AnimatorSet class return RuntimeException（“Stub！”）

我试图制作一个android FAB动画工具栏。我使用这个例子https://github.com/vpaliyX/FAB-Toolbar-Example来检查它是如何工作的，但我注意到一件奇怪的事情。克隆示例中的AnimatorSet类看起来很好，但是当我试图在我的项目中打开它时，我已经得到了这个。这是执行还是进口问题？AnimatorSet class return RuntimeException（“Stub！”）

package android.animation; 

import android.animation.Animator; 
import android.animation.TimeInterpolator; 
import java.util.ArrayList; 
import java.util.Collection; 
import java.util.List; 

public final class AnimatorSet extends Animator { 
    public AnimatorSet() { 
     throw new RuntimeException("Stub!"); 
    } 

    public void playTogether(Animator... items) { 
     throw new RuntimeException("Stub!"); 
    } 

    public void playTogether(Collection<Animator> items) { 
     throw new RuntimeException("Stub!"); 
    } 

    public void playSequentially(Animator... items) { 
     throw new RuntimeException("Stub!"); 
    } 

    public void playSequentially(List<Animator> items) { 
     throw new RuntimeException("Stub!"); 
    } 

    public ArrayList<Animator> getChildAnimations() { 
     throw new RuntimeException("Stub!"); 
    } 

    public void setTarget(Object target) { 
     throw new RuntimeException("Stub!"); 
    } 

    public void setInterpolator(TimeInterpolator interpolator) { 
     throw new RuntimeException("Stub!"); 
    } 

    public TimeInterpolator getInterpolator() { 
     throw new RuntimeException("Stub!"); 
    } 

    public AnimatorSet.Builder play(Animator anim) { 
     throw new RuntimeException("Stub!"); 
    } 

    public void cancel() { 
     throw new RuntimeException("Stub!"); 
    } 

    public void end() { 
     throw new RuntimeException("Stub!"); 
    } 

    public boolean isRunning() { 
     throw new RuntimeException("Stub!"); 
    } 

    public boolean isStarted() { 
     throw new RuntimeException("Stub!"); 
    } 

    public long getStartDelay() { 
     throw new RuntimeException("Stub!"); 
    } 

    public void setStartDelay(long startDelay) { 
     throw new RuntimeException("Stub!"); 
    } 

    public long getDuration() { 
     throw new RuntimeException("Stub!"); 
    } 

    public AnimatorSet setDuration(long duration) { 
     throw new RuntimeException("Stub!"); 
    } 

    public void setupStartValues() { 
     throw new RuntimeException("Stub!"); 
    } 

    public void setupEndValues() { 
     throw new RuntimeException("Stub!"); 
    } 

    public void pause() { 
     throw new RuntimeException("Stub!"); 
    } 

    public void resume() { 
     throw new RuntimeException("Stub!"); 
    } 

    public void start() { 
     throw new RuntimeException("Stub!"); 
    } 

    public AnimatorSet clone() { 
     throw new RuntimeException("Stub!"); 
    } 

    public String toString() { 
     throw new RuntimeException("Stub!"); 
    } 

    public long getTotalDuration() { 
     throw new RuntimeException("Stub!"); 
    } 

    public class Builder { 
     Builder() { 
      throw new RuntimeException("Stub!"); 
     } 

     public AnimatorSet.Builder with(Animator anim) { 
      throw new RuntimeException("Stub!"); 
     } 

     public AnimatorSet.Builder before(Animator anim) { 
      throw new RuntimeException("Stub!"); 
     } 

     public AnimatorSet.Builder after(Animator anim) { 
      throw new RuntimeException("Stub!"); 
     } 

     public AnimatorSet.Builder after(long delay) { 
      throw new RuntimeException("Stub!"); 
     } 
    } 
}

来源

2017-02-17 Expiredmind

您的IDE正在反编译框架类（'android.animation.AnimatorSet'）。真正的实现在运行时链接（例如，[7.1.1的版本]（https://github.com/android/platform_frameworks_base/blob/android-7.1.1_r22/core/java/android/animation/AnimatorSet.java））。 – CommonsWare

那么它在这种情况下是否正确？奇怪的是，在一个项目中，它反编译课程，但在其他项目中没有。 – Expiredmind

“有什么奇怪的是，在一个项目中反编译类，但在另一个项目中” - 您可能没有从SDK Manager中下载所有Android版本的源代码。 – CommonsWare

如果您希望查看android框架类的来源，那么您需要从SDK管理器中下载它们。打开SDK管理器，找“Android的源代码x”，其中x是您正在开发并下载的Android版本。

来源

2017-02-17 14:16:52

AnimatorSet class return RuntimeException（“Stub！”）

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