Question

我在代码中没有任何错误，但是当我运行应用程序时，它会崩溃。这是日志的图片。 http://postimg.org/image/bbcovjovn/我无法弄清楚代码中的错误。

MyBowlingScoresApplication.java

import java.util.ArrayList;

import android.app.Application;
import android.database.sqlite.SQLiteDatabase;

public class MyBowlingScoresApplication extends Application {

    private ArrayList<BowlingScores> allBowlingScores;
private SQLiteDatabase bowlingScoresDB;
    @Override
    public void onCreate() {
        super.onCreate();

        BowlingScoresDatabaseHelper databaseHelper1 = new BowlingScoresDatabaseHelper(this);


        bowlingScoresDB = databaseHelper1.getWritableDatabase();

        //TODO get the data out of the database
        allBowlingScores = new ArrayList<BowlingScores>();  
    }

    public void addBowlingScores(BowlingScores bowlingScores){
        assert bowlingScores != null;

        allBowlingScores.add(bowlingScores);
    }

    public ArrayList<BowlingScores> getAllBowlingScores() {
        return allBowlingScores;
    }

    private void setAllBowlingScores(ArrayList<BowlingScores> allBowlingScores) {
        this.allBowlingScores = allBowlingScores;
    }


}

BowlingScoresDatabaseHelper.java

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class BowlingScoresDatabaseHelper extends SQLiteOpenHelper {



public static final int DB_VERSION = 1; 
public static final String DB_NAME = "MyBowlingScores.SQLite";
public static String BOWLING_SCORES_TABLE="BowlingScoresTable";
public static String RECORD_ID="ID";
public static String DATE = "Date";
public static String GAME1 = "Game1";
public static String GAME2 = "Game2";
public static String GAME3 = "Game3";



    public BowlingScoresDatabaseHelper(Context context) {
        super(context, DB_NAME, null, DB_VERSION);

    }

    @Override
    public void onCreate(SQLiteDatabase bowlingScoresDB) {
    String sqlStatement = "create table " + BOWLING_SCORES_TABLE
            + " ("
            + RECORD_ID + " integer primary key autoincrement not null,"
            + DATE + " integer,"
            + GAME1 + " integer,"
            + GAME2 + " integer,"
            + GAME3 + " integer,"
            + ");";


Log.d("Bowling Database", sqlStatement);

    bowlingScoresDB.execSQL(sqlStatement);

    }

    @Override
    public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
        // TODO Auto-generated method stub

    }

}

Answer 1

SQLite查询的语法错误：

create tableBowlingScoresTable...

应该是这样的：

create table BowlingScoresTable...

忘了空间？

编辑：

好的，你现在提供了代码。我能看到的另一个语法错误是：

+ GAME3 + " integer,"由于跟随)，最后不应该有逗号。

Answer 2

我建议getting familiar with Android's wide set of debugging tools。通过检查Logcat中的堆栈跟踪，或者在连接调试器时发生崩溃时查看调用层次结构，您可以轻松查明问题的原因。

堆栈跟踪清楚地说明了用于创建表的SQL语句包含无效语法。我发现了两个问题：

“创建表格”之后缺少空格，
最后一列定义后的意外逗号。

Android应用程序在启动运行时异常时崩溃

2 个答案: