blocks|key|1071158|text|在API+Level+5(我相信映射到Android2.0)中添加了许多Camera.Parameters类的方法，它们将返回支持的特性列表。对从camera.getParameters()检索到的Camera.Parameters对象调用getSupportedFocusModes|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1071159|http://developer.android.com/reference/android/hardware/Camera.Parameters.html|offset|length|1071160|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|26|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

There are a number of methods of the Camera.Parameters class added in API Level 5 (I believe that maps to Android 2.0) that will return a list of supported features. Call getSupportedFocusModes on the Camera.Parameters object retrieved from camera.getParameters()

<a href="http://developer.android.com/reference/android/hardware/Camera.Parameters.html" rel="nofollow">http://developer.android.com/reference/android/hardware/Camera.Parameters.html</a>

blocks|key|1071177|text|List<String>+supportedFocusModes+=+camera.getParameters().getSupportedFocusModes();
boolean+hasAutoFocus+=+supportedFocusModes+!=+null+&&+supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1071178|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>List&lt;String&gt; supportedFocusModes = camera.getParameters().getSupportedFocusModes();
boolean hasAutoFocus = supportedFocusModes != null &amp;&amp; supportedFocusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)
</code></pre>

blocks|key|1071180|text|+++private+void+getSuppourtedFocusedModes(Camera+camera)+
+++{
++++++++final+Camera.Parameters+parameters+=+camera.getParameters();
++++++++List<String>+supportedFocusModes+=+parameters.getSupportedFocusModes();
++++++++LogUtils.infoMsg("supportedFocusModes+"+%2B+supportedFocusModes);
++++++++for+(String+mode+:+supportedFocusModes)+{
++++++++++++LogUtils.infoMsg("supportedFocusModes+"+%2B+mode);
++++++++}
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1071181|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> private void getSuppourtedFocusedModes(Camera camera) 
 {
 final Camera.Parameters parameters = camera.getParameters();
 List&lt;String&gt; supportedFocusModes = parameters.getSupportedFocusModes();
 LogUtils.infoMsg("supportedFocusModes " + supportedFocusModes);
 for (String mode : supportedFocusModes) {
 LogUtils.infoMsg("supportedFocusModes " + mode);
 }
 }
</code></pre>

blocks|key|1071193|text|CameraManager+cameraManager+=+(android.hardware.camera2.CameraManager)+getSystemService(CAMERA_SERVICE);

int[]+afModes+=+cameraManager.getCameraCharacteristics("0").get(CameraCharacteristics.CONTROL_AF_AVAILABLE_MODES);

if+(afModes.length+<=+1)
{Log.d(TAG,+"Camera+doesn't+have+autofocus");}
else
{Log.d(TAG,+"Camera+has+autofocus");}

++++++++Log.d(TAG,+"CONTROL_AF_AVAILABLE_MODES:");
++++++++for+(int+position+:+afModes)+{
++++++++++++switch+(afModes[position])+{
++++++++++++++++case+0:
++++++++++++++++++++Log.d(TAG,+"CONTROL_AF_MODE_OFF+(0)");
++++++++++++++++++++break;
++++++++++++++++case+1:
++++++++++++++++++++Log.d(TAG,+"CONTROL_AF_MODE_AUTO+(1)");
++++++++++++++++++++break;
++++++++++++++++case+2:
++++++++++++++++++++Log.d(TAG,+"CONTROL_AF_MODE_MACRO+(2)");
++++++++++++++++++++break;
++++++++++++++++case+3:
++++++++++++++++++++Log.d(TAG,+"CONTROL_AF_MODE_CONTINUOUS_VIDEO+(3)");
++++++++++++++++++++break;
++++++++++++++++case+4:
++++++++++++++++++++Log.d(TAG,+"CONTROL_AF_MODE_CONTINUOUS_PICTURE+(4)");
++++++++++++++++++++break;
++++++++++++++++case+5:
++++++++++++++++++++Log.d(TAG,+"CONTROL_AF_MODE_EDOF+(5)");
++++++++++++++++++++break;
++++++++++++++++default:
++++++++++++++++++++Log.d(TAG,+String.valueOf(afModes[position]));
++++++++++++}
++++++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1071194|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>CameraManager cameraManager = (android.hardware.camera2.CameraManager) getSystemService(CAMERA_SERVICE);

int[] afModes = cameraManager.getCameraCharacteristics("0").get(CameraCharacteristics.CONTROL_AF_AVAILABLE_MODES);

if (afModes.length &lt;= 1)
{Log.d(TAG, "Camera doesn't have autofocus");}
else
{Log.d(TAG, "Camera has autofocus");}

 Log.d(TAG, "CONTROL_AF_AVAILABLE_MODES:");
 for (int position : afModes) {
 switch (afModes[position]) {
 case 0:
 Log.d(TAG, "CONTROL_AF_MODE_OFF (0)");
 break;
 case 1:
 Log.d(TAG, "CONTROL_AF_MODE_AUTO (1)");
 break;
 case 2:
 Log.d(TAG, "CONTROL_AF_MODE_MACRO (2)");
 break;
 case 3:
 Log.d(TAG, "CONTROL_AF_MODE_CONTINUOUS_VIDEO (3)");
 break;
 case 4:
 Log.d(TAG, "CONTROL_AF_MODE_CONTINUOUS_PICTURE (4)");
 break;
 case 5:
 Log.d(TAG, "CONTROL_AF_MODE_EDOF (5)");
 break;
 default:
 Log.d(TAG, String.valueOf(afModes[position]));
 }
 }
</code></pre>

For the Android API version 2.1 and higher, we can use context:

<pre><code>getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_AUTOFOCUS)
</code></pre>

But before version 2.1, how can we perform the same operation? Is there anything like this that does not involve invoking <code>Camera.open</code> and then <code>getParameters</code>?

Android: Check whether camera supports auto-focus?

Android

对于Android API版本2.1和更高版本，我们可以使用context：getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_AUTOFOCUS)但是在2.1版本之前，我们如何执行同样的操作呢？有没有类似这样的东西不需要先调用Camer...

问Android:检查摄像头是否支持自动对焦？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问Android:检查摄像头是否支持自动对焦？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问Android:检查摄像头是否支持自动对焦？
EN