erreur inattendue arrêté de stockage de zones de texte dans la table de base de données dynamiquement dans android

Question

Je suis nouveau pour le développement d'applications android.J'ai créer un formulaire d'inscription avec nom d'utilisateur, mot de passe, email. ces valeurs doivent être stockées dans la table de base de données sqlite. récupérer les données de la table.

dans login.java J'ai crée la table et insère dynamiquement les valeurs des données du formulaire d'inscription dans la table. Dans databsehelper.java étend la classe databaseopenHelper pour écraser les méthodes oncreate et upgrade.this j'ai utilisé cette classe dans login.java.

Dans display.java Je vais afficher les données dans les détails du registre de succès.

Il n'y a pas d'erreur mais l'erreur sur l'émulateur est arrêtée de manière inattendue. Je mets le code ci-dessous.

login.java

package rt.prj; 

import java.util.Arrays; 
import java.util.Locale; 



import rt.prj.DatabaseHelper; 
import android.app.Activity; 
import android.content.ContentValues; 
import android.content.Intent; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.os.Bundle; 
import android.text.Editable; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 
import android.widget.Toast; 

public class realestatenew extends Activity { 
    /** Called when the activity is first created. */ 
    public static final String DEBUG_TAG = "FullDatabase Log"; 
    public static final int DB_version = 1; 
    //public static final String DB_name = "User.db"; 

    public static final String TABLE_NAME = "tbl_users"; 
    //public static final String TABLE_NAME = "tbl_temp"; 
    //public static final String DB_name = "User_temp"; 
    public static final String DB_name = "User"; 
public static final String CREATE_USER_TABLE = "CREATE TABLE"+TABLE_NAME+"(id INTEGER PRIMARY KEY AUTOINCREMENT, firstname TEXT,lastname TEXT, username TEXT, password TEXT, email TEXT);"; 
public static final String DROP_USER_TABLE = "DROP TABLE tbl_users;"; 
    public DatabaseHelper database_helper; 
    public SQLiteDatabase database; 
    public SQLiteDatabase database_rd; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main1); 


     Button register=(Button)findViewById(R.id.Button01); 

     //private EditText text1; 

     //Registration database creation 
     createDataBase(); 
     register.setOnClickListener(new View.OnClickListener() 
     { 
         @Override 
         public void onClick(View v) { 
           // TODO Auto-generated method stub 

           realestatenew login = new realestatenew(); 

           Toast.makeText(login.getApplicationContext(),"In Helper executin onCreate()", Toast.LENGTH_SHORT).show(); 

           String[] success = insertRecords(); 
           if(success[0].equalsIgnoreCase("1")) 
           { 
             Intent mIntent = new Intent(realestatenew.this,DisplayUser.class); 

             mIntent.putExtra("username",success[1]); 
             mIntent.putExtra("password",success[2]); 
             mIntent.putExtra("email",success[3]); 
             startActivity(mIntent); 
           } 

         } 

       }); 
    } 
    //database create function 
    void createDataBase() 
    { 
     if(Arrays.binarySearch(databaseList(), DB_name)>=0) 
     { 
       deleteDatabase(DB_name); 
     } 

     database_helper = new 
DatabaseHelper(this.getApplicationContext(),DB_name,null,DB_version); 
     //database_helper.onCreate(database); 
     database = database_helper.getWritableDatabase(); 
     database.setLocale(Locale.getDefault()); 
     // Set the locale 

     database.setLockingEnabled(true); 

     database_rd = database_helper.getReadableDatabase(); 

     Toast.makeText(this, "created database", 
Toast.LENGTH_SHORT).show(); 
     /* 
     database = 
openOrCreateDatabase(DB_name,SQLiteDatabase.CREATE_IF_NECESSARY, 
null); 
     database.setLocale(Locale.getDefault()); // Set the locale 
     database.setLockingEnabled(true); // SQLiteDatabase is made 
thread-safe by using locks around critical sections. 
     database.setVersion(1); 

     database.execSQL(CREATE_USER_TABLE); 
     */ 
    } 

    // data insertion 
    String[] insertRecords() 
    { 
      Toast.makeText(this,"In insertrecords", 
Toast.LENGTH_SHORT).show(); 
      //database.openDatabase(DB_name,database.create(factory),ACCESSIBILITY_SERVICE); 
    final EditText username = (EditText) findViewById(R.id.EditText01); 
    final EditText password= (EditText) findViewById(R.id.EditText02); 
    final EditText email= (EditText) findViewById(R.id.EditText04); 
    Long newUserID = 0l; 

