Trait SurfaceHolder_Callback2

pub trait SurfaceHolder_Callback2:
    SurfaceHolder_Callback
    + JObjRef
    + JObjNew
    + PartialEq
    + Debug {
    const CLASS: &'static str = "android/view/SurfaceHolder$Callback2";
    const OBJECT_SIG: &'static str = "Landroid/view/SurfaceHolder$Callback2;";
    const DIM: u8 = 0u8;

    // Required method
    fn surface_redraw_needed<SH: SurfaceHolder>(&self, holder: &SH);
}

客户端可以实现此接口来接收有关表面更改的信息。与 SurfaceView 一起使用时，被保留的 Surface 仅在调用 surfaceCreated(SurfaceHolder) 和 surfaceDestroyed(SurfaceHolder) 之间可用。 回调使用 SurfaceHolder.addCallback 方法设置。

Provided Associated Constants

const CLASS: &'static str = "android/view/SurfaceHolder$Callback2"

android/view/SurfaceHolder$Callback2

const OBJECT_SIG: &'static str = "Landroid/view/SurfaceHolder$Callback2;"

Landroid/view/SurfaceHolder$Callback2;

const DIM: u8 = 0u8

数组维度

Required Methods

fn surface_redraw_needed<SH: SurfaceHolder>(&self, holder: &SH)

当应用程序需要重绘其表面的内容时调用，在调整其大小后或出于其他原因。通过在重绘完成之前不从此处返回，您可以确保用户不会看到处于不良状态的表面（在以新大小正确绘制之前）。 这通常会先调用surfaceChanged。从O开始，可以实现surfaceRedrawNeededAsync以提供非阻塞实现。如果未实现surfaceRedrawNeededAsync，则将改为调用此方法。 holder 其表面已更改的SurfaceHolder。

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors