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Камера Android не работает. startPreview не работает

Я получаю эти ошибки от LogCat:

10-30 00:31:51.494: D/CameraHal(1205): CameraHal setOverlay/1/00000000/00000000
10-30 00:31:51.494: E/CameraHal(1205): Trying to set overlay, but overlay is null!, line:3472
10-30 00:31:51.494: W/CameraService(1205): Overlay create failed - retrying
...
10-30 00:31:52.526: E/CameraService(1205): Overlay Creation Failed!
...
10-30 00:31:52.588: E/AndroidRuntime(5040): FATAL EXCEPTION: main
10-30 00:31:52.588: E/AndroidRuntime(5040): java.lang.RuntimeException: startPreview failed
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.hardware.Camera.startPreview(Native Method)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at com.matthewmitchell.nightcam.CameraSurfaceView.surfaceCreated(CameraSurfaceView.java:47)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.SurfaceView.updateWindow(SurfaceView.java:544)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.SurfaceView.dispatchDraw(SurfaceView.java:341)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.View.draw(View.java:6743)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.ViewGroup.drawChild(ViewGroup.java:1640)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.ViewGroup.drawChild(ViewGroup.java:1638)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.View.draw(View.java:6743)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.widget.FrameLayout.draw(FrameLayout.java:352)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1876)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.ViewRoot.draw(ViewRoot.java:1407)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.ViewRoot.performTraversals(ViewRoot.java:1163)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.os.Looper.loop(Looper.java:123)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at android.app.ActivityThread.main(ActivityThread.java:4627)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at java.lang.reflect.Method.invokeNative(Native Method)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at java.lang.reflect.Method.invoke(Method.java:521)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-30 00:31:52.588: E/AndroidRuntime(5040):     at dalvik.system.NativeStart.main(Native Method)

Вот класс Activity:

public class NightCamActivity extends Activity {
    private GLSurfaceView mGLView;
    CameraSurfaceView surface_view;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Create a GLSurfaceView instance and set it
        // as the ContentView for this Activity
        Debug.out("Welcome");
        surface_view = new CameraSurfaceView(this);
        mGLView = new MySurfaceView(this);
        setContentView(mGLView);
        addContentView(surface_view, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
    }

    @Override
    protected void onPause() {
        super.onPause();
        // The following call pauses the rendering thread.
        // If your OpenGL application is memory intensive,
        // you should consider de-allocating objects that
        // consume significant memory here.
        mGLView.onPause();
    }

    @Override
    protected void onResume() {
        super.onResume();
        // The following call resumes a paused rendering thread.
        // If you de-allocated graphic objects for onPause()
        // this is a good place to re-allocate them.
        mGLView.onResume();
    }
}

Класс MySurfaceView:

class MySurfaceView extends GLSurfaceView{

    public MySurfaceView(NightCamActivity context){
        super(context);
        // Create an OpenGL ES 2.0 context.
        Debug.out("Mysurfaceview welcome");
        setEGLContextClientVersion(2);
        // Set the Renderer for drawing on the GLSurfaceView
        MyRenderer renderer = new MyRenderer();
        renderer.takeContext(context);
        context.surface_view.renderer = renderer;
        setRenderer(renderer);
    }
}

Класс CameraSurfaceView:

public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback, PreviewCallback  {

    private Camera camera;
    Camera.Size use_size;
    MyRenderer renderer;

    public CameraSurfaceView(Context context) {
        super(context);
        SurfaceHolder holder = getHolder();
        holder.addCallback(this);
        Debug.out("Init CSV");
        camera = Camera.open();
    }

    public void surfaceCreated(SurfaceHolder holder) {
        Debug.out("SC");
        try {
            camera.setPreviewDisplay(holder);
        } catch (IOException e) {
            Debug.out("Could not set preview display for camera.");
        }
        camera.setPreviewCallback(this);
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        // Surface will be destroyed when we return, so stop the preview.
        // Because the CameraDevice object is not a shared resource, it very
        // important to release it when the activity is paused.
        try {
            if (camera != null) {
                camera.stopPreview();  
                camera.release();
            }
        } catch (Exception e) {
            Debug.out("Camera release failure.");
        }
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        Camera.Parameters parameters = camera.getParameters();
        List<Camera.Size> supportedPreviewSizes = parameters.getSupportedPreviewSizes();
        Camera.Size optimalPreviewSize = getOptimalPreviewSize(supportedPreviewSizes, w, h);
        if (optimalPreviewSize != null) {
            parameters.setPreviewSize(optimalPreviewSize.width, optimalPreviewSize.height);
            camera.setParameters(parameters);
            camera.startPreview();
        }
    }
    static Camera.Size getOptimalPreviewSize(List<Camera.Size> sizes, int w, int h) {
        final double ASPECT_TOLERANCE = 0.1;
        final double MAX_DOWNSIZE = 1.5;

        double targetRatio = (double) w / h;
        if (sizes == null) return null;

        Camera.Size optimalSize = null;
        double minDiff = Double.MAX_VALUE;

        int targetHeight = h;

        // Try to find an size match aspect ratio and size
        for (Camera.Size size : sizes) {
            double ratio = (double) size.width / size.height;
            double downsize = (double) size.width / w;
            if (downsize > MAX_DOWNSIZE) {
                //if the preview is a lot larger than our display surface ignore it
                //reason - on some phones there is not enough heap available to show the larger preview sizes 
                continue;
            }
            if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }

        // Cannot find the one match the aspect ratio, ignore the requirement
        //keep the max_downsize requirement
        if (optimalSize == null) {
            minDiff = Double.MAX_VALUE;
            for (Camera.Size size : sizes) {
                double downsize = (double) size.width / w;
                if (downsize > MAX_DOWNSIZE) {
                    continue;
                }
                if (Math.abs(size.height - targetHeight) < minDiff) {
                    optimalSize = size;
                    minDiff = Math.abs(size.height - targetHeight);
                }
            }
        }
        //everything else failed, just take the closest match
        if (optimalSize == null) {
            minDiff = Double.MAX_VALUE;
            for (Camera.Size size : sizes) {
                if (Math.abs(size.height - targetHeight) < minDiff) {
                    optimalSize = size;
                    minDiff = Math.abs(size.height - targetHeight);
                }
            }
        }

        return optimalSize;
    }

    public void onPreviewFrame(byte[] data, Camera arg1) {
        Debug.out("PREVIEW FRAME:");
        byte[] pixels = new byte[use_size.width * use_size.height * 3]; ;
        decodeYUV420SP(pixels, data, use_size.width,  use_size.height); 
        renderer.bindCameraTexture(pixels, use_size.width,  use_size.height);
    }

    void decodeYUV420SP(byte[] rgb, byte[] yuv420sp, int width, int height) {  

        final int frameSize = width * height;  

        for (int j = 0, yp = 0; j < height; j++) {       
            int uvp = frameSize + (j >> 1) * width, u = 0, v = 0;  
            for (int i = 0; i < width; i++, yp++) {  
                int y = (0xff & ((int) yuv420sp[yp])) - 16;  
                if (y < 0){  
                    y = 0; 
                }
                if ((i & 1) == 0) {  
                    v = (0xff & yuv420sp[uvp++]) - 128;  
                    u = (0xff & yuv420sp[uvp++]) - 128;  
                }  

                int y1192 = 1192 * y;  
                int r = (y1192 + 1634 * v);  
                int g = (y1192 - 833 * v - 400 * u);  
                int b = (y1192 + 2066 * u);  

                if (r < 0){
                    r = 0;               
                }else if (r > 262143){  
                    r = 262143; 
                }
                if (g < 0){                  
                    g = 0;               
                }else if (g > 262143){
                    g = 262143; 
                }
                if (b < 0){                  
                    b = 0;               
                }else if (b > 262143){
                    b = 262143; 
                }
                rgb[yp*3] = (byte) (b << 6);
                rgb[yp*3 + 1] = (byte) (b >> 2);
                rgb[yp*3 + 2] = (byte) (b >> 10);
            }  
        }  
    }  

}

Наконец, класс MyRender:

