Android Java创建多个数据库

编辑3：我决定将它们放在单独的文档中，因为这是我今天早上工作时的样子。当我检查数据库时，只有用户被显示，但他们都有几乎相同的代码，除了常数值被改变。Android Java创建多个数据库

修订的logcat：

04-29 02:25:52.236: W/KeyCharacterMap(11342): No keyboard for id 0 
04-29 02:25:52.236: W/KeyCharacterMap(11342): Using default keymap: /system/usr/keychars/qwerty.kcm.bin 
04-29 02:26:03.816: D/dalvikvm(11342): GC_EXTERNAL_ALLOC freed 1931 objects/121640 bytes in 76ms 
04-29 02:26:03.826: E/Cursor(11342): Finalizing a Cursor that has not been deactivated or closed. database = /data/data/com.gofitness.www/databases/gofit.db, table = users, query = SELECT userid, username, password FROM users 
04-29 02:26:03.826: E/Cursor(11342): android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here 
04-29 02:26:03.826: E/Cursor(11342): at android.database.sqlite.SQLiteCursor.<init>(SQLiteCursor.java:210) 
04-29 02:26:03.826: E/Cursor(11342): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:53) 
04-29 02:26:03.826: E/Cursor(11342): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345) 
04-29 02:26:03.826: E/Cursor(11342): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1229) 
04-29 02:26:03.826: E/Cursor(11342): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1184) 
04-29 02:26:03.826: E/Cursor(11342): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1264) 
04-29 02:26:03.826: E/Cursor(11342): at com.gofitness.www.logindetails.getData(logindetails.java:88) 
04-29 02:26:03.826: E/Cursor(11342): at com.gofitness.www.view.onCreate(view.java:17) 
04-29 02:26:03.826: E/Cursor(11342): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
04-29 02:26:03.826: E/Cursor(11342): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
04-29 02:26:03.826: E/Cursor(11342): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
04-29 02:26:03.826: E/Cursor(11342): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
04-29 02:26:03.826: E/Cursor(11342): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
04-29 02:26:03.826: E/Cursor(11342): at android.os.Handler.dispatchMessage(Handler.java:99) 
04-29 02:26:03.826: E/Cursor(11342): at android.os.Looper.loop(Looper.java:123) 
04-29 02:26:03.826: E/Cursor(11342): at android.app.ActivityThread.main(ActivityThread.java:4627) 
04-29 02:26:03.826: E/Cursor(11342): at java.lang.reflect.Method.invokeNative(Native Method) 
04-29 02:26:03.826: E/Cursor(11342): at java.lang.reflect.Method.invoke(Method.java:521) 
04-29 02:26:03.826: E/Cursor(11342): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
04-29 02:26:03.826: E/Cursor(11342): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
04-29 02:26:03.826: E/Cursor(11342): at dalvik.system.NativeStart.main(Native Method) 
04-29 02:26:03.926: D/dalvikvm(11342): GC_EXTERNAL_ALLOC freed 765 objects/66120 bytes in 61ms 
04-29 02:26:09.915: I/Database(11342): sqlite returned: error code = 1, msg = no such table: Achievements 
04-29 02:26:09.925: E/Database(11342): Error inserting Achievement=tyrenzo 
04-29 02:26:09.925: E/Database(11342): android.database.sqlite.SQLiteException: no such table: Achievements: , while compiling: INSERT INTO Achievements(Achievement) VALUES(?); 
04-29 02:26:09.925: E/Database(11342): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
04-29 02:26:09.925: E/Database(11342): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91) 
04-29 02:26:09.925: E/Database(11342): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64) 
04-29 02:26:09.925: E/Database(11342): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80) 
04-29 02:26:09.925: E/Database(11342): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:36) 
04-29 02:26:09.925: E/Database(11342): at android.database.sqlite.SQLiteDatabase.compileStatement(SQLiteDatabase.java:1145) 
04-29 02:26:09.925: E/Database(11342): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1536) 
04-29 02:26:09.925: E/Database(11342): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1410) 
04-29 02:26:09.925: E/Database(11342): at com.gofitness.www.AddAchievements.createEntry(AddAchievements.java:80) 
04-29 02:26:09.925: E/Database(11342): at com.gofitness.www.Achievements$1.onClick(Achievements.java:41) 
04-29 02:26:09.925: E/Database(11342): at android.view.View.performClick(View.java:2408) 
04-29 02:26:09.925: E/Database(11342): at android.view.View$PerformClick.run(View.java:8816) 
04-29 02:26:09.925: E/Database(11342): at android.os.Handler.handleCallback(Handler.java:587) 
04-29 02:26:09.925: E/Database(11342): at android.os.Handler.dispatchMessage(Handler.java:92) 
04-29 02:26:09.925: E/Database(11342): at android.os.Looper.loop(Looper.java:123) 
04-29 02:26:09.925: E/Database(11342): at android.app.ActivityThread.main(ActivityThread.java:4627) 
04-29 02:26:09.925: E/Database(11342): at java.lang.reflect.Method.invokeNative(Native Method) 
04-29 02:26:09.925: E/Database(11342): at java.lang.reflect.Method.invoke(Method.java:521) 
04-29 02:26:09.925: E/Database(11342): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
04-29 02:26:09.925: E/Database(11342): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
04-29 02:26:09.925: E/Database(11342): at dalvik.system.NativeStart.main(Native Method) 
04-29 02:26:11.776: W/KeyCharacterMap(11342): No keyboard for id 0 
04-29 02:26:11.776: W/KeyCharacterMap(11342): Using default keymap: /system/usr/keychars/qwerty.kcm.bin 
04-29 02:26:14.805: I/Database(11342): sqlite returned: error code = 1, msg = no such table: Achievements 
04-29 02:26:14.805: D/AndroidRuntime(11342): Shutting down VM 
04-29 02:26:14.805: W/dalvikvm(11342): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 
04-29 02:26:14.845: E/AndroidRuntime(11342): FATAL EXCEPTION: main 
04-29 02:26:14.845: E/AndroidRuntime(11342): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gofitness.www/com.gofitness.www.AchievementView}: android.database.sqlite.SQLiteException: no such table: Achievements: , while compiling: SELECT AchievementID, Achievement FROM Achievements 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.os.Handler.dispatchMessage(Handler.java:99) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.os.Looper.loop(Looper.java:123) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.app.ActivityThread.main(ActivityThread.java:4627) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at java.lang.reflect.Method.invokeNative(Native Method) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at java.lang.reflect.Method.invoke(Method.java:521) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at dalvik.system.NativeStart.main(Native Method) 
04-29 02:26:14.845: E/AndroidRuntime(11342): Caused by: android.database.sqlite.SQLiteException: no such table: Achievements: , while compiling: SELECT AchievementID, Achievement FROM Achievements 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:64) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:80) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:46) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:42) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1229) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1184) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1264) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at com.gofitness.www.AddAchievements.getData(AddAchievements.java:88) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at com.gofitness.www.AchievementView.onCreate(AchievementView.java:17) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
04-29 02:26:14.845: E/AndroidRuntime(11342): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
04-29 02:26:14.845: E/AndroidRuntime(11342): ... 11 more

这是AddAchievement.java

package com.gofitness.www; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteDatabase.CursorFactory; 
import android.database.sqlite.SQLiteOpenHelper; 

public class AddAchievements { 

    public static final String KEY_ROWID = "AchievementID"; 
    public static final String KEY_NAME = "Achievement"; 


    private static final String DATABASE_NAME = "gofit.db"; 
    private static final String DATABASE_TABLE = "Achievements"; 
    private static final int DATABASE_VERSION = 1; 


    private DbHelper ourHelper; 
    Context ourContext; 
    private SQLiteDatabase ourDatabase; 

    public class DbHelper extends SQLiteOpenHelper 
    { 





     public DbHelper(Context context, String name, CursorFactory factory, int version) { 
      super(context, DATABASE_NAME, null, DATABASE_VERSION); 
      // TODO Auto-generated constructor stub 
     } 

     @Override 
     public void onCreate(SQLiteDatabase db) { 
      // TODO Auto-generated method stub 
      db.execSQL(
        "CREATE TABLE " + DATABASE_TABLE + "(" + 
      KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + 
          KEY_NAME + " TEXT NOT NULL);" 

        ); 
     } 

     @Override 
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
      // TODO Auto-generated method stub 



        db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE); 
        onCreate(db); 
        } 

    } 
    public AddAchievements(Context c) 
    { 
     ourContext = c; 
    } 

    public AddAchievements open(){ 
     ourHelper = new DbHelper(ourContext, DATABASE_NAME, null, 1); 
     ourDatabase = ourHelper.getWritableDatabase(); 
     return this; 


    } 
    public void close(){ 
    ourHelper.close(); 
    } 

    public long createEntry(String check, String checkpass) { 
     // TODO Auto-generated method stub 
     ContentValues cv = new ContentValues(); 
     cv.put(KEY_NAME,check); 

     return ourDatabase.insert(DATABASE_TABLE,null, cv); 

    } 

    public String getData() { 
     // TODO Auto-generated method stub 

     String[] columns = new String[]{KEY_ROWID, KEY_NAME}; 
     Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null); 
     String result = ""; 
     int iRow = c.getColumnIndex(KEY_ROWID); 
     int iUser = c.getColumnIndex(KEY_NAME); 


     for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ 

     result = result + c.getString(iRow) + " " + c.getString(iUser) +"\n"; 
     } 
     c.close(); 
     return result; 
    } 

    public String getName(String s) { 
     // TODO Auto-generated method stub 
     Cursor c = ourDatabase.rawQuery("SELECT * FROM " + 
       DATABASE_TABLE + 
       " where username = "+ "'"+ s+"'" , null); 

     if (c != null) { 
      c.moveToFirst(); 

       int iUsername = c.getColumnIndex(KEY_NAME); 
        String Name = c.getString(iUsername); 

        c.close(); 
        return Name; 

      } 
     return null; 
    } 


}

这是AddAchievementDB.java

package com.gofitness.www; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteDatabase.CursorFactory; 
import android.database.sqlite.SQLiteOpenHelper; 

public class AddUserAchievementsDB { 

    public static final String KEY_ROWID = "AchievementID"; 
    public static final String KEY_USERID = "user_id"; 
    public static final String KEY_COMPLETED = "Completed"; 


    private static final String DATABASE_NAME = "gofit.db"; 
    private static final String DATABASE_TABLE = "UserAchievementsDB"; 
    private static final int DATABASE_VERSION = 1; 


    private DbHelper ourHelper; 
    Context ourContext; 
    private SQLiteDatabase ourDatabase; 

    private static class DbHelper extends SQLiteOpenHelper 
    { 





     public DbHelper(Context context) { 
      super(context, DATABASE_NAME, null, DATABASE_VERSION); 
      // TODO Auto-generated constructor stub 
     } 

     @Override 
     public void onCreate(SQLiteDatabase dbachievements) { 
      // TODO Auto-generated method stub 
      dbachievements.execSQL(
        "CREATE TABLE " + DATABASE_TABLE + "(" + 
      KEY_ROWID + " INT NOT NULL,"+ 
      KEY_USERID + " INT NOT NULL," + 
      KEY_COMPLETED + " TEXT NOT NULL);" 

        ); 
     } 

     @Override 
     public void onUpgrade(SQLiteDatabase dbachievements, int oldVersion, int newVersion) { 
      // TODO Auto-generated method stub 
      if (oldVersion==2){ 


        dbachievements.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE); 
        onCreate(dbachievements); 
        }} 

    } 
    public AddUserAchievementsDB(Context c) 
    { 
     ourContext = c; 
    } 

    public AddUserAchievementsDB open(){ 
     ourHelper = new DbHelper(ourContext); 
     ourDatabase = ourHelper.getWritableDatabase(); 
     return this; 


    } 
    public void close(){ 
    ourHelper.close(); 
    } 

    public long createEntry(String check, String checkpass, String completedDB) { 
     // TODO Auto-generated method stub 
     ContentValues cv = new ContentValues(); 
     cv.put(KEY_ROWID,check); 
     cv.put(KEY_USERID,checkpass); 
     cv.put(KEY_COMPLETED,completedDB); 

     return ourDatabase.insert(DATABASE_TABLE,null, cv); 

    } 

    public String getData() { 
     // TODO Auto-generated method stub 

     String[] columns = new String[]{KEY_ROWID, KEY_USERID, KEY_COMPLETED}; 
     String sql = "SELECT * FROM UserAchievementsDB INNER JOIN Achievements ON UserAchievementsDB.AchievementID=Achievements.AchievementID WHERE UserAchievementsDB."+KEY_USERID+" = " + Constants.UserID + ";"; 

     Cursor c = ourDatabase.rawQuery(sql, null); 
     String result = ""; 
     int iRow = c.getColumnIndex(KEY_ROWID); 
     int iUser = c.getColumnIndex("username"); 
     int iCompleted = c.getColumnIndex(KEY_COMPLETED); 


     for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ 

     result = result + c.getString(iRow) + " " + c.getString(iUser) + c.getString(iCompleted) + "\n"; 
     } 
     return result; 
    } 

    public String getName(String s) { 
     // TODO Auto-generated method stub 
     Cursor c = ourDatabase.rawQuery("SELECT * FROM " + 
       DATABASE_TABLE + 
       " where username = "+ "'"+ s+"'" , null); 

     if (c != null) { 
      c.moveToFirst(); 

       int iUsername = c.getColumnIndex(KEY_USERID); 
        String Name = c.getString(iUsername); 


        return Name; 

      } 
     return null; 
    } 


}

AddStats.Java

package com.gofitness.www; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteDatabase.CursorFactory; 
import android.database.sqlite.SQLiteOpenHelper; 


public class AddStats { 

    public static final String KEY_ROWID = "userid"; 
    public static final String KEY_NAME = "username"; 
    public static final String KEY_WEIGHT = "weight"; 
    public static final String KEY_HEIGHT = "height"; 
    public static final String KEY_AGE = "age"; 
    public static final String KEY_CALORIES = "calories"; 
    public static final String KEY_PROTEIN = "protein"; 
    public static final String KEY_CARBS = "carbs"; 
    public static final String KEY_FATS = "fats"; 

    private static final String DATABASE_NAME = "gofit.db"; 
    private static final String DATABASE_TABLE = "stats"; 
    private static final int DATABASE_VERSION = 1; 


    private DbHelper ourHelper; 
    Context ourContext; 
    private SQLiteDatabase ourDatabase; 

    private static class DbHelper extends SQLiteOpenHelper 
    { 





     public DbHelper(Context context) { 
      super(context, DATABASE_NAME, null, DATABASE_VERSION); 
      // TODO Auto-generated constructor stub 
     } 

     @Override 
     public void onCreate(SQLiteDatabase dbstats) { 
      // TODO Auto-generated method stub 
      dbstats.execSQL("CREATE TABLE " + DATABASE_TABLE + "(" + 
        KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + 
            KEY_NAME + " TEXT NOT NULL, " + 
        KEY_AGE + " INT NOT NULL, " + 
        KEY_CALORIES + " INT NOT NULL, " + 
        KEY_WEIGHT + " INT NOT NULL, " + 
        KEY_HEIGHT + " INT NOT NULL, " + 
        KEY_PROTEIN + " INT NOT NULL, " + 
        KEY_FATS + " INT NOT NULL, " + 
        KEY_CARBS + " INT NOT NULL);"); 
     } 

     @Override 
     public void onUpgrade(SQLiteDatabase dbstats, int oldVersion, int newVersion) { 
      // TODO Auto-generated method stub 
      if (oldVersion==1){ 

      dbstats.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE); 
      onCreate(dbstats); 
      } 

     } 

    } 
    public AddStats(Context c) 
    { 
     ourContext = c; 
    } 

    public AddStats open(){ 
     ourHelper = new DbHelper(ourContext); 
     ourDatabase = ourHelper.getWritableDatabase(); 
     return this; 


    } 
    public void close(){ 
    ourHelper.close(); 
    } 

    public long createEntry(String usernamevar, String agevar,String weightvar,String heightvar,String caloriesvar, 
      String proteinvar, String carbsvar, String fatvar) { 
     // TODO Auto-generated method stub 
     ContentValues cv = new ContentValues(); 
     cv.put(KEY_NAME,usernamevar); 
     cv.put(KEY_AGE,agevar); 
     cv.put(KEY_WEIGHT,weightvar); 
     cv.put(KEY_HEIGHT,heightvar); 
     cv.put(KEY_CALORIES,caloriesvar); 
     cv.put(KEY_PROTEIN,proteinvar); 
     cv.put(KEY_CARBS,carbsvar); 
     cv.put(KEY_FATS,fatvar); 

     return ourDatabase.insert(DATABASE_TABLE,null, cv); 

