我目前正在使用android adt在eclipse中工作，无法让我的应用程序打开。我已经尝试清理应用程序并多次卸载它，我不知道还能做些什么来让我的数据库显示信息。我在模拟器和我的motorola droid仿生Android设备上尝试这个。我是非常新的android编程所以任何类型的帮助将不胜感激，我的代码可以在下面找到。 eclipse软件的细节是：
Eclipse SDK 版本：4.2.1 构建ID：M20120914-1800
创建数据库的主要活动：
package com.example.database;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class MainActivity
{
public static final String KEY_ROWID = "_id";
public static final String KEY_BUSINESS = "business";
public static final String KEY_ADDRESS = "address";
public static final String KEY_PHONE = "phone";
public static final String KEY_HOURS = "hours";
public static final String KEY_WEB = "website";
private static final String TAG = "MainActivity";
private static final String DATABASE_NAME = "BloomBusiness";
private static final String DATABASE_TABLE = "Business";
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_CREATE =
"create table Business (_id integer primary key autoincrement, "
+ "business text not null, address text not null, phone text not null, hours text not null"
+ "website text not null)";
private final Context context;
private DatabaseHelper DBHelper;
private SQLiteDatabase db;
public MainActivity(Context ctx)
{
this.context = ctx;
DBHelper = new DatabaseHelper(context);
}
private static class DatabaseHelper extends SQLiteOpenHelper
{
DatabaseHelper(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db)
{
db.execSQL(DATABASE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion,
int newVersion)
{
Log.w(TAG, "Upgrading database from version " + oldVersion
+ " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS Business");
onCreate(db);
}
}
//---opens the database---
public MainActivity open() throws SQLException
{
db = DBHelper.getWritableDatabase();
return this;
}
//---closes the database---
public void close()
{
DBHelper.close();
}
//---insert a title into the database---
public long insertTitle(String business, String address, String phone, String hours, String website)
{
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_BUSINESS, business);
initialValues.put(KEY_ADDRESS, address);
initialValues.put(KEY_PHONE, phone);
initialValues.put(KEY_HOURS, hours);
initialValues.put(KEY_WEB, hours);
return db.insert(DATABASE_TABLE, null, initialValues);
}
//---deletes a particular title---
public boolean deleteTitle(long rowId)
{
return db.delete(DATABASE_TABLE, KEY_ROWID +
"=" + rowId, null) > 0;
}
//---retrieves all the titles---
public Cursor getAllTitles()
{
return db.query(DATABASE_TABLE, new String[] {
KEY_ROWID,
KEY_BUSINESS,
KEY_ADDRESS,
KEY_PHONE,
KEY_HOURS,
KEY_WEB},
null,
null,
null,
null,
null);
}
//---retrieves a particular title---
public Cursor getTitle(long rowId) throws SQLException
{
Cursor mCursor =
db.query(true, DATABASE_TABLE, new String[] {
KEY_ROWID,
KEY_BUSINESS,
KEY_ADDRESS,
KEY_PHONE,
KEY_HOURS,
KEY_WEB
},
KEY_ROWID + "=" + rowId,
null,
null,
null,
null,
null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
//---updates a title---
public boolean updateTitle(long rowId, String business,
String address, String phone, String hours, String website)
{
ContentValues args = new ContentValues();
args.put(KEY_BUSINESS, business);
args.put(KEY_ADDRESS, address);
args.put(KEY_PHONE, phone);
args.put(KEY_HOURS,hours);
args.put(KEY_WEB,website);
return db.update(DATABASE_TABLE, args,
KEY_ROWID + "=" + rowId, null) > 0;
}
}
正在显示的数据库信息：
package com.example.database;
import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.widget.Toast;
public class DBUse extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MainActivity db = new MainActivity(this);
db.open();
Cursor c = db.getAllTitles();
if(c.moveToFirst())
{
do{DisplayTitle(c);
}while (c.moveToNext());
}
db.open();
Cursor b = db.getTitle(1);
if (b.moveToFirst())
DisplayTitle(c);
else
Toast.makeText(this,"No business found",Toast.LENGTH_LONG).show();
db.close();
db.close();
}
public void DisplayTitle(Cursor c) {
Toast.makeText(this,
"Name: " + c.getString(1)+"\n"+
"Address:" + c.getString(2)+"\n"+
"Phone:" + c.getString(3)+"\n"+
"Hours:" + c.getString(4)+"\n"+
"Website"+ c.getShort(5),
Toast.LENGTH_LONG).show();
}
}
正在添加数据库信息：
package com.example.database;
import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.widget.Toast;
