java Android东西摄像头流媒体（使用opencv）
由于安卓设备的摄像头权限存在问题，当我尝试运行简单的OpenCV应用程序时，会显示这样一条消息：“您的设备似乎不支持摄像头（或已锁定），应用程序将关闭。”。
Android Studio中的Logcat过滤器显示OpenCV库已正确加载，所以我认为问题可能是权限（您可以检查我的AndroidManifest文件）或与OpenCV库的兼容性不好
Logcat还报告此错误：“E/JavaCameraView:Camera#0无法打开：无法连接到摄像头服务”
链接到源代码：https://github.com/mrAlex-dev/CameraPreview-AndroidThings
另外，我用的是：树莓皮3b，树莓皮摄像机v1。3，Android Things-0.4.1-devpreview，OpenCV-3.3.0-Android-sdk
谁能帮帮我吗？我是新手
主要活动的代码。java:
package com.example.alexd.camerapreview安卓things;
import 安卓.app.Activity;
import 安卓.os.Bundle;
import 安卓.util.Log;
import 安卓.view.SurfaceView;
import org.opencv.安卓.BaseLoaderCallback;
import org.opencv.安卓.CameraBridgeViewBase;
import org.opencv.安卓.JavaCameraView;
import org.opencv.安卓.LoaderCallbackInterface;
import org.opencv.安卓.OpenCVLoader;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
public class MainActivity extends Activity implements CameraBridgeViewBase.CvCameraViewListener2 {
private static String TAG = "MainActivity";
JavaCameraView javaCameraView;
Mat mRgba;
BaseLoaderCallback mLoaderCallBack = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch(status){
case BaseLoaderCallback.SUCCESS:{
javaCameraView.enableView();
break;
}
default:{
super.onManagerConnected(status);
break;
}
}
super.onManagerConnected(status);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
javaCameraView = (JavaCameraView)findViewById(R.id.java_camera_view);
javaCameraView.setVisibility(SurfaceView.VISIBLE);
javaCameraView.setCvCameraViewListener(this);
}
@Override
protected void onPause(){
super.onPause();
if(javaCameraView!=null)
javaCameraView.disableView();
}
@Override
protected void onDestroy(){
super.onDestroy();
if(javaCameraView!=null)
javaCameraView.disableView();
}
@Override
protected void onResume(){
super.onResume();
if(OpenCVLoader.initDebug()){
Log.i(TAG, "OpenCV loaded successfully");
mLoaderCallBack.onManagerConnected(LoaderCallbackInterface.SUCCESS);
}
else{
Log.i(TAG, "OpenCV not loaded");
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_3_0, this, mLoaderCallBack);
}
}
@Override
public void onCameraViewStarted(int width, int height) {
mRgba = new Mat(height, width, CvType.CV_8UC4);
}
@Override
public void onCameraViewStopped() {
mRgba.release();
}
@Override
public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
mRgba = inputFrame.rgba();
return mRgba;
}
}
这是AndroidManifest。xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:安卓="http://schemas.安卓.com/apk/res/安卓"
package="com.example.alexd.camerapreview安卓things">
<uses-permission 安卓:name="安卓.permission.CAMERA" />
<uses-feature 安卓:name="安卓.hardware.camera" />
<uses-feature 安卓:name="安卓.hardware.camera.autofocus" />
<uses-feature 安卓:name="安卓.hardware.camera2.*" />
<uses-permission 安卓:name="安卓.permission.WRITE_SETTINGS"/>
<uses-permission 安卓:name="安卓.permission.INTERNET" />
<uses-permission 安卓:name="com.google.安卓.things.permission.MANAGE_INPUT_DRIVERS" />
<application>
<uses-library 安卓:name="com.google.安卓.things" />
<activity 安卓:name=".MainActivity">
<intent-filter>
<action 安卓:name="安卓.intent.action.MAIN" />
<category 安卓:name="安卓.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action 安卓:name="安卓.intent.action.MAIN" />
<category 安卓:name="安卓.intent.category.IOT_LAUNCHER" />
<category 安卓:name="安卓.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
