Building with up to date Android SDK and NDK

[jumpy88]

Hello everyone, I'm trying to build UVCCamera to use it in a modern Android environment. I cloned Komakai's fork and checked out to komakai-fixes branch. Then I created a local.properties file with SDK and NDK paths

sdk.dir=/home//bin/android-sdk/SDK/ ndk.dir=/home//bin/android-sdk/SDK/ndk/21.3.6528147/

and set JAVA_HOME=/home/<user>/bin/Java8/jdk1.8.0_271/. When I run gradle build it fails reporting

Ran lint on variant release: 13 issues found Ran lint on variant debug: 13 issues found Wrote HTML report to file:///home//bin/UVCCamera/UVCCamera_komakai/libuvccamera/build/reports/lint-results.html Wrote XML report to file:///home//bin/UVCCamera/UVCCamera_komakai/libuvccamera/build/reports/lint-results.xml :libuvccamera:lint FAILED FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':libuvccamera:lint'. > Lint found errors in the project; aborting build. Fix the issues identified by lint, or add the following to your build script to proceed with errors: ... android { lintOptions { abortOnError false } } ... The first 3 errors (out of 5) were: /home//bin/UVCCamera/UVCCamera_komakai/libuvccamera/src/main/java/com/serenegiant/usb/USBMonitor.java:891: Error: Call requires API level 21 (current min is 14): android.hardware.usb.UsbDevice#getManufacturerName [NewApi] info.manufacturer = device.getManufacturerName();

/home/<user>/bin/UVCCamera/UVCCamera_komakai/libuvccamera/src/main/java/com/serenegiant/usb/USBMonitor.java:892: Error: Call requires API level 21 (current min is 14): android.hardware.usb.UsbDevice#getProductName [NewApi]
info.product = device.getProductName();

/home//bin/UVCCamera/UVCCamera_komakai/libuvccamera/src/main/java/com/serenegiant/usb/USBMonitor.java:893: Error: Call requires API level 21 (current min is 14): android.hardware.usb.UsbDevice#getSerialNumber [NewApi] info.serial = device.getSerialNumber();

There is also a warning while building

Android NDK: WARNING: APP_PLATFORM android-16 is higher than android:minSdkVersion 14 in ./AndroidManifest.xml. NDK binaries will not be compatible with devices older than android-16. See https://android.googlesource.com/platform/ndk/+/master/docs/user/common_problems.md for more information.

I tried to modify minSdkVersion value but other errors rose, so I decided to rollback. Any suggestion how to get rid of this?

[komakai]

@jumpy88 please check out 5f792118e6413f2c7f5c0547844844fb4806cb08 That branch builds successfully with the latest Android Studio

[jumpy88]

It's the commit where I'm. Maybe I'm configuring something the wrong way. Perhaps ndk.dir=/home//bin/android-sdk/SDK/ndk/21.3.6528147/ is too new/old. Which API level are you using?

[komakai]

@jumpy88 I don't think the problem is with the NDK version - please try building with Android Studio and see if that helps. Note that the errors you are seeing are from the linter so they probably OK to ignore

[jumpy88]

You are right, Android Studio builds it (I don't understand why gradle build doesn't but at moment this doesn't matter). I tried to install all of the examples: usbCameraTest0 - 8 immediately crash at startup, usbCameraTest (with no number) starts and seems to work, but not for all of my USB cameras. A 640x480 camera works fine (is recognized and show pictures) but the 2560x960, I need to work with, doesn't. I couldn't find any useful error in logcat, but I suspect the sample code doesn't support the strange or too high resolution. Any suggestion is welcome.

[jumpy88]

Maybe I found something but I don't what to do: E/OculusCameraDriver: mm_stream_get_v4l2_fmt: Unknown fmt=112

[jumpy88]

Perhaps I've also found why the others don't start:

2020-12-16 02:59:18.419 15178-15178/com.serenegiant.usbcameratest2 E/AndroidRuntime: FATAL EXCEPTION: main Process: com.serenegiant.usbcameratest2, PID: 15178 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.serenegiant.usbcameratest2/com.serenegiant.usbcameratest2.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2680) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2741) at android.app.ActivityThread.-wrap12(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1478) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6165) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity. at android.support.v7.app.AppCompatDelegateImplV9.createSubDecor(AppCompatDelegateImplV9.java:354) at android.support.v7.app.AppCompatDelegateImplV9.ensureSubDecor(AppCompatDelegateImplV9.java:323) at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284) at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139) at com.serenegiant.usbcameratest2.MainActivity.onCreate(MainActivity.java:85) at android.app.Activity.performCreate(Activity.java:6724) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2633) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2741)  at android.app.ActivityThread.-wrap12(ActivityThread.java)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1478)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:154)  at android.app.ActivityThread.main(ActivityThread.java:6165)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 

[komakai]

Maybe I found something but I don't what to do: E/OculusCameraDriver: mm_stream_get_v4l2_fmt: Unknown fmt=112

there is no file with the name mm_stream_get_v4l2_fmt in this project so that message comes from somewhere else

[komakai]

Perhaps I've also found why the others don't start:

Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.

OK - so copy the relevant changes from usbcameratest1 - should be easy enough

[jumpy88]

OK - so copy the relevant changes from usbcameratest1 - should be easy enough

Ok, this fixed almost all of them; usbCameraTest2 also required to remove android:background="#ff000000" in activity_main.xml > com.serenegiant.widget.SimpleUVCCameraTextureView (line 39) because background seems not to be supported by TextureView. Some samples still don't show any image and sometimes randomly crash but I don't want to debug all of them. I prefer to move on and try to understand why no one works with my other USB camera. I go to investigate about aspect ratio that I think could be the problem. @komakai do you know if there is any constraint about it in UVCCamera?

[jumpy88]

Fixed it: it was sufficient to modify DEFAULT_PREVIEW_WIDTH and DEFAULT_PREVIEW_HEIGHT in libuvccamera/src/main/java/com/serenegiant/usb/UVCCamera.java