    } 

    public String getData() { 
     // TODO Auto-generated method stub 

     String[] columns = new String[]{KEY_ROWID, KEY_NAME, KEY_AGE,KEY_WEIGHT,KEY_HEIGHT, KEY_CALORIES,KEY_PROTEIN,KEY_CARBS,KEY_FATS}; 
     Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null); 
     String result = ""; 
     int iRow = c.getColumnIndex(KEY_ROWID); 
     int iUser = c.getColumnIndex(KEY_NAME); 
     int iAge = c.getColumnIndex(KEY_AGE); 
     int iWeight = c.getColumnIndex(KEY_WEIGHT); 
     int iHeight = c.getColumnIndex(KEY_HEIGHT); 
     int iCalories = c.getColumnIndex(KEY_CALORIES); 
     int iProtein = c.getColumnIndex(KEY_PROTEIN); 
     int iCarb = c.getColumnIndex(KEY_CARBS); 
     int iFat = c.getColumnIndex(KEY_FATS); 

     for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ 

     result = result + c.getString(iRow) + " " + c.getString(iUser) + "\n Age: " + c.getString(iAge) +"\n Weight: "+ c.getString(iWeight)+"\n Height: " 
       + c.getString(iHeight) +"\n Calories: "+ c.getString(iCalories)+"\n Protein: " +c.getString(iProtein)+"\n Carb: " + c.getString(iCarb)+ "\n Fat: "+ c.getString(iFat) +"\n"; 
     } 
     return result; 
    } 

    public String getUser() { 
     // TODO Auto-generated method stub 

     String[] columns = new String[]{KEY_ROWID, KEY_NAME, KEY_AGE,KEY_WEIGHT,KEY_HEIGHT, KEY_CALORIES,KEY_PROTEIN,KEY_CARBS,KEY_FATS}; 
     Cursor c = ourDatabase.rawQuery("SELECT * FROM " + 
       DATABASE_TABLE + 
       " where username = "+ "'"+ Constants.SESSION_NAME+"'" , null); 
     String result = ""; 
     int iRow = c.getColumnIndex(KEY_ROWID); 
     int iUser = c.getColumnIndex(KEY_NAME); 
     int iAge = c.getColumnIndex(KEY_AGE); 
     int iWeight = c.getColumnIndex(KEY_WEIGHT); 
     int iHeight = c.getColumnIndex(KEY_HEIGHT); 
     int iCalories = c.getColumnIndex(KEY_CALORIES); 
     int iProtein = c.getColumnIndex(KEY_PROTEIN); 
     int iCarb = c.getColumnIndex(KEY_CARBS); 
     int iFat = c.getColumnIndex(KEY_FATS); 

     for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ 
      int in = Integer.valueOf(c.getString(iCalories)); 
      int calories = in + 300; 
     result = result + c.getString(iRow) + " " + c.getString(iUser) + "\n Age: " + c.getString(iAge) +"\n Weight: "+ c.getString(iWeight)+"\n Height: " 
       + c.getString(iHeight) +"\n Calories: "+ calories+"\n Protein: " +c.getString(iProtein)+"\n Carb: " + c.getString(iCarb)+ "\n Fat: "+ c.getString(iFat) +"\n"; 
     } 
     return result; 
    } 

}

AddStatsForm.java

package com.gofitness.www; 

import android.app.Activity; 



import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 


public class AddStatsForm extends Activity implements OnClickListener { 

    EditText username, age, weight,height, calories, protein, carbs, fat; 
    TextView success; 
    Button submit; 



    @Override 
    protected void onCreate(Bundle viewInfo) { 
     // TODO Auto-generated method stub 
     super.onCreate(viewInfo); 
     setContentView(R.layout.stats); 

     submit = (Button) findViewById(R.id.bEnter); 
      username = (EditText) findViewById(R.id.etUsername); 
     age = (EditText) findViewById(R.id.etAge); 
     weight = (EditText) findViewById(R.id.etWeight); 
     height = (EditText) findViewById(R.id.etHeight); 
     calories = (EditText) findViewById(R.id.etCalories); 
     protein = (EditText) findViewById(R.id.etProtein); 
     carbs = (EditText) findViewById(R.id.etCarbs); 
      fat = (EditText) findViewById(R.id.etFat); 
      success = (TextView) findViewById(R.id.tvSuccess); 





    submit.setOnClickListener(this); 

    } 

    @Override 
     public void onClick(View view) { 

     boolean diditwork = true; 
      try { 

       String usernamevar = username.getText().toString(); 
       String agevar = age.getText().toString(); 
       String weightvar = weight.getText().toString(); 
       String heightvar = height.getText().toString(); 
       String caloriesvar = calories.getText().toString(); 
       String proteinvar = protein.getText().toString(); 
       String carbsvar = carbs.getText().toString(); 
       String fatvar = fat.getText().toString(); 

       AddStats entry = new AddStats(AddStatsForm.this); 
       entry.open(); 
       entry.createEntry(usernamevar ,agevar, weightvar, heightvar, caloriesvar, proteinvar, carbsvar, fatvar); 
       entry.close(); 
      }catch (Exception e){ 
       diditwork=false; 
       }finally{ 
      if(diditwork){ 
      success.setText("WERKED"); 
      } 
       } 
    }}

来源

2013-04-28 user2171245

具体来说，你的意思是你的表“不工作？我看不到'MyDb'类中的任何方法试图从'users'以外的任何表中检索数据。 – HeatfanJohn 2013-04-28 21:49:36

这些方法存在于不同的类中。但是这些方法不起作用，因为这些表不存在。用户表存在，但是没有其他表存在导致我的应用程序崩溃的表。 – user2171245 2013-04-28 21:57:51

我们可以看到其他类试图访问其他表吗？ – 2013-04-28 22:32:08

我可能是盲目的，但无法找到我的模拟器这个“消灭用户数据”，以检查它是如何工作的。

检查DDMS文件资源管理器目录/data/data/your.app.name/databases 从那里删除所有文件并再次运行应用程序。

您的表格中的名称全部使用小写字母，但在出现错误时使用首字母大写。的表名像你这样的列创建常量和用它们来代替，以避免混乱

//编辑

您提供现在的代码是从以前的完全不一样，这一次就不能正常工作。 DBHelper是所有表格的共同之处，但是您为每个表格单独设置了它们。因为你只有一个表用户，因为这是你首先访问的一个表。

如果您希望将所有表保存在不同的类中您必须将DbHelper类分开，而不是将它们分别作为每个类的内部类。

来源

2013-04-28 23:32:11 Gustek

对不起，我对此很陌生，我听说过DDMS文件资源管理器，但不知道如何使用它，你能解释一下吗？ – user2171245 2013-04-28 23:36:13

此外，“擦除用户数据”从android虚拟设备管理器启动时，与模拟器的大小相同，可以在同一个块中进行选择。感谢所有我感谢帮助！ – user2171245 2013-04-28 23:37:25

[使用DDMS]（http://developer.android.com/tools/debugging/ddms.html） – Gustek 2013-04-28 23:37:38

道歉的曳在，但我认为我看到的根源问题。

AFAICT，SQLiteOpenHelper中的onCreate仅在数据库版本号为CHANGED或db不存在的情况下仅针对一个DBHelper类调用ONLY ONCE;它不会被称为你的每个单独的类，仅仅是第一个被调用的类。从而创建第一个表格，但不创建其他表格。

一（不推荐&不确定是否会工作）解决将是容纳每个表在不同的数据库，然后用 dbname.tablename在SQL来访问它们。

从你的代码，我是你希望使用的整体设计模式有点不确定，所以这剩下的可能有点题外话：

如果你想创建表“根据需要”，如果你放入SQL来检查表是否存在&如果不存在，可能会更好。（效率低但可靠）

/** does table exist? **/ 
private boolean txists(SQLiteDatabase db, String tableName) { 
    Cursor cursor = db.rawQuery("select DISTINCT tbl_name from sqlite_master where tbl_name = '" + tableName + "'", null); 
    if (cursor != null) { 
     if (cursor.getCount() > 0) { 
      cursor.close(); 
      return true; 
     } 
     cursor.close(); 
    } 
    return false; 
}

否则，从我读过的一切，为了一切各种各样的DBHelpers模式似乎是一个单身

private static MYDBHelper dbhelper = null; 
public MYDBHelper getDBHelper(){ 
    if(dbhelper == null){ 
     dbhelper = newInstance(...); 
     ... 
    } 
    return dbhelper; 
}

如果你想实现“可插入”体系结构，在每个类中封装表格规范和创建;考虑从一个DBHelper类中使用的接口和钩子，而不是每个插件类中的一个dbhelper（AddAchievements & AddStats）。最后，您可能需要考虑将ContentProvider作为访问数据的手段（是的，我知道它看起来像一个不必要的抽象和复杂层，但是当您扩展和扩展你的应用程序，特别是在与其他服务交谈时，添加搜索，通知等;它还提供了一个集中的地方来放置你的DBHelper，表格创建等）

来源

2013-04-29 11:24:39 Simon

Android Java创建多个数据库

回答

相关问题