CursorWindowAllocationException

[zengjingfang]

android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed.
at android.database.CursorWindow.(CursorWindow.java:104)
at android.database.CursorWindow.(CursorWindow.java:126)
at net.sqlcipher.CursorWindow.(CursorWindow.java:54)
at net.sqlcipher.database.SQLiteCursor.fillWindow(SQLiteCursor.java:288)
at net.sqlcipher.database.SQLiteCursor.getCount(SQLiteCursor.java:280)
at net.sqlcipher.AbstractCursor.moveToPosition(AbstractCursor.java:178)
at net.sqlcipher.AbstractCursor.moveToFirst(AbstractCursor.java:222)
at android.database.CursorWrapper.moveToFirst(CursorWrapper.java:65)
at com.j256.ormlite.sqlcipher.android.AndroidCompiledStatement.getCursor(AndroidCompiledStatement.java:181)
at com.j256.ormlite.sqlcipher.android.AndroidCompiledStatement.runQuery(AndroidCompiledStatement.java:65)
at com.j256.ormlite.stmt.SelectIterator.(SelectIterator.java:55)
at com.j256.ormlite.stmt.StatementExecutor.buildIterator(StatementExecutor.java:247)
at com.j256.ormlite.stmt.StatementExecutor.query(StatementExecutor.java:196)
at com.j256.ormlite.dao.BaseDaoImpl.query(BaseDaoImpl.java:265)
at com.j256.ormlite.stmt.QueryBuilder.query(QueryBuilder.java:361)

[zengjingfang]

一、源码追踪

public CursorWindow(String name) {
    mStartPos = 0;
    mName = name != null && name.length() != 0 ? name : "<unnamed>";
    if (sCursorWindowSize < 0) {
        /** The cursor window size. resource xml file specifies the value in kB.
         * convert it to bytes here by multiplying with 1024.
         */
        sCursorWindowSize = Resources.getSystem().getInteger(
            com.android.internal.R.integer.config_cursorWindowSize) * 1024;
    }
    mWindowPtr = nativeCreate(mName, sCursorWindowSize);
    if (mWindowPtr == 0) {
        // 异常抛出的地方
        throw new CursorWindowAllocationException("Cursor window allocation of " +
                (sCursorWindowSize / 1024) + " kb failed. " + printStats());
    }
    mCloseGuard.open("close");
    recordNewWindow(Binder.getCallingPid(), mWindowPtr);
}

  // 创建表CursorWindow
  private static native long nativeCreate(String name, int cursorWindowSize);

应该就是系统调用 nativeCreate 方法时存在问题，导致了抛出该异常。