android.database.sqlite.SQLiteException: unrecognized token: "266_1"

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android.database.sqlite.SQLiteException: unrecognized token: "266_1"

出现上面异常，查看log，发现是sql语句出了问题：

public String getOneFaceFeature(String faceCountId) {
    Cursor cursor = db.rawQuery("select id," + FACE_FEATURE + " from " + TAB_FACE_FEATURE +" where " + FACE_COUNT_ID + " = " + faceCountId, null);

异常信息是不能识别信息。发现查询条件是String类型。而在sql语法中字符串是要加单引号‘’的，否则无法识别。当然int类型就不需要了。

修改如下：

 Cursor cursor = db.rawQuery("select id," + FACE_FEATURE + " from " + TAB_FACE_FEATURE +" where " + FACE_COUNT_ID + " = '" + faceCountId+"' ", null);

问题解决。

同时要注意，单引号和字符串之间不能有空格，否则不是原来的值，会报android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0异常。见我上篇博客。