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(android): Android tap-to-focus and improved (continuous) auto-focus (#575)

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* Android tap-to-focus and improved (continuous) auto-focus

Tap-to-focus

- On tap, compute focus area around motion event's location, and pass this to the camera parameters
  as the new focus area.
- Adds RCTCameraUtils.java file, so far with only a single function that helps compute the focus area
  from a motion event. This file can serve as a location for utility constants and functions for the
  rest of the app, where such things can be extracted out.

Improved (continuous) auto-focus

- Use FOCUS_MODE_CONTINUOUS_PICTURE/VIDEO when possible to enable continuous auto-focus; fall back to
  FOCUS_MODE_AUTO otherwise, if able.

Other changes

- Update README to specify differences between iOS and Android for focus and zoom functionality.
- Update AndroidManifest with more thorough list of permissions and features.
- Update Example package.json react and react-native dependencies to match root package's package.json.

* Example: default empty onFocusChanged callback

- Enables default tap-to-focus behavior in Example app, facilitating
  testing of focus features in the Example app
This commit is contained in:
Abe Botros
2017-04-24 09:25:49 -07:00
committed by Zack Story
parent 20b0721850
commit ae9eab3533
5 changed files with 181 additions and 30 deletions
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Example/android/app/src/main/AndroidManifest.xml
+9
View File
@@ -10,6 +10,15 @@
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.RECORD_VIDEO"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-feature android:name="android.hardware.camera.autofocus" android:required="false" />
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="22" />