blocks|key|143487|text|要支持您想要的api，请使用以下代码。只需确定与api级别对应的适当名称即可。例如，API21是棒棒糖，API15是ICE_CREAM_SANDWICH_MR1。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|143488|+if+((Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1)++
++++++++++++++++++++++++++++++++++++&&+((Build.VERSION.SDK_INT+<+Build.VERSION_CODES.LOLLIPOP)))+{
+++++++++++//+your+code+here+-+is+between+15-21

+}+else+if(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.LOLLIPOP)+{
+++++++++++//+your+code+here+-+is+api+21
+}|code-block|syntax|javascript|143489|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

To support api you want, use the code below. Just determine the appropriate names corresponded api levels. For example, API 21 is LOLLIPOP, and API 15 is ICE_CREAM_SANDWICH_MR1.

<pre><code> if ((Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) 
 &amp;&amp; ((Build.VERSION.SDK_INT &lt; Build.VERSION_CODES.LOLLIPOP))) {
 // your code here - is between 15-21

 } else if(Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.LOLLIPOP) {
 // your code here - is api 21
 }
</code></pre>

blocks|key|2719397|text|即使旧的相机API被标记为弃用，它仍然是完全有效的，并将在相当长的一段时间内保持这种状态(因为目前Play+Store上几乎所有使用相机的应用程序都在使用它)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2719398|你必须忽略Android+Studio关于它被弃用的抱怨，但如果你想支持早于21世纪的Android版本，你必须使用旧的API。|2719399|在API+level+21上，你当然可以使用新的API及其新功能，但目前如果你在API之间切换，你必须在你的应用程序中维护一个完全独立的流程。不幸的是，这两个API在世界观上有很大的不同，以至于很难编写一个支持库，让你在旧设备上也能使用类似新API的东西(如果不是在API+21%2B上，这个库就会从新API映射到旧API)。|2719400|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Even though the old camera API is marked as deprecated, it is still fully functional, and will remain so for quite a while (as nearly all camera-using applications on the Play Store use it currently).

You'll have to ignore Android Studio's complaints about it being deprecated, but if you want to support Android versions earlier than 21, you have to use the old API. 

On API level 21, you can certainly use the new API and its new features, but currently you'll have to maintain a wholly separate flow in your app if you switch between the APIs. Unfortunately, the two APIs have a different enough of a worldview that it's hard to write a support library that would let you use something like the new API on older devices as well (where the library maps from the new API to the old API if not on API 21+).

blocks|key|143511|text|将您需要的来自camera的所有方法放在一个接口中，然后创建一个camera实例，如下所示|type|unstyled|depth|inlineStyleRanges|entityRanges|data|143512|++++if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.LOLLIPOP)+{
++++++++Log.d(TAG,+"camera2+selected");
++++++++this.camera+=+new+Camera2(getContext());
++++}+else+{
++++++++Log.d(TAG,+"camera1+selected");
++++++++this.camera+=+new+Camera1(getContext());
++++}|code-block|syntax|javascript|143513|这样你就可以把所有的东西分开，这会让你的生活变得更容易。|143514|建议一句--与camera2的生活并不是那么美好。供应商仍然做垃圾实现，因此您将不得不添加许多条件和变通方法。|143515|示例1-+S6报告它不支持闪存:)示例2-+LG设备报告了支持的图像大小列表-但并不是所有的图像大小实际上都受支持！|143516|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Put all the methods from the camera that you need in an interface and then create a camera instance like this

<pre><code> if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.LOLLIPOP) {
 Log.d(TAG, "camera2 selected");
 this.camera = new Camera2(getContext());
 } else {
 Log.d(TAG, "camera1 selected");
 this.camera = new Camera1(getContext());
 }
</code></pre>

This way you will have everything split up and it will make your life so much easier.

Word of advice - life with camera2 isn't that great. Venders still make crap implementations and you will thus have to add lots of conditions and workarounds.

Example 1 - S6 reports that it doesn't support flash :)
Example 2 - An LG device reports back a list of supported image sizes - however not all of them are actually supported!!

blocks|key|2719416|text|我发现最好的选择是创建两个活动。使用常规方法检查当前设备API|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2719417|Intent+i;
if+(Build.VERSION.SDK_INT+>=+Build.VERSION_CODES.LOLLIPOP)+{
++++i+=+new+Intent(context,camera2.class)
}+else+{
++++i+=+new+Intent(context,camera.class);
}
startActivity(i);|code-block|syntax|javascript|2719418|这样，当我回顾代码时，我就不会有太多的困惑。代码很容易修改，因为它是分离的。|2719419|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I found out the best option is to create two activity. Use the general way to check for the current device API

<pre><code>Intent i;
if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.LOLLIPOP) {
 i = new Intent(context,camera2.class)
} else {
 i = new Intent(context,camera.class);
}
startActivity(i);
</code></pre>

This way I don't have to having alot of confusion when look back the code. The code is easy to modify since it seperated.

blocks|key|2932070|text|使用支持注释|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2932071|++++@TargetApi(21)|code-block|syntax|javascript|2932072|避免检查|2932073|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Use the support annotation 

<pre><code> @TargetApi(21)
</code></pre>

to avoid checking

blocks|key|144571|text|虽然，谷歌推荐使用Camera2+Api+>=+21，但手动设置可能会有问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|144572|当你需要使用自动设置模式实现拍照的应用程序时，它会工作得很好。但!如果需要创建手动设置模式实现的app，对于有>=+21接口的设备，首先需要检查支持的硬件级别：|144573|选择摄像头(正面、正面)，获取其特性并检查硬件级别。|144574|mCameraCharacteristics+=+mCameraManager.getCameraCharacteristics(mCameraId)

val+level+=+mCameraCharacteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL)|code-block|syntax|javascript|144575|CameraCharacteristics表示下一个支持的级别:+LIMITED、FULL、LEGACY、LEVEL_3、EXTERNAL。|144576|在较高级别上，这些级别是：|144577|对于老款设备，传统的设备以向后兼容的模式运行，功能非常有限。|offset|length|style|BOLD|144578|有限的设备代表基准功能集，还可能包括作为完整功能子集的附加功能。|144579|此外，FULL设备还支持每帧手动控制传感器、闪光灯、镜头和后处理设置，以及以高速率捕获图像。|144580|LEVEL_3设备还支持YUV再处理和原始图像捕获，以及其他输出流配置。|144581|如果你有传统的支持级别，你应该使用旧的摄像头Api。|144582|entityMap^0|0|0|0|0|0|0|4|6|0|0|3|0|3|4|0|0|7|0|4|3|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|16|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|17|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|18|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|19|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1A|8|@$Q|1B|R|1C|S|T]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1D|8|@$Q|1E|R|1F|S|T]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1G|8|@$Q|1H|R|1I|S|T]]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1J|8|@$Q|1K|R|1L|S|T]]|9|@]|A|$]]|$1|10|3|11|5|6|7|1M|8|@$Q|1N|R|1O|S|T]]|9|@]|A|$]]|$1|12|3|-4|5|6|7|1P|8|@]|9|@]|A|$]]]|13|$]]

Although, what Google recommend use Camera2 Api >= 21, but you could have problem with manual settings.

When you need implement app for taking photo with Auto Setting Mode, it'll work fine. 
But! If need create app with Manual Setting Mode implementation, for devices that have API >= 21, firstly, need check supported HARDWARE LEVEL:

Select camera(Front, Face), get it characteristics and check HARDWARE LEVEL.

<pre><code>mCameraCharacteristics = mCameraManager.getCameraCharacteristics(mCameraId)

val level = mCameraCharacteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL)
</code></pre>

CameraCharacteristics represent next supported levels:
LIMITED, FULL, LEGACY, LEVEL_3, EXTERNAL.

At a high level, the levels are:

LEGACY devices operate in a backwards-compatibility mode for older Android devices, and have very limited capabilities.

LIMITED devices represent the baseline feature set, and may also include additional capabilities that are subsets of FULL.

FULL devices additionally support per-frame manual control of sensor, flash, lens and post-processing settings, and image capture at a high rate.

LEVEL_3 devices additionally support YUV reprocessing and RAW image capture, along with additional output stream configurations.

If you got the LEGACY supprot level, you should use old Camera Api.

blocks|key|144590|text|请阅读链接Camera+Version+Support他们声明....|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|144591|Camera+API1|style|BOLD|144592|Android5.0废弃了Camera+API1，随着新平台开发的重点放在Camera+API2上，它将继续被淘汰。然而，逐步淘汰的时间将会很长，安卓版本将在一段时间内继续支持相机API1应用程序。具体地说，将继续支持：|144593|​|144594|应用程序的|144595|Camera+API1界面。基于Camera+API1构建的相机应用程序应该可以像在运行早期安卓版本的设备上一样工作。|unordered-list-item|144596|Camera+HAL版本。包括对相机HAL1.0的支持。|144597|144598|144599|entityMap|0|LINK|mutability|MUTABLE|url|https://source.android.com/devices/camera/versioning^0|5|M|0|0|0|B|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|6|7|16|8|@$A|17|B|18|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|19|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|1A|8|@]|9|@]|C|$]]|$1|L|3|M|5|6|7|1B|8|@]|9|@]|C|$]]|$1|N|3|O|5|P|7|1C|8|@]|9|@]|C|$]]|$1|Q|3|R|5|P|7|1D|8|@]|9|@]|C|$]]|$1|S|3|-4|5|6|7|1E|8|@]|9|@]|C|$]]|$1|T|3|K|5|6|7|1F|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|1G|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]]]

Plz read link <a href="https://source.android.com/devices/camera/versioning" rel="nofollow noreferrer">Camera Version Support</a>
They state that.... 
Camera API1 
Android 5.0 deprecated Camera API1, which continues to be phased out as new platform development focuses on Camera API2. However, the phase-out period will be lengthy, and Android releases will continue to support Camera API1 apps for some time. Specifically, support continues for:

<li>Camera API1 interfaces for apps. Camera apps built on top of Camera API1 should work as they do on devices running earlier Android release versions.
</li>
<li>
Camera HAL versions. Includes support for Camera HAL1.0.
</li>

The new camera2 API confuses me. I want to develop an app (for Android APIs 10 - 21) which uses the device's camera. As stated <a href="https://developer.android.com/reference/android/hardware/camera2/package-summary.html" rel="noreferrer">here</a>, I should use the "Camera" API. 

However, when I try to add the "Camera" API (android.hardware.Camera) to the manifest's user features, <a href="http://developer.android.com/training/camera/photobasics.html" rel="noreferrer">it is marked as deprecated</a>. On the other hand, I cannot change it to the "camera2" API (android.hardware.camera2) since it is only compatible with Android API 21+ (Android 5 - Lollipop) - Would have linked it too, but I can only add 2 links.

Not only do I want my app to run on older versions of Android, but also the newest one...

How to use Android's camera or camera2 API to support old and new API versions without deprecation notes?

Android Studio

Android

新的camera2应用程序接口把我搞糊涂了。我想开发一个应用程序(为安卓API10- 21)，使用设备的摄像头。正如所说的，我应该使用"Camera“接口。但是，当我尝试向清单的用户特性添加"Camera“接口(android.hardware.Camera)时。另一方面，我不能将它更改为"camera2“接口(and...

问如何使用安卓的camera或者API接口来支持新旧的camera2版本而不使用弃用说明？
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问如何使用安卓的camera或者API接口来支持新旧的camera2版本而不使用弃用说明？
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