java.lang.IllegalArgumentException:Rect应与子节点相交

Question

在Android Studio中启动新项目并选择Tabbed Activity之后,在构建项目后,我在Android Monitor中收到此错误:

E/AndroidRuntime: FATAL EXCEPTION: main
 Process: com.example.app, PID: 23581
 java.lang.IllegalArgumentException: Rect should intersect with child's bounds.
     at android.support.design.widget.CoordinatorLayout.offsetChildByInset(CoordinatorLayout.java:1319)
     at android.support.design.widget.CoordinatorLayout.onChildViewsChanged(CoordinatorLayout.java:1257)
     at android.support.design.widget.CoordinatorLayout$OnPreDrawListener.onPreDraw(CoordinatorLayout.java:1805)
     at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:847)
     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1867)
     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996)
     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5600)
     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
     at android.view.Choreographer.doCallbacks(Choreographer.java:574)
     at android.view.Choreographer.doFrame(Choreographer.java:544)
     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
     at android.os.Handler.handleCallback(Handler.java:733)
     at android.os.Handler.dispatchMessage(Handler.java:95)
     at android.os.Looper.loop(Looper.java:136)
     at android.app.ActivityThread.main(ActivityThread.java:5001)
     at java.lang.reflect.Method.invokeNative(Native Method)
     at java.lang.reflect.Method.invoke(Method.java:515)
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
     at dalvik.system.NativeStart.main(Native Method)

这个例外意味着什么,以及如何解决它？这是一个全新的项目,所以我没有做任何改变.

Answer 1

在将新的appcompat版本更新为24.2.1后,我遇到了同样的错误,请尝试将版本降低到24.1.1甚至更低版本.

Answer 2

在我的情况下,问题是由于FloatingActionButton.Behavior引起的.

这里是协调器布局内的代码

  if (behavior != null && behavior.getInsetDodgeRect(this, child, rect)) {
        // Make sure that it intersects the views bounds
        if (!rect.intersect(child.getLeft(), child.getTop(),
                child.getRight(), child.getBottom())) {
            throw new IllegalArgumentException("Rect should intersect with child's bounds.");
        }
    }

这里是FloatingActionButton.Behavior内部的代码

    @Override
    public boolean getInsetDodgeRect(@NonNull CoordinatorLayout parent,
            @NonNull FloatingActionButton child, @NonNull Rect rect) {
        // Since we offset so that any internal shadow padding isn't shown, we need to make
        // sure that the shadow isn't used for any dodge inset calculations
        final Rect shadowPadding = child.mShadowPadding;
        rect.set(child.getLeft() + shadowPadding.left,
                child.getTop() + shadowPadding.top,
                child.getRight() - shadowPadding.right,
                child.getBottom() - shadowPadding.bottom);
        return true;
    }

正如您所看到的,getInsetDodgeRect返回true,并且由于某种原因,rect不相交.这导致了问题.

解决方法.

我可以修复它只是扩展行为并覆盖方法getInsetDodgeRect返回false;

public class ScrollAwareFABBehavior extends FloatingActionButton.Behavior {
...
@Override
public boolean getInsetDodgeRect(@NonNull CoordinatorLayout parent, @NonNull FloatingActionButton child, @NonNull Rect rect) {
    super.getInsetDodgeRect(parent, child, rect);
    return false;
}
...

Answer 3

这是支持库中引入的错误24.2.1,请参见此处.

已知的解决方法:

• 降级到不同的支持库版本