我正在创建注册表单，并在将数据存储到SQLite时收到错误。我的数据插入MYSql但不插入SQLite。在下面的代码中，您可以在doinbackground中看到函数数据将转到MYSql数据库，但之后它会生成错误而数据不会插入SQLite这是我的注册码。
public class Register_Activity extends Activity {
/*
RadioGroup rg;
RadioButton rb;
int id;*/
private RadioGroup radioSexGroup;
private RadioButton radioSexButton;
private ProgressDialog pDialog;
TextView Fname,Lname,Address,Password,Phone,Email,Gender;
String password,gender;
Button bnt_Submit;
EditText edt_email,edt_password,edt_fname,edt_phone,edt_address,edt_lastName;
JSONObject json;
JSONParser jsonParser = new JSONParser();
//http://www.truzzinfotech.co.nz/admin/public/jsonregister
private static final String KEY_SUCCESS = "success";
//private static final String KEY_ID = "id";
private static final String KEY_FIRSTNAME = "firstname";
private static final String KEY_LASTNAME = "lastname";
private static final String KEY_EMAIL = "email";
private static final String KEY_PHONE = "phone";
//private static final String KEY_UID = "uid";
private static final String KEY_PASSWORD = "password";
private static final String KEY_ADDRESS = "address";
private static final String KEY_GENDER = "gender";
//private static final String KEY_CREATED_AT = "created_at";
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
radioSexGroup = (RadioGroup) findViewById(R.id.radioSex);
bnt_Submit =(Button)findViewById(R.id.btnsubmit);
edt_email = (EditText)findViewById(R.id.Edt_Email);
edt_password = (EditText)findViewById(R.id.Edt_Password);
edt_lastName = (EditText)findViewById(R.id.Edt_LastName);
edt_fname = (EditText)findViewById(R.id.Edt_Name);
edt_phone = (EditText)findViewById(R.id.Edt_Phone);
edt_address = (EditText)findViewById(R.id.Edt_Address);
Fname = (TextView)findViewById(R.id.fnameError);
Lname = (TextView)findViewById(R.id.lnameError);
Email = (TextView)findViewById(R.id.emailError);
Phone = (TextView)findViewById(R.id.phnError);
Password = (TextView)findViewById(R.id.passError);
Address = (TextView)findViewById(R.id.addError);
Gender = (TextView)findViewById(R.id.genderError);
bnt_Submit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int selectedId = radioSexGroup.getCheckedRadioButtonId();
// find the radiobutton by returned id
radioSexButton = (RadioButton) findViewById(selectedId);
//Toast.makeText(getApplicationContext(),radioSexButton.getText(), Toast.LENGTH_SHORT).show();
new RegisterUser().execute();
}
});
}
class RegisterUser extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pDialog = new ProgressDialog(Register_Activity.this);
pDialog.setMessage("Registering...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
String firstname =edt_fname.getText().toString();
String email =edt_email.getText().toString();
String phone =edt_phone.getText().toString();
String address =edt_address.getText().toString();
String lastname =edt_lastName.getText().toString();
password =edt_password.getText().toString();
gender= radioSexButton.getText().toString();
UserFunctions userFunction = new UserFunctions();
JSONObject json = userFunction.registerUser(firstname, lastname, password, email, phone, address, gender);
Log.d("json ch aa gya", json.toString());
// Log.d("param",params1.toString());
try {
Log.d("try ch aa gya", "try ch aa gya");
if (json.getString(KEY_SUCCESS) != null) {
String res = json.getString(KEY_SUCCESS);
if(Integer.parseInt(res) == 1){
DatabaseHandler db = new DatabaseHandler(getApplicationContext());
JSONObject json_user = json.getJSONObject("detail");
Log.d("json_users ch aa gya", json_user.toString());
// Clear all previous data in database
userFunction.logoutUser(getApplicationContext());
db.addUser(json_user.getString(KEY_FIRSTNAME), json_user.getString(KEY_LASTNAME), json.getString(KEY_EMAIL), json_user.getString(KEY_PHONE), json_user.getString(KEY_ADDRESS), json_user.getString(KEY_GENDER), json_user.getString(KEY_PASSWORD));
Log.d("db.adduser ch aa gya", db.toString());
finish();
} else {
}
}}catch (Exception e) {
// TODO: handle exception
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
try {
JSONObject c = json.getJSONObject("detail");
// phone,email,pass,add,fnam,lnam,gen
JSONArray phone = c.optJSONArray("phone");
JSONArray email = c.optJSONArray("email");
JSONArray pass = c.optJSONArray("password");
JSONArray add = c.optJSONArray("address");
JSONArray fnam = c.optJSONArray("firstname");
JSONArray lnam = c.optJSONArray("lastname");
//JSONArray gen = c.optJSONArray("gender");
Log.v("Error", c.toString());
if(fnam != null || edt_fname == null) {
Fname.setText(fnam.getString(0));
}
else{
Fname.setText("");
}
if(lnam != null || edt_lastName == null) {
Lname.setText(lnam.getString(0));
}
else{
Lname.setText("");
}
if(email != null || edt_email == null){
Email.setText(email.getString(0));
}
else{
Email.setText("");
}
if(phone != null || edt_phone == null){
Phone.setText(phone.getString(0));
}
else{
Phone.setText("");
}
if(pass != null || edt_password == null){
Password.setText(pass.getString(0));
}
else{
Password.setText("");
}
if(add != null || edt_address == null){
Address.setText(add.getString(0));
}
else{
Address.setText("");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
这是我在下面的SQlite代码
公共类DatabaseHandler扩展了SQLiteOpenHelper {
// All Static variables
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "restaurant_customer";
// Login table name
private static final String TABLE_LOGIN = "login";
// Login Table Columns names
private static final String KEY_ID = "id";
private static final String KEY_FIRSTNAME = "firstname";
private static final String KEY_LASTNAME = "lastname";
private static final String KEY_EMAIL = "emails";
private static final String KEY_PHONE = "phone";
//private static final String KEY_UID = "uid";
private static final String KEY_PASSWORD = "password";
private static final String KEY_ADDRESS = "address";
private static final String KEY_GENDER = "gender";
//private static final String KEY_CREATED_AT = "created_at";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_LOGIN_TABLE = "CREATE TABLE " + TABLE_LOGIN + "("
+ KEY_ID + " INTEGER PRIMARY KEY,"
+ KEY_FIRSTNAME + " TEXT,"
+ KEY_LASTNAME + " TEXT,"
+ KEY_PASSWORD + " TEXT,"
+ KEY_EMAIL + " TEXT UNIQUE,"
+ KEY_PHONE + " INTEGER,"
+ KEY_ADDRESS + " TEXT,"
+ KEY_GENDER + " TEXT," + ")";
db.execSQL(CREATE_LOGIN_TABLE);
}
// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_LOGIN);
// Create tables again
onCreate(db);
}
/**
* Storing user details in database
* */
public void addUser(String firstname, String lastname, String password, String emails, String phone, String address, String gender, String uid, String created_at) {
Log.d("param","add user ch aa gya");
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_FIRSTNAME, firstname); // FIRST Name
values.put(KEY_LASTNAME, lastname);
values.put(KEY_EMAIL, emails); // Email
//values.put(KEY_UID, uid); // Uid
values.put(KEY_PHONE, phone); // Phone
values.put(KEY_ADDRESS, address); // Address
values.put(KEY_GENDER, gender); // Gender
values.put(KEY_PASSWORD, password); // Password
Log.d("values",values.toString());
//values.put(KEY_CREATED_AT, created_at); // Created At
// Inserting Row
db.insert(TABLE_LOGIN, null, values);
db.close(); // Closing database connection
}
/**
* Getting user data from database
* */
public HashMap<String, String> getUserDetails(){
HashMap<String,String> user = new HashMap<String,String>();
String selectQuery = "SELECT * FROM " + TABLE_LOGIN;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// Move to first row
cursor.moveToFirst();
if(cursor.getCount() > 0){
user.put("firstname", cursor.getString(1));
user.put("lastname", cursor.getString(2));
user.put("email", cursor.getString(3));
//user.put("uid", cursor.getString(4));
//user.put("created_at", cursor.getString(5));
user.put("phone", cursor.getString(6));
user.put("password", cursor.getString(7));
user.put("address", cursor.getString(8));
user.put("gender", cursor.getString(9));
//user.put("phone", cursor.getString(10));
Log.d("user",user.toString());
}
cursor.close();
db.close();
// return user
return user;
}
/**
* Getting user login status
* return true if rows are there in table
* */
public int getRowCount() {
String countQuery = "SELECT * FROM " + TABLE_LOGIN;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
int rowCount = cursor.getCount();
db.close();
cursor.close();
// return row count
return rowCount;
}
/**
* Re crate database
* Delete all tables and create them again
* */
public void resetTables(){
SQLiteDatabase db = this.getWritableDatabase();
// Delete All Rows
db.delete(TABLE_LOGIN, null, null);
db.close();
}
public void addUser(String string, String string2, String string3,
String string4, String string5, String string6, String string7) {
// TODO Auto-generated method stub
}
}
Logcat错误
12-26 13:05:00.386: D/dalvikvm(671): GC_FOR_ALLOC freed 104K, 4% free 11838K/12231K, paused 46ms,
total 67ms
12-26 13:05:00.396: I/dalvikvm-heap(671): Grow heap (frag case) to 11.857MB for 279056-byte allocation
12-26 13:05:00.516: D/dalvikvm(671): GC_FOR_ALLOC freed 7K, 4% free 12103K/12551K, paused 104ms, total 104ms
12-26 13:05:00.686: D/jayant(671): jayant
12-26 13:05:00.686: D/param(671): [firstname=tom, lastname=johnson, password=tomcatvideo, email=tom@gmail.com, phone=987654321, address=demo, gender=Male]
12-26 13:05:03.437: I/Choreographer(671): Skipped 44 frames! The application may be doing too much work on its main thread.
12-26 13:05:06.406: E/JSON(671): {"detail":{"firstname":"tom","lastname":"johnson","gender":"Male","phone":"987654321","address":"demo"},"success":1}
12-26 13:05:06.646: D/getJSONFromUrl(671): {"success":1,"detail":{"gender":"Male","lastname":"johnson","phone":"987654321","firstname":"tom","address":"demo"}}
12-26 13:05:06.836: D/json ch aa gya(671): {"success":1,"detail":{"gender":"Male","lastname":"johnson","phone":"987654321","firstname":"tom","address":"demo"}}
12-26 13:05:06.836: D/try ch aa gya(671): try ch aa gya
12-26 13:05:06.985: D/json_users ch aa gya(671): {"gender":"Male","lastname":"johnson","phone":"987654321","firstname":"tom","address":"demo"}
12-26 13:05:08.096: D/AndroidRuntime(671): Shutting down VM
12-26 13:05:08.096: W/dalvikvm(671): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
12-26 13:05:08.275: E/AndroidRuntime(671): FATAL EXCEPTION: main
12-26 13:05:08.275: E/AndroidRuntime(671): java.lang.NullPointerException
12-26 13:05:08.275: E/AndroidRuntime(671): at app.restaurant.Register_Activity$RegisterUser.onPostExecute(Register_Activity.java:209)
12-26 13:05:08.275: E/AndroidRuntime(671): at app.restaurant.Register_Activity$RegisterUser.onPostExecute(Register_Activity.java:1)
12-26 13:05:08.275: E/AndroidRuntime(671): at android.os.AsyncTask.finish(AsyncTask.java:631)
12-26 13:05:08.275: E/AndroidRuntime(671): at android.os.AsyncTask.access$600(AsyncTask.java:177)
12-26 13:05:08.275: E/AndroidRuntime(671): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
12-26 13:05:08.275: E/AndroidRuntime(671): at android.os.Handler.dispatchMessage(Handler.java:99)
12-26 13:05:08.275: E/AndroidRuntime(671): at android.os.Looper.loop(Looper.java:137)
12-26 13:05:08.275: E/AndroidRuntime(671): at android.app.ActivityThread.main(ActivityThread.java:4745)
12-26 13:05:08.275: E/AndroidRuntime(671): at java.lang.reflect.Method.invokeNative(Native Method)
12-26 13:05:08.275: E/AndroidRuntime(671): at java.lang.reflect.Method.invoke(Method.java:511)
12-26 13:05:08.275: E/AndroidRuntime(671): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-26 13:05:08.275: E/AndroidRuntime(671): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-26 13:05:08.275: E/AndroidRuntime(671): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：1)
private static final String DATABASE_NAME =＆＃34; restaurant.db＆＃34 ;;
答案 1 :(得分：0)
json中的onPostExecute()变量为空。您在doInBackground()分配了该名称的本地变量，以及您从未分配给Register_Activity中该名称的其他类级别变量。
通常，像这样的NPE相对容易弄清楚，例如在调试器中单步执行时。