应用程序崩溃JSON jparser发出http请求

时间:2014-01-11 12:11:11

标签: php android mysql json crash

您使用本教程连接到Web或本地的mySQL数据库。 here 虽然所有服务器端的php文件都是正确的并且可以在浏览器上运行,但是在Android端,应用程序在这一行崩溃了:

 JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);

有了这条消息:不幸的是app已经停止了!

我在教程页面评论中发现我应该更改apache服务器上的一些设置。 这是我的代码:

public class AllProductsActivity extends ListActivity {

    // Progress Dialog
    private ProgressDialog pDialog;

    // Creating JSON Parser object
    JSONParser jParser = new JSONParser();

    ArrayList<HashMap<String, String>> productsList;

    // url to get all products list
    private static String url_all_products = "http://127.0.0.1/android/get_all_products.php";

    // JSON Node names
    private static final String TAG_SUCCESS = "success";
    private static final String TAG_PRODUCTS = "products";
    private static final String TAG_PID = "pid";
    private static final String TAG_NAME = "name";

    // products JSONArray
    JSONArray products = null;

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

        StrictMode.enableDefaults();

        // Hashmap for ListView
        productsList = new ArrayList<HashMap<String, String>>();

        // Loading products in Background Thread
        new LoadAllProducts().execute();

        // Get listview
        ListView lv = getListView();

        // on seleting single product
        // launching Edit Product Screen
        lv.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // getting values from selected ListItem
                String pid = ((TextView) view.findViewById(R.id.pid)).getText()
                        .toString();

                // Starting new intent
                Intent in = new Intent(getApplicationContext(),
                        EditProductActivity.class);
                // sending pid to next activity
                in.putExtra(TAG_PID, pid);

                // starting new activity and expecting some response back
                startActivityForResult(in, 100);
            }
        });

    }

    // 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);
        }

    }

    /**
     * Background Async Task to Load all product by making HTTP Request
     * */
    class LoadAllProducts extends AsyncTask<String, String, String> {

        /**
         * Before starting background thread Show Progress Dialog
         * */
        @Override
        protected void onPreExecute() {
            super.onPreExecute();

            Log.i("LOG", "load data preexecute");
            pDialog = new ProgressDialog(AllProductsActivity.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) {

            Log.i("LOG", "load data inback ");
            // Building Parameters
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            // getting JSON string from URL
            Log.i("LOG", "load data inback json 1 ");

            JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);


            Log.i("LOG", "load data inback json 2 "+json.toString());

            // Check your log cat for JSON reponse


            try {

                Log.i("LOG", "load data inback json json 3");
                // 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);
                        Log.i("LOG", "load data inback json json 4");
                    }
                } else {
                    Log.i("LOG", "load data inback json json 5");
                    // no products found
                    // Launch Add New product Activity
                    Intent i = new Intent(getApplicationContext(),
                            NewProductActivity.class);
                    // Closing all previous activities
                    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                    startActivity(i);
                }
                Log.i("All Products: ","success:"+ success+"");
            } catch (JSONException e) {
                e.printStackTrace();
                Log.i("LOG", "load data inback json on catch");
            }

            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
                     * */
                    ListAdapter adapter = new SimpleAdapter(
                            AllProductsActivity.this, productsList,
                            R.layout.list_item, new String[] { TAG_PID,
                                    TAG_NAME},
                            new int[] { R.id.pid, R.id.name });
                    // updating listview
                    setListAdapter(adapter);
                }
            });

        }

    }
}

这是log cat:

01-11 13:49:19.163: E/Trace(2045): error opening trace file: No such file or directory (2)
01-11 13:49:19.642: D/gralloc_goldfish(2045): Emulator without GPU emulation detected.
01-11 13:49:26.103: I/LOG(2045): load data preexecute
01-11 13:49:26.583: D/dalvikvm(2045): GC_FOR_ALLOC freed 78K, 3% free 8222K/8391K, paused 155ms, total 170ms
01-11 13:49:26.793: I/LOG(2045): load data inback 
01-11 13:49:26.793: I/LOG(2045): load data inback json 1 
01-11 13:49:27.022: I/Choreographer(2045): Skipped 38 frames!  The application may be doing too much work on its main thread.
01-11 13:49:27.923: W/System.err(2045): org.apache.http.conn.HttpHostConnectException: Connection to http://127.0.0.1 refused
01-11 13:49:27.933: W/System.err(2045):     at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:183)
01-11 13:49:27.933: W/System.err(2045):     at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
01-11 13:49:27.933: W/System.err(2045):     at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
01-11 13:49:27.933: W/System.err(2045):     at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
01-11 13:49:27.933: W/System.err(2045):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
01-11 13:49:27.933: W/System.err(2045):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
01-11 13:49:27.933: W/System.err(2045):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
01-11 13:49:27.933: W/System.err(2045):     at com.mjs.test.phptest92.core.JSONParser.makeHttpRequest(JSONParser.java:61)
01-11 13:49:27.943: W/System.err(2045):     at com.mjs.test.phptest92.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:138)
01-11 13:49:27.943: W/System.err(2045):     at com.mjs.test.phptest92.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:1)
01-11 13:49:27.943: W/System.err(2045):     at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-11 13:49:27.943: W/System.err(2045):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
01-11 13:49:27.943: W/System.err(2045):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
01-11 13:49:27.943: W/System.err(2045):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
01-11 13:49:27.953: W/System.err(2045):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
01-11 13:49:27.953: W/System.err(2045):     at java.lang.Thread.run(Thread.java:856)
01-11 13:49:27.953: W/System.err(2045): Caused by: java.net.ConnectException: failed to connect to /127.0.0.1 (port 80): connect failed: ECONNREFUSED (Connection refused)
01-11 13:49:28.023: W/System.err(2045):     at libcore.io.IoBridge.connect(IoBridge.java:114)
01-11 13:49:28.023: W/System.err(2045):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
01-11 13:49:28.033: W/System.err(2045):     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
01-11 13:49:28.033: W/System.err(2045):     at java.net.Socket.connect(Socket.java:842)
01-11 13:49:28.033: W/System.err(2045):     at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
01-11 13:49:28.033: W/System.err(2045):     at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
01-11 13:49:28.033: W/System.err(2045):     ... 15 more
01-11 13:49:28.033: W/System.err(2045): Caused by: libcore.io.ErrnoException: connect failed: ECONNREFUSED (Connection refused)
01-11 13:49:28.043: W/System.err(2045):     at libcore.io.Posix.connect(Native Method)
01-11 13:49:28.053: W/System.err(2045):     at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:85)
01-11 13:49:28.053: W/System.err(2045):     at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
01-11 13:49:28.053: W/System.err(2045):     at libcore.io.IoBridge.connect(IoBridge.java:112)
01-11 13:49:28.053: W/System.err(2045):     ... 20 more
01-11 13:49:28.053: E/Buffer Error(2045): Error converting result java.lang.NullPointerException
01-11 13:49:28.093: E/JSON Parser(2045): Error parsing data org.json.JSONException: End of input at character 0 of 
01-11 13:49:28.123: W/dalvikvm(2045): threadid=11: thread exiting with uncaught exception (group=0x40a13300)
01-11 13:49:28.143: E/AndroidRuntime(2045): FATAL EXCEPTION: AsyncTask #1
01-11 13:49:28.143: E/AndroidRuntime(2045): java.lang.RuntimeException: An error occured while executing doInBackground()
