Andoridx Room rx问题 [英] Andoridx Room rx issue

问题描述

我开始使用支持io.reactivex返回类型的最新androidx.room版本.

I'm start to use latest androidx.room version that support io.reactivex return type.

dependencies {
    def room_version = "2.1.0-alpha02"
    implementation "androidx.room:room-rxjava2:$room_version"
    kapt "androidx.room:room-compiler:$room_version"
    testImplementation "androidx.room:room-testing:$room_version"
}

简单的dao类

@Dao
interface UserDao : BaseDao<UserTable> {

    @Insert(onConflict = OnConflictStrategy.IGNORE)
    fun insertUser(user: UserTable):Maybe<Long>

    @Update
    fun updateUser(user:UserTable):Completable

    @Query("DELETE FROM $USER_TABLE")
    fun clear()
}

生成UserDao_Impl.java错误

错误:从内部类内部访问本地变量用户；需要声明为最终

error: local variable user is accessed from within inner class; needs to be declared final

突出显示的字段就是这种方法

Highlighted field is in this method

  @Override
  public Maybe<Long> insertUser(UserTable user) {
    return Maybe.fromCallable(new Callable<Long>() {
     @Override
     public Long call() throws Exception {
       __db.beginTransaction();
        try {
          long _result = 
           __insertionAdapterOfUserTable.insertAndReturnId(user);//error line
           __db.setTransactionSuccessful();
         return _result;
        } finally {
         __db.endTransaction();
        }
      }
    });
  }

的确，(UserTable user)应该在Java中声明为final，但它是生成的类. 有没有人遇到过这个?

It's true that (UserTable user) should be declared as final in java but it is generated class. Does any one came across this?

推荐答案

我遇到了同样的问题.通过添加

I had the same problem. Solved it by adding

compileOptions {
  sourceCompatibility JavaVersion.VERSION_1_8
  targetCompatibility JavaVersion.VERSION_1_8
}

在build.gradle中

in build.gradle

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