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zu erstellen Ich bin neu bei Android. Ich versuche, Tabelle zu erstellen, einen Datensatz hinzuzufügen und den Datensatz zu überprüfen, der unten angegeben wird. Das Problem besteht darin, dass die Tabelle mit dem Namen TABLE_LOGIN erstellt wird und dass die Überprüfung für die Tabelle funktioniert. Die zweite Tabelle TABLE_REG wird jedoch nicht wie in der Protokolldatei angegeben erstellt.Versuchen, Tabellen mit SQLiteOpenHelper
Database Helper:
package com.intraharyana.tamber.intraharyana;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DatabaseHelper extends SQLiteOpenHelper{
public static final String DATABASE_NAME="NIC.db";
public static final String TABLE_LOGIN ="employee_login";
public static final String LOGIN_COL_1 ="USER_ID";
public static final String LOGIN_COL_2 ="PASSWORD";
public static final String TABLE_REG="employee_info";
public static final String REG_COL_1="SALARY_ACC";
public static final String REG_COL_2="DOB";
public static final String REG_COL_3="DOJ";
public DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, 1);
SQLiteDatabase db=this.getWritableDatabase();
ContentValues contentValues= new ContentValues();
contentValues.put(LOGIN_COL_1, "admin");
contentValues.put(LOGIN_COL_2, "admin");
db.insert(TABLE_LOGIN, null, contentValues);
ContentValues contentValues1= new ContentValues();
contentValues1.put(REG_COL_1, "1234567890");
contentValues1.put(REG_COL_2, "28/01/1994");
contentValues1.put(REG_COL_3, "01/01/2016");
db.insert(TABLE_REG, null, contentValues1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + TABLE_LOGIN + "(USER_ID VARCHAR PRIMARY KEY,PASSWORD TEXT)");
db.execSQL("create table " + TABLE_REG + "(SALARY_ACC VARCHAR PRIMARY KEY,DOB VARCHAR, DOJ VARCHAR)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("drop table if exists "+ TABLE_LOGIN);
db.execSQL("drop table if exists "+ TABLE_REG);
onCreate(db);
}
public Cursor checkLogin(){
SQLiteDatabase db=this.getWritableDatabase();
Cursor cursor=db.rawQuery("select * from "+ TABLE_LOGIN,null);
return cursor;
}
public Cursor checknewReg(){
SQLiteDatabase db=this.getWritableDatabase();
Cursor cursor1= db.rawQuery("select * from "+ TABLE_REG,null);
return cursor1;
}
}`
NewRegister Klasse
package com.intraharyana.tamber.intraharyana;
import android.app.DatePickerDialog;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.app.Activity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.Spinner;
import android.widget.Toast;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;
public class NewRegister extends Activity {
DatabaseHelper mydb;
EditText emp_DOB,emp_DOJ,salaryacc;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.newregister);
emp_DOB=(EditText)findViewById(R.id.emp_DOB);
emp_DOJ=(EditText)findViewById(R.id.emp_DOJ);
salaryacc=(EditText)findViewById(R.id.salaryacc);
mydb=new DatabaseHelper(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void checkReg(View view) {
String salary=salaryacc.getText().toString();
NewRegister ng= new NewRegister();
Cursor c = mydb.checknewReg();
int x=0;
if (c.moveToFirst()) {
do {
if (c.getString(0).equals(salaryacc.getText().toString().toLowerCase())
&& c.getString(1).equals(emp_DOB.getText().toString())
&& c.getString(2).equals(emp_DOJ.getText().toString())) {
Intent i = new Intent(this, NewRegister2.class);
startActivity(i);
finish();
x=1;
}
}
while (c.moveToNext());
if(x==0)
Toast.makeText(this,"Incorrect Credentials...Please Check again",Toast.LENGTH_LONG).show();
}
}
@Override
public void onBackPressed(){
Intent intent=new Intent(this,MainActivity.class);
startActivity(intent);
finish();
}
}
Logcat
03-29 23:48:19.037 21421-21421/com.intraharyana.tamber.intraharyana E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.intraharyana.tamber.intraharyana, PID: 21421
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:4240)
at android.view.View.performClick(View.java:5184)
at android.view.View$PerformClick.run(View.java:20910)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5951)
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:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View$1.onClick(View.java:4235)
at android.view.View.performClick(View.java:5184)
at android.view.View$PerformClick.run(View.java:20910)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5951)
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:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
Caused by: android.database.sqlite.SQLiteException: no such table: employee_info (code 1): , while compiling: select * from employee_info
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1093)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:670)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:59)
at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1440)
at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1379)
at com.intraharyana.tamber.intraharyana.DatabaseHelper.checknewReg(DatabaseHelper.java:54)
at com.intraharyana.tamber.intraharyana.NewRegister.checkReg(NewRegister.java:151)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at android.view.View$1.onClick(View.java:4235)
at android.view.View.performClick(View.java:5184)
at android.view.View$PerformClick.run(View.java:20910)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5951)
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:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
Dank Deinstallation und Neuinstallation funktioniert @BobMalooga –
brauchen einen Vorschlag @BobMalooga. Ich möchte meine App mit Webservices verbinden, die Sie teilen können, von wo aus ich die grundlegenden Funktionen kennen kann? –
Google, Google und Google wieder. Ich denke, es gibt eine halbe Milliarde Ergebnisse ... –