小编Lun*_*lpo的帖子

我尝试将junit,mokito和powermock设置在一起,但是当我运行测试时,我得到了ClassNotFoundException :(

testCompile 'junit:junit:4.12'
testCompile 'org.mockito:mockito-core:2.7.22'
androidTestCompile 'org.mockito:mockito-core:2.7.22'
androidTestCompile "org.mockito:mockito-android:2.7.22"

testCompile 'org.robolectric:robolectric:3.3.2'
testCompile 'org.hamcrest:hamcrest-core:1.3'

testCompile 'org.powermock:powermock-core:1.6.6'
testCompile 'org.powermock:powermock-module-junit4:1.6.6'
testCompile 'org.powermock:powermock-module-junit4-rule:1.6.6'
testCompile 'org.powermock:powermock-api-mockito:1.6.6'
testCompile 'org.powermock:powermock-classloading-xstream:1.6.6'`

我还尝试添加cglib:

testCompile 'cglib:cglib:3.1'
testCompile 'cglib:cglib-nodep:3.1'

但没有缺乏.

任何人都可以分享工作配置或指出我的错误.

我运行测试时的堆栈跟踪:

Exception in thread "main" java.lang.NoClassDefFoundError: org/mockito/exceptions/Reporter
    at sun.reflect.GeneratedSerializationConstructorAccessor5.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.objenesis.instantiator.sun.SunReflectionFactoryInstantiator.newInstance(SunReflectionFactoryInstantiator.java:48)
    at org.powermock.reflect.internal.WhiteboxImpl.newInstance(WhiteboxImpl.java:251)
    at org.powermock.reflect.Whitebox.newInstance(Whitebox.java:139)
    at org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.getInstanceForClassLoader(AbstractMockingFrameworkReporterFactory.java:41)
    at org.powermock.api.extension.reporter.AbstractMockingFrameworkReporterFactory.create(AbstractMockingFrameworkReporterFactory.java:35)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.getMockingFrameworkReporter(JUnit4TestSuiteChunkerImpl.java:140)
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:119)
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
    at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:59)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498) …

我开发了基于android数据绑定库的应用程序:https://developer.android.com/topic/libraries/data-binding/index.html

class SignInViewModel extends BaseObservable {

    @Bindable
    public String getLogin() {
        return login;
    }

    @Bindable
    public String getPassword() {
        return password;
    }
}

现在我想使用新库中的ViewModelProviders:https: //developer.android.com/topic/libraries/architecture/guide.html

SignInViewModel signInViewModel = ViewModelProviders.of(this).get(SignInViewModel.class);

它如何结合？任何的想法？或者应该结合这两个库？

编辑

我改为:

class SignInViewModel extends ViewModel {
   public ObservableField<String> login = new ObservableField<>("");

    public ObservableField<String> password = new ObservableField<>("");
}

现在编译,但问题是:它是正确的方式？

我有两种类型FooApi和FooModel：

class FooApi (var aId) 
class FooModel(var mId)

是一种简化以下FooModel基于FooApi列表过滤列表的功能的方法：

fun f(fooModelList: List<FooModel>, fooApiList: List<FooApi>) : List<FooModel> {
  return fooModelList.filter { fooApiList.map { it.aId }.contains ( it.mId ) }
}

如果我有如下布局,如何使用kotlin合成扩展访问视图:

文件:two_days_view.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <include
        android:id="@+id/day1"
        layout="@layout/day_row"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <include
        android:id="@+id/day2"
        layout="@layout/day_row"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

file:day_row.xml

   <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"       >

        <TextView
            android:id="@+id/dayName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

    </LinearLayout>

如何访问dayName？我找了一些这样的:

day1.dayName.text = "xxx"
day2.dayName.text = "sss"

我在Studio中看到我有权访问dayName但是dayName TextView引用了哪一个？

正常,如果我只有一个包含的布局,它工作正常.但现在我有多次包含相同的布局.

我当然可以这样做:

day1.findViewById(R.id.dayName).text = "xxx"

但我正在寻找好的解决方案.:)

我试图弄清楚如何以最佳方式完成ViewModel中的Activity.我找到了使用LiveData对象并发出"信号"的一种方法.

我怀疑这个解决方案有一个开销.那么它是正确的解决方案还是我应该使用更准确？

所以举个例子:让我们假设在一个应用程序中是一个活动MainActivity和视图模型,如下所示:

 class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val model = ViewModelProviders.of(this).get(MainViewModel::class.java)

        model.shouldCloseLiveData.observe(this, Observer { finish() })

    }
 }

并且作为MainActivity的伴侣是MainViewModel,如下所示:

class MainViewModel(app: Application) : AndroidViewModel(app) {

  val shouldCloseLiveData = MutableLiveData<Void>()

  fun someAction(){
    shouldCloseLiveData.postValue(null)
  }

}

We are trying to implement paging in Leanback VerticalGridSupportFragment with Architecture Components Paging Library. Leanback on it's own doesn't have any sort of out-of-box compatibility with Paging Library so we extended it's ObjectAdapter class and managed to implement append and clear operations quite easily but we are having a hard time trying to make modify operation work. During content modification operation, Paging Library's PagedList class computes the diff using AsyncPagedListDiffer which internally uses PagedStorageDiffHelper which is a package-private class and …

我需要将对象序列化为String并反序列化.

我在stackoverflow上重写sugestion并生成以下代码:

class Data implements Serializable {
int x = 5;
int y = 3;   
}

public class Test {
public static void main(String[] args) {

    Data data = new Data();

    String out;

    try {
        // zapis
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);

        oos.writeObject(data);

        out = new String(baos.toByteArray());
        System.out.println(out);

        // odczyt.==========================================

        ByteArrayInputStream bais = new ByteArrayInputStream(out.getBytes());

        ObjectInputStream ois = new ObjectInputStream(bais);

        Data d = (Data) ois.readObject();

        System.out.println("d.x = " + d.x);
        System.out.println("d.y = " + d.y); …

我有 3 行代码可以从 OkHttp3 源获取正文：

val responseBody = response.peekBody(response.body()!!.contentLength())
val source = GzipSource(responseBody.source())
val body = Okio.buffer(source).readUtf8() //issue is that line

在另一台计算机上，我收到错误消息：“使用 'buffer(Source): BufferedSource' 是一个错误。移动到扩展功能”

所以通过替换最后一行来修复它：

val body = source.buffer().readUtf8()

现在在第一台计算机上的 bun 我有错误：“未解析的引用：缓冲区”所以我需要恢复该更改。

怎么了？根据错误消息我无法弄清楚。似乎是 gradle 配置的问题。但是什么？如何在两台计算机上编译代码。

我尝试为 google 制作视差滚动效果MapView并RecycleView使用CoordinatorLayour.

所以基于在网上找到的一些教程，我做了下面的代码。

布局：

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <com.google.android.gms.maps.MapView android:id="@+id/map_view"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        app:layout_behavior="net.lunavulpo.coordinatorlayouttest.MapViewBehavior"
        />

    <android.support.v7.widget.RecyclerView
        android:id="@+id/my_recycler_view"
        android:layout_width="match_parent"
        android:layout_marginTop="200dp"
        android:layout_height="match_parent"/>

</android.support.design.widget.CoordinatorLayout>

我实现了CoordinatorLayout.Behavior：

    public class MapViewBehavior extends CoordinatorLayout.Behavior<MapView> {

        public MapViewBehavior(Context context, AttributeSet attrs) {
        }

        @Override
        public boolean layoutDependsOn(CoordinatorLayout parent, MapView child, View dependency) {
            return true;
        }

        @Override
        public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, MapView child, View directTargetChild, View target, int nestedScrollAxes) {
            return true;
        }

        @Override …

我将当前的整体模块拆分为几个模块：:app、:ui、:base。

我:ui使用模块中的类在模块中编写了测试:base。

class FooTest : BaseTest {

@Test
fun fooTest() {}
}

soBaseTest在:base模块中，但 :ui 模块依赖于:base. 所以 AS 向我表明这是可以的。

在 :ui 模块的 gradle 文件中：

dependences {

   implementation project(":base")
}

但是当测试运行时我得到：

BaseTest: Unresolved reference: BaseTest

我尝试添加：

   testImplementation project(":base")

或者

   androidTestImplementation project(":base")

但不能解决问题。:(