Robiłem wszystko wg tego tutoriala How to connect Android with PHP, MySQL
W końcu, ściągnąłem źródła i skopiowałem 1:1.
Aplikacja działa (działa dodawanie produktu do bazy danych i wyświetlanie wszystkich produktów) do momentu, kiedy chcę wyświetlić szczegółowe dane produktu.
Po kliknięciu aplikacja się wyłącza, w zakładce DEBUG dostaję takie komunikaty:
<VM does not provide monitor information>
DefaultRequestDirector.execute(HttpHost, HttpRequest, HttpContext) line: 531
DefaultHttpClient(AbstractHttpClient).execute(HttpHost, HttpRequest, HttpContext) line: 555
DefaultHttpClient(AbstractHttpClient).execute(HttpUriRequest, HttpContext) line: 487
DefaultHttpClient(AbstractHttpClient).execute(HttpUriRequest) line: 465
JSONParser.makeHttpRequest(String, String, List) line: 62
EditProductActivity$GetProductDetails$1.run() line: 131
Handler.handleCallback(Message) line: 725
Handler.dispatchMessage(Message) line: 92
Looper.loop() line: 137
ActivityThread.main(String[]) line: 5041
Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method]
Method.invoke(Object, Object...) line: 511
ZygoteInit$MethodAndArgsCaller.run() line: 793
ZygoteInit.main(String[]) line: 560
NativeStart.main(String[]) line: not available [native method]
Jest to mój jeden z pierwszych kontaktów z JAVA, programuję w PHP i tam kiedy dostaję błąd, jest wszystko jasno opisane.
Tutaj dostaję 20 błędów i nawet nie wiem na który ja mogę mieć wpływ. Jak debugować w ogóle aplikacje?
Podejrzewam, że błąd bierze się stąd:
JSONParser.makeHttpRequest(String, String, List) line: 62
tylko nie mam pojęcia dlaczego. Parser Eclipse nie pokazuje żadnego błędu. W innej aktywności ta linijka wygląda analogicznie do tej. Jeśli potrzeba więcej informacji, proszę pisać, bo nie wiem co mogłoby pomóc.
Kod aktywności powodującej błąd:
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://192.168.1.3/android_connect/get_product_details.php";
// url to update product
private static final String url_update_product = "http://192.168.1.3/android_connect/update_product.php";
// url to delete product
private static final String url_delete_product = "http://192.168.1.3/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);
// 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();
}
}
}
Zawartość LogCat:
10-21 13:36:22.598: I/ActivityManager(285): START u0 {cmp=com.example.androidhive/.EditProductActivity (has extras)} from pid 1003
10-21 13:36:22.618: E/SoundPool(285): error loading /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.618: W/AudioService(285): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.618: E/SoundPool(285): error loading /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.618: W/AudioService(285): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.618: E/SoundPool(285): error loading /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.618: W/AudioService(285): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.618: E/SoundPool(285): error loading /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.618: W/AudioService(285): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.618: E/SoundPool(285): error loading /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.618: W/AudioService(285): Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
10-21 13:36:22.628: E/SoundPool(285): error loading /system/media/audio/ui/KeypressStandard.ogg
10-21 13:36:22.628: W/AudioService(285): Soundpool could not load file: /system/media/audio/ui/KeypressStandard.ogg
10-21 13:36:22.628: E/SoundPool(285): error loading /system/media/audio/ui/KeypressSpacebar.ogg
10-21 13:36:22.628: W/AudioService(285): Soundpool could not load file: /system/media/audio/ui/KeypressSpacebar.ogg
10-21 13:36:22.628: E/SoundPool(285): error loading /system/media/audio/ui/KeypressDelete.ogg
10-21 13:36:22.628: W/AudioService(285): Soundpool could not load file: /system/media/audio/ui/KeypressDelete.ogg
10-21 13:36:22.628: E/SoundPool(285): error loading /system/media/audio/ui/KeypressReturn.ogg
10-21 13:36:22.628: W/AudioService(285): Soundpool could not load file: /system/media/audio/ui/KeypressReturn.ogg
10-21 13:36:22.628: W/AudioService(285): onLoadSoundEffects(), Error -1 while loading samples
10-21 13:36:22.628: W/WindowManager(285): Screenshot failure taking screenshot for (328x546) to layer 21015
10-21 13:36:23.578: D/AndroidRuntime(1003): Shutting down VM
