Question

我在按钮的onclick方法中创建数据库和表（保存）。单击“保存”按钮时，将创建数据库和表。我可以采取5 edittext输出。在此程序中，用户无法输入值。例如定时器控制。在计时器应用程序中，当用户按下开始按钮然后启动倒数计时器时，他按下停止按钮然后停止值，并在按下保存按钮时将值存储在数据库中。所以我可以在保存按钮上创建数据库和表。请给我一些建议和代码，用于插入outout值，而不是像数据库中用户输入的值。我的代码如下：

代码：

btn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
        Intent intent =new Intent(Timedetails.this,ListActivity.class); 
        Toast.makeText(getApplicationContext(), "Project has been added to List", 1).show();
        startActivity(intent);
            try{

                        SQLiteDatabase db;
                db = openOrCreateDatabase("timer", MODE_PRIVATE, null);
                db.execSQL("create table timerdetail("
                        + "project_id integer PRIMARY KEY autoincrement,"
                        + "name text,"
                        + "Timerpoint1 text,"
                        + "Timerpoint2 text,"
                        + "Timerpoint3 text,"
                        + "ServiceTime1 text,"
                        + "ServiceTime2 text);");
                Toast.makeText(getApplicationContext(), "Table is created", 1).show();


            }
            catch(Exception e){
                e.printStackTrace();
            }
        }

Answer 1

插入代码：

ContentValues cvTimerDtl = new ContentValues();
cvTimerDtl.put("name", name);
cvTimerDtl.put("Timerpoint1", tPoint1);
cvTimerDtl.put("Timerpoint2", tPoint2);
cvTimerDtl.put("Timerpoint3", tPoint3);
cvTimerDtl.put("ServiceTime1", sTime1);
cvTimerDtl.put("ServiceTime2", sTime2);
db.insert("timerdetail",  null, cvTimerDtl);

编辑：我认为它应该有效。但我仍在发布另一个代码：

String query = "INSERT INTO timerdetail (name, Timerpoint1, Timerpoint2, Timerpoint3, ServiceTime1, ServiceTime2) VALUES ('"
                + name + "', '" + tPoint1 + "', '" + tPoint2 + "', '" + tPoint3 + "', '" + sTime1 + "', '" + sTime2 + "');";

db.execSQL(query);

编辑：

您的onClick代码首先启动intent，然后尝试将数据插入数据库：改变如下：

@Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                try{
                    db = SQLiteDatabase.openDatabase("data/data/com.example.timerdemo2/timer", null, SQLiteDatabase.CREATE_IF_NECESSARY);

                    //db = openOrCreateDatabase("timer", MODE_PRIVATE, null);
                    db.execSQL("create table timerdetail("
                            + "project_id integer PRIMARY KEY autoincrement,"
                            + "name text,"
                            + "Timerpoint1 text,"
                            + "Timerpoint2 text,"
                            + "Timerpoint3 text,"
                            + "ServiceTime1 text,"
                            + "ServiceTime2 text);");

                    Toast.makeText(getApplicationContext(), "Table is created", 1).show();

            //      db.execSQL("insert into timerdetail(name,tmpoint1,tmpoint2,tmpoint3,servicetime1,servicetime2) values ();");
    /*              ContentValues cv = new ContentValues();
                    //cv.put("name", eta.getText().toString());
                    cv.put("timing_point1", eta.getText().toString());
                    cv.put("timing_point2", etb.getText().toString());
                    cv.put("timing_point3", etc.getText().toString());
                    int rowposition = (int) db.insert("timerdetail", null, cv);     */
                    addRecord();

                }
                catch(Exception e){
                    e.printStackTrace();
                }
            Intent intent =new Intent(Timedetails.this,ListActivity.class); 
            Toast.makeText(getApplicationContext(), "Project has been added to List", 1).show();
            startActivity(intent);
            }

编辑：

更改

db.execSQL("create table timerdetail("
                            + "project_id integer PRIMARY KEY autoincrement,"
                            + "name text,"
                            + "Timerpoint1 text,"
                            + "Timerpoint2 text,"
                            + "Timerpoint3 text,"
                            + "ServiceTime1 text,"
                            + "ServiceTime2 text);");

到

db.execSQL("create table IF NOT EXISTS timerdetail("
                            + "project_id integer PRIMARY KEY autoincrement,"
                            + "name text,"
                            + "Timerpoint1 text,"
                            + "Timerpoint2 text,"
                            + "Timerpoint3 text,"
                            + "ServiceTime1 text,"
                            + "ServiceTime2 text);");

因此，如果表已经存在，则不会创建该表。

编辑：

如果要放置x个列，则内容值将包含许多键值对。所以如果你想在数据库中添加标题。将内容值更改为

ContentValues cvTimerDtl = new ContentValues();

cvTimerDtl.put("title", title);
cvTimerDtl.put("name", name);
cvTimerDtl.put("Timerpoint1", tPoint1);
cvTimerDtl.put("Timerpoint2", tPoint2);
cvTimerDtl.put("Timerpoint3", tPoint3);
cvTimerDtl.put("ServiceTime1", sTime1);
cvTimerDtl.put("ServiceTime2", sTime2);
db.insert("timerdetail",  null, cvTimerDtl);

我们在onclick方法中创建数据库和表时如何使用插入查询

1 个答案: