Android Room Java内部连接与计数

我正在用java编写一个android应用程序，使用Room来管理数据

我想返回一个数据库（contacts_表）中的所有项目，以及另一个表（emails_表）中的相关项目的相应计数，以便在回收器视图中使用

i、 e.我希望用户在“回收者”视图的每个布局中查看他们从联系人那里收到的电子邮件数量

当我测试运行我的应用程序时，出现以下错误：

error: There is a problem with the query: [SQLITE_ERROR] SQL error or missing database (no such table: emails_table)

在这一行代码中：

    @Query("SELECT  e.emails_count, c.* " +
            "FROM contacts_table c " +
            "INNER JOIN ( " +
            "   SELECT email_to, COUNT(email_to) emails_count " +
            "   FROM emails_table " +
            "   GROUP BY email_to) e " +
            "ON e.email_to = c.email_to")

我想做的事可能吗

联系人\u表实体：

@Entity(tableName = "contacts_table")
public class ContactEntity {

    @PrimaryKey(autoGenerate = true)
    private int id;

    @ColumnInfo(name = "email_token")
    private String emailToken;

    @ColumnInfo(name = "email_to")
    private String emailTo;

    private String password;

    @ColumnInfo(name = "contact_name")
    private String contactName;

    public ContactEntity(String emailToken, String password, String contactName) {
        this.emailToken = emailToken;
        this.password = password;
        this.contactName = contactName;
    }

    public int getId() {
        return id;
    }

    public String getEmailToken() {
        return emailToken;
    }

    public String getPassword() {
        return password;
    }

    public String getContactName() {
        return contactName;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setEmailToken(String emailToken) {
        this.emailToken = emailToken;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public void setContactName(String contactName) {
        this.contactName = contactName;
    }


    public String getEmailTo() {
        return emailTo;
    }

    public void setEmailTo(String emailTo) {
        this.emailTo = emailTo;
    }

}

import androidx.lifecycle.LiveData;
import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.OnConflictStrategy;
import androidx.room.Query;
import androidx.room.Update;

import java.util.List;

@Dao
public interface ContactsDao {
    @Insert(onConflict = OnConflictStrategy.IGNORE)
    void insert(ContactEntity contactEntity);

    @Update
    void update(ContactEntity contactEntity);

    @Delete
    void delete(ContactEntity contactEntity);
//
    @Query("SELECT  e.emails_count, c.* " +
            "FROM contacts_table c " +
            "INNER JOIN ( " +
            "   SELECT email_to, COUNT(email_to) emails_count " +
            "   FROM emails_table " +
            "   GROUP BY email_to) e " +
            "ON e.email_to = c.email_to")
    LiveData<List<ContactEntity>> getAllContacts();

    @Query("DELETE FROM contacts_table")
    void deleteAllContacts();

}

import androidx.room.ColumnInfo;
import androidx.room.Entity;
import androidx.room.PrimaryKey;

import java.util.Date;
import java.sql.Time;

@Entity(tableName = "emails_table")
public class EmailEntity {

    @PrimaryKey(autoGenerate = true)
    private int id;

    @ColumnInfo(name = "email_from")
    private String emailFrom;

    @ColumnInfo(name = "email_to")
    private String emailTo;

    @ColumnInfo(name = "email_subject")
    private String emailSubject;

    @ColumnInfo(name = "email_body")
    private String emailBody;

    @ColumnInfo(name = "email_date")
    private Date dateReceived;

    @ColumnInfo(name = "email_time")
    private Time timeReceived;

    @ColumnInfo(name = "email_filename")
    private String filename;

    @ColumnInfo(name = "email_archive")
    private Boolean isArchived;

    @ColumnInfo(name = "email_token")
    private String emailToken;

    public EmailEntity(String emailFrom, String emailTo, String emailBody, Date dateReceived, Time timeReceived, String filename, Boolean isArchived, String emailSubject) {
        this.emailFrom = emailFrom;
        this.emailTo = emailTo;
        this.emailBody = emailBody;
        this.dateReceived = dateReceived;
        this.timeReceived = timeReceived;
        this.filename = filename;
        this.isArchived = isArchived;
        this.emailSubject = emailSubject;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getEmailFrom() {
        return emailFrom;
    }

    public void setEmailFrom(String emailFrom) {
        this.emailFrom = emailFrom;
    }

    public String getEmailTo() {
        return emailTo;
    }

    public void setEmailTo(String emailTo) {
        this.emailTo = emailTo;
    }

    public String getEmailBody() {
        return emailBody;
    }

    public void setEmailBody(String emailBody) {
        this.emailBody = emailBody;
    }

    public Date getDateReceived() {
        return dateReceived;
    }

    public void setDateReceived(Date dateReceived) {
        this.dateReceived = dateReceived;
    }

    public String getFilename() {
        return filename;
    }

    public void setFilename(String filename) {
        this.filename = filename;
    }

    public Boolean getArchived() {
        return isArchived;
    }

    public void setArchived(Boolean archived) {
        isArchived = archived;
    }

    public String getEmailToken() {
        return emailToken;
    }

    public void setEmailToken(String emailToken) {
        this.emailToken = emailToken;
    }

    public String getEmailSubject() {
        return emailSubject;
    }

    public void setEmailSubject(String emailSubject) {
        this.emailSubject = emailSubject;
    }


    public Time getTimeReceived() {
        return timeReceived;
    }

    public void setTimeReceived(Time timeReceived) {
        this.timeReceived = timeReceived;
    }
}

import androidx.lifecycle.LiveData;
import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.OnConflictStrategy;
import androidx.room.Query;
import androidx.room.Update;

import java.util.List;

@Dao
public interface EmailsDao {
    @Insert(onConflict = OnConflictStrategy.REPLACE)
    void insert(EmailEntity emailEntity);

    @Update
    void update(EmailEntity emailEntity);

    @Delete
    void delete(EmailEntity emailEntity);

    @Query("SELECT * FROM emails_table ORDER BY email_date")
    LiveData<List<EmailEntity>> getAllEmails();

    @Query("DELETE FROM emails_table")
    void deleteAllEmails();

}

联系人\u dao:

@Entity(tableName = "contacts_table")
public class ContactEntity {

    @PrimaryKey(autoGenerate = true)
    private int id;

    @ColumnInfo(name = "email_token")
    private String emailToken;

    @ColumnInfo(name = "email_to")
    private String emailTo;

    private String password;

    @ColumnInfo(name = "contact_name")
    private String contactName;

    public ContactEntity(String emailToken, String password, String contactName) {
        this.emailToken = emailToken;
        this.password = password;
        this.contactName = contactName;
    }

    public int getId() {
        return id;
    }

    public String getEmailToken() {
        return emailToken;
    }

    public String getPassword() {
        return password;
    }

    public String getContactName() {
        return contactName;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setEmailToken(String emailToken) {
        this.emailToken = emailToken;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public void setContactName(String contactName) {
        this.contactName = contactName;
    }


    public String getEmailTo() {
        return emailTo;
    }

    public void setEmailTo(String emailTo) {
        this.emailTo = emailTo;
    }

}

import androidx.lifecycle.LiveData;
import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.OnConflictStrategy;
import androidx.room.Query;
import androidx.room.Update;

import java.util.List;

@Dao
public interface ContactsDao {
    @Insert(onConflict = OnConflictStrategy.IGNORE)
    void insert(ContactEntity contactEntity);

    @Update
    void update(ContactEntity contactEntity);

    @Delete
    void delete(ContactEntity contactEntity);
//
    @Query("SELECT  e.emails_count, c.* " +
            "FROM contacts_table c " +
            "INNER JOIN ( " +
            "   SELECT email_to, COUNT(email_to) emails_count " +
            "   FROM emails_table " +
            "   GROUP BY email_to) e " +
            "ON e.email_to = c.email_to")
    LiveData<List<ContactEntity>> getAllContacts();

    @Query("DELETE FROM contacts_table")
    void deleteAllContacts();

}

import androidx.room.ColumnInfo;
import androidx.room.Entity;
import androidx.room.PrimaryKey;

import java.util.Date;
import java.sql.Time;

@Entity(tableName = "emails_table")
public class EmailEntity {

    @PrimaryKey(autoGenerate = true)
    private int id;

    @ColumnInfo(name = "email_from")
    private String emailFrom;

    @ColumnInfo(name = "email_to")
    private String emailTo;

    @ColumnInfo(name = "email_subject")
    private String emailSubject;

    @ColumnInfo(name = "email_body")
    private String emailBody;

    @ColumnInfo(name = "email_date")
    private Date dateReceived;

    @ColumnInfo(name = "email_time")
    private Time timeReceived;

    @ColumnInfo(name = "email_filename")
    private String filename;

    @ColumnInfo(name = "email_archive")
    private Boolean isArchived;

    @ColumnInfo(name = "email_token")
    private String emailToken;

    public EmailEntity(String emailFrom, String emailTo, String emailBody, Date dateReceived, Time timeReceived, String filename, Boolean isArchived, String emailSubject) {
        this.emailFrom = emailFrom;
        this.emailTo = emailTo;
        this.emailBody = emailBody;
        this.dateReceived = dateReceived;
        this.timeReceived = timeReceived;
        this.filename = filename;
        this.isArchived = isArchived;
        this.emailSubject = emailSubject;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getEmailFrom() {
        return emailFrom;
    }

    public void setEmailFrom(String emailFrom) {
        this.emailFrom = emailFrom;
    }

    public String getEmailTo() {
        return emailTo;
    }

    public void setEmailTo(String emailTo) {
        this.emailTo = emailTo;
    }

    public String getEmailBody() {
        return emailBody;
    }

    public void setEmailBody(String emailBody) {
        this.emailBody = emailBody;
    }

    public Date getDateReceived() {
        return dateReceived;
    }

    public void setDateReceived(Date dateReceived) {
        this.dateReceived = dateReceived;
    }

    public String getFilename() {
        return filename;
    }

    public void setFilename(String filename) {
        this.filename = filename;
    }

    public Boolean getArchived() {
        return isArchived;
    }

    public void setArchived(Boolean archived) {
        isArchived = archived;
    }

    public String getEmailToken() {
        return emailToken;
    }

    public void setEmailToken(String emailToken) {
        this.emailToken = emailToken;
    }

    public String getEmailSubject() {
        return emailSubject;
    }

    public void setEmailSubject(String emailSubject) {
        this.emailSubject = emailSubject;
    }


    public Time getTimeReceived() {
        return timeReceived;
    }

    public void setTimeReceived(Time timeReceived) {
        this.timeReceived = timeReceived;
    }
}

import androidx.lifecycle.LiveData;
import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.OnConflictStrategy;
import androidx.room.Query;
import androidx.room.Update;

import java.util.List;

@Dao
public interface EmailsDao {
    @Insert(onConflict = OnConflictStrategy.REPLACE)
    void insert(EmailEntity emailEntity);

    @Update
    void update(EmailEntity emailEntity);

    @Delete
    void delete(EmailEntity emailEntity);

    @Query("SELECT * FROM emails_table ORDER BY email_date")
    LiveData<List<EmailEntity>> getAllEmails();

    @Query("DELETE FROM emails_table")
    void deleteAllEmails();

}

电子邮件地址：

@Entity(tableName = "contacts_table")
public class ContactEntity {

    @PrimaryKey(autoGenerate = true)
    private int id;

    @ColumnInfo(name = "email_token")
    private String emailToken;

    @ColumnInfo(name = "email_to")
    private String emailTo;

    private String password;

    @ColumnInfo(name = "contact_name")
    private String contactName;

    public ContactEntity(String emailToken, String password, String contactName) {
        this.emailToken = emailToken;
        this.password = password;
        this.contactName = contactName;
    }

    public int getId() {
        return id;
    }

    public String getEmailToken() {
        return emailToken;
    }

    public String getPassword() {
        return password;
    }

    public String getContactName() {
        return contactName;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setEmailToken(String emailToken) {
        this.emailToken = emailToken;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public void setContactName(String contactName) {
        this.contactName = contactName;
    }


    public String getEmailTo() {
        return emailTo;
    }

    public void setEmailTo(String emailTo) {
        this.emailTo = emailTo;
    }

}

import androidx.lifecycle.LiveData;
import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.OnConflictStrategy;
import androidx.room.Query;
import androidx.room.Update;

import java.util.List;

@Dao
public interface ContactsDao {
    @Insert(onConflict = OnConflictStrategy.IGNORE)
    void insert(ContactEntity contactEntity);

    @Update
    void update(ContactEntity contactEntity);

    @Delete
    void delete(ContactEntity contactEntity);
//
    @Query("SELECT  e.emails_count, c.* " +
            "FROM contacts_table c " +
            "INNER JOIN ( " +
            "   SELECT email_to, COUNT(email_to) emails_count " +
            "   FROM emails_table " +
            "   GROUP BY email_to) e " +
            "ON e.email_to = c.email_to")
    LiveData<List<ContactEntity>> getAllContacts();

    @Query("DELETE FROM contacts_table")
    void deleteAllContacts();

}

import androidx.room.ColumnInfo;
import androidx.room.Entity;
import androidx.room.PrimaryKey;

import java.util.Date;
import java.sql.Time;

@Entity(tableName = "emails_table")
public class EmailEntity {

    @PrimaryKey(autoGenerate = true)
    private int id;

    @ColumnInfo(name = "email_from")
    private String emailFrom;

    @ColumnInfo(name = "email_to")
    private String emailTo;

    @ColumnInfo(name = "email_subject")
    private String emailSubject;

    @ColumnInfo(name = "email_body")
    private String emailBody;

    @ColumnInfo(name = "email_date")
    private Date dateReceived;

    @ColumnInfo(name = "email_time")
    private Time timeReceived;

    @ColumnInfo(name = "email_filename")
    private String filename;

    @ColumnInfo(name = "email_archive")
    private Boolean isArchived;

    @ColumnInfo(name = "email_token")
    private String emailToken;

    public EmailEntity(String emailFrom, String emailTo, String emailBody, Date dateReceived, Time timeReceived, String filename, Boolean isArchived, String emailSubject) {
        this.emailFrom = emailFrom;
        this.emailTo = emailTo;
        this.emailBody = emailBody;
        this.dateReceived = dateReceived;
        this.timeReceived = timeReceived;
        this.filename = filename;
        this.isArchived = isArchived;
        this.emailSubject = emailSubject;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getEmailFrom() {
        return emailFrom;
    }

    public void setEmailFrom(String emailFrom) {
        this.emailFrom = emailFrom;
    }

    public String getEmailTo() {
        return emailTo;
    }

    public void setEmailTo(String emailTo) {
        this.emailTo = emailTo;
    }

    public String getEmailBody() {
        return emailBody;
    }

    public void setEmailBody(String emailBody) {
        this.emailBody = emailBody;
    }

    public Date getDateReceived() {
        return dateReceived;
    }

    public void setDateReceived(Date dateReceived) {
        this.dateReceived = dateReceived;
    }

    public String getFilename() {
        return filename;
    }

    public void setFilename(String filename) {
        this.filename = filename;
    }

    public Boolean getArchived() {
        return isArchived;
    }

    public void setArchived(Boolean archived) {
        isArchived = archived;
    }

    public String getEmailToken() {
        return emailToken;
    }

    public void setEmailToken(String emailToken) {
        this.emailToken = emailToken;
    }

    public String getEmailSubject() {
        return emailSubject;
    }

    public void setEmailSubject(String emailSubject) {
        this.emailSubject = emailSubject;
    }


    public Time getTimeReceived() {
        return timeReceived;
    }

    public void setTimeReceived(Time timeReceived) {
        this.timeReceived = timeReceived;
    }
}

import androidx.lifecycle.LiveData;
import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.OnConflictStrategy;
import androidx.room.Query;
import androidx.room.Update;

import java.util.List;

@Dao
public interface EmailsDao {
    @Insert(onConflict = OnConflictStrategy.REPLACE)
    void insert(EmailEntity emailEntity);

    @Update
    void update(EmailEntity emailEntity);

    @Delete
    void delete(EmailEntity emailEntity);

    @Query("SELECT * FROM emails_table ORDER BY email_date")
    LiveData<List<EmailEntity>> getAllEmails();

    @Query("DELETE FROM emails_table")
    void deleteAllEmails();

}

编辑1:

@Entity(tableName = "contacts_table")
public class ContactEntity {

    @PrimaryKey(autoGenerate = true)
    private int id;

