Php Android应用程序-网络任务出错
我正在开发一个android应用程序。我有一个包含多个元素的列表视图。我使用php脚本从mysql数据库获取列表元素。但在获取项目时，我的应用程序崩溃，log cat显示以下错误。这里怎么了 这是我的logcat输出Php Android应用程序-网络任务出错,php,android,mysql,android-intent,Php,Android,Mysql,Android Intent,我正在开发一个android应用程序。我有一个包含多个元素的列表视图。我使用php脚本从mysql数据库获取列表元素。但在获取项目时，我的应用程序崩溃，log cat显示以下错误。这里怎么了 这是我的logcat输出 12-22 16:03:30.440: D/dalvikvm(1431): GC_FOR_ALLOC freed 233K, 8% free 3989K/4296K, paused 85ms, total 99ms 12-22 16:03:32.070: I/Choreograph
12-22 16:03:30.440: D/dalvikvm(1431): GC_FOR_ALLOC freed 233K, 8% free 3989K/4296K, paused 85ms, total 99ms
12-22 16:03:32.070: I/Choreographer(1431): Skipped 219 frames! The application may be doing too much work on its main thread.
12-22 16:03:32.610: D/AndroidRuntime(1431): Shutting down VM
12-22 16:03:32.610: W/dalvikvm(1431): threadid=1: thread exiting with uncaught exception (group=0xb3a55ba8)
12-22 16:03:32.690: E/AndroidRuntime(1431): FATAL EXCEPTION: main
12-22 16:03:32.690: E/AndroidRuntime(1431): Process: com.example.orders, PID: 1431
12-22 16:03:32.690: E/AndroidRuntime(1431): android.os.NetworkOnMainThreadException
12-22 16:03:32.690: E/AndroidRuntime(1431): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1145)
12-22 16:03:32.690: E/AndroidRuntime(1431): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
12-22 16:03:32.690: E/AndroidRuntime(1431): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
12-22 16:03:32.690: E/AndroidRuntime(1431): at libcore.io.IoBridge.connect(IoBridge.java:112)
12-22 16:03:32.690: E/AndroidRuntime(1431): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
12-22 16:03:32.690: E/AndroidRuntime(1431): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
12-22 16:03:32.690: E/AndroidRuntime(1431): at java.net.Socket.connect(Socket.java:843)
12-22 16:03:32.690: E/AndroidRuntime(1431): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
12-22 16:03:32.690: E/AndroidRuntime(1431): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
12-22 16:03:32.690: E/AndroidRuntime(1431): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
12-22 16:03:32.690: E/AndroidRuntime(1431): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
12-22 16:03:32.690: E/AndroidRuntime(1431): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
12-22 16:03:32.690: E/AndroidRuntime(1431): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
12-22 16:03:32.690: E/AndroidRuntime(1431): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
12-22 16:03:32.690: E/AndroidRuntime(1431): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
12-22 16:03:32.690: E/AndroidRuntime(1431): at com.example.orders.JSONParser.makeHttpRequest(JSONParser.java:62)
12-22 16:03:32.690: E/AndroidRuntime(1431): at com.example.orders.EditProductActivity$GetProductDetails$1.run(EditProductActivity.java:132)
12-22 16:03:32.690: E/AndroidRuntime(1431): at android.os.Handler.handleCallback(Handler.java:733)
12-22 16:03:32.690: E/AndroidRuntime(1431): at android.os.Handler.dispatchMessage(Handler.java:95)
12-22 16:03:32.690: E/AndroidRuntime(1431): at android.os.Looper.loop(Looper.java:136)
12-22 16:03:32.690: E/AndroidRuntime(1431): at android.app.ActivityThread.main(ActivityThread.java:5001)
12-22 16:03:32.690: E/AndroidRuntime(1431): at java.lang.reflect.Method.invokeNative(Native Method)
12-22 16:03:32.690: E/AndroidRuntime(1431): at java.lang.reflect.Method.invoke(Method.java:515)
12-22 16:03:32.690: E/AndroidRuntime(1431): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
12-22 16:03:32.690: E/AndroidRuntime(1431): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
12-22 16:03:32.690: E/AndroidRuntime(1431): at dalvik.system.NativeStart.main(Native Method)
12-22 16:03:41.360: I/Process(1431): Sending signal. PID: 1431 SIG: 9
12-22 16:03:42.990: D/gralloc_goldfish(1457): Emulator without GPU emulation detected.