public class DBActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MainActivity db= new MainActivity(this);
db.open();
long id;
id=db.insertTitle("BloomingFoods","419 E. Kirkwood Ave. Bloomington, IN", "812-336-5300", "M-S:8AM-9PM Sun:9am-8PM","http://www.bloomingfoods.coop");
id=db.insertTitle("BloomingFoods","316 W. 6th Street Bloomington, IN", "812-333-5300", "M-S:7AM-10PM Sun:9am-9PM","http://www.bloomingfoods.coop");
id=db.insertTitle("BloomingFoods","3220 E. 3rd Street Bloomington, IN", "812-336-5300", "M-Sun:8AM-10PM","http://www.bloomingfoods.coop");
id=db.insertTitle("The Uptown Cafe","102 E. Kirkwood Ave. Bloomington, IN", "812-339-0900", "M-S:8AM-9PM Sun:9am-8PM", "http://www.the-uptown.com/");
}
}
清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.database"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.database.DBUse"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
logcat的：
04-15 20:50:23.122: E/Trace(638): error opening trace file: No such file or directory (2)
04-15 20:50:24.062: E/SQLiteLog(638): (1) no such column: website
04-15 20:50:24.072: D/AndroidRuntime(638): Shutting down VM
04-15 20:50:24.072: W/dalvikvm(638): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
04-15 20:50:24.084: E/AndroidRuntime(638): FATAL EXCEPTION: main
04-15 20:50:24.084: E/AndroidRuntime(638): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.database/com.example.database.DBUse}: android.database.sqlite.SQLiteException: no such column: website (code 1): , while compiling: SELECT _id, business, address, phone, hours, website FROM Business
04-15 20:50:24.084: E/AndroidRuntime(638): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.app.ActivityThread.access$600(ActivityThread.java:130)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.os.Handler.dispatchMessage(Handler.java:99)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.os.Looper.loop(Looper.java:137)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.app.ActivityThread.main(ActivityThread.java:4745)
04-15 20:50:24.084: E/AndroidRuntime(638): at java.lang.reflect.Method.invokeNative(Native Method)
04-15 20:50:24.084: E/AndroidRuntime(638): at java.lang.reflect.Method.invoke(Method.java:511)
04-15 20:50:24.084: E/AndroidRuntime(638): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
04-15 20:50:24.084: E/AndroidRuntime(638): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
04-15 20:50:24.084: E/AndroidRuntime(638): at dalvik.system.NativeStart.main(Native Method)
04-15 20:50:24.084: E/AndroidRuntime(638): Caused by: android.database.sqlite.SQLiteException: no such column: website (code 1): , while compiling: SELECT _id, business, address, phone, hours, website FROM Business
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1161)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1032)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1200)
04-15 20:50:24.084: E/AndroidRuntime(638): at com.example.database.MainActivity.getAllTitles(MainActivity.java:101)
04-15 20:50:24.084: E/AndroidRuntime(638): at com.example.database.DBUse.onCreate(DBUse.java:19)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.app.Activity.performCreate(Activity.java:5008)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
04-15 20:50:24.084: E/AndroidRuntime(638): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
04-15 20:50:24.084: E/AndroidRuntime(638): ... 11 more
答案 0 :(得分：1)
您尝试在“网站”列中选择包含数据的记录，但您的DATABASE CREATE不会添加此列。
Caused by: android.database.sqlite.SQLiteException: no such column: webiste (code 1): , while compiling: SELECT _id, business, address, phone, hours, webiste FROM Business
答案 1 :(得分：0)
null和phone之间需要逗号。
private static final String DATABASE_CREATE =
"create table Business (_id integer primary key autoincrement, "
+ "business text not null, address text not null, hours text not null,"
+ "phone text not null);";
答案 2 :(得分：0)
删除;从你的创建表字符串并尝试。在我的项目中，我没有使用;在create语句的末尾。
private static final String DATABASE_CREATE =
"create table Business (_id integer primary key autoincrement, "
+ "business text not null, address text not null, hours text not null,"
+ "phone text not null)";
我删除了;在语句结束时就在null之后。