

    <!-- Price Label -->

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="10dip"
        android:paddingRight="10dip"
        android:paddingTop="10dip"
        android:text="@string/Price2"
        android:textSize="17sp" />

    <!-- Input Price -->
    <EditText android:id="@+id/inputPrice"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dip"
        android:layout_marginBottom="15dip"
        android:singleLine="true"
        android:inputType="numberDecimal"/>

    <!-- Description Label -->

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingLeft="10dip"
        android:paddingRight="10dip"
        android:paddingTop="10dip"
        android:text="@string/Description2"
        android:textSize="17sp" />

    <!-- Input description -->
    <EditText android:id="@+id/inputDesc"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="@string/inputDesc2"
        android:layout_margin="5dip"
        android:layout_marginBottom="15dip"
        android:lines="4"
        android:gravity="top"/>

    <LinearLayout android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <!-- Button Create Product -->

    <Button
        android:id="@+id/btnSave"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/Save_Changes" />

    <!-- Button Create Product -->

    <Button
        android:id="@+id/btnDelete"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/Delete" />

    </LinearLayout>

</LinearLayout>

解决方案

In the GetProductDetails class use only try catch. remove the runOnUiThread() .

这篇关于如何解决:致命的异常:主要android.os.NetworkOnMainThreadException的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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