Question

我正在使用此处的解决方案为我的应用程序制作渐变背景启动画面： how to get android gradient center light effect?

我正在使用Vadym发布的解决方案：

<item >
   <shape xmlns:android="http://schemas.android.com/apk/res/android"
   android:shape="rectangle">
    <gradient
        android:startColor="@android:color/transparent"
        android:endColor="@android:color/black"
        android:centerX="50%"
        android:centerY="50%"
        android:gradientRadius="100%"
        android:type="radial"/>
    </shape>
</item>

不幸的是，这导致整个手机仅在Android 5.0上重启启动！不是5.1或4.4或6.0或7.0 那里发生了什么？我甚至不能评论Vadyms解决方案，因为我仍然没有足够的声誉。有人可以在评论中添加警告吗？

Logcat说：

08-10 09:50:57.395 22267-22292/system_process E/AndroidRuntime: *** FATAL EXCEPTION IN SYSTEM PROCESS: android.display
                                                            java.lang.IllegalArgumentException: radius must be > 0
                                                                at android.graphics.RadialGradient.<init>(RadialGradient.java:57)
                                                                at android.graphics.drawable.GradientDrawable.ensureValidRect(GradientDrawable.java:938)
                                                                at android.graphics.drawable.GradientDrawable.draw(GradientDrawable.java:509)
                                                                at android.graphics.drawable.LayerDrawable.draw(LayerDrawable.java:537)
                                                                at android.view.View.drawBackground(View.java:15352)
                                                                at android.view.View.draw(View.java:15105)
                                                                at android.widget.FrameLayout.draw(FrameLayout.java:592)
                                                                at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2606)
                                                                at android.view.ViewRootImpl.drawSoftware(ViewRootImpl.java:2613)
                                                                at android.view.ViewRootImpl.draw(ViewRootImpl.java:2526)
                                                                at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2337)
                                                                at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1968)
                                                                at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054)
                                                                at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5786)
                                                                at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
                                                                at android.view.Choreographer.doCallbacks(Choreographer.java:580)
                                                                at android.view.Choreographer.doFrame(Choreographer.java:550)
                                                                at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
                                                                at android.os.Handler.handleCallback(Handler.java:739)
                                                                at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                at android.os.Looper.loop(Looper.java:135)
                                                                at android.os.HandlerThread.run(HandlerThread.java:61)
                                                                at com.android.server.ServiceThread.run(ServiceThread.java:46)

Answer 1

On API＆lt; 21 gradientRadius不接受％值。要解决此问题，您可以使用%p（https://developer.android.com/reference/android/graphics/drawable/GradientDrawable.html#attr_android:gradientRadius）

android:gradientRadius="100%p"

Answer 2

试试这个;

System.runFinalization();
Runtime.getRuntime().gc();
System.gc();

为什么Android渐变启动画面仅在5.0上导致即时重启？

2 个答案: