vcam虚拟摄像头安卓版， VCAM模块下载， 手机虚拟摄像头免费版【免ROOT】

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代码说明：

使用MediaProjection API获取屏幕内容 创建VirtualDisplay虚拟显示设备 需要用户授权才能开始捕获 此代码仅为演示原理，实际虚拟摄像头需要更多处理 注意事项：

完整实现需要处理视频编码和传输 需要添加适当的权限声明 不同安卓版本API限制不同 真正的免ROOT虚拟摄像头通常需要特殊设备厂商支持 建议考虑现有解决方案如：

DroidCam等成熟应用 使用ADB over TCP实现屏幕共享 特定设备厂商提供的虚拟摄像头API

源码部分：

package com.example.virtualcam;

import android.app.Service; import android.content.Intent; import android.hardware.display.DisplayManager; import android.media.projection.MediaProjection; import android.media.projection.MediaProjectionManager; import android.os.IBinder; import android.util.DisplayMetrics; import android.view.Surface;

public class ScreenCaptureService extends Service { private static final int REQUEST_CODE = 100; private MediaProjection mMediaProjection; private VirtualDisplay mVirtualDisplay;

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    MediaProjectionManager projectionManager = 
        (MediaProjectionManager) getSystemService(MEDIA_PROJECTION_SERVICE);
    
    if (intent != null) {
        mMediaProjection = projectionManager.getMediaProjection(
            REQUEST_CODE, intent.getParcelableExtra("data"));
        
        startCapture();
    }
    return START_STICKY;
}

private void startCapture() {
    DisplayMetrics metrics = getResources().getDisplayMetrics();
    int width = metrics.widthPixels;
    int height = metrics.heightPixels;
    int density = metrics.densityDpi;
    
    mVirtualDisplay = mMediaProjection.createVirtualDisplay(
        "ScreenCapture",
        width, height, density,
        DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
        null, null, null);
}

@Override
public void onDestroy() {
    if (mVirtualDisplay != null) {
        mVirtualDisplay.release();
    }
    if (mMediaProjection != null) {
        mMediaProjection.stop();
    }
    super.onDestroy();
}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

}

package com.vcam.core;

import android.content.Context; import android.graphics.ImageFormat; import android.hardware.Camera; import android.media.Image; import android.media.ImageReader; import android.media.projection.MediaProjection; import android.os.Handler; import android.os.HandlerThread; import android.util.Log; import android.view.Surface;

public class VCamCore { private static final String TAG = "VCamCore"; private Context mContext; private ImageReader mImageReader; private HandlerThread mBackgroundThread; private Handler mBackgroundHandler; private MediaProjection mMediaProjection; private VirtualDisplay mVirtualDisplay; private Camera mCamera;

public VCamCore(Context context) {
    mContext = context;
    setupBackgroundThread();
}

private void setupBackgroundThread() {
    mBackgroundThread = new HandlerThread("VCamThread");
    mBackgroundThread.start();
    mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
}

public void startCapture(int width, int height, int dpi) {
    mImageReader = ImageReader.newInstance(
        width, height, ImageFormat.YUV_420_888, 2);
    
    mBackgroundHandler.post(() -> {
        try {
            mVirtualDisplay = mMediaProjection.createVirtualDisplay(
                "VCamDisplay",
                width, height, dpi,
                DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC,
                mImageReader.getSurface(), null, null);
            
            mImageReader.setOnImageAvailableListener(
                reader -> processImage(reader.acquireNextImage()), 
                mBackgroundHandler);
        } catch (Exception e) {
            Log.e(TAG, "Error starting capture", e);
        }
    });
}

private void processImage(Image image) {
    // 实现YUV到RGB转换和编码逻辑
    ByteBuffer yBuffer = image.getPlanes()[0].getBuffer();
    ByteBuffer uBuffer = image.getPlanes()[1].getBuffer();
    ByteBuffer vBuffer = image.getPlanes()[2].getBuffer();
    
    // 图像处理代码...
    image.close();
}

public void release() {
    if (mVirtualDisplay != null) {
        mVirtualDisplay.release();
    }
    if (mImageReader != null) {
        mImageReader.close();
    }
    mBackgroundThread.quitSafely();
}

}

package com.vcam.service;

import android.app.Service; import android.content.Intent; import android.os.IBinder; import android.os.RemoteException;

public class VCamService extends Service { private VCamCore mVCamCore;

@Override
public void onCreate() {
    super.onCreate();
    mVCamCore = new VCamCore(this);
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    if (intent != null) {
        MediaProjection projection = intent.getParcelableExtra("projection");
        int width = intent.getIntExtra("width", 1280);
        int height = intent.getIntExtra("height", 720);
        int dpi = intent.getIntExtra("dpi", 320);
        
        mVCamCore.setMediaProjection(projection);
        mVCamCore.startCapture(width, height, dpi);
    }
    return START_STICKY;
}

@Override
public void onDestroy() {
    mVCamCore.release();
    super.onDestroy();
}

@Override
public IBinder onBind(Intent intent) {
    return mBinder;
}

private final IVCamService.Stub mBinder = new IVCamService.Stub() {
    @Override
    public void setVideoSource(int source) throws RemoteException {
        // 实现视频源切换
    }
    
    @Override
    public void setResolution(int width, int height) throws RemoteException {
        // 实现分辨率设置
    }
};

}