这是Logcat错误：
09-13 08:50:29.812 1880-1880/? E/cutils-trace: Error opening trace file: No such file or directory (2)
09-13 08:50:30.026 1880-1880/? E/memtrack: Couldn't load memtrack module (No such file or directory)
09-13 08:50:30.026 1880-1880/? E/安卓.os.Debug: failed to load memtrack module: -2
09-13 08:50:32.090 1899-1899/? E/cutils-trace: Error opening trace file: No such file or directory (2)
09-13 08:50:32.300 1899-1899/? E/memtrack: Couldn't load memtrack module (No such file or directory)
09-13 08:50:32.300 1899-1899/? E/安卓.os.Debug: failed to load memtrack module: -2
09-13 08:50:35.356 1913-1913/? E/cutils-trace: Error opening trace file: No such file or directory (2)
09-13 08:50:35.573 1911-1911/? E/memtrack: Couldn't load memtrack module (No such file or directory)
09-13 08:50:35.573 1911-1911/? E/安卓.os.Debug: failed to load memtrack module: -2
09-13 08:50:37.811 150-150/? E/libEGL: called unimplemented OpenGL ES API
09-13 08:50:37.811 150-150/? E/SurfaceFlinger: glCheckFramebufferStatusOES error 0
09-13 08:50:37.812 150-150/? E/SurfaceFlinger: got GL_FRAMEBUFFER_COMPLETE_OES error while taking screenshot
09-13 09:00:00.843 412-429/system_process E/BatteryStatsService: no controller energy info supplied
09-13 09:00:00.848 412-429/system_process E/KernelWakelockReader: neither /proc/wakelocks nor /d/wakeup_sources exists
09-13 08:52:02.318 412-478/system_process E/TaskPersister: File error accessing recents directory (directory doesn't exist?).
09-13 08:51:58.902 155-155/? E/Camera2Client: notifyError: Error condition 0 reported by HAL, requestId -1
09-13 08:50:39.321 155-1838/? E/V4L2CameraHAL: virtual int v4l2_camera_hal::V4L2Camera::setupStreams(camera3_stream_configuration_t *):380: V4L2 only supports 1 stream configuration at a time (stream 0 is format 34, width 640, height 480, stream 1 is format 33, width 320, height 240).
09-13 08:50:39.321 155-1838/? E/Camera: int default_camera_hal::Camera::configureStreams(camera3_stream_configuration_t *):0: Failed to setup stream set
09-13 08:50:39.321 155-1838/? E/Camera3-Device: Camera 0: configureStreamsLocked: Set of requested inputs/outputs not supported by HAL
09-13 08:50:39.321 155-1838/? E/Camera3-Device: Camera 0: setUpRequestLocked: Can't set up streams: Invalid argument (-22)
09-13 08:50:39.321 155-1838/? E/Camera3-Device: Camera 0: convertMetadataListToRequestListLocked: Can't create capture request
09-13 08:50:39.321 155-1838/? E/Camera2-StreamingProcessor: startStream: Camera 0: Unable to set preview request to start preview: Invalid argument (-22)
09-13 08:50:39.321 155-1838/? E/Camera2Client: startPreviewL: Camera 0: Unable to start streaming preview: Invalid argument (-22)
09-13 08:50:39.262 162-1964/? E/FileSource: Failed to open file '/system/media/audio/ui/VideoRecord.ogg'. (No such file or directory)
09-13 08:50:39.262 162-1964/? E/GenericSource: Failed to create data source!
09-13 08:50:39.262 155-1838/? E/MediaPlayer: error (1, -2147483648)
09-13 08:50:39.266 162-1966/? E/FileSource: Failed to open file '/system/media/audio/ui/VideoStop.ogg'. (No such file or directory)
09-13 08:50:39.266 162-1966/? E/GenericSource: Failed to create data source!
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