我正在 android 中编写一个应用程序，以使用 mysql 和 JSON 从 php 页面读取信息。我还在我的应用程序中使用 JSONParser 类来读取，但它不起作用并且我的应用程序崩溃了。我不知道出了什么问题。这是我的代码:
package com.toloee.iman.haminjuri;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
private ListView mListView;
private ProgressDialog pDialog;
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> productsList;
private static String url_all_products = "http://imankm.esy.es/get_all_products.php";
private static final String TAG_SUCCESS = "success";
private static final String TAG_PRODUCTS = "products";
private static final String TAG_PID = "id";
private static final String TAG_NAME = "name";
JSONArray products = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Hashmap for ListView
productsList = new ArrayList<HashMap<String, String>>();
// Loading products in Background Thread
new LoadAllProducts().execute();
}
// Response from Edit Product Activity
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if result code 100
if (resultCode == 100) {
// if result code 100 is received
// means user edited/deleted product
// reload this screen again
Intent intent = getIntent();
finish();
startActivity(intent);
}
}
class LoadAllProducts extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Loading products. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Products: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
products = json.getJSONArray(TAG_PRODUCTS);
// looping through All Products
for (int i = 0; i < products.length(); i++) {
JSONObject c = products.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_PID);
String name = c.getString(TAG_NAME);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_PID, id);
map.put(TAG_NAME, name);
// adding HashList to ArrayList
productsList.add(map);
}
} else {
// no products found
// Launch Add New product Activity
Intent i = new Intent(getApplicationContext(),
MainActivity.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
mListView = (ListView) findViewById(R.id.listView1);
ListAdapter adapter = new SimpleAdapter(MainActivity.this, productsList, R.layout.pat,
new String[] { "name" },new int[]{R.id.textView1});
mListView.setAdapter(adapter);
}
});
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
我的 JSONParser 类是:
package com.toloee.iman.haminjuri;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
我的 xml 文件是:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="50dp">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_gravity="center_horizontal">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="@+id/textView1" />
</LinearLayout>
</LinearLayout>
和 logcat 消息是:
08-29 19:54:32.600 2670-2700/com.toloee.iman.haminjuri W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xb4b636a0, error=EGL_SUCCESS
08-29 19:54:33.534 2670-2700/com.toloee.iman.haminjuri W/EGL_emulation﹕ eglSurfaceAttrib not implemented
08-29 19:54:33.534 2670-2700/com.toloee.iman.haminjuri W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xb4b636c0, error=EGL_SUCCESS
08-29 19:54:34.331 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 273 frames! The application may be doing too much work on its main thread.
08-29 19:54:36.834 2670-2683/com.toloee.iman.haminjuri I/art﹕ WaitForGcToComplete blocked for 3.877s for cause Background
08-29 19:54:43.915 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 574 frames! The application may be doing too much work on its main thread.
08-29 19:54:44.455 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 31 frames! The application may be doing too much work on its main thread.
08-29 19:54:46.713 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 99 frames! The application may be doing too much work on its main thread.
08-29 19:55:12.091 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 3.364s
08-29 19:55:12.222 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 219 frames! The application may be doing too much work on its main thread.
08-29 19:55:12.261 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 5.925ms
08-29 19:55:12.469 2670-2683/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 287.832ms
08-29 19:55:12.887 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 59.246ms
08-29 19:55:12.939 2670-2683/com.toloee.iman.haminjuri I/art﹕ Background partial concurrent mark sweep GC freed 2501(179KB) AllocSpace objects, 0(0B) LOS objects, 50% free, 1010KB/2034KB, paused 348.793ms total 1.675s
08-29 19:55:12.966 2670-2683/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 25.646ms
08-29 19:55:15.134 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 314.208ms
08-29 19:55:16.398 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 415.793ms
08-29 19:55:16.440 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 39 frames! The application may be doing too much work on its main thread.
08-29 19:55:19.307 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 59 frames! The application may be doing too much work on its main thread.
08-29 19:55:23.624 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 4.156s
08-29 19:55:23.660 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 245 frames! The application may be doing too much work on its main thread.
08-29 19:55:26.533 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 748.782ms
08-29 19:55:26.620 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 48 frames! The application may be doing too much work on its main thread.
08-29 19:55:27.334 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 38.990ms
08-29 19:55:28.346 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 53.317ms
08-29 19:55:30.468 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 669.074ms
08-29 19:55:30.491 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 50 frames! The application may be doing too much work on its main thread.
08-29 19:55:36.329 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 3.528s
08-29 19:55:36.356 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 212 frames! The application may be doing too much work on its main thread.
08-29 19:55:40.325 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 15.511ms
08-29 19:55:42.490 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 451.030ms
08-29 19:55:42.544 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 30 frames! The application may be doing too much work on its main thread.
08-29 19:55:45.839 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 20.836ms
08-29 19:55:47.179 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 853.861ms
08-29 19:55:47.203 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 49 frames! The application may be doing too much work on its main thread.
08-29 19:55:47.389 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 42.107ms
08-29 19:55:48.371 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 544.762ms
08-29 19:55:48.412 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 39 frames! The application may be doing too much work on its main thread.
08-29 19:55:49.871 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 40.730ms
08-29 19:55:52.031 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 658.185ms
08-29 19:55:52.064 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 45 frames! The application may be doing too much work on its main thread.
08-29 19:55:52.354 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 20.351ms
08-29 19:56:01.493 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 585.534ms
08-29 19:56:02.929 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 15.600ms
08-29 19:56:07.565 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 3.648s
08-29 19:56:07.665 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 231 frames! The application may be doing too much work on its main thread.
08-29 19:56:10.999 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 3.321s
08-29 19:56:11.092 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 204 frames! The application may be doing too much work on its main thread.
08-29 19:56:12.951 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 18.886ms
.
.
.
08-29 19:58:21.394 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 706.848ms
08-29 19:58:21.412 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 48 frames! The application may be doing too much work on its main thread.
08-29 19:58:21.571 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 70.261ms
08-29 19:58:24.129 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 660.466ms
08-29 19:58:24.181 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 43 frames! The application may be doing too much work on its main thread.
08-29 19:58:24.329 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 55.206ms
.
.
.
08-29 19:59:27.915 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 609.916ms
08-29 19:59:27.945 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 41 frames! The application may be doing too much work on its main thread.
08-29 19:59:28.018 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 45.622ms
08-29 19:59:28.590 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 157.007ms
08-29 19:59:34.902 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 72.223ms
08-29 19:59:35.789 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 465.778ms
08-29 19:59:35.797 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 30 frames! The application may be doing too much work on its main thread.
08-29 19:59:41.345 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 19.947ms
08-29 19:59:43.906 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 571.390ms
08-29 19:59:43.923 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 39 frames! The application may be doing too much work on its main thread.
08-29 19:59:44.602 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 256.379ms
08-29 19:59:45.120 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 287.455ms
08-29 19:59:46.196 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 740.985ms
08-29 19:59:46.230 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 55 frames! The application may be doing too much work on its main thread.
08-29 19:59:46.334 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 78.529ms
08-29 19:59:46.388 2670-2683/com.toloee.iman.haminjuri I/art﹕ Background sticky concurrent mark sweep GC freed 8731(384KB) AllocSpace objects, 0(0B) LOS objects, 43% free, 1149KB/2034KB, paused 4.079ms total 1.206s
08-29 19:59:46.457 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 35.072ms
08-29 19:59:46.510 2670-2683/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 34.853ms
08-29 19:59:47.132 2670-2701/com.toloee.iman.haminjuri E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #1
Process: com.toloee.iman.haminjuri, PID: 2670
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:304)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.SecurityException: Permission denied (missing INTERNET permission?)
at java.net.InetAddress.lookupHostByName(InetAddress.java:451)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getAllByName(InetAddress.java:215)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:142)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:169)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:124)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:365)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:560)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:492)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:470)
at com.toloee.iman.haminjuri.JSONParser.makeHttpRequest(JSONParser.java:62)
at com.toloee.iman.haminjuri.MainActivity$LoadAllProducts.doInBackground(MainActivity.java:167)
at com.toloee.iman.haminjuri.MainActivity$LoadAllProducts.doInBackground(MainActivity.java:145)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: android.system.GaiException: android_getaddrinfo failed: EAI_NODATA (No address associated with hostname)
at libcore.io.Posix.android_getaddrinfo(Native Method)
at libcore.io.ForwardingOs.android_getaddrinfo(ForwardingOs.java:55)
at java.net.InetAddress.lookupHostByName(InetAddress.java:438)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getAllByName(InetAddress.java:215)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:142)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:169)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:124)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:365)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:560)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:492)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:470)
at com.toloee.iman.haminjuri.JSONParser.makeHttpRequest(JSONParser.java:62)
at com.toloee.iman.haminjuri.MainActivity$LoadAllProducts.doInBackground(MainActivity.java:167)
at com.toloee.iman.haminjuri.MainActivity$LoadAllProducts.doInBackground(MainActivity.java:145)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: android.system.ErrnoException: android_getaddrinfo failed: EACCES (Permission denied)
at libcore.io.Posix.android_getaddrinfo(Native Method)
at libcore.io.ForwardingOs.android_getaddrinfo(ForwardingOs.java:55)
at java.net.InetAddress.lookupHostByName(InetAddress.java:438)
at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
at java.net.InetAddress.getAllByName(InetAddress.java:215)
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:142)
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:169)
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:124)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:365)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:560)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:492)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:470)
at com.toloee.iman.haminjuri.JSONParser.makeHttpRequest(JSONParser.java:62)
at com.toloee.iman.haminjuri.MainActivity$LoadAllProducts.doInBackground(MainActivity.java:167)
at com.toloee.iman.haminjuri.MainActivity$LoadAllProducts.doInBackground(MainActivity.java:145)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
08-29 19:59:48.852 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 13.437ms
08-29 19:59:57.919 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 42.291ms
08-29 19:59:58.731 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 45 frames! The application may be doing too much work on its main thread.
08-29 20:00:00.275 2670-2670/com.toloee.iman.haminjuri I/Choreographer﹕ Skipped 91 frames! The application may be doing too much work on its main thread.
08-29 20:00:00.391 2670-2678/com.toloee.iman.haminjuri W/art﹕ Suspending all threads took: 20.032ms
最佳答案
您没有互联网权限来发出 HTTP 请求，如下所示:
Caused by: java.lang.SecurityException: Permission denied (missing INTERNET permission?)
要解决此问题，请将以下行添加到 AndroidManifest.xml 中:
<uses-permission android:name="android.permission.INTERNET"/>
就在 <application> 之前标签。
关于java - 通过 Json 从 php 页面读取信息时 Android 应用程序崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32288545/