android – 如何在sqlite DB浏览器中查看Room数据库的表格？

我在我的示例应用程序中使用RoomDB.我能够在DB上执行CRUD操作.但我无法查看db file.i想要在sqlite DB浏览器中查看表结构.

这是我的APPDatabase类

 @Database(entities = {User.class}, version = 1,exportSchema = false)

public abstract class AppDatabase extends RoomDatabase {

    private static AppDatabase INSTANCE;  
    public abstract UserDao userDao();        
    public static AppDatabase getAppDatabase(Context context) {
        if (INSTANCE == null) {
            INSTANCE =
                    Room.databaseBuilder(context.getApplicationContext(), AppDatabase.class, "user-database")                                
                            .allowMainThreadQueries()
                            .build();
        }
        return INSTANCE;
    }    
    public static void destroyInstance() {
        INSTANCE = null;
    }
}

帮我获取DB文件.

解决方法:

这就是我做到的.在Android Studio 3.1中,

>访问视图>工具Windows>设备文件资源管理器.
>导航到文件夹/ data / data /< your package> / databases
>保存以.db结尾的数据库文件

如果看不到数据库文件,请考虑使用以下代码复制文件

fun exportDB(context: Context){
        try {
            val sd = Environment.getExternalStorageDirectory()

            if (sd.canWrite()) {
                val backupDBPath = "database.db"
                val currentDB = context.getDatabasePath("database.db")
                val backupDB = File(sd, backupDBPath)

                val src = FileInputStream(currentDB).getChannel()
                val dst = FileOutputStream(backupDB).getChannel()
                dst.transferFrom(src, 0, src.size())
                src.close()
                dst.close()
                Log.i("database","export database done. Original path: $currentDB")
            }else{
                Log.i("database","cannot write database")
            }
        } catch (e: Exception) {
            Log.e("database","export database failed. "+e.message)
        }
    }

更新：the db file is empty, and u need .db-shm and .db-wal to open .db file.

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