    String uname = username.getText().toString(); 
    String pwd = password.getText().toString(); 
    String emailid = email.getText().toString(); 



    ContentValues values = new ContentValues(); 
    values.put("username",uname); 
    values.put("password",pwd); 
    values.put("email",emailid); 

     //StringBuilder info = new StringBuilder(); 
    String[] info = new String[10]; 


    database.beginTransaction(); 
    try 
    { 
      Toast.makeText(this,"Before calling inserting values", 
Toast.LENGTH_SHORT).show(); 
      newUserID = database.insertOrThrow(TABLE_NAME, null, values); 
      Toast.makeText(this,"After calling inserting values", 
Toast.LENGTH_SHORT).show(); 

      info[0] = newUserID.toString(); 
      info[1] = uname; 
      info[2] = pwd; 
      info[3] = emailid; 


      System.out.println(newUserID); 
      Toast.makeText(this, newUserID.toString(), 
Toast.LENGTH_SHORT).show(); 


      Cursor c = database_rd.query(TABLE_NAME, null, null, null, null,null,null); 
      LogCursorInfo(c); 
      c.close(); 

    } 
    catch(Exception e) 
    { 
      //Transaction failed; 
      e.printStackTrace(); 
    } 
    finally 
    { 
      database.endTransaction(); 
      database.close(); 
    } 
    return info; 
    } 

    public void LogCursorInfo(Cursor c) 
    { 
       Log.i(DEBUG_TAG, "*** Cursor Begin *** " + " Results:" + 
c.getCount() + " Columns: " + c.getColumnCount()); 

       // Print column names 
       String rowHeaders = "|| "; 
       for (int i = 0; i < c.getColumnCount(); i++) { 

         rowHeaders = rowHeaders.concat(c.getColumnName(i) +"||"); 
       } 
       Log.i(DEBUG_TAG, "COLUMNS " + rowHeaders); 
       //Integer rows = c.getCount(); 
       //Toast.makeText(this, rows.toString(), 
      // Toast.LENGTH_SHORT).show(); 
       // Print records 
       c.moveToFirst(); 
       while (c.isAfterLast() == false) { 
         String rowResults = "|| "; 
         for (int i = 0; i < c.getColumnCount(); i++) { 
           rowResults = rowResults.concat(c.getString(i) + 
" || "); 
         } 
         Log.i(DEBUG_TAG, "Row " + c.getPosition() + ": " + 
rowResults); 
         Toast.makeText(this, rowResults.toString(), 
Toast.LENGTH_SHORT).show(); 
         //Toast.makeText(this, "In LogCursorInfo", 
// Toast.LENGTH_SHORT).show(); 
         c.moveToNext(); 
       } 
       Log.i(DEBUG_TAG, "*** Cursor End ***"); 
     } 




} 

databasehelper.java

package rt.prj; 

import android.content.Context; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.database.sqlite.SQLiteDatabase.CursorFactory; 
import android.widget.Toast; 

public class DatabaseHelper extends SQLiteOpenHelper 
{ 

      public static final int DB_version = 1; 
      public static final String DB_name = "realestate.db"; 
       public SQLiteDatabase database; 
       public static final String TABLE_NAME = "tbl_users"; 
       //public static final String TABLE_NAME = "tbl_temp"; 
      public static final String CREATE_USER_TABLE = "CREATE TABLE"+TABLE_NAME+"(id INTEGER PRIMARY KEY AUTOINCREMENT, firstname TEXT,lastname TEXT, username TEXT, password TEXT, email TEXT);"; 
      realestatenew login = new realestatenew(); 
      public DatabaseHelper(Context context, String name, CursorFactory 
factory,int version) 
      { 
       super(context, DB_name, factory,DB_version); 
       // TODO Auto-generated constructor stub 
      } 

      public void onCreate(SQLiteDatabase db) 
       { 

       Toast.makeText(login.getApplicationContext(),"In Helper executingonCreate()", Toast.LENGTH_SHORT).show(); 
         // Create the table 
       db.execSQL("DROP TABLE IF EXISTS tbl_users"); 
       db.execSQL(CREATE_USER_TABLE); 

       } 

       @Override 
       public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
         // Housekeeping here. 
         // Implement how "move" your application data during an upgrade of schema versions 
         // There is no ALTER TABLE command in SQLite, so this generally involves 
         // CREATING a new table, moving data if possible, or deleting the old data and starting fresh 
         // Your call. 
         //db.execSQL("DROP TABLE IF EXISTS tbl_users"); 
         //onCreate(database); 
       } 