01-11 13:49:28.143: E/AndroidRuntime(2045):     at android.os.AsyncTask$3.done(AsyncTask.java:299)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at java.lang.Thread.run(Thread.java:856)
01-11 13:49:28.143: E/AndroidRuntime(2045): Caused by: java.lang.NullPointerException
01-11 13:49:28.143: E/AndroidRuntime(2045):     at com.mjs.test.phptest92.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:141)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at com.mjs.test.phptest92.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:1)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-11 13:49:28.143: E/AndroidRuntime(2045):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
01-11 13:49:28.143: E/AndroidRuntime(2045):     ... 4 more
01-11 13:49:28.843: I/Choreographer(2045): Skipped 76 frames!  The application may be doing too much work on its main thread.
01-11 13:49:29.163: I/Choreographer(2045): Skipped 89 frames!  The application may be doing too much work on its main thread.
01-11 13:49:29.713: E/WindowManager(2045): Activity com.mjs.test.phptest92.AllProductsActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@41223f00 that was originally added here
01-11 13:49:29.713: E/WindowManager(2045): android.view.WindowLeaked: Activity com.mjs.test.phptest92.AllProductsActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@41223f00 that was originally added here
01-11 13:49:29.713: E/WindowManager(2045):  at android.view.ViewRootImpl.<init>(ViewRootImpl.java:374)
01-11 13:49:29.713: E/WindowManager(2045):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:292)
01-11 13:49:29.713: E/WindowManager(2045):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:224)
01-11 13:49:29.713: E/WindowManager(2045):  at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:149)
01-11 13:49:29.713: E/WindowManager(2045):  at android.view.Window$LocalWindowManager.addView(Window.java:547)
01-11 13:49:29.713: E/WindowManager(2045):  at android.app.Dialog.show(Dialog.java:277)
01-11 13:49:29.713: E/WindowManager(2045):  at com.mjs.test.phptest92.AllProductsActivity$LoadAllProducts.onPreExecute(AllProductsActivity.java:124)
01-11 13:49:29.713: E/WindowManager(2045):  at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
01-11 13:49:29.713: E/WindowManager(2045):  at android.os.AsyncTask.execute(AsyncTask.java:534)
01-11 13:49:29.713: E/WindowManager(2045):  at com.mjs.test.phptest92.AllProductsActivity.onCreate(AllProductsActivity.java:62)
01-11 13:49:29.713: E/WindowManager(2045):  at android.app.Activity.performCreate(Activity.java:5008)
01-11 13:49:29.713: E/WindowManager(2045):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
01-11 13:49:29.713: E/WindowManager(2045):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
01-11 13:49:29.713: E/WindowManager(2045):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
01-11 13:49:29.713: E/WindowManager(2045):  at android.app.ActivityThread.access$600(ActivityThread.java:130)
01-11 13:49:29.713: E/WindowManager(2045):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
01-11 13:49:29.713: E/WindowManager(2045):  at android.os.Handler.dispatchMessage(Handler.java:99)
01-11 13:49:29.713: E/WindowManager(2045):  at android.os.Looper.loop(Looper.java:137)
01-11 13:49:29.713: E/WindowManager(2045):  at android.app.ActivityThread.main(ActivityThread.java:4745)
01-11 13:49:29.713: E/WindowManager(2045):  at java.lang.reflect.Method.invokeNative(Native Method)
01-11 13:49:29.713: E/WindowManager(2045):  at java.lang.reflect.Method.invoke(Method.java:511)
01-11 13:49:29.713: E/WindowManager(2045):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
01-11 13:49:29.713: E/WindowManager(2045):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
01-11 13:49:29.713: E/WindowManager(2045):  at dalvik.system.NativeStart.main(Native Method)
01-11 13:49:29.713: I/Choreographer(2045): Skipped 32 frames!  The application may be doing too much work on its main thread.

我怎么能解决这个问题?

1 个答案:

答案 0 :(得分:2)

如果您从设备中引用localhost而不是使用http://10.0.2.2:8080/而不是http://127.0.0.1/http://localhost/

因为您的Android模拟器在Virtual Machine(QEMU)上运行,而您无法连接到直接在PC上运行的服务器。

如果您从物理Android设备运行您的应用程序,请从您的PC使用您的网络IP。 例如http://198.10.12.21:80/ ....