在我的DbHelper类的oCreate中插入记录时,getDatabase以递归方式调用

Question

当我尝试在从SQLiteOpenHelper扩展的我的DbHelper类的onCreate方法中插入记录时,此错误将会增加.
我发现了一些类似的主题:
Android getDatabase被称为递归
getWritableDatabase,递
称调用recursively getDatabase, 但这些对我没有帮助.

public class DbHelper extends SQLiteOpenHelper{

    public int x=0;
    public DbHelper(Context context) {
        super(context, "shareholders.db", null, 1);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        try {
            sql = "CREATE TABLE IF NOT EXISTS settings (name text,value text)";
            Log.d("Ehsan", sql);
            db.execSQL(sql);


        ContentValues cv = new ContentValues();
        cv.put("name", "Username");
        cv.put("value", "");
        insert("settings", cv);

        cv.put("name", "Password");
        cv.put("value", "");
        insert("settings", cv);

        cv.put("name", "PersonId");
        cv.put("value", "");
        insert("settings", cv);
        } catch (Exception e) {
            xLog.error(e.getMessage());
        }
    }


public long insert(String table,ContentValues cv){
    SQLiteDatabase mydb =this.getWritableDatabase();
    return mydb.insert(table,null, cv);
}

    }

当这行代码想要执行时,将引发错误:

insert("settings", cv);

Log Cat:

11-10 11:46:53.325: W/dalvikvm(19579): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
11-10 11:46:53.325: E/AndroidRuntime(19579): FATAL EXCEPTION: main
11-10 11:46:53.325: E/AndroidRuntime(19579): java.lang.IllegalStateException: Could not execute method of the activity
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.view.View$1.onClick(View.java:3599)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.view.View.performClick(View.java:4204)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.view.View$PerformClick.run(View.java:17355)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.os.Handler.handleCallback(Handler.java:725)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.os.Handler.dispatchMessage(Handler.java:92)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.os.Looper.loop(Looper.java:137)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.app.ActivityThread.main(ActivityThread.java:5041)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at java.lang.reflect.Method.invokeNative(Native Method)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at java.lang.reflect.Method.invoke(Method.java:511)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at dalvik.system.NativeStart.main(Native Method)
11-10 11:46:53.325: E/AndroidRuntime(19579): Caused by: java.lang.reflect.InvocationTargetException
11-10 11:46:53.325: E/AndroidRuntime(19579):    at java.lang.reflect.Method.invokeNative(Native Method)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at java.lang.reflect.Method.invoke(Method.java:511)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.view.View$1.onClick(View.java:3594)
11-10 11:46:53.325: E/AndroidRuntime(19579):    ... 11 more
11-10 11:46:53.325: E/AndroidRuntime(19579): Caused by: java.lang.IllegalStateException: getDatabase called recursively
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:204)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at ClassLibrary.DbHelper.insert(DbHelper.java:76)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at ClassLibrary.DbHelper.onCreate(DbHelper.java:56)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:252)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at ClassLibrary.DbHelper.insert(DbHelper.java:76)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at com.example.shareholders.entities.Person.insert(Person.java:99)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at com.example.shareholders.Sync.doSync2(Sync.java:71)
11-10 11:46:53.325: E/AndroidRuntime(19579):    at com.example.shareholders.AppMenu.clickHandler(AppMenu.java:56)
11-10 11:46:53.325: E/AndroidRuntime(19579):    ... 14 more

我该怎么办？

Answer 1

你似乎有一个自定义insert()方法.它可能会调用getWritableDatabase()哪个调用getDatabase(),它将抛出此异常,因为onCreate()已在上下文中调用getDatabase().只需db.insert()直接使用传递给您db的SQLiteDatabase对象onCreate(),无需调用getWritableDatabase().这与您链接的所有三个问题基本上是相同的问题和解决方案.

以前你的问题有另一个先前的问题,解决方案如下,insert()包括上面的修复:

您的表没有您指定的列名ContentValues.

只有name和value列中指定了列,CREATE TABLE settings但您尝试将数据插入列中Username,Password并且personId.

记录完整的异常堆栈跟踪(而不仅仅是消息)以及在您记录它们的任何位置读取异常也很有用.

如果我正确理解您的意图,您需要三个名称 - 值对行,如下所示:

ContentValues cv = new ContentValues();
cv.put("name", "Username");
cv.put("value", "");
db.insert("settings", cv);

cv.clear();
cv.put("name", "Password");
cv.put("value", "");
db.insert("settings", cv);

cv.clear();
cv.put("name", "personId");
cv.put("value", "");
db.insert("settings", cv);

或者包含单行和给定列的表:

sql = "CREATE TABLE IF NOT EXISTS settings (Username text,Password text,personId)";