    @ColumnInfo(name = "email_token")
    private String emailToken;

    @ColumnInfo(name = "email_to")
    private String emailTo;

    private String password;

    @ColumnInfo(name = "contact_name")
    private String contactName;

    public ContactEntity(String emailToken, String password, String contactName) {
        this.emailToken = emailToken;
        this.password = password;
        this.contactName = contactName;
    }

    public int getId() {
        return id;
    }

    public String getEmailToken() {
        return emailToken;
    }

    public String getPassword() {
        return password;
    }

    public String getContactName() {
        return contactName;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setEmailToken(String emailToken) {
        this.emailToken = emailToken;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public void setContactName(String contactName) {
        this.contactName = contactName;
    }


    public String getEmailTo() {
        return emailTo;
    }

    public void setEmailTo(String emailTo) {
        this.emailTo = emailTo;
    }

}

import androidx.lifecycle.LiveData;
import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.OnConflictStrategy;
import androidx.room.Query;
import androidx.room.Update;

import java.util.List;

@Dao
public interface ContactsDao {
    @Insert(onConflict = OnConflictStrategy.IGNORE)
    void insert(ContactEntity contactEntity);

    @Update
    void update(ContactEntity contactEntity);

    @Delete
    void delete(ContactEntity contactEntity);
//
    @Query("SELECT  e.emails_count, c.* " +
            "FROM contacts_table c " +
            "INNER JOIN ( " +
            "   SELECT email_to, COUNT(email_to) emails_count " +
            "   FROM emails_table " +
            "   GROUP BY email_to) e " +
            "ON e.email_to = c.email_to")
    LiveData<List<ContactEntity>> getAllContacts();

    @Query("DELETE FROM contacts_table")
    void deleteAllContacts();

}

import androidx.room.ColumnInfo;
import androidx.room.Entity;
import androidx.room.PrimaryKey;

import java.util.Date;
import java.sql.Time;

@Entity(tableName = "emails_table")
public class EmailEntity {

    @PrimaryKey(autoGenerate = true)
    private int id;

    @ColumnInfo(name = "email_from")
    private String emailFrom;

    @ColumnInfo(name = "email_to")
    private String emailTo;

    @ColumnInfo(name = "email_subject")
    private String emailSubject;

    @ColumnInfo(name = "email_body")
    private String emailBody;

    @ColumnInfo(name = "email_date")
    private Date dateReceived;

    @ColumnInfo(name = "email_time")
    private Time timeReceived;

    @ColumnInfo(name = "email_filename")
    private String filename;

    @ColumnInfo(name = "email_archive")
    private Boolean isArchived;

    @ColumnInfo(name = "email_token")
    private String emailToken;

    public EmailEntity(String emailFrom, String emailTo, String emailBody, Date dateReceived, Time timeReceived, String filename, Boolean isArchived, String emailSubject) {
        this.emailFrom = emailFrom;
        this.emailTo = emailTo;
        this.emailBody = emailBody;
        this.dateReceived = dateReceived;
        this.timeReceived = timeReceived;
        this.filename = filename;
        this.isArchived = isArchived;
        this.emailSubject = emailSubject;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getEmailFrom() {
        return emailFrom;
    }

    public void setEmailFrom(String emailFrom) {
        this.emailFrom = emailFrom;
    }

    public String getEmailTo() {
        return emailTo;
    }

    public void setEmailTo(String emailTo) {
        this.emailTo = emailTo;
    }

    public String getEmailBody() {
        return emailBody;
    }

    public void setEmailBody(String emailBody) {
        this.emailBody = emailBody;
    }

    public Date getDateReceived() {
        return dateReceived;
    }

    public void setDateReceived(Date dateReceived) {
        this.dateReceived = dateReceived;
    }

    public String getFilename() {
        return filename;
    }

    public void setFilename(String filename) {
        this.filename = filename;
    }

    public Boolean getArchived() {
        return isArchived;
    }

    public void setArchived(Boolean archived) {
        isArchived = archived;
    }

    public String getEmailToken() {
        return emailToken;
    }

    public void setEmailToken(String emailToken) {
        this.emailToken = emailToken;
    }

    public String getEmailSubject() {
        return emailSubject;
    }

    public void setEmailSubject(String emailSubject) {
        this.emailSubject = emailSubject;
    }


    public Time getTimeReceived() {
        return timeReceived;
    }

    public void setTimeReceived(Time timeReceived) {
        this.timeReceived = timeReceived;
    }
}

import androidx.lifecycle.LiveData;
import androidx.room.Dao;
import androidx.room.Delete;
import androidx.room.Insert;
import androidx.room.OnConflictStrategy;
import androidx.room.Query;
import androidx.room.Update;

import java.util.List;

