android glsurfaceview绑定到camera2中
时间: 2023-07-29 07:09:12 浏览: 56
要将GLSurfaceView绑定到Camera2中,您需要使用TextureView而不是GLSurfaceView。这是因为GLSurfaceView不支持与Camera2 API一起使用。
以下是一些步骤,可以帮助您在Android中将TextureView与Camera2 API结合使用:
1. 在布局文件中添加一个TextureView:
```
<TextureView
android:id="@+id/texture_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
2. 在您的活动类中获取TextureView的引用:
```
TextureView textureView = findViewById(R.id.texture_view);
```
3. 创建一个CameraDevice.StateCallback来处理CameraDevice的状态变化:
```
private CameraDevice.StateCallback cameraStateCallback = new CameraDevice.StateCallback() {
@Override
public void onOpened(@NonNull CameraDevice camera) {
// CameraDevice已经打开,可以开始预览
}
@Override
public void onDisconnected(@NonNull CameraDevice camera) {
// CameraDevice已经断开连接
}
@Override
public void onError(@NonNull CameraDevice camera, int error) {
// CameraDevice遇到错误
}
};
```
4. 获取CameraManager的实例,并使用它来打开相机:
```
CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
String cameraId = cameraManager.getCameraIdList()[0]; // 获取第一个后置摄像头
cameraManager.openCamera(cameraId, cameraStateCallback, null);
```
5. 在CameraDevice.StateCallback的onOpened方法中,设置一个SurfaceTextureListener来处理TextureView的缓冲区更新:
```
@Override
public void onOpened(@NonNull CameraDevice camera) {
SurfaceTexture surfaceTexture = textureView.getSurfaceTexture();
surfaceTexture.setDefaultBufferSize(previewSize.getWidth(), previewSize.getHeight());
Surface previewSurface = new Surface(surfaceTexture);
try {
CaptureRequest.Builder previewRequestBuilder = camera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
previewRequestBuilder.addTarget(previewSurface);
camera.createCaptureSession(Arrays.asList(previewSurface), new CameraCaptureSession.StateCallback() {
@Override
public void onConfigured(@NonNull CameraCaptureSession session) {
try {
CaptureRequest previewRequest = previewRequestBuilder.build();
session.setRepeatingRequest(previewRequest, null, null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
@Override
public void onConfigureFailed(@NonNull CameraCaptureSession session) {
// 配置失败
}
}, null);
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
```
6. 在SurfaceTextureListener中,创建一个OpenGL ES上下文,并将其与TextureView关联:
```
textureView.setSurfaceTextureListener(new TextureView.SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
// 创建OpenGL ES上下文
EGL10 egl = (EGL10) EGLContext.getEGL();
EGLDisplay display = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);
egl.eglInitialize(display, null);
int[] attribList = {
EGL10.EGL_RED_SIZE, 8,
EGL10.EGL_GREEN_SIZE, 8,
EGL10.EGL_BLUE_SIZE, 8,
EGL10.EGL_ALPHA_SIZE, 8,
EGL10.EGL_DEPTH_SIZE, 0,
EGL10.EGL_STENCIL_SIZE, 0,
EGL10.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT,
EGL10.EGL_NONE
};
EGLConfig[] configs = new EGLConfig[1];
int[] numConfigs = new int[1];
egl.eglChooseConfig(display, attribList, configs, 1, numConfigs);
int[] contextAttribList = {
EGL14.EGL_CONTEXT_CLIENT_VERSION, 2,
EGL10.EGL_NONE
};
EGLContext context = egl.eglCreateContext(display, configs[0], EGL10.EGL_NO_CONTEXT, contextAttribList);
// 将OpenGL ES上下文与TextureView关联
EGLSurface eglSurface = egl.eglCreateWindowSurface(display, configs[0], surface, null);
egl.eglMakeCurrent(display, eglSurface, eglSurface, context);
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
return false;
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
}
});
```
注意:上述步骤仅提供了一个基本的示例,用于将TextureView与Camera2 API结合使用。在实际应用中,您可能需要根据自己的需求进行修改和定制。