Question

我开始使用Android Room而且我遇到了一些麻烦。

我有一个包含7个订单的ArrayList，当我调用insertAll（List orders）时只有4个订单插入数据库。

如何调试插入查询以查找阻塞内容？

由于

Answer 1

Room执行的调用不同步，因此可能在执行

时执行

List<Order> myOrders = mDb.getOrderDao().getAll()

它仍在插入订单。

试试这个

@Dao 
public interface OrderDao { 
    @Insert(onConflict = OnConflictStrategy.REPLACE) 
    public long insertOrder(Order order); 

    @Insert(onConflict = OnConflictStrategy.REPLACE) 
    void insertAllOrders(List<Order> order); 

    @Query("SELECT * FROM orders") 
    List<Order> getAll(); 
 }

@Entity(tableName = TABLE_NAME) 
public class Order { 
   public static final String TABLE_NAME = "orders"; 
   @PrimaryKey (autoGenerate = true)
   private int id; 
   @SerializedName("order_number") 
   @ColumnInfo(name = "order_number") 
   private String orderNumber; 
} 

// Call 
mDb.getOrderDao().insertAllOrders(orders);
Log.d(TAG, "inserted all");

Executor executor = Executors.newSingleThreadExecutor();

executor.execute(new Runnable() {
        @Override
        public void run() {

             List<Order> myOrders = mDb.getOrderDao().getAll();
             Log.d(TAG, "Orders nr = " + myOrders.size()); 
        }
});

Answer 2

必须添加OnConflict属性。

@echo off
Title Welcome Screen with DJ Buzz Radio by Hackoo 2017
mode con cols=64 lines=35 & color 0A
REM You can change the variable PeriodTime as you needs here is set to (120 seconds = 2 minutes) as example
Set "PeriodTime=120"
Call :Stop_Radio
Call :Play_DJ_Buzz_Radio
echo(
cls
:::
:::      __   __  _______  ___      ___      _______ 
:::     |  | |  ||       ||   |    |   |    |       |
:::     |  |_|  ||    ___||   |    |   |    |   _   |
:::     |       ||   |___ |   |    |   |    |  | |  |
:::     |       ||    ___||   |___ |   |___ |  |_|  |
:::     |   _   ||   |___ |       ||       ||       |
:::     |__| |__||_______||_______||_______||_______|
:::
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>NUL TIMEOUT /T %PeriodTime% /NOBREAK & Call :Stop_Radio & exit
::**************************************************************
:Play_DJ_Buzz_Radio
Taskkill /IM "wscript.exe" /F >nul 2>&1
Set vbsfile=%temp%\DJBuzzRadio.vbs
Set "URL=http://www.chocradios.ch/djbuzzradio_windows.mp3.asx"
Call:Play %URL% %vbsfile%
Start %vbsfile%
Exit /b
::**************************************************************
:Play
(
echo Play "%~1"
echo Sub Play(URL^)
echo  Dim Sound
echo  Set Sound = CreateObject("WMPlayer.OCX"^)
echo  Sound.URL = URL
echo  Sound.settings.volume = 100
echo  Sound.Controls.play
echo  do while Sound.currentmedia.duration = 0
echo   wscript.sleep 100
echo  loop
echo  wscript.sleep (int(Sound.currentmedia.duration^)+1^)*1000
echo End Sub
)>%~2
exit /b
::**************************************************************
:Stop_Radio
Taskkill /IM "wscript.exe" /F >nul 2>&1
::**************************************************************

Android Room插入所有问题

2 个答案: