adjustparam看这里!App中CameraView

首先，让我们看一下cameraview的源代码

/*

*版权所有(c)2016 the Android open source project

*

* licensed under the Apache license，version 2.0(the ' license ')；

* you may not use this file except in compliance with the license。

* you may obtain a copy of the license at

*

*

*

* unless required by applicable law or agreed to in writing，软件

* distributed under the license is distributed on an ' as is ' basis，

* without warranties or conditions of any kind，either express or implied .

* see the license for the specific language governing permissions and

* limitations under the License。

*/

package com . Google . Android . camera view；

Import android.a

Import android.con

Import android.con

import Android . OS . build；

import Android . OS . parcel；

import Android . OS . parcelable；

Import Android。

Import Android。

Import Android。

Import Android。

Import android。CreatorCallbacks

Import Android。

Import android.u

importandroid . widget . frame layout；

import Java . lang . anno；

import Java . lang . annopolicy；

Import java.u

Import java.u

public class camera view extends frame layout {

/* * the camera device faces the opposite direction as the device ' s screen。*/

public static final int facing _ back=con；

/* * the camera device faces the same direction as the device ' s screen。*/

public static final int facing _ front=con；

/* * direction the camera faces relative to device screen。*/

@ intdef ({facing _ back，facing _ front})

@Retention)

Public @interface Facing {

}

/** Flash will not be fired。*//

public static final int flash _ off=con；

/* * flash will always be fired during snapshot。*/

public static final int flash _ on=con；

/* * constant emission of light during preview，自动复制和快照。*/

public static final int flash _ torch=con；

/* * flash will be fired automatically when required。*/

public static final int flash _ auto=con；

/* * flash will be fired in red-eye reduction mode。*/

public static final int flash _ red _ eye=con；

/* * the mode for the camera device ' s flash control */

@IntDef({FLASH_OFF，FLASH_ON，