Android App wird geschlossen, wenn ich versuche, Daten in die Tabelle mit sqlite

Question

einfügen Ich entwickle eine App, in der ich Daten in die Datenbank einfügen kann. Die Daten werden in die Datenbank eingefügt, wenn ich die Schaltfläche "Hinzufügen" drücke. Aber wenn ich den Hinzufügen-Button drücke, hört die App auf zu arbeiten und geht zurück zur Homepage. Ich füge den Screenshot der Benutzeroberfläche und den Code an.

Dies ist das Datenbankschema Code:

import android.content.ContentValues; 
import android.content.Context; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.provider.BaseColumns; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.database.sqlite.SQLiteOpenHelper; 

public class DB_EVENTS extends SQLiteOpenHelper { 
public static final String db_name="Events.db"; 
public static final String table_name="eventstable"; 
public static final String col="ID"; 
public static final String col1="Event name"; 
public static final String col2="Price "; 
public static final String col3="Date "; 
public static final String col4="Capacity"; 
public static final String col5="Promocode"; 

//String test1=Createevent.msg; 

public DB_EVENTS(Context context) { 
    super(context,db_name, null,1); 
    // SQLiteDatabase db=this.getWritableDatabase(); 
} 

@Override 
public void onCreate(SQLiteDatabase db) { 
    db.execSQL("create table"+table_name+"(ID INTEGER PRIMARY KEY AUTOINCREMENT,NAME TEXT,PRICE TEXT,DATE TEXT,CAPACITY TEXT,PROMOCODE TEXT)"); 
} 

@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    db.execSQL("DROP TABLE IF EXISTS"+ table_name); 
    onCreate(db); 

} 
public boolean insert_data(String name,String price ,String date,String  capacity,String promocode){ 
SQLiteDatabase db=this.getWritableDatabase(); 
ContentValues contentValues=new ContentValues(); 
contentValues.put(col1,name); 
contentValues.put(col2,price); 
contentValues.put(col3,promocode); 
contentValues.put(col4,date); 
contentValues.put(col5,capacity); 

long result=db.insert(table_name,null,contentValues); 
if(result==-1) 
{ 
    return false; 
} 
else{ 
    return true; 
} 
} 

} 

Dies ist die Hauptcodeaktivität:

import android.content.Intent; 
import android.provider.BaseColumns; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.EditText; 
import android.widget.Toast; 


public class Createevent extends AppCompatActivity { 
DB_EVENTS db; 


public static final String msg1 = " "; 
public static final String msg2 = " "; 
public static final String msg3 = " "; 
public static final String msg4 = " "; 
public static final String msg5 = " "; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_createevent); 
    db=new DB_EVENTS(this); 

} 
public void add(View view) 
{ 


    EditText editText1 = (EditText) findViewById(R.id.editText); 
    String message1 = editText1.getText().toString(); 
    EditText editText2 = (EditText) findViewById(R.id.editText3); 
    String message2 = editText2.getText().toString(); 
    EditText editText3 = (EditText) findViewById(R.id.editText4); 
    String message3 = editText3.getText().toString(); 
    EditText editText4 = (EditText) findViewById(R.id.editText5); 
    String message4 = editText4.getText().toString(); 
    EditText editText5 = (EditText) findViewById(R.id.editText6); 
    String message5 = editText5.getText().toString(); 
    boolean isinserted=db.insert_data(message1,message2,message3, 
     message4,message5); 
    if(isinserted==true){ 

    Toast.makeText(Createevent.this,"Data inserted" 
     ,Toast.LENGTH_LONG).show(); 
    } 
    else{Toast.makeText(Createevent.this, 
    "Data not inserted",Toast.LENGTH_LONG).show(); 
    } 



} 

} 


    This is the UI code: 
    [![This is the screenshot of the UI of my app][1]][1] 
    <?xml version="1.0" encoding="utf-8"?> 
    <RelativeLayout xmlns:android= 
    "http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
     android:id="@+id/activity_createevent" 
     android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context="com.example.parth.eventmgmtsystem.Createevent"> 

    <TextView 
    android:text="Fill in the details to create an event" 
    android:layout_width="wrap_content" 
    android:layout_height="30dp" 
    android:id="@+id/textView" 
    android:layout_alignParentStart="true" 
    android:layout_marginStart="24dp" 
    android:layout_alignParentTop="true" /> 

    <TextView 
    android:text="Price" 
    android:layout_width="100dp" 
    android:layout_height="wrap_content" 
    android:layout_below="@+id/editText" 
    android:layout_alignStart="@+id/textView4" 
    android:layout_marginTop="31dp" 
    android:id="@+id/textView5" /> 

    <EditText 
    android:layout_width="wrap_content" 
    android:layout_height="20dp" 
    android:inputType="textPersonName" 
    android:text=" " 
    android:ems="10" 
    android:layout_alignBottom="@+id/textView5" 
    android:layout_toEndOf="@+id/textView5" 
    android:layout_marginStart="36dp" 
    android:id="@+id/editText3" /> 

    <TextView 
    android:text="Date" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_marginTop="39dp" 
    android:id="@+id/textView6" 
    android:layout_below="@+id/textView5" 
    android:layout_alignStart="@+id/textView5" /> 

    <EditText 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:inputType="textPersonName" 
    android:ems="10" 
    android:id="@+id/editText4" 
    android:layout_alignBaseline="@+id/textView6" 
    android:layout_alignBottom="@+id/textView6" 
    android:layout_toEndOf="@+id/textView" /> 

    <Button 
    android:text="ADD" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentBottom="true" 
    android:layout_toEndOf="@+id/textView5" 
    android:layout_marginBottom="13dp" 
    android:id="@+id/button3" 
    android:onClick="add"/> 

    <TextView 
    android:text="Capacity" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/textView7" 
    android:layout_centerVertical="true" /> 

    <TextView 
    android:text="Promocode" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_marginTop="64dp" 
    android:id="@+id/textView8" 
    android:layout_below="@+id/textView7" 
    android:layout_alignParentStart="true" /> 

    <TextView 
    android:text="Enter the name of the event" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/textView3" 
    android:layout_marginTop="15dp" 
    android:layout_below="@+id/textView" 
    android:layout_alignEnd="@+id/button3" 
    android:layout_marginEnd="29dp" /> 

    <EditText 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:inputType="textPersonName" 
    android:ems="10" 
    android:id="@+id/editText" 
    android:layout_alignTop="@+id/textView3" 
    android:layout_alignParentEnd="true" 
    android:layout_toEndOf="@+id/button3" /> 

    <EditText 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:inputType="textPersonName" 
    android:text=" " 
    android:ems="10" 
    android:id="@+id/editText6" 
    android:layout_alignTop="@+id/textView8" 
    android:layout_alignStart="@+id/editText5" /> 

    <EditText 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:inputType="textPersonName" 
    android:ems="10" 
    android:id="@+id/editText5" 
    android:layout_alignTop="@+id/textView7" 
    android:layout_alignStart="@+id/editText3" /> 
    </RelativeLayout> 

Answer 1

Ihre create table es nicht korrekt ist. Die Räume sind nicht korrekt, sollte sein:

db.execSQL("CREATE TABLE "+table_name+" (ID INTEGER PRIMARY KEY AUTOINCREMENT,NAME TEXT,PRICE TEXT,DATE TEXT,CAPACITY TEXT,PROMOCODE TEXT)"); 

Auch die Räume in der Drop-Tabelle:

db.execSQL("DROP TABLE IF EXISTS "+ table_name);