也不要使用它已被棄用。
除去此：
protected SQLiteDatabase database;
，並使其局部
基本上2方法被同時執行和一個方法叫做database.close()和第二方法仍在訪問數據，所以Exception
使用這樣的：
public class db {
DataBaseHelper dbHelper;
Context mContext;
public db(Context context) {
this.mContext = context;
}
public db open() throws SQLException {
dbHelper = new DataBaseHelper(mContext);
return this;
}
public void close() {
dbHelper.close();
}
public void insertdb(int id,String ph_num, String call_type, String calldate, String call_duration, String upload_status) {
SQLiteDatabase database = dbHelper.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(DataBaseHelper.id,id);
values.put(DataBaseHelper.phone_number, ph_num);
values.put(DataBaseHelper.call_type, call_type);
values.put(DataBaseHelper.call_date, calldate);
values.put(DataBaseHelper.call_duration, call_duration);
values.put(DataBaseHelper.upload_status, upload_status);
database.insert(DataBaseHelper.table_name, null, values);
database.close();
// Log.d("Database helper", "values inserted");
}
public ArrayList<HashMap<String, String>> getAllUsers() {
ArrayList<HashMap<String, String>> wordList;
wordList = new ArrayList<HashMap<String, String>>();
String selectQuery = "SELECT * FROM call_logtable";
SQLiteDatabase database = dbHelper.getWritableDatabase();
Cursor cursor = database.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
HashMap<String, String> map = new HashMap<String, String>();
map.put("id", cursor.getString(0));
map.put("phone_number", cursor.getString(1));
map.put("call_type", cursor.getString(2));
map.put("call_date", cursor.getString(3));
map.put("call_duration", cursor.getString(4));
wordList.add(map);
} while (cursor.moveToNext());
}
cursor.close(); // just added
database.close();
return wordList;
}
/**
* Compose JSON out of SQLite records
* @return
*/
public String composeJSONfromSQLite(){
ArrayList<HashMap<String, String>> wordList;
wordList = new ArrayList<HashMap<String, String>>();
String selectQuery = "SELECT * FROM call_logtable where upload_status = '"+"no"+"'";
SQLiteDatabase database = dbHelper.getWritableDatabase();
Cursor cursor = database.rawQuery(selectQuery, null);
if (cursor.moveToFirst()) {
do {
HashMap<String, String> map = new HashMap<String, String>();
map.put("id", cursor.getString(0));
map.put("phone_number", cursor.getString(1));
map.put("call_type", cursor.getString(2));
map.put("call_date", cursor.getString(3));
map.put("call_duration", cursor.getString(4));
wordList.add(map);
} while (cursor.moveToNext());
}
cursor.close(); // just added
database.close();
Gson gson = new GsonBuilder().create();
//Use GSON to serialize Array List to JSON
return gson.toJson(wordList);
}
public int dbSyncCount(){
int count = 0;
String selectQuery = "SELECT * FROM call_logtable where upload_status = '"+"no"+"'";
SQLiteDatabase database = dbHelper.getWritableDatabase();
Cursor cursor = database.rawQuery(selectQuery, null);
count = cursor.getCount();
cursor.close(); // just added
database.close();
return count;
}
public void updateSyncStatus(String id, String status){
SQLiteDatabase database = dbHelper.getWritableDatabase();
String updateQuery = "Update call_logtable set upload_status = '"+ status +"' where id="+"'"+ id +"'";
Log.d("query", updateQuery);
database.execSQL(updateQuery);
database.close();
}
public Cursor getinformation()
{
SQLiteDatabase database = dbHelper.getReadableDatabase();
String[] columns={DataBaseHelper.phone_number,DataBaseHelper.call_type,DataBaseHelper.call_date,DataBaseHelper.call_duration,DataBaseHelper.upload_status};
return database.query(DataBaseHelper.table_name,columns,null,null,null,null,null);
}
public void delete()
{
SQLiteDatabase database = dbHelper.getWritableDatabase();
// String[] columns={DataBaseHelper.phone_number,DataBaseHelper.call_type,DataBaseHelper.call_date,DataBaseHelper.call_duration};
database.delete(DataBaseHelper.table_name, null, null);
}
StringBuffer readSpecificfrom_db(String type)
{
String ph_number=null;
String call_type=null;
String call_date=null;
String call_duration=null;
String upload_status=null;
StringBuffer sb = new StringBuffer();
//sb.append("Call Log :");
Cursor cursor_object=getinformation();
cursor_object.moveToFirst();
do {
if((cursor_object.getString(1)).equals(type)) {
ph_number = cursor_object.getString(0);
call_type = cursor_object.getString(1);
call_date = cursor_object.getString(2);
call_duration = cursor_object.getString(3);
if(type=="Missed") {
sb.append("\nPhone Number:--- " + ph_number +
" \nCall Type:--- " + call_type +
" \nCall Date:--- " + call_date
// + " \nCall duration in sec :--- " + call_duration
);
sb.append("\n----------------------------------");
}
else
{
sb.append("\nPhone Number:--- " + ph_number +
" \nCall Type:--- " + call_type +
" \nCall Date:--- " + call_date
+ " \nCall duration in sec :--- " + call_duration);
sb.append("\n----------------------------------");
}
}
}while(cursor_object.moveToNext());
cursor_object.close(); // just added
return sb;
}
StringBuffer readfrom_db()
{
String ph_number=null;
String call_type=null;
String call_date=null;
String call_duration=null;
String upload_status;
// int id=0;
StringBuffer sb = new StringBuffer();
// sb.append("Call Log :");
Cursor cursor_object=getinformation();
cursor_object.moveToFirst();
do {
ph_number=cursor_object.getString(0);
call_type=cursor_object.getString(1);
call_date=cursor_object.getString(2);
call_duration=cursor_object.getString(3);
sb.append("\nPhone Number:--- " + ph_number +
" \nCall Type:--- " + call_type +
" \nCall Date:--- " + call_date
+ " \nCall duration in sec :--- " + call_duration);
sb.append("\n----------------------------------");
} while(cursor_object.moveToNext());
cursor_object.close(); // just added
return sb;
}
}
所以你的問題到底是什麼？該錯誤幾乎可以解釋自己 – tyczj
秒tme我無法刪除圖像 – Dilshi
該錯誤指向什麼行？ – thegrinner