我试图在我的Android应用程序中使用PHP将用户输入的数据存储到MySQL数据库中。但只要点击按钮，我就会收到此消息＆＃34;不幸的是，[app]已停止工作。＆＃34;
public class Register extends Activity implements View.OnClickListener {
private EditText userName, userContact, userAddress, userRequest;
private Spinner userStore;
private Button mRegister;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
//php login script
//localhost :
//testing on your device
//put your local ip instead, on windows, run CMD > ipconfig
//or in mac's terminal type ifconfig and look for the ip under en0 or en1
// private static final String LOGIN_URL = "http://xxx.xxx.x.x:1234/webservice/register.php";
//testing on Emulator:
private static final String LOGIN_URL = "http://10.0.2.2/callarocket/register.php";
//testing from a real server:
//private static final String LOGIN_URL = "http://www.yourdomain.com/webservice/register.php";
//ids
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.first_screen);
Spinner dropdown = (Spinner)findViewById(R.id.StoreSpinner);
String[] items = new String[]{"NZ Mamak", "Indo Shop", "NZ Supermarket"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items);
dropdown.setAdapter(adapter);
userName = (EditText)findViewById(R.id.EditName);
userContact = (EditText)findViewById(R.id.EditContact);
userAddress = (EditText)findViewById(R.id.EditAddress);
userStore = (Spinner)findViewById(R.id.StoreSpinner);
userRequest = (EditText)findViewById(R.id.EditRequest);
mRegister = (Button)findViewById(R.id.SubmitButton);
mRegister.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new CreateUser().execute();
}
class CreateUser extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
boolean failure = false;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Register.this);
pDialog.setMessage("Creating Request...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
int success;
String username = userName.getText().toString();
String usercontact = userContact.getText().toString();
String useraddress = userAddress.getText().toString();
String userstore = userStore.getSelectedItem().toString();
String userrequest = userRequest.getText().toString();
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("userName", username));
params.add(new BasicNameValuePair("userContact", usercontact));
params.add(new BasicNameValuePair("userAddress", useraddress));
params.add(new BasicNameValuePair("userStore", userstore));
params.add(new BasicNameValuePair("userRequest", userrequest));
Log.d("request!", "starting");
//Posting user data to script
JSONObject json = jsonParser.makeHttpRequest(
LOGIN_URL, "POST", params);
// full json response
Log.d("Login attempt", json.toString());
// json success element
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("User Created!", json.toString());
finish();
return json.getString(TAG_MESSAGE);
}else{
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} 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();
if (file_url != null){
Toast.makeText(Register.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
这是我的JSONParser代码。
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(final String url) {
// Making HTTP request
try {
// Construct the client and the HTTP request.
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
// Execute the POST request and store the response locally.
HttpResponse httpResponse = httpClient.execute(httpPost);
// Extract data from the response.
HttpEntity httpEntity = httpResponse.getEntity();
// Open an inputStream with the data content.
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
// Create a BufferedReader to parse through the inputStream.
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
// Declare a string builder to help with the parsing.
StringBuilder sb = new StringBuilder();
// Declare a string to store the JSON object data in string form.
String line = null;
// Build the string until null.
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
// Close the input stream.
is.close();
// Convert the string builder data to an actual string.
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// Try to 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 the JSON Object.
return jObj;
}
// 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;
}
}
这是logcat
02-25 11:25:36.224 2445-2460/com.example.user.callarocket D/OpenGLRenderer﹕ Render dirty regions requested: true
02-25 11:25:36.228 2445-2445/com.example.user.callarocket D/﹕ HostConnection::get() New Host Connection established 0xa6c43550, tid 2445
02-25 11:25:36.271 2445-2445/com.example.user.callarocket D/Atlas﹕ Validating map...
02-25 11:25:36.373 2445-2460/com.example.user.callarocket D/﹕ HostConnection::get() New Host Connection established 0xa6c438d0, tid 2460
02-25 11:25:36.423 2445-2460/com.example.user.callarocket I/OpenGLRenderer﹕ Initialized EGL, version 1.4
02-25 11:25:36.457 2445-2460/com.example.user.callarocket D/OpenGLRenderer﹕ Enabling debug mode 0
02-25 11:25:36.500 2445-2460/com.example.user.callarocket W/EGL_emulation﹕ eglSurfaceAttrib not implemented
02-25 11:25:36.500 2445-2460/com.example.user.callarocket W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xae1eb880, error=EGL_SUCCESS
02-25 11:25:48.014 2445-2460/com.example.user.callarocket W/EGL_emulation﹕ eglSurfaceAttrib not implemented
02-25 11:25:48.014 2445-2460/com.example.user.callarocket W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xa5b6d2a0, error=EGL_SUCCESS
02-25 11:25:48.303 2445-2460/com.example.user.callarocket D/OpenGLRenderer﹕ endAllStagingAnimators on 0xa6cb7580 (RippleDrawable) with handle 0xa6c43c60
02-25 11:25:59.147 2445-2465/com.example.user.callarocket D/request!﹕ starting
02-25 11:25:59.207 2445-2460/com.example.user.callarocket W/EGL_emulation﹕ eglSurfaceAttrib not implemented
02-25 11:25:59.207 2445-2460/com.example.user.callarocket W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xae1f3be0, error=EGL_SUCCESS
02-25 11:25:59.281 2445-2465/com.example.user.callarocket E/JSON Parser﹕ Error parsing data org.json.JSONException: Value Posted of type java.lang.String cannot be converted to JSONObject