package com.example.orders;
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://192.168.1.31/test/get_product_details.php";
// url to update product
private static final String url_update_product = "http://192.168.1.31/test/update_product.php";
// url to delete product
private static final String url_delete_product = "http://192.168.1.31/test/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);
// 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 uupdated
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();
}
}
}
package com.example.orders；
导入java.util.ArrayList；
导入java.util.List；
导入org.apache.http.NameValuePair；
导入org.apache.http.message.BasicNameValuePair；
导入org.json.JSONArray；
导入org.json.JSONException；
导入org.json.JSONObject；
导入android.app.Activity；
导入android.app.ProgressDialog；
导入android.content.Intent；
导入android.os.AsyncTask；
导入android.os.Bundle；
导入android.util.Log；
导入android.view.view；
导入android.widget.Button；
导入android.widget.EditText；
公共类EditProductActivity扩展了活动{
编辑文本txtName；
编辑文本txtPrice；
编辑文本txtDesc；
编辑文本txtCreatedAt；
按钮btnSave；
按钮btnDelete；
串pid；
//进度对话框
私人对话；
//JSON解析器类
JSONParser JSONParser=新的JSONParser（）；
//单一产品url
私有静态最终字符串url\u product\u detials=”http://192.168.1.31/test/get_product_details.php";
//更新产品的url
私有静态最终字符串url\u更新\u产品=”http://192.168.1.31/test/update_product.php";
//用于删除产品的url
私有静态最终字符串url\u delete\u product=”http://192.168.1.31/test/delete_product.php";
//JSON节点名称
私有静态最终字符串标记_SUCCESS=“SUCCESS”；
私有静态最终字符串TAG_PRODUCT=“PRODUCT”；
私有静态最终字符串标记_PID=“PID”；
私有静态最终字符串标记_NAME=“NAME”；
私有静态最终字符串标记_PRICE=“PRICE”；
私有静态最终字符串标记_DESCRIPTION=“DESCRIPTION”；
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.edit_产品）；
//保存按钮
btnSave=（按钮）findviewbyd（R.id.btnSave）；
btnDelete=（按钮）findViewById（R.id.btnDelete）；
//从intent获取产品详细信息
Intent i=getIntent（）；
//从intent获取产品id（pid）
pid=i.getStringExtra（标签\ pid）；
//在后台线程中获取完整的产品详细信息
新建GetProductDetails（）.execute（）；
//保存按钮单击事件
btnSave.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图arg0）{
//正在启动后台任务以更新产品
新建SaveProductDetails（）.execute（）；
}
});
//删除按钮单击事件
btnDelete.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图arg0）{
//删除后台线程中的产品
新的DeleteProduct（）.execute（）；
}
});
}
/**
*获取完整产品详细信息的后台异步任务
* */
类GetProductDetails扩展了AsyncTask{
/**
*在启动后台线程显示进度对话框之前
* */
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
pDialog=newprogressdialog（EditProductActivity.this）；
pDialog.setMessage（“正在加载产品详细信息。请稍候…”）；
pDialog.setUndeterminate（假）；
pDialog.setCancelable（真）；
pDialog.show（）；
}
/**
*在后台线程中获取产品详细信息
* */
受保护的字符串doInBackground（字符串…参数）{
//从后台线程更新UI
runOnUiThread（新的Runnable（）{
公开募捐{
//检查成功标签
成功；
试一试{
//建筑参数
List params=new ArrayList（）；
参数添加（新的BasicNameValuePair（“pid”，pid））；
//通过发出HTTP请求获取产品详细信息
//请注意，产品详细信息url将使用GET请求
JSONObject json=jsonParser.makeHttpRequest(
url（产品详细信息，“获取”，参数）；
//检查日志中的json响应
Log.d（“单一产品详细信息”，json.toString（））；
//json成功标记
success=json.getInt（TAG_success）；
如果（成功==1）{
//已成功接收产品详细信息
JSONArray productObj=json
.getJSONArray（TAG_PRODUCT）；//JSON数组
//从JSON数组中获取第一个产品对象
JSONObject product=productObj.getJSONObject（0）；
//找到具有此pid的产品
//编辑文本
txtName=（EditText）findViewById（R.id.inputName）；
txtPrice=（EditText）findViewById（R.id.inputPrice）；
txtDesc=（EditText）findViewById（R.id.inputDesc）；
//在编辑文本中显示产品数据
setText（product.getString（TAG_NAME））；
setText（product.getString（TAG_PRICE））；
txtDesc.setText（product.getString（TAG_DESCRIPTION））；
}否则{
//找不到具有pid的产品
}
}捕获（JSONExce）