@Dao
public interface EmailsDao {
    @Insert(onConflict = OnConflictStrategy.REPLACE)
    void insert(EmailEntity emailEntity);

    @Update
    void update(EmailEntity emailEntity);

    @Delete
    void delete(EmailEntity emailEntity);

    @Query("SELECT * FROM emails_table ORDER BY email_date")
    LiveData<List<EmailEntity>> getAllEmails();

    @Query("DELETE FROM emails_table")
    void deleteAllEmails();

}

这是生成输出中的堆栈轨迹：

Executing tasks: [:app:assembleDebug] in project /home/xxx/AndroidStudioProjects/email_token

> Task :app:preBuild UP-TO-DATE
> Task :app:preDebugBuild UP-TO-DATE
> Task :app:compileDebugAidl NO-SOURCE
> Task :app:checkDebugManifest UP-TO-DATE
> Task :app:generateDebugBuildConfig UP-TO-DATE
> Task :app:compileDebugRenderscript NO-SOURCE
> Task :app:javaPreCompileDebug UP-TO-DATE
> Task :app:mainApkListPersistenceDebug UP-TO-DATE
> Task :app:generateDebugResValues UP-TO-DATE
> Task :app:generateDebugResources UP-TO-DATE
> Task :app:mergeDebugResources UP-TO-DATE
> Task :app:createDebugCompatibleScreenManifests UP-TO-DATE
> Task :app:processDebugManifest
> Task :app:processDebugResources

> Task :app:compileDebugJavaWithJavac FAILED
/home/xxx/AndroidStudioProjects/email_token/app/src/main/java/com/xxxxxxxxxx/email_token/ui/email_messages/ContactsDao.java:31: error: There is a problem with the query: [SQLITE_ERROR] SQL error or missing database (no such table: emails_table)
    LiveData<List<ContactEntity>> getAllContacts();
                                  ^
1 error

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

* Try:
Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:compileDebugJavaWithJavac'.
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:151)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:148)
    at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:191)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:141)
    at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionStateTaskExecuter.execute(ResolveBeforeExecutionStateTaskExecuter.java:75)
    at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:62)
    at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:108)
    at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionOutputsTaskExecuter.execute(ResolveBeforeExecutionOutputsTaskExecuter.java:67)
    at org.gradle.api.internal.tasks.execution.ResolveAfterPreviousExecutionStateTaskExecuter.execute(ResolveAfterPreviousExecutionStateTaskExecuter.java:46)
    at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:94)
    at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46)
    at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:95)
    at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)
    at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)
    at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:73)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
    at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:49)
    at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336)
    at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193)
    at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
Caused by: org.gradle.api.internal.tasks.compile.CompilationFailedException: Compilation failed; see the compiler error output for details.
    at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:52)
    at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:36)
    at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.delegateAndHandleErrors(NormalizingJavaCompiler.java:100)
    at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:52)
    at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:38)
    at org.gradle.api.internal.tasks.compile.AnnotationProcessorDiscoveringCompiler.execute(AnnotationProcessorDiscoveringCompiler.java:51)
    at org.gradle.api.internal.tasks.compile.AnnotationProcessorDiscoveringCompiler.execute(AnnotationProcessorDiscoveringCompiler.java:37)
    at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:39)
    at org.gradle.api.internal.tasks.compile.incremental.IncrementalCompilerFactory$2.execute(IncrementalCompilerFactory.java:110)
    at org.gradle.api.internal.tasks.compile.incremental.IncrementalCompilerFactory$2.execute(IncrementalCompilerFactory.java:106)
    at org.gradle.api.internal.tasks.compile.incremental.IncrementalResultStoringCompiler.execute(IncrementalResultStoringCompiler.java:60)
    at org.gradle.api.internal.tasks.compile.incremental.IncrementalResultStoringCompiler.execute(IncrementalResultStoringCompiler.java:44)
    at org.gradle.api.internal.tasks.compile.CompileJavaBuildOperationReportingCompiler$2.call(CompileJavaBuildOperationReportingCompiler.java:59)
    at org.gradle.api.internal.tasks.compile.CompileJavaBuildOperationReportingCompiler$2.call(CompileJavaBuildOperationReportingCompiler.java:51)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
    at org.gradle.api.internal.tasks.compile.CompileJavaBuildOperationReportingCompiler.execute(CompileJavaBuildOperationReportingCompiler.java:51)
    at org.gradle.api.tasks.compile.JavaCompile.performCompilation(JavaCompile.java:154)
    at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:122)
    at com.android.build.gradle.tasks.AndroidJavaCompile.compile(AndroidJavaCompile.kt:237)
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:103)
    at org.gradle.api.internal.project.taskfactory.IncrementalTaskInputsTaskAction.doExecute(IncrementalTaskInputsTaskAction.java:46)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:41)
    at org.gradle.api.internal.project.taskfactory.AbstractIncrementalTaskAction.execute(AbstractIncrementalTaskAction.java:25)
    at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:28)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$5.run(ExecuteActionsTaskExecuter.java:404)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:402)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:394)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:92)
    at org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:393)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:376)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.access$200(ExecuteActionsTaskExecuter.java:80)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.execute(ExecuteActionsTaskExecuter.java:213)
    at org.gradle.internal.execution.steps.ExecuteStep.lambda$execute$0(ExecuteStep.java:32)
    at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:32)
    at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:26)
    at org.gradle.internal.execution.steps.CleanupOutputsStep.execute(CleanupOutputsStep.java:58)
    at org.gradle.internal.execution.steps.CleanupOutputsStep.execute(CleanupOutputsStep.java:35)
    at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:48)
    at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:33)
    at org.gradle.internal.execution.steps.CancelExecutionStep.execute(CancelExecutionStep.java:39)
    at org.gradle.internal.execution.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:73)
    at org.gradle.internal.execution.steps.TimeoutStep.execute(TimeoutStep.java:54)
    at org.gradle.internal.execution.steps.CatchExceptionStep.execute(CatchExceptionStep.java:35)
    at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:51)
    at org.gradle.internal.execution.steps.SnapshotOutputsStep.execute(SnapshotOutputsStep.java:45)
    at org.gradle.internal.execution.steps.SnapshotOutputsStep.execute(SnapshotOutputsStep.java:31)
    at org.gradle.internal.execution.steps.CacheStep.executeWithoutCache(CacheStep.java:201)
    at org.gradle.internal.execution.steps.CacheStep.execute(CacheStep.java:70)
    at org.gradle.internal.execution.steps.CacheStep.execute(CacheStep.java:45)
    at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:49)
    at org.gradle.internal.execution.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:43)
    at org.gradle.internal.execution.steps.StoreSnapshotsStep.execute(StoreSnapshotsStep.java:32)
    at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:38)
    at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:24)
    at org.gradle.internal.execution.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:96)
    at org.gradle.internal.execution.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:89)
    at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:54)
    at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:38)
    at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:77)
    at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:37)
    at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:36)
    at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:26)
    at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:90)
    at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:48)
    at org.gradle.internal.execution.impl.DefaultWorkExecutor.execute(DefaultWorkExecutor.java:33)
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:120)
    ... 35 more


* Get more help at https://help.gradle.org

BUILD FAILED in 7s
10 actionable tasks: 3 executed, 7 up-to-date

在project/home/xxx/AndroidStudioProjects/email\u令牌中执行任务：[:app:assembleDebug]
>任务：应用程序：预构建最新
>任务：app:preDebugBuild-update
>任务：应用程序：CompiledBugaidl无源代码
>任务：应用程序：checkDebugManifest最新
>任务：app:generateDebugBuildConfig最新
>任务：应用程序：CompiledBugRenderScript无源代码
>任务：app:javaPreCompileDebug最新
>任务：应用程序：mainApkListPersistenceDebug最新
>任务：应用程序：生成最新的BugResValues
>任务：应用程序：生成最新的BugResources
>任务：应用程序：合并调试资源最新
>任务：应用程序：CreateDebuggCompatibleScreenManifests最新
>任务：应用程序：processDebugManifest
>任务：应用程序：processDebugResources
>任务：应用程序：CompiledBugJavaWithJavaC失败
/home/xxx/AndroidStudioProjects/email\u-token/app/src/main/java/com/xxxxxxxxx/email\u-token/ui/email\u-messages/ContactsDao.java:31：错误：查询有问题：[SQLITE\u-error]SQL错误或缺少数据库（没有这样的表：emails\u-table）
LiveData getAllContacts（）；
^
1错误
失败：生成失败，出现异常。
*出了什么问题：
任务“：app:compiledBugJavaWithJavaC”的执行失败。
>编译失败；有关详细信息，请参阅编译器错误输出。
*尝试：
使用--info或--debug选项运行以获得更多日志输出。使用--scan运行以获得完整的洞察力。
*例外情况是：
org.gradle.api.tasks.TaskExecutionException:任务的执行失败“：app:compiledBugJavaWithJavaC”。
位于org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept（ExecuteActionsTaskExecuter.java:151）
位于org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept（ExecuteActionsTaskExecuter.java:148）
位于org.gradle.internal.Try$Failure.ifSuccessfulOrElse（Try.java:191）
位于org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute（ExecuteActionsTaskExecuter.java:141）
位于org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionStateTaskExecuter.execute（ResolveBeforeExecutionStateTaskExecuter.java:75）
位于org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute（ValidatingTaskExecuter.java:62）
位于org.gradle.api.internal.tasks.execution.skipmptysourcefilestaskexecuter.execute（skipmptysourcefilestaskexecuter.java:108）
位于org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionOutputsTaskExecuter.execute（ResolveBeforeExecutionOutputsTaskExecuter.java:67）
位于org.gradle.api.internal.tasks.execution.ResolveAfterPreviousExecutionStateTaskExecuter.execute（ResolveAfterPreviousExecutionStateTaskExecuter.java:46）
位于org.gradle.api.internal.tasks.execution.cleanupstaleoutputsecuter.execute（cleanupstaleoutputsecuter.java:94）
位于org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute（FinalizePropertiesTaskExecuter.java:46）
位于org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute（ResolveTaskExecutionModeExecuter.java:95）
位于org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute（SkipTaskWithNoActionsExecuter.java:57）
位于org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute（SkipOnlyIfTaskExecuter.java:56）
位于org.gradle.api.internal.tasks.execution.catchExceptionTaskKexecuter.execute（catchExceptionTaskKexecuter.java:36）
位于org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask（EventFiringTaskExecuter.java:73）
位于org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call（EventFiringTaskExecuter.java:52）
位于org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call（EventFiringTaskExecuter.java:49）
位于org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute（DefaultBuildOperationExecutor.java:416）
位于org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute（DefaultBuildOperationExecutor.java:406）
位于org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute（DefaultBuildOperationExecutor.java:165）
位于org.gradle.internal.operations.DefaultBuildOperationExecutor.execute（DefaultBuildOperationExecutor.java:250）
位于org.gradle.internal.operations.DefaultBuildOperationExecutor.execute（DefaultBuildOperationExecutor.java:158）
位于org.gradle.internal.operations.DefaultBuildOperationExecutor.call（DefaultBuildOperationExecutor.java:102）
在org.gradle.internal.operations.DelegatingBuildOperationExecutor.call（DelegatingBuildOperationExecutor.java:36）
位于org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute（EventFiringTaskExecuter.java:49）
位于org.gradle.execution.plan.LocalTaskNodeExecutor.execute（LocalTaskNodeExecutor.java:43）
位于org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute（DefaultTaskExecutionGraph.java:355）
位于org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute（DefaultTaskExecutionGraph.java:343）
在org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$buildOperationaWareeExecutionAction.execute（DefaultTaskExecutionGraph.java:336）
在org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$buildOperationaWareeExecutionAction.execute（DefaultTaskExecutu