使用Sqlite出错？这是怎么一回事？

[a383028663]

学到关于Sqlite方面的应用，一开始借用了书本上的范例程序自己稍微改了一下，可是一进入显示数据库记录的Activity立刻就报错，但奇怪的是书本上的源程序却能正常运行？！对照着书本源代码修改了很多次，最后受不了索性改得完全一模一样（除了个别名词外）还是显示意外关闭的窗口。。。。网上也没有类似的案例，好心的大哥帮小弟看看吧


我的页面代码：
package lzy.test;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class ScoreList extends ListActivity{
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
this.setTitle("查看得分记录");
final Score s=new Score(this);
Cursor c=s.query();
String[] from={"_id","name","score","level"};
int[] to={R.id.text01,R.id.text02,R.id.text03,R.id.text04};
SimpleCursorAdapter adapter=new SimpleCursorAdapter(this,R.layout.scorelist,c,from,to);
ListView listview=getListView();
listview.setAdapter(adapter);
final AlertDialog.Builder builder=new AlertDialog.Builder(this);
listview.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0,View arg1,int arg2,long arg3){
final long temp=arg3;
builder.setMessage("真的要删除记录吗？").setPositiveButton("是",
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
s.del((int)temp);
Cursor c=s.query();
String[] from={"_id","name","score","level"};
int[] to={R.id.text01,R.id.text02,R.id.text03,R.id.text04};
SimpleCursorAdapter adapter=new SimpleCursorAdapter(getApplicationContext(),R.layout.scorelist,c,from,to);
ListView listview=getListView();
listview.setAdapter(adapter);
}
}).setNegativeButton("否",
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {

}
});
AlertDialog ad=builder.create();
ad.show();
}
});
s.close();
}
}


书上的源代码：
package com.amaker.test;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.database.Cursor;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.AdapterView.OnItemClickListener;

public class QueryActivity extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setTitle("浏览收藏信息");
final DBHelper helpter = new DBHelper(this);
Cursor c = helpter.query();

String[] from = { "_id", "name", "url", "desc" };
int[] to = { R.id.text0, R.id.text1, R.id.text2, R.id.text3 };

SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
R.layout.row, c, from, to);
ListView listView = getListView();
listView.setAdapter(adapter);


final AlertDialog.Builder builder = new AlertDialog.Builder(this);

listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
final long temp = arg3;
builder.setMessage("真的要删除该记录吗？").setPositiveButton("是",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
helpter.del((int)temp);
Cursor c = helpter.query();
String[] from = { "_id", "name", "url", "desc" };
int[] to = { R.id.text0, R.id.text1, R.id.text2, R.id.text3 };

SimpleCursorAdapter adapter = new SimpleCursorAdapter(getApplicationContext(),
R.layout.row, c, from, to);
ListView listView = getListView();
listView.setAdapter(adapter);
}
}).setNegativeButton("否",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {

}
});
AlertDialog ad = builder.create();
ad.show();
}
});
helpter.close();
}
}

[a383028663]

果然高分之下也没有勇夫，这代码对照起来的确很麻烦。。。。

[qiying1988]

logcat 信息提示什么？

[a383028663]

[Quote=引用 3 楼 qiying1988 的回复:]

logcat 信息提示什么？
[/Quote]

错误信息好多，我不知道该怎么贴上来。。。

[念茜]

你贴这么多代码 不如贴错误信息

[a383028663]

还有我的数据库代码：
package lzy.test;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class Score extends SQLiteOpenHelper{
private static final String DB_NAME="abc.db";
private static final String TBL_NAME="PlayerScore";
private static final String CREATE_TBL="create table"+
"PlayerScore(_id integer primary key autoincrement,name text,score text,level text)";

private SQLiteDatabase db;

Score(Context c){
super(c,DB_NAME,null,2);
}
@Override
public void onCreate(SQLiteDatabase db){
this.db=db;
db.execSQL(CREATE_TBL);
}
public void insert(ContentValues values){
SQLiteDatabase db=getWritableDatabase();
db.insert(TBL_NAME, null, values);
db.close();
}
public Cursor query(){
SQLiteDatabase db=getWritableDatabase();
Cursor c=db.query(TBL_NAME, null, null, null, null, null, null);
return c;
}
public void del(int id){
if(db==null)
db=getWritableDatabase();
db.delete(TBL_NAME, "_id=?", new String[]{String.valueOf(id)});
}
public void close(){
if(db!=null)
db.close();
}
public void onUpgrade(SQLiteDatabase db,int oldVersion,int newVersion){
}
}


书上的数据库源代码：
package com.amaker.test;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DBHelper extends SQLiteOpenHelper {
private static final String DB_NAME = "coll.db";
private static final String TBL_NAME = "CollTbl";
private static final String CREATE_TBL = " create table "
+ " CollTbl(_id integer primary key autoincrement,name text,url text, desc text) ";

private SQLiteDatabase db;

DBHelper(Context c) {
super(c, DB_NAME, null, 2);
}

@Override
public void onCreate(SQLiteDatabase db) {
this.db = db;
db.execSQL(CREATE_TBL);
}

public void insert(ContentValues values) {
SQLiteDatabase db = getWritableDatabase();
db.insert(TBL_NAME, null, values);
db.close();
}

public Cursor query() {
SQLiteDatabase db = getWritableDatabase();
Cursor c = db.query(TBL_NAME, null, null, null, null, null, null);
return c;
}

public void del(int id) {
if (db == null)
db = getWritableDatabase();
db.delete(TBL_NAME, "_id=?", new String[] { String.valueOf(id) });
}

public void close() {
if (db != null)
db.close();
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

}
}

[完美灬缺陷]

[Quote=引用 4 楼 a383028663 的回复:]
引用 3 楼 qiying1988 的回复:

logcat 信息提示什么？


错误信息好多，我不知道该怎么贴上来。。。
[/Quote]

只把error部分关键地方贴出来就可以了、

[wenlin56]

汗，贴这么多代码，却看不到异常信息....

[rocky225]

就是 把主要的异常帖出来就行了 谁那么费时间看你代码

[silence_dml]

我建议楼主把布局文件先好好看下。没有LOG，我们也是无从下手啊。

[a383028663]

快一年了。。。结一下帖，问题是工程没有Clean导致的，已经自己解决了