我正在尝试使用来自该站点的 Android SQLite 数据库做一个示例: http : //www.vogella.com/articles/AndroidSQLite/article.html 一切都可能很好。但是当我使用简单的活动时它很好。使用 ListActivity 我有强制关闭错误!不知道该怎么办。请帮忙。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add New"
android:onClick="onClick"/>
<Button
android:id="@+id/delete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Delete First"
android:onClick="onClick"/>
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
public class MainActivity extends ListActivity {
private CommentDataSourse datasource;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_two);
datasource = new CommentDataSourse(this);
datasource.open();
List<Comment> values = datasource.getAllComments();
// use the SimpleCursorAdapter to show the
// elements in a ListView
ArrayAdapter<Comment> adapter = new ArrayAdapter<Comment>(this,
android.R.layout.simple_list_item_1, values);
setListAdapter(adapter);
}
// Will be called via the onClick attribute
// of the buttons in main.xml
public void onClick(View view) {
@SuppressWarnings("unchecked")
ArrayAdapter<Comment> adapter = (ArrayAdapter<Comment>) getListAdapter();
Comment comment = null;
switch (view.getId()) {
case R.id.add:
String[] comments = new String[] { "Cool", "Very nice", "Hate it" };
int nextInt = new Random().nextInt(3);
// save the new comment to the database
comment = datasource.createComment(comments[nextInt]);
adapter.add(comment);
break;
case R.id.delete:
if (getListAdapter().getCount() > 0) {
comment = (Comment) getListAdapter().getItem(0);
datasource.deleteComment(comment);
adapter.remove(comment);
}
break;
}
adapter.notifyDataSetChanged();
}
@Override
protected void onResume() {
datasource.open();
super.onResume();
}
@Override
protected void onPause() {
datasource.close();
super.onPause();
}
}
日志文件:
10-22 12:14:49.794: I/Database(11578): sqlite returned: error code = 1, msg = near "autoincreament": syntax error
10-22 12:14:49.794: E/Database(11578): Failure 1 (near "autoincreament": syntax error) on 0x2aa3f8 when preparing 'create table comments(_idinteger primary key autoincreament, commenttext not null);'.
10-22 12:14:49.804: D/AndroidRuntime(11578): Shutting down VM
10-22 12:14:49.804: W/dalvikvm(11578): threadid=1: thread exiting with uncaught exception (group=0x40015560)
10-22 12:14:49.844: E/AndroidRuntime(11578): FATAL EXCEPTION: main
10-22 12:14:49.844: E/AndroidRuntime(11578): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testmysdkdb/com.example.testmysdkdb.MainActivity}: android.database.sqlite.SQLiteException: near "autoincreament": syntax error: create table comments(_idinteger primary key autoincreament, commenttext not null);
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.os.Handler.dispatchMessage(Handler.java:99)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.os.Looper.loop(Looper.java:123)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.app.ActivityThread.main(ActivityThread.java:3683)
10-22 12:14:49.844: E/AndroidRuntime(11578): at java.lang.reflect.Method.invokeNative(Native Method)
10-22 12:14:49.844: E/AndroidRuntime(11578): at java.lang.reflect.Method.invoke(Method.java:507)
10-22 12:14:49.844: E/AndroidRuntime(11578): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-22 12:14:49.844: E/AndroidRuntime(11578): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-22 12:14:49.844: E/AndroidRuntime(11578): at dalvik.system.NativeStart.main(Native Method)
10-22 12:14:49.844: E/AndroidRuntime(11578): Caused by: android.database.sqlite.SQLiteException: near "autoincreament": syntax error: create table comments(_idinteger primary key autoincreament, commenttext not null);
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.database.sqlite.SQLiteDatabase.native_execSQL(Native Method)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1763)
10-22 12:14:49.844: E/AndroidRuntime(11578): at com.example.testmysdkdb.MyDBHelper.onCreate(MyDBHelper.java:21)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:126)
10-22 12:14:49.844: E/AndroidRuntime(11578): at com.example.testmysdkdb.CommentDataSourse.open(CommentDataSourse.java:23)
10-22 12:14:49.844: E/AndroidRuntime(11578): at com.example.testmysdkdb.MainActivity.onCreate(MainActivity.java:22)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-22 12:14:49.844: E/AndroidRuntime(11578): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
10-22 12:14:49.844: E/AndroidRuntime(11578): ... 11 more