java 安卓应用程序出现注册错误
我正在使用Android Studio开发一个注册应用程序，但是一旦用户尝试注册该应用程序，就会显示注册错误，LogCat不会给出任何错误
用户数据被输入数据库，但它不允许用户进入下一个活动，因为它说“注册时出错”。请问你能帮忙或提供建议吗
当进一步调试应用程序时，我发现username返回一个空值，而所有其他字段（如fname、sname、email和password）都给出了一个值。您能告诉我为什么username返回的是空值而不是值吗
LogCat
{"tag":"register","success":1,"error":0,"user":{"fname":"Cat","lname":"Slater","email":"catslater@btinternet.com","uname":"catslater","uid":"569e1fc18103c2.33284778","created_at":"2016-01-19 11:36:33"}}
01-19 11:32:25.470 24404-24418/? E/Buffer Error: Error converting result org.json.JSONException: Value 2016-01-19 of type java.lang.String cannot be converted to JSONObject
登记。爪哇
UserFunctions userFunction = new UserFunctions();
JSONObject json = userFunction.registerUser(fname, lname, email, uname, password);
return json;
}
@Override
protected void onPostExecute(JSONObject json) {
try {
if (json.getString(KEY_SUCCESS) != null) {
registerErrorMsg.setText("");
String res = json.getString(KEY_SUCCESS);
String red = json.getString(KEY_ERROR);
if(Integer.parseInt(res) == 1){
pDialog.setTitle("Getting Data");
pDialog.setMessage("Loading Info");
registerErrorMsg.setText("Successfully Registered");
DatabaseHandler db = new DatabaseHandler(getApplicationContext());
JSONObject json_user = json.getJSONObject("user");
/**
* Removes all the previous data in the SQlite database
**/
UserFunctions logout = new UserFunctions();
logout.logoutUser(getApplicationContext());
db.addUser(json_user.getString(KEY_FIRSTNAME),json_user.getString(KEY_LASTNAME),json_user.getString(KEY_EMAIL),json_user.getString(KEY_USERNAME),json_user.getString(KEY_UID),json_user.getString(KEY_CREATED_AT));
/**
* Stores registered data in SQlite Database
* Launch Registered screen
**/
Intent registered = new Intent(getApplicationContext(), Registered.class);
/**
* Close all views before launching Registered screen
**/
registered.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
pDialog.dismiss();
startActivity(registered);
finish();
}
else if (Integer.parseInt(red) ==2){
pDialog.dismiss();
registerErrorMsg.setText("User already exists");
}
else if (Integer.parseInt(red) ==3){
pDialog.dismiss();
registerErrorMsg.setText("Invalid Email id");
}
}
else{
pDialog.dismiss();
registerErrorMsg.setText("Error occurred in registration");
}
} catch (JSONException e) {
e.printStackTrace();
}
}}
public void NetAsync(View view){
new NetCheck().execute();
}}
用户函数。爪哇
//URL of the PHP API
private static String registerURL = "http://10.0.2.2/Register_api/";
private static String register_tag = "register";
/**
* Function to Register
**/
public JSONObject registerUser(String fname, String lname, String email, String uname, String password){
// Building Parameters
List params = new ArrayList();
params.add(new BasicNameValuePair("tag", register_tag));
params.add(new BasicNameValuePair("fname", fname));
params.add(new BasicNameValuePair("lname", lname));
params.add(new BasicNameValuePair("email", email));
params.add(new BasicNameValuePair("uname", uname));
params.add(new BasicNameValuePair("password", password));
JSONObject json = jsonParser.getJSONFromUrl(registerURL,params);
return json;
}
数据库处理程序。爪哇
public class DatabaseHandler extends SQLiteOpenHelper {
// All Static variables
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "cloud_contacts";
// 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 = "fname";
private static final String KEY_LASTNAME = "lname";
private static final String KEY_EMAIL = "email";
private static final String KEY_USERNAME = "uname";
private static final String KEY_UID = "uid";
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_EMAIL + " TEXT UNIQUE,"
+ KEY_USERNAME + " TEXT,"
+ KEY_UID + " TEXT,"
+ KEY_CREATED_AT + " 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 fname, String lname, String email, String uname, String uid, String created_at) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_FIRSTNAME, fname); // FirstName
values.put(KEY_LASTNAME, lname); // LastName
values.put(KEY_EMAIL, email); // Email
values.put(KEY_USERNAME, uname); // UserName
values.put(KEY_UID, uid); // Email
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("fname", cursor.getString(1));
user.put("lname", cursor.getString(2));
user.put("email", cursor.getString(3));
user.put("uname", cursor.getString(4));
user.put("uid", cursor.getString(5));
user.put("created_at", cursor.getString(6));
}
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();
}
}
我通过添加断点并在Android Studio中使用调试器对此进行了调试，这表明用户名字段没有给出值。你能帮助我吗？我怎样才能让username给一个值而不是什么都不给
调试器结果
Firstname Value
result = {EditText@831697172568} "安卓.widget.EditText{5281dc2c VFED..CL ........ 48,498-1032,642 #7f0c00b9 app:id/fname}"
mTransformed = {ReplacementTransformationMethod$SpannedReplacementCharSequence@831697185952} "Sam"
mSpanned = {SpannableStringBuilder@831697185800} "Sam"
mTransformation = {SingleLineTransformationMethod@831697174928}
mText = {SpannableStringBuilder@831697185800} "Sam"
姓氏值
result = {EditText@831697113576} "安卓.widget.EditText{528168f4 VFED..CL ........ 48,642-1032,786 #7f0c00ba app:id/lname}"
mTransformed = {ReplacementTransformationMethod$SpannedReplacementCharSequence@831697116000} "Jones"
mSpanned = {SpannableStringBuilder@831697115808} "Jones"
mTransformation = {SingleLineTransformationMethod@831697174928}
mText = {SpannableStringBuilder@831697115808} "Jones"
用户名值
result = {EditText@831697175208} "安卓.widget.EditText{5281e154 VFED..CL ........ 48,786-1032,906 #7f0c00bb app:id/uname}"
mTransformed = {SpannableStringBuilder@831697129800} "joness"
mTransformation = null
mText = {SpannableStringBuilder@831697129800} "joness"
电子邮件价值
result = {EditText@831697196680} "安卓.widget.EditText{52820b44 VFED..CL .F...... 48,906-1032,1050 #7f0c0084 app:id/email}"
mTransformed = {ReplacementTransformationMethod$SpannedReplacementCharSequence@831697200904} "samjones@gmail.com"
mSpanned = {SpannableStringBuilder@831697200712} "samjones@gmail.com"
mTransformation = {SingleLineTransformationMethod@831697174928}
mText = {SpannableStringBuilder@831697200712} "samjones@gmail.com"
密码值
result = {EditText@831697157912} "安卓.widget.EditText{5281bf8c VFED..CL ........ 48,1050-1032,1194 #7f0c0085 app:id/pword}"
mTransformed = {PasswordTransformationMethod$PasswordCharSequence@831697164432} "••••••••"
mTransformation = {PasswordTransformationMethod@831697161672}
mText = {SpannableStringBuilder@831697164112} "Password"
MTTransformation=null为usernmae字段返回null，但为其他字段返回方法和值。请帮忙
共 (0) 个答案