Add a new {@link Size} to this collection. @param size The size to add. @return {@code true} if it is added, {@code false} if it already exists and i

dp转px @param dpVal dp value @return px value

Returns an instance of {@link AspectRatio} specified by {@code x} and {@code y} values. The values {@code x} and {@code} will be reduced by their grea

dp转px @param dpVal dp value @return px value

指示器小圆点半径

Removes the specified aspect ratio and all sizes associated with it. @param ratio The aspect ratio to be removed.

dp转px @param dpVal dp value @return px value

将drawable颜色着色为color @param drawable @param color @return 重绘后的Drawable

Gets the current aspect ratio of camera. @return The current {@link AspectRatio}. Can be {@code null} if no camera is opened yet.

设置矩形的范围 @param rectF 矩形 @param left 左顶点 @param top 上顶点 @param right 右顶点 @param bottom 下顶点

Configures the transform matrix for TextureView based on {@link #mDisplayOrientation} and the surface size.

指示器小圆点间距

旋转主菜单按钮 @param startAngel 起始角度 @param endAngel 结束角度

Sets the aspect ratio of camera. @param ratio The {@link AspectRatio} to be set.

<p>Starts a capture session for camera preview.</p> <p>This rewrites {@link #mPreviewRequestBuilder}.</p> <p>The result will be continuously processed

Updates the internal state of auto-focus to {@link #mAutoFocus}.

Updates the internal state of flash to {@link #mFlash}.

Add a new callback. @param callback The {@link Callback} to add. @see #removeCallback(Callback)

Calculate camera rotation <p> This calculation is applied to the output JPEG either via Exif Orientation tag or by actually transforming the bitmap. (

Calculate display orientation https://developer.android.com/reference/android/hardware/Camera.html#setDisplayOrientation(int) <p> This calculation is

Captures a still picture.

初始化菜单子项按钮 @param context

初始化主按钮 @param context

Test if the supplied orientation is in landscape. @param orientationDegrees Orientation in degrees (0,90,180,270) @return True if in landscape, false

Called when it is ready to take a still picture.

Parse an {@link AspectRatio} from a {@link String} formatted like "4:3". @param s The string representation of the aspect ratio @return The aspect ra

Enables or disables the continuous auto-focus mode. When the current camera doesn't support auto-focus, calling this method will be ignored. @param a

@return {@code true} if {@link #mCameraParameters} was modified.

Chooses camera by the direction it faces. @param facing The camera facing. Must be either {@link #FACING_BACK} or {@link #FACING_FRONT}

Sets the flash mode. @param flash The desired flash mode.

@return {@code true} if {@link #mCameraParameters} was modified.