Java 如何从曲面视图中获取位图
我正在尝试从曲面视图获取位图。我已经在这个论坛上看到了很多答案,而且大多数论坛上都有。我正在使用一个自定义的ViewGroup类,其中我使用曲面视图预览相机图像和图形覆盖 这是我的CameraSourcePreview.classJava 如何从曲面视图中获取位图,java,android,android-camera,surfaceview,android-camera2,Java,Android,Android Camera,Surfaceview,Android Camera2,我正在尝试从曲面视图获取位图。我已经在这个论坛上看到了很多答案,而且大多数论坛上都有。我正在使用一个自定义的ViewGroup类,其中我使用曲面视图预览相机图像和图形覆盖 这是我的CameraSourcePreview.class import android.content.Context; import android.content.res.Configuration; import android.graphics.SurfaceTexture; import android.supp
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.SurfaceTexture;
import android.support.v7.util.AsyncListUtil;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.TextureView;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.common.images.Size;
import com.google.android.gms.vision.CameraSource;
import java.io.IOException;
public class CameraSourcePreview extends ViewGroup {
private static final String TAG = "CameraSourcePreview";
private Context mContext;
private SurfaceView mSurfaceView;
private boolean mStartRequested;
private boolean mSurfaceAvailable;
private CameraSource mCameraSource;
private GraphicOverlay mOverlay;
public CameraSourcePreview(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
mStartRequested = false;
mSurfaceAvailable = false;
mSurfaceView = new SurfaceView(context);
mSurfaceView.getHolder().addCallback(new SurfaceCallback());
addView(mSurfaceView);
}
public void start(CameraSource cameraSource) throws IOException {
if (cameraSource == null) {
stop();
}
mCameraSource = cameraSource;
if (mCameraSource != null) {
mStartRequested = true;
startIfReady();
}
}
public void start(CameraSource cameraSource, GraphicOverlay overlay) throws IOException {
mOverlay = overlay;
start(cameraSource);
}
public void stop() {
if (mCameraSource != null) {
mCameraSource.stop();
}
}
public void release() {
if (mCameraSource != null) {
mCameraSource.release();
mCameraSource = null;
}
}
private void startIfReady() throws IOException {
if (mStartRequested && mSurfaceAvailable) {
mCameraSource.start(mSurfaceView.getHolder());
if (mOverlay != null) {
Size size = mCameraSource.getPreviewSize();
int min = Math.min(size.getWidth(), size.getHeight());
int max = Math.max(size.getWidth(), size.getHeight());
if (isPortraitMode()) {
// Swap width and height sizes when in portrait, since it will be rotated by
// 90 degrees
mOverlay.setCameraInfo(min, max, mCameraSource.getCameraFacing());
} else {
mOverlay.setCameraInfo(max, min, mCameraSource.getCameraFacing());
}
mOverlay.clear();
}
mStartRequested = false;
}
}
private class SurfaceCallback implements SurfaceHolder.Callback {
@Override
public void surfaceCreated(SurfaceHolder surface) {
mSurfaceAvailable = true;
try {
startIfReady();
} catch (IOException e) {
Log.e(TAG, "Could not start camera source.", e);
}
}
@Override
public void surfaceDestroyed(SurfaceHolder surface) {
mSurfaceAvailable = false;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
int width = 320;
int height = 240;
if (mCameraSource != null) {
Size size = mCameraSource.getPreviewSize();
if (size != null) {
width = size.getWidth();
height = size.getHeight();
}
}
// Swap width and height sizes when in portrait, since it will be rotated 90 degrees
if (isPortraitMode()) {
int tmp = width;
width = height;
height = tmp;
}
final int layoutWidth = right - left;
final int layoutHeight = bottom - top;
// Computes height and width for potentially doing fit width.
int childWidth = layoutWidth;
int childHeight = layoutHeight;
//(int)(((float) layoutWidth / (float) width) * height);
/*
// If height is too tall using fit width, does fit height instead.
if (childHeight > layoutHeight) {
childHeight = layoutHeight;
childWidth = (int)(((float) layoutHeight / (float) height) * width);
}*/
for (int i = 0; i < getChildCount(); ++i) {
getChildAt(i).layout(0, 0, childWidth, childHeight);
}
try {
startIfReady();
} catch (IOException e) {
Log.e(TAG, "Could not start camera source.", e);
}
}
private boolean isPortraitMode() {
int orientation = mContext.getResources().getConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
return false;
}
if (orientation == Configuration.ORIENTATION_PORTRAIT) {
return true;
}
Log.d(TAG, "isPortraitMode returning false by default");
return false;
}
}
导入android.content.Context;
导入android.content.res.Configuration;
导入android.graphics.SurfaceTexture;
导入android.support.v7.util.AsyncListUtil;
导入android.util.AttributeSet;
导入android.util.Log;
导入android.view.SurfaceHolder;
导入android.view.SurfaceView;
导入android.view.TextureView;
导入android.view.view;
导入android.view.ViewGroup;
导入com.google.android.gms.common.images.Size;
导入com.google.android.gms.vision.CameraSource;
导入java.io.IOException;
公共类CameraSourceReview扩展了视图组{
私有静态最终字符串TAG=“CameraSourcePreview”;
私有上下文;
私人SurfaceView mSurfaceView;
请求私有布尔值;
私有布尔mSurfaceAvailable;
私人摄像源mCameraSource;
专用移动台;
公共CameraSourceReview(上下文、属性集属性){
超级(上下文,attrs);
mContext=上下文;
mstart=false;
mSurfaceAvailable=false;
mSurfaceView=新的SurfaceView(上下文);
mSurfaceView.getHolder().addCallback(新的SurfaceCallback());
addView(mSurfaceView);
}
公共无效开始(CameraSource CameraSource)引发IOException{
如果(cameraSource==null){
停止();
}
mCameraSource=cameraSource;
if(mCameraSource!=null){
mStartRequested=true;
startIfReady();
}
}
公共void start(CameraSource CameraSource、GraphicOverlay覆盖)引发IOException{
mOverlay=叠加;
启动(摄像机源);
}
公共停车场(){
if(mCameraSource!=null){
mCameraSource.stop();
}
}
公开无效释放(){
if(mCameraSource!=null){
mCameraSource.release();
mCameraSource=null;
}
}
私有void startIfReady()引发IOException{
如果(mStartRequested&&mSurfaceAvailable){
mCameraSource.start(mSurfaceView.getHolder());
if(mOverlay!=null){
Size Size=mCameraSource.getPreviewSize();
int min=Math.min(size.getWidth(),size.getHeight());
int max=Math.max(size.getWidth(),size.getHeight());
if(isPortraitMode()){
//在纵向时交换宽度和高度大小,因为它将按
//90度
setcamerRainfo(最小、最大、mCameraSource.getcamerafcing());
}否则{
mOverlay.setcamerRainfo(max、min、mCameraSource.getcamerafcing());
}
mOverlay.clear();
}
mstart=false;
}
}
私有类SurfaceCallback实现SurfaceHolder.Callback{
@凌驾
已创建的公共空隙表面(表面层表面){
mSurfaceAvailable=true;
试一试{
startIfReady();
}捕获(IOE异常){
Log.e(标签“无法启动相机源”,e);
}
}
@凌驾
公共空心表面置换(表面层表面){
mSurfaceAvailable=false;
}
@凌驾
公共空白表面更改(表面文件夹持有者、整型格式、整型宽度、整型高度){
}
}
@凌驾
仅限受保护的空心布局(布尔值已更改、整数左侧、整数顶部、整数右侧、整数底部){
整数宽度=320;
整数高度=240;
if(mCameraSource!=null){
Size Size=mCameraSource.getPreviewSize();
如果(大小!=null){
宽度=大小。getWidth();
高度=大小。getHeight();
}
}
//在纵向时交换宽度和高度大小,因为它将旋转90度
if(isPortraitMode()){
int tmp=宽度;
宽度=高度;
高度=tmp;
}
最终int布局宽度=右-左;
最终int layoutHeight=底部-顶部;
//计算可能进行拟合宽度的高度和宽度。
int childWidth=布局宽度;
int childHeight=layoutHeight;
//(int)(((浮动)布局宽度/(浮动)宽度)*高度);
/*
//如果使用“配合宽度”的“高度”太高,则不使用“配合高度”。
如果(儿童身高>布局高度){
childHeight=layouthweight;
childWidth=(int)((浮点)布局高度/(浮点)高度)*宽度);
}*/
对于(int i=0;i
现在,当我从CameraSource中捕获图像时,它会捕捉图像,但不会捕捉我在曲面视图上膨胀的图形覆盖。曲面视图也不允许我从中获取位图。如果我尝试获取根视图的屏幕截图,那么它只捕获图形覆盖,而不是曲面视图图像
我的应用程序正在处理fac的逻辑