       @Override 
       public void onOpen(SQLiteDatabase db) { 
         super.onOpen(db); 
       } 
     } 

display.java

package rt.prj; 

//import java.util.Locale; 

import android.app.Activity; 
//import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.os.Bundle; 
import android.util.TypedValue; 
import android.view.View; 
import android.view.ViewGroup.LayoutParams; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
import android.widget.Toast; 
import rt.prj.*; 
public class DisplayUser extends Activity 
{ 
     public void onCreate(Bundle savedInstanceState) 
     { 
       super.onCreate(savedInstanceState); 
       //setContentView(R.layout.userinfo); 


       final String DB_name = "realestate.db"; 
       final String TABLE_NAME = "tbl_users"; 
       final int DB_version = 1; 
       //final DatabaseHelper database_helper; 
       //final SQLiteDatabase database_wr; 


       /* 
       database = 
openOrCreateDatabase(DB_name,SQLiteDatabase.CREATE_IF_NECESSARY, 
null); 
     database.setLocale(Locale.getDefault()); // Set the locale 
     database.setLockingEnabled(true); // SQLiteDatabase is made 
thread-safe by using locks around critical sections. 
     database.setVersion(1); 

     if(database.isOpen()) 
     { 
       Toast.makeText(this, "Yes database is open", 
Toast.LENGTH_SHORT).show(); 
     } 
     if(database.isDbLockedByCurrentThread()) 
     { 
       Toast.makeText(this, "Yes database is locked", 
Toast.LENGTH_SHORT).show(); 
     } 
     Cursor c = database.query(TABLE_NAME, null, null, null, null, 
null,null); 

     LogIn login = new LogIn(); 
     login.LogCursorInfo(c); 
       c.close(); 
       */ 

       //LogIn login = new LogIn(); 
       //database_wr = login.database_helper.getWritableDatabase(); 
       String uname= getIntent().getStringExtra("username"); 
       String pwd= getIntent().getStringExtra("password"); 
       String email= getIntent().getStringExtra("email"); 

       Toast.makeText(this, uname, Toast.LENGTH_SHORT).show(); 

       View infoPanel = _createInfoPanel(uname,pwd,email); 
       setContentView(infoPanel); 


     } 
     public View _createInfoPanel(String uname,String pwd,String 
email) 
     { 
       LinearLayout panel = new LinearLayout(this); 
       panel.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, 
LayoutParams.FILL_PARENT)); 
       panel.setOrientation(LinearLayout.VERTICAL); 

      // user id 
       TextView Welcome = new TextView(this); 
       Welcome.setText("Welcome "+uname); 
       Welcome.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14f); 
       Welcome.setLayoutParams(new 
LayoutParams(LayoutParams.WRAP_CONTENT, 
LayoutParams.WRAP_CONTENT)); 

       TextView UserName = new TextView(this); 
       UserName.setText("Username:"+uname); 
       UserName.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14f); 
       UserName.setLayoutParams(new 
LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); 

       TextView pass = new TextView(this); 
       pass.setText("password:"+pwd); 
       pass.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14f); 
       pass.setLayoutParams(new 
LayoutParams(LayoutParams.WRAP_CONTENT, 
LayoutParams.WRAP_CONTENT)); 

       TextView Email = new TextView(this); 
       Email.setText("E-mailID:"+email); 
       Email.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14f); 
       Email.setLayoutParams(new 
LayoutParams(LayoutParams.WRAP_CONTENT, 
LayoutParams.WRAP_CONTENT)); 


       panel.addView(Welcome); 
       panel.addView(UserName); 
       panel.addView(pass); 
       panel.addView(Email); 
       return panel; 
     } 
} 

Answer 1

Je ne sais pas pourquoi cela i s passe et je ne peux pas vraiment lire le code parce qu'il n'est pas formaté correctement, mais si vous voulez stocker quelque chose d'aussi trivial que certaines chaînes de texte, vous devriez vraiment utiliser SharedPreferences. En utilisant SharedPreferences, vous pouvez stocker et récupérer les données dans environ 5 lignes de code.

final SharedPreferences prefs = context.getSharedPreferences(); 
Editor editor = prefs.edit(); 
editor.putString("email", email); 
editor.putString("username", username); 
editor.putString("password", password); 
editor.commit(); 
email = prefs.getString("email");