10-21 13:36:23.608: W/dalvikvm(1003): threadid=1: thread exiting with uncaught exception (group=0x41465700)
10-21 13:36:23.658: E/AndroidRuntime(1003): FATAL EXCEPTION: main
10-21 13:36:23.658: E/AndroidRuntime(1003): android.os.NetworkOnMainThreadException
10-21 13:36:23.658: E/AndroidRuntime(1003): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1133)
10-21 13:36:23.658: E/AndroidRuntime(1003): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
10-21 13:36:23.658: E/AndroidRuntime(1003): at libcore.io.IoBridge.connectErrno(IoBridge.java:127)
10-21 13:36:23.658: E/AndroidRuntime(1003): at libcore.io.IoBridge.connect(IoBridge.java:112)
10-21 13:36:23.658: E/AndroidRuntime(1003): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
10-21 13:36:23.658: E/AndroidRuntime(1003): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
10-21 13:36:23.658: E/AndroidRuntime(1003): at java.net.Socket.connect(Socket.java:842)
10-21 13:36:23.658: E/AndroidRuntime(1003): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
10-21 13:36:23.658: E/AndroidRuntime(1003): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
10-21 13:36:23.658: E/AndroidRuntime(1003): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
10-21 13:36:23.658: E/AndroidRuntime(1003): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
10-21 13:36:23.658: E/AndroidRuntime(1003): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
10-21 13:36:23.658: E/AndroidRuntime(1003): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
10-21 13:36:23.658: E/AndroidRuntime(1003): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
10-21 13:36:23.658: E/AndroidRuntime(1003): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
10-21 13:36:23.658: E/AndroidRuntime(1003): at com.example.androidhive.JSONParser.makeHttpRequest(JSONParser.java:62)
10-21 13:36:23.658: E/AndroidRuntime(1003): at com.example.androidhive.EditProductActivity$GetProductDetails$1.run(EditProductActivity.java:131)
10-21 13:36:23.658: E/AndroidRuntime(1003): at android.os.Handler.handleCallback(Handler.java:730)
10-21 13:36:23.658: E/AndroidRuntime(1003): at android.os.Handler.dispatchMessage(Handler.java:92)
10-21 13:36:23.658: E/AndroidRuntime(1003): at android.os.Looper.loop(Looper.java:137)
10-21 13:36:23.658: E/AndroidRuntime(1003): at android.app.ActivityThread.main(ActivityThread.java:5103)
10-21 13:36:23.658: E/AndroidRuntime(1003): at java.lang.reflect.Method.invokeNative(Native Method)
10-21 13:36:23.658: E/AndroidRuntime(1003): at java.lang.reflect.Method.invoke(Method.java:525)
10-21 13:36:23.658: E/AndroidRuntime(1003): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
10-21 13:36:23.658: E/AndroidRuntime(1003): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-21 13:36:23.658: E/AndroidRuntime(1003): at dalvik.system.NativeStart.main(Native Method)
10-21 13:36:23.770: W/ActivityManager(285): Force finishing activity com.example.androidhive/.EditProductActivity
10-21 13:36:24.118: I/WindowManager(285): Screenshot max retries 4 of Token{41bbc970 ActivityRecord{41b692c8 u0 com.example.androidhive/.EditProductActivity}} appWin=Window{41b51dc8 u0 com.example.androidhive/com.example.androidhive.EditProductActivity} drawState=1
10-21 13:36:24.118: W/WindowManager(285): Screenshot failure taking screenshot for (768x1280) to layer 21025
10-21 13:36:24.132: W/ActivityManager(285): Force finishing activity com.example.androidhive/.AllProductsActivity
10-21 13:36:24.858: I/Choreographer(285): Skipped 41 frames! The application may be doing too much work on its main thread.
10-21 13:36:25.128: W/ActivityManager(285): Activity pause timeout for ActivityRecord{41b692c8 u0 com.example.androidhive/.EditProductActivity}
10-21 13:36:32.668: W/ActivityManager(285): Launch timeout has expired, giving up wake lock!
10-21 13:36:32.668: W/ActivityManager(285): Activity idle timeout for ActivityRecord{41b692c8 u0 com.example.androidhive/.EditProductActivity}
10-21 13:36:35.183: W/ActivityManager(285): Activity idle timeout for ActivityRecord{419a5288 u0 com.example.androidhive/.MainScreenActivity}
10-21 13:36:42.739: W/ActivityManager(285): Activity destroy timeout for ActivityRecord{41b68370 u0 com.example.androidhive/.AllProductsActivity}
10-21 13:36:42.739: W/ActivityManager(285): Activity destroy timeout for ActivityRecord{41b692c8 u0 com.example.androidhive/.EditProductActivity}