有没有人遇到类似的问题？
现在我正在使用Sqlite DB来保存android中的数据。但我得到了一些问题，如下面的logcat，这是限制，我无法运行我的应用程序。
建议请。
logcat的
06-04 12:03:05.603: E/Cursor(281): Finalizing a Cursor that has not been deactivated or closed. database = /data/data/org.twinkletech.postcourier/databases/GetNewsDetailsManager, table = null, query = SELECT * FROM getnewsdetails
06-04 12:03:05.603: E/Cursor(281): android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here
06-04 12:03:05.603: E/Cursor(281): at android.database.sqlite.SQLiteCursor.<init>(SQLiteCursor.java:210)
06-04 12:03:05.603: E/Cursor(281): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:53)
06-04 12:03:05.603: E/Cursor(281): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345)
06-04 12:03:05.603: E/Cursor(281): at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1315)
06-04 12:03:05.603: E/Cursor(281): at org.twinkletech.postcourier.DatabaseHandler.getAllContacts(DatabaseHandler.java:91)
06-04 12:03:05.603: E/Cursor(281): at org.twinkletech.postcourier.Splash_Screen$Show_Default_News.Call_db_handler(Splash_Screen.java:133)
06-04 12:03:05.603: E/Cursor(281): at org.twinkletech.postcourier.Splash_Screen$Show_Default_News.Call_Service(Splash_Screen.java:99)
06-04 12:03:05.603: E/Cursor(281): at org.twinkletech.postcourier.Splash_Screen$Show_Default_News.doInBackground(Splash_Screen.java:62)
06-04 12:03:05.603: E/Cursor(281): at org.twinkletech.postcourier.Splash_Screen$Show_Default_News.doInBackground(Splash_Screen.java:1)
06-04 12:03:05.603: E/Cursor(281): at android.os.AsyncTask$2.call(AsyncTask.java:185)
06-04 12:03:05.603: E/Cursor(281): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
06-04 12:03:05.603: E/Cursor(281): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
06-04 12:03:05.603: E/Cursor(281): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
06-04 12:03:05.603: E/Cursor(281): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
06-04 12:03:05.603: E/Cursor(281): at java.lang.Thread.run(Thread.java:1096)
MainActivity.java
String str_data = "On 14 November 1987, Tendulkar was selected to represent Mumbai in the Ranji Trophy, India's premier domestic First-class cricket tournament, for the 1987–88 season. However, he was not selected for the final eleven in any of the matches, though he was often used as a substitute fielder";
DatabaseHandler db = new DatabaseHandler(Splash_Screen.this);
// Inserting Contacts
Log.d("Insert: ", "Inserting ..");
db.addContact(new NewsDetails(result_data));
// Reading all contacts
Log.d(">>--Reading: ", "Reading all contacts..");
List<NewsDetails> contacts = db.getAllContacts();
for (NewsDetails cn : contacts)
{
// str_db_news = "Id: "+cn.getID()+" ,Name: " + cn.getName() ;
String str_db_news = cn.getName();
}
}
DatabaseHandler.java
public class DatabaseHandler extends SQLiteOpenHelper
{
// All Static variables
// Database Version
private static final int DATABASE_VERSION = 1;
// Database Name
private static final String DATABASE_NAME = "GetNewsDetailsManager";
// NewsDetails table name
private static final String TABLE_NAME = "getnewsdetails";
// NewsDetails Table Columns names
private static final String KEY_ID = "id";
private static final String KEY_NAME = "name";
public DatabaseHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
String CREATE_NEWS_TABLE = "CREATE TABLE " + TABLE_NAME + "("
+ KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT"+ ")";
db.execSQL(CREATE_NEWS_TABLE);
}
// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// Drop older table if existed
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
// Create tables again
onCreate(db);
}
// Adding new contact
public void addContact(NewsDetails contact) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, contact.getName()); // Contact Name
// Inserting Row
db.insert(TABLE_NAME, null, values);
db.close(); // Closing database connection
}
// Getting single contact
NewsDetails getContact(int id) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_NAME, new String[] { KEY_ID,
KEY_NAME }, KEY_ID + "=?",
new String[] { String.valueOf(id) }, null, null, null);
if (cursor != null)
cursor.moveToFirst();
NewsDetails contact = new NewsDetails(Integer.parseInt(cursor.getString(0)),
cursor.getString(1));
// return contact
return contact;
}
// Getting All Contacts
public List<NewsDetails> getAllContacts() {
List<NewsDetails> newsdatalist = new ArrayList<NewsDetails>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_NAME;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
NewsDetails news_data = new NewsDetails();
// contact.setID(Integer.parseInt(cursor.getString(0)));
news_data.setID(cursor.getInt(0));
news_data.setName(cursor.getString(1));
// Adding contact to list
newsdatalist.add(news_data);
} while (cursor.moveToNext());
}
db.close(); //
return newsdatalist;
}
// Updating single contact
public int updateContact(NewsDetails contact) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, contact.getName());
// updating row
return db.update(TABLE_NAME, values, KEY_ID + " = ?",
new String[] { String.valueOf(contact.getID()) });
}
// Deleting single contact
public void deleteContact(NewsDetails contact) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_NAME, KEY_ID + " = ?",
new String[] { String.valueOf(contact.getID()) });
db.close();
}
// Getting contacts Count
public int getContactsCount() {
String countQuery = "SELECT * FROM " + TABLE_NAME;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
cursor.close();
// return count
return cursor.getCount();
}}
NewsDetails.java
public class NewsDetails {
//private variables
int _id;
String _name;
// Empty constructor
public NewsDetails(){
}
// constructor
public NewsDetails(int id, String name){
this._id = id;
this._name = name;
}
// constructor
public NewsDetails(String name){
this._name = name;
}
// getting ID
public int getID(){
return this._id;
}
// setting id
public void setID(int id){
this._id = id;
}
// getting name
public String getName(){
return this._name;
}
// setting name
public void setName(String name){
this._name = name;
}}
答案 0 :(得分：2)
似乎缺少关闭数据库处理中的光标。
例如：在您的getContact方法中，请不要忘记在返回值之前调用cursor.close()。