我无法从表单

Question

我正在尝试使用android studio中的databaseHelper从我的应用程序表单创建数据到数据库。但我不断收到错误。当我检查我的logcat时，这是我看到的代码：

  

进程：com.mysite.appName，PID：17995                                                                       java.lang.IllegalStateException：无法执行方法   安卓的onClick                                                                           在android.view.View $ DeclaredOnClickListener.onClick（View.java:4725）                                                                           在android.view.View.performClick（View.java:5637）                                                                           在android.view.View $ PerformClick.run（View.java:22429）                                                                           在android.os.Handler.handleCallback（Handler.java:751）                                                                           在android.os.Handler.dispatchMessage（Handler.java:95）                                                                           在android.os.Looper.loop（Looper.java:154）                                                                           在android.app.ActivityThread.main（ActivityThread.java:6119）                                                                           at java.lang.reflect.Method.invoke（Native Method）                                                                           在   com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:886）                                                                           在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:776）                                                                        引起：java.lang.reflect.InvocationTargetException                                                                           at java.lang.reflect.Method.invoke（Native Method）                                                                           在android.view.View $ DeclaredOnClickListener.onClick（View.java:4720）                                                                           在android.view.View.performClick（View.java:5637）                                                                           在android.view.View $ PerformClick.run（View.java:22429）                                                                           在android.os.Handler.handleCallback（Handler.java:751）                                                                           在android.os.Handler.dispatchMessage（Handler.java:95）                                                                           在android.os.Looper.loop（Looper.java:154）                                                                           在android.app.ActivityThread.main（ActivityThread.java:6119）                                                                           at java.lang.reflect.Method.invoke（Native Method）                                                                           在   com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:886）                                                                           在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:776）                                                                        引起：android.database.sqlite.SQLiteException：靠近“firstName”：   语法错误（代码1）:,编译时：创建表用户（id   整数主键不为null firstName文本不为null，lastName文本   不为空，电子邮件文本不为空，电话文本不为空，密码文本不为空   空值）;                                                                           在   android.database.sqlite.SQLiteConnection.nativePrepareStatement（母语   方法）                                                                           在   android.database.sqlite.SQLiteConnection.acquirePreparedStatement（SQLiteConnection.java:889）

Answer 1

您的问题的答案是在logcat的底部，其中显示Caused by: android.database.sqlite.SQLiteException: near "firstName":

然后继续列出它无法编译的SQL语句：

create table users (id integer primary key not null firstName text not null, lastName text not null, email text not null, phone text not null, password text not null);

在id integer primary key not null之后，您的创建表语句中似乎缺少逗号。