我有以下使用新的数据绑定库用Java编写的片段类
import com.example.app.databinding.FragmentDataBdinding;
public class DataFragment extends Fragment {
@Nullable
private FragmentDataBinding mBinding;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
mBinding = DataBindingUtil.inflate(inflater, R.layout.fragment_data, container, false);
return mBinding.getRoot();
}
}
它可以编译并运行良好。
我试图用Kotlin重写它,并提出了以下内容:
import com.example.app.databinding.FragmentDataBdinding
class ProfileFragment : Fragment() {
private var mBinding: FragmentDataBinding? = null
override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? {
mBinding = DataBindingUtil.inflate(inflater, R.layout.fragment_data, container, false)
return mBinding!!.getRoot()
}
}
但是现在步骤:app:compileDebugKotlin
输出以下内容:
错误:(16,38)未解析的引用:数据绑定
错误:(37,27)未解析的引用:FragmentDataBinding
如何在Kotlin中使用android-databinding库?
我的最高层build.gradle
:
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.3.0'
classpath 'com.android.databinding:dataBinder:1.0-rc4'
}
}
allprojects {
repositories {
jcenter()
}
}
我build.gradle
的应用程序目录(仅相关部分):
apply plugin: 'com.android.application'
apply plugin: 'com.android.databinding'
apply plugin: 'kotlin-android'
dependencies {
compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
}
buildscript {
ext.kotlin_version = '0.14.451'
repositories {
mavenCentral()
}
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
}
}
repositories {
mavenCentral()
maven {
url 'http://oss.sonatype.org/content/repositories/snapshots'
}
}
我正在使用Android Studio 1.4,Build工具版本23.0.1,Android SDK 23,SDK工具24.4.0
apply plugin: 'kotlin-kapt'
最新版本的应用程序gradle文件即可。