02-25 11:25:59.299 2445-2465/com.example.user.callarocket E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #1
Process: com.example.user.callarocket, PID: 2445
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$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.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.json.JSONObject.toString()' on a null object reference
at com.example.user.callarocket.Register$CreateUser.doInBackground(Register.java:128)
at com.example.user.callarocket.Register$CreateUser.doInBackground(Register.java:85)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$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)
02-25 11:25:59.599 2445-2460/com.example.user.callarocket W/EGL_emulation﹕ eglSurfaceAttrib not implemented
02-25 11:25:59.599 2445-2460/com.example.user.callarocket W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xae1f3e60, error=EGL_SUCCESS
02-25 11:26:00.172 2445-2445/com.example.user.callarocket E/WindowManager﹕ android.view.WindowLeaked: Activity com.example.user.callarocket.Register has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{2dbde5f6 V.E..... R......D 0,0-1026,348} that was originally added here
at android.view.ViewRootImpl.<init>(ViewRootImpl.java:363)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:261)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
at android.app.Dialog.show(Dialog.java:298)
at com.example.user.callarocket.Register$CreateUser.onPreExecute(Register.java:99)
at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
at android.os.AsyncTask.execute(AsyncTask.java:535)
at com.example.user.callarocket.Register.onClick(Register.java:81)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
在Log.i（＆＃34; DATA＆＃34;，json）之后添加
02-25 12:24:16.222 2750-2765/com.example.user.callarocket D/OpenGLRenderer﹕ Render dirty regions requested: true
02-25 12:24:16.225 2750-2750/com.example.user.callarocket D/﹕ HostConnection::get() New Host Connection established 0xa6c3e550, tid 2750
02-25 12:24:16.259 2750-2750/com.example.user.callarocket D/Atlas﹕ Validating map...
02-25 12:24:16.366 2750-2765/com.example.user.callarocket D/﹕ HostConnection::get() New Host Connection established 0xa6c3e6f0, tid 2765
02-25 12:24:16.405 2750-2765/com.example.user.callarocket I/OpenGLRenderer﹕ Initialized EGL, version 1.4
02-25 12:24:16.433 2750-2765/com.example.user.callarocket D/OpenGLRenderer﹕ Enabling debug mode 0
02-25 12:24:16.462 2750-2765/com.example.user.callarocket W/EGL_emulation﹕ eglSurfaceAttrib not implemented
02-25 12:24:16.462 2750-2765/com.example.user.callarocket W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xa6c118a0, error=EGL_SUCCESS
02-25 12:24:24.841 2750-2765/com.example.user.callarocket W/EGL_emulation﹕ eglSurfaceAttrib not implemented
02-25 12:24:24.842 2750-2765/com.example.user.callarocket W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xa5e39720, error=EGL_SUCCESS
02-25 12:24:25.095 2750-2765/com.example.user.callarocket D/OpenGLRenderer﹕ endAllStagingAnimators on 0xa6cb2580 (RippleDrawable) with handle 0xa6c3eab0
02-25 12:24:33.820 2750-2768/com.example.user.callarocket D/request!﹕ starting
02-25 12:24:33.862 2750-2765/com.example.user.callarocket W/EGL_emulation﹕ eglSurfaceAttrib not implemented
02-25 12:24:33.863 2750-2765/com.example.user.callarocket W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xa5605140, error=EGL_SUCCESS
02-25 12:24:34.027 2750-2768/com.example.user.callarocket E/JSON Parser﹕ Error parsing data org.json.JSONException: Value Posted of type java.lang.String cannot be converted to JSONObject
02-25 12:24:34.028 2750-2768/com.example.user.callarocket E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #1
Process: com.example.user.callarocket, PID: 2750
java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$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.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.json.JSONObject.toString()' on a null object reference
at com.example.user.callarocket.Register$CreateUser.doInBackground(Register.java:128)
at com.example.user.callarocket.Register$CreateUser.doInBackground(Register.java:85)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$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)
02-25 12:24:34.335 2750-2765/com.example.user.callarocket W/EGL_emulation﹕ eglSurfaceAttrib not implemented
02-25 12:24:34.335 2750-2765/com.example.user.callarocket W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xa5af7e00, error=EGL_SUCCESS
02-25 12:24:36.361 2750-2750/com.example.user.callarocket I/Choreographer﹕ Skipped 106 frames! The application may be doing too much work on its main thread.
02-25 12:24:36.754 2750-2750/com.example.user.callarocket E/WindowManager﹕ android.view.WindowLeaked: Activity com.example.user.callarocket.Register has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{2dbde5f6 V.E..... R......D 0,0-1026,348} that was originally added here
at android.view.ViewRootImpl.<init>(ViewRootImpl.java:363)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:261)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
at android.app.Dialog.show(Dialog.java:298)
at com.example.user.callarocket.Register$CreateUser.onPreExecute(Register.java:99)
at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:587)
at android.os.AsyncTask.execute(AsyncTask.java:535)
at com.example.user.callarocket.Register.onClick(Register.java:81)
at android.view.View.performClick(View.java:4756)
at android.view.View$PerformClick.run(View.java:19749)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
答案 0 :(得分：1)
你有问题。
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
new CreateUser().execute();
}
在这里你必须使用点击的按钮。通常我们使用
switch(v.getId())
{
case your button id :
//Button function
}
答案 1 :(得分：0)
您需要使用解析器来解析字符串，然后将其转换为JSONObject，就像这样 -
JSONParser parser = new JSONParser();
Object obj = parser.parse(json);
JSONObject jsonObj = (JSONObject) obj;
return jsonObj;