魅族手机打开设置的深色模式com.meizu.nightmode.MzNightModeManager.beforeDrawColor会崩溃，怎么解决？

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.Matrix.set(android.graphics.Matrix)' on a null object reference
at android.graphics.Shader.copyLocalMatrix(Shader.java:159)
at android.graphics.LinearGradient.copy(LinearGradient.java:129)
at android.graphics.ComposeShader.copy(ComposeShader.java:96)
at android.graphics.Shader.mzReversalCopy(Shader.java:134)
at com.meizu.nightmode.MzNightModeManager.beforeDrawColor(MzNightModeManager.java:830)
at com.meizu.nightmode.MzNightModeManager.beforeDrawColor(MzNightModeManager.java:810)
at android.graphics.BaseCanvas.drawRect(BaseCanvas.java:620)
at android.graphics.Canvas.drawRect(Canvas.java:1814)