嗨，我一直收到这个错误，我已经多次查看我的数据库结构，看不出我做错了什么
以下是我的错误
11-27 18:42:17.590: E/AndroidRuntime(16335): FATAL EXCEPTION: main
11-27 18:42:17.590: E/AndroidRuntime(16335): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.doja.myapp/com.doja.myapp.Database}: android.database.sqlite.SQLiteException: near "Database": syntax error (code 1): , while compiling: CREATE TABLE IF NOT EXISTS Device Database (_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, date TEXT NOT NULL, time TEXT NOT NULL, duration TEXT NOT NULL);
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.app.ActivityThread.access$600(ActivityThread.java:140)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.os.Handler.dispatchMessage(Handler.java:99)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.os.Looper.loop(Looper.java:137)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.app.ActivityThread.main(ActivityThread.java:4898)
11-27 18:42:17.590: E/AndroidRuntime(16335): at java.lang.reflect.Method.invokeNative(Native Method)
11-27 18:42:17.590: E/AndroidRuntime(16335): at java.lang.reflect.Method.invoke(Method.java:511)
11-27 18:42:17.590: E/AndroidRuntime(16335): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
11-27 18:42:17.590: E/AndroidRuntime(16335): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
11-27 18:42:17.590: E/AndroidRuntime(16335): at dalvik.system.NativeStart.main(Native Method)
11-27 18:42:17.590: E/AndroidRuntime(16335): Caused by: android.database.sqlite.SQLiteException: near "Database": syntax error (code 1): , while compiling: CREATE TABLE IF NOT EXISTS Device Database (_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL, date TEXT NOT NULL, time TEXT NOT NULL, duration TEXT NOT NULL);
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1012)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:623)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1663)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1594)
11-27 18:42:17.590: E/AndroidRuntime(16335): at com.doja.myapp.DBAdapter$DBHelper.onCreate(DBAdapter.java:60)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:252)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:188)
11-27 18:42:17.590: E/AndroidRuntime(16335): at com.doja.myapp.DBAdapter.open(DBAdapter.java:73)
11-27 18:42:17.590: E/AndroidRuntime(16335): at com.doja.myapp.Database.openDB(Database.java:74)
11-27 18:42:17.590: E/AndroidRuntime(16335): at com.doja.myapp.Database.onCreate(Database.java:23)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.app.Activity.performCreate(Activity.java:5206)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083)
11-27 18:42:17.590: E/AndroidRuntime(16335): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
11-27 18:42:17.590: E/AndroidRuntime(16335): ... 11 more
11-27 18:42:17.630: D/dalvikvm(16335): GC_CONCURRENT freed 170K, 10% free 12372K/13639K, paused 12ms+2ms, total 30ms
这是数据库类
package com.doja.myapp;
import java.util.ArrayList;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.view.Menu;
import android.widget.TextView;
public class Database extends Activity {
DBAdapter myDb;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_database);
Intent intent = getIntent();
openDB();
//long newId = myDb.insertRow("Doja", "12/12/2013", "06:34", "2.34 seconds");
// Query for the record we just added.
// Use the ID:
//Cursor cursor = myDb.getAllRows();
//Cursor cursor = myDb.getRow(newId);
//displayRecordSet(cursor);
}
private void displayRecordSet(Cursor cursor) {
// TODO Auto-generated method stub
String message = "";
// populate the message from the cursor
// Reset cursor to start, checking to see if there's data:
if (cursor.moveToFirst()) {
do {
// Process the data:
int id = cursor.getInt(DBAdapter.COL_ROWID);
String name = cursor.getString(DBAdapter.COL_NAME);
String date = cursor.getString(DBAdapter.COL_DATE);
String time = cursor.getString(DBAdapter.COL_TIME);
String duration = cursor.getString(DBAdapter.COL_DURATION);
// Append data to the message:
message += "id:" + id
+", Name:" + name
+", Date:" + date
+", Time:" + time
+", Duration:" + duration
+"\n";
} while(cursor.moveToNext());
}
cursor.close();
displayText(message);
}
private void displayText(String message) {
// TODO Auto-generated method stub
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText(message);
}
private void openDB() {
// TODO Auto-generated method stub
myDb = new DBAdapter(this);
myDb.open();
Cursor cursor = myDb.getAllRows();
}
@Override
protected void onDestroy() {
super.onDestroy();
closeDB();
}
private void closeDB() {
// TODO Auto-generated method stub
myDb.close();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.database, menu);
return true;
}
}
我的DBAdapater课程
package com.doja.myapp;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DBAdapter {
private static final String TAG = "DBAdapter";
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "Results";
static final String DATABASE_TABLE = "Device Database";
private static final String KEY_ROWID = "_id";
public static final int COL_ROWID = 0;
static final String KEY_NAME = "name";
static final String KEY_DATE = "date";
static final String KEY_TIME = "time";
static final String KEY_DURATION = "duration";
public static final int COL_NAME = 1;
public static final int COL_DATE = 2;
public static final int COL_TIME = 3;
public static final int COL_DURATION = 4;
public static final String[] ALL_KEYS = new String[] {KEY_ROWID, KEY_NAME, KEY_DATE, KEY_TIME, KEY_DURATION};
private static final String DATABASE_TABLE_CREATE =
"CREATE TABLE IF NOT EXISTS " + DATABASE_TABLE + " ("
+ KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ KEY_NAME + " TEXT NOT NULL, "
+ KEY_DATE + " TEXT NOT NULL, "
+ KEY_TIME + " TEXT NOT NULL, "
+ KEY_DURATION + " TEXT NOT NULL"
+ ");";
private DBHelper myDBHelper;
private final Context myContext;
private SQLiteDatabase myDatabase;
public DBAdapter(Context ctx) {
this.myContext = ctx;
myDBHelper = new DBHelper(myContext);
}
private static class DBHelper extends SQLiteOpenHelper {
public DBHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL(DATABASE_TABLE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
onCreate(db);
}
}
// Open the database connection.
public DBAdapter open() {
myDatabase = myDBHelper.getReadableDatabase();
return this;
}
// Close the database connection.
public void close() {
myDBHelper.close();
}
// Add a new set of values to the database.
public long insertRow(String name, String date, String time, String duration) {
ContentValues initialValues = new ContentValues();
initialValues.put(KEY_NAME, name);
initialValues.put(KEY_DATE, date);
initialValues.put(KEY_TIME, time);
initialValues.put(KEY_DURATION, duration);
// Insert it into the database.
return myDatabase.insert(DATABASE_TABLE, null, initialValues);
}
// Delete a row from the database, by rowId (primary key)
public boolean deleteRow(long rowId) {
String where = KEY_ROWID + "=" + rowId;
return myDatabase.delete(DATABASE_TABLE, where, null) != 0;
}
public void deleteAll() {
Cursor c = getAllRows();
long rowId = c.getColumnIndexOrThrow(KEY_ROWID);
if (c.moveToFirst()) {
do {
deleteRow(c.getLong((int) rowId));
} while (c.moveToNext());
}
c.close();
}
// Return all data in the database.
public Cursor getAllRows() {
String where = null;
Cursor c = myDatabase.query(true, DATABASE_TABLE, ALL_KEYS,
where, null, null, null, null, null);
if (c != null) {
c.moveToFirst();
}
return c;
}
// Get a specific row (by rowId)
public Cursor getRow(long rowId) {
String where = KEY_ROWID + "=" + rowId;
Cursor c = myDatabase.query(true, DATABASE_TABLE, ALL_KEYS,
where, null, null, null, null, null);
if (c != null) {
c.moveToFirst();
}
return c;
}
// Change an existing row to be equal to new data.
public boolean updateRow(long rowId, String name, String date, String time, String duration) {
String where = KEY_ROWID + "=" + rowId;
ContentValues newValues = new ContentValues();
newValues.put(KEY_NAME, name);
newValues.put(KEY_DATE, date);
newValues.put(KEY_TIME, time);
newValues.put(KEY_DURATION, duration);
// Insert it into the database.
return myDatabase.update(DATABASE_TABLE, newValues, where, null) != 0;
}
}
并在我的主要活动中
public void openDatabase(View view) {
Intent openDatabase = new Intent(MainActivity.this, Database.class);
MainActivity.this.startActivity(openDatabase);
startActivity(openDatabase);
}
答案 0 :(得分：3)
你不能打电话给你的桌子
Device Database
你的姓名不能留空。建议，这将有效：
DeviceDatabase
Device_Database