public class MyRenderer implements GLSurfaceView.Renderer{
    private FloatBuffer vertices;
    private FloatBuffer texcoords;
    private int mProgram;
    private int maPositionHandle;
    private int gvTexCoordHandle;
    private int gvSamplerHandle;
    private static Context context;
    int[] camera_texture;
    public void onSurfaceCreated(GL10 unused, EGLConfig config) {
        initShapes();
        GLES20.glClearColor(0.0f, 1.0f, 0.2f, 1.0f);
        Debug.out("Hello init.");
        //Shaders
        int vertexShader = 0;
        int fragmentShader = 0;
        try {
            vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, readFile("vertex.vsh"));
            fragmentShader = loadShader(GLES20.GL_FRAGMENT_SHADER, readFile("fragment.fsh"));
        } catch (IOException e) {
            Debug.out("The shaders could not be found.");
            e.printStackTrace();
        }
        mProgram = GLES20.glCreateProgram();             // create empty OpenGL Program
        GLES20.glAttachShader(mProgram, vertexShader);   // add the vertex shader to program
        GLES20.glAttachShader(mProgram, fragmentShader); // add the fragment shader to program
        GLES20.glLinkProgram(mProgram);                  // creates OpenGL program executables
        // get handles
        maPositionHandle = GLES20.glGetAttribLocation(mProgram, "vPosition");
        gvTexCoordHandle = GLES20.glGetAttribLocation(mProgram, "a_texCoord");
        gvSamplerHandle = GLES20.glGetAttribLocation(mProgram, "s_texture");
        GLES20.glPixelStorei(GLES20.GL_UNPACK_ALIGNMENT, 1);
        camera_texture = null;
    }


    private void initShapes(){
        float triangleCoords[] = {
            // X, Y, Z
            -1.0f, -1.0f, 0.0f,
             1.0f, -1.0f, 0.0f,
             -1.0f, 1.0f, 0.0f,
             1.0f,  1.0f, 0.0f,
        }; 
        float texcoordf[] = {
            // X, Y, Z
            -1.0f,-1.0f,
            1.0f,-1.0f,
            -1.0f,1.0f,
            1.0f,1.0f,
        };

        // initialize vertex Buffer for vertices
        ByteBuffer vbb = ByteBuffer.allocateDirect(triangleCoords.length * 4); 
        vbb.order(ByteOrder.nativeOrder());// use the device hardware native byte order
        vertices = vbb.asFloatBuffer();  // create a floating point buffer from the ByteBuffer
        vertices.put(triangleCoords);    // add the coordinates to the FloatBuffer
        vertices.position(0);            // set the buffer to read the first coordinate
        // initialize vertex Buffer for texcoords 
        vbb = ByteBuffer.allocateDirect(texcoordf.length * 4); 
        vbb.order(ByteOrder.nativeOrder());// use the device hardware native byte order
        texcoords = vbb.asFloatBuffer();  // create a floating point buffer from the ByteBuffer
        texcoords.put(texcoordf);    // add the coordinates to the FloatBuffer
        texcoords.position(0);            // set the buffer to read the first coordinate
    }

    private static String readFile(String path) throws IOException {
        AssetManager assetManager = context.getAssets();
        InputStream stream = assetManager.open(path);
        try {
            return new Scanner(stream).useDelimiter("\\A").next();
        }
        finally {
            stream.close();
        }
    }

    private int loadShader(int type, String shaderCode){
        // create a vertex shader type (GLES20.GL_VERTEX_SHADER)
        // or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
        int shader = GLES20.glCreateShader(type); 
        // add the source code to the shader and compile it
        GLES20.glShaderSource(shader, shaderCode);
        GLES20.glCompileShader(shader);
        return shader;
    }

    public void onDrawFrame(GL10 unused) {
        GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
        if(camera_texture == null){
            return;
        }
        // Add program to OpenGL environment
        GLES20.glUseProgram(mProgram);
        // Prepare the triangle data
        GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false, 0, vertices);
        GLES20.glVertexAttribPointer(gvTexCoordHandle, 2, GLES20.GL_FLOAT, false, 0, texcoords);
        GLES20.glEnableVertexAttribArray(maPositionHandle);
        GLES20.glEnableVertexAttribArray(gvTexCoordHandle);
        GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
        GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, camera_texture[0]);
        GLES20.glUniform1i(gvSamplerHandle, 0);
        // Draw the triangle
        GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
        GLES20.glDisableVertexAttribArray(maPositionHandle);
        GLES20.glDisableVertexAttribArray(gvTexCoordHandle);
    }

    public void onSurfaceChanged(GL10 unused, int width, int height) {
        GLES20.glViewport(0, 0, width, height);
    }

    public void takeContext(Context ocontext) {
        Debug.out("Take context");
        context = ocontext;
    }

    void bindCameraTexture(byte[] data,int w,int h) {
        byte[] pixels = new byte[256*256*3];
        for(int x = 0;x < 256;x++){
            for(int y = 0;x < 256;x++){
                pixels[x*256+y] = data[x*w+y];
            }
        }
        if (camera_texture==null){
            camera_texture=new int[1];
        }else{
            GLES20.glDeleteTextures(1, camera_texture, 0);
        }   
        GLES20.glGenTextures(1, camera_texture, 0);
        int tex = camera_texture[0];
        GLES20.glBindTexture(GL10.GL_TEXTURE_2D, tex);
        GLES20.glTexImage2D(GL10.GL_TEXTURE_2D, 0, GL10.GL_RGB, 256, 256, 0, GL10.GL_RGB, GL10.GL_UNSIGNED_BYTE, ByteBuffer.wrap(pixels));
        GLES20.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR);
    }
}
4b9b3361

ОТВЕТЫ

Ответ 1

Я взял ваш код и получил ту же ошибку, что и вы. Однако при отладке мне кажется, что предварительный просмотр может быть неудачным, потому что казалось, что размеры ширины и высоты были неправильными, но это не просто случай их переключения, поскольку я думаю, что ориентация также играет роль.

В любом случае, я заменил свой CameraSurfaceView своим (см. ниже), и я думаю, что он работает сейчас. Нет никакого исключения, но экран полностью ярко-зеленый (я думаю, это может быть потому, что у меня нет файлов vertex.vsh или fragment.vsh.

package stackOverflow.test;

import java.io.IOException;
import java.util.List;

import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.Size;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Display;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;

public class CameraSurfaceView extends ViewGroup implements SurfaceHolder.Callback
{

private Size mPreviewSize;
private List<Size> mSupportedPreviewSizes;        
private Context mContext;
private SurfaceView mSurfaceView;
private SurfaceHolder mHolder;
private final String TAG = "CameraSurfaceView";
private Camera mCamera;
private List<String> mSupportedFlashModes;

public CameraSurfaceView(Context context)
{
    super(context);
    mContext = context;
    mCamera = Camera.open();        
    setCamera(mCamera);

    mSurfaceView = new SurfaceView(context);
    addView(mSurfaceView, 0);        
    mHolder = mSurfaceView.getHolder();
    mHolder.addCallback(this);
    mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    mHolder.setKeepScreenOn(true);
}

public CameraSurfaceView(Context context, AttributeSet attrs)
{
    super(context, attrs);
    mContext = context;            
}

public void setSupportedPreviewSizes(List<Size> supportedPreviewSizes)
{
    mSupportedPreviewSizes = supportedPreviewSizes;
}

public Size getPreviewSize()
{
    return mPreviewSize;
}

public void setCamera(Camera camera)
{
    mCamera = camera;
    if (mCamera != null)
    {
        mSupportedPreviewSizes = mCamera.getParameters().getSupportedPreviewSizes();                
        mSupportedFlashModes = mCamera.getParameters().getSupportedFlashModes();
        // Set the camera to Auto Flash mode.
        if (mSupportedFlashModes.contains(Camera.Parameters.FLASH_MODE_AUTO))
        {
            Camera.Parameters parameters = mCamera.getParameters();
            parameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);             
            mCamera.setParameters(parameters);
        }                   
    }
    requestLayout();
}

@Override
public void surfaceDestroyed(SurfaceHolder holder)
{
    // Surface will be destroyed when we return, so stop the preview.
    if (mCamera != null)
    {
        mCamera.stopPreview();
    }
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
    // Now that the size is known, set up the camera parameters and begin
    // the preview.
    if (mCamera != null)
    {
        Camera.Parameters parameters = mCamera.getParameters();        
        Size previewSize = getPreviewSize();
        parameters.setPreviewSize(previewSize.width, previewSize.height);                

        mCamera.setParameters(parameters);
        mCamera.startPreview();
    }

}

@Override
public void surfaceCreated(SurfaceHolder holder)
{
    // The Surface has been created, acquire the camera and tell it where
    // to draw.
    try
    {
        if (mCamera != null)
        {
            mCamera.setPreviewDisplay(holder);
        }
    }
    catch (IOException exception)
    {
        Log.e(TAG, "IOException caused by setPreviewDisplay()", exception);
    }
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{        
    final int width = resolveSize(getSuggestedMinimumWidth(), widthMeasureSpec);
    final int height = resolveSize(getSuggestedMinimumHeight(), heightMeasureSpec);
    setMeasuredDimension(width, height);

    if (mSupportedPreviewSizes != null)
    {
        mPreviewSize = getOptimalPreviewSize(mSupportedPreviewSizes, width, height);
    }
}

@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom)
{
    if (changed)
    {                            
        final View cameraView = getChildAt(0);          

        final int width = right - left;
        final int height = bottom - top;

        int previewWidth = width;
        int previewHeight = height;
        if (mPreviewSize != null)
        {
            Display display = ((WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();

            switch (display.getRotation())
            {
                case Surface.ROTATION_0:
                    previewWidth = mPreviewSize.height;
                    previewHeight = mPreviewSize.width;
                    mCamera.setDisplayOrientation(90);
                    break;
                case Surface.ROTATION_90:
                    previewWidth = mPreviewSize.width;
                    previewHeight = mPreviewSize.height;
                    break;
                case Surface.ROTATION_180:
                    previewWidth = mPreviewSize.height;
                    previewHeight = mPreviewSize.width;
                    break;
                case Surface.ROTATION_270:
                    previewWidth = mPreviewSize.width;
                    previewHeight = mPreviewSize.height;
                    mCamera.setDisplayOrientation(180);
                    break;
            }                                    
        }

        final int scaledChildHeight = previewHeight * width / previewWidth;

        cameraView.layout(0, height - scaledChildHeight, width, height);

    }
}


private Size getOptimalPreviewSize(List<Size> sizes, int width, int height)
{           
    Size optimalSize = null;                                

    final double ASPECT_TOLERANCE = 0.1;
    double targetRatio = (double) height / width;

    // Try to find a size match which suits the whole screen minus the menu on the left.
    for (Size size : sizes)
    {
        if (size.height != width) continue;
        double ratio = (double) size.width / size.height;
        if (ratio <= targetRatio + ASPECT_TOLERANCE && ratio >= targetRatio - ASPECT_TOLERANCE)
        {
            optimalSize = size;
        }               
    }

    // If we cannot find the one that matches the aspect ratio, ignore the requirement.
    if (optimalSize == null)
    {
        // TODO : Backup in case we don't get a size.
    }

    return optimalSize;
}

public void previewCamera()
{        
    try 
    {           
        mCamera.setPreviewDisplay(mHolder);         
        mCamera.startPreview();                 
    }
    catch(Exception e)
    {
        Log.d(TAG, "Cannot start preview.", e);    
    }
}


/*public void onPreviewFrame(byte[] data, Camera arg1) { 
    Log.d("CameraSurfaceView", "PREVIEW FRAME:"); 
    byte[] pixels = new byte[use_size.width * use_size.height * 3]; ; 
    decodeYUV420SP(pixels, data, use_size.width,  use_size.height);  
    renderer.bindCameraTexture(pixels, use_size.width,  use_size.height); 
}*/ 

void decodeYUV420SP(byte[] rgb, byte[] yuv420sp, int width, int height) {   

    final int frameSize = width * height;   

    for (int j = 0, yp = 0; j < height; j++) {        
        int uvp = frameSize + (j >> 1) * width, u = 0, v = 0;   
        for (int i = 0; i < width; i++, yp++) {   
            int y = (0xff & ((int) yuv420sp[yp])) - 16;   
            if (y < 0){   
                y = 0;  
            } 
            if ((i & 1) == 0) {   
                v = (0xff & yuv420sp[uvp++]) - 128;   
                u = (0xff & yuv420sp[uvp++]) - 128;   
            }   

            int y1192 = 1192 * y;   
            int r = (y1192 + 1634 * v);   
            int g = (y1192 - 833 * v - 400 * u);   
            int b = (y1192 + 2066 * u);   

            if (r < 0){ 
                r = 0;                
            }else if (r > 262143){   
                r = 262143;  
            } 
            if (g < 0){                   
                g = 0;                
            }else if (g > 262143){ 
                g = 262143;  
            } 
            if (b < 0){                   
                b = 0;                
            }else if (b > 262143){ 
                b = 262143;  
            } 
            rgb[yp*3] = (byte) (b << 6); 
            rgb[yp*3 + 1] = (byte) (b >> 2); 
            rgb[yp*3 + 2] = (byte) (b >> 10); 
        }   
    }   
  }   
}

Вы заметите, что я прокомментировал ваш метод onPreviewFrame(), чтобы запустить его, а также строку context.surface_view.renderer = renderer.

Я не знаком с библиотекой OpenGL, но, возможно, этого достаточно, чтобы вы снова пошли.

Ответ 2

У меня была такая же проблема, и удаление/игра с настройками размера предварительного просмотра не работало для меня. Я исправил его следующей строкой кода:

mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

Теперь он отлично работает для меня!

Ответ 3

Проверьте свой лог-код на что-то похожее, прямо перед вашим исключением:

11-02 09:25:44.305: ERROR/QualcommCameraHardware(56): failed to construct master heap for pmem pool /dev/pmem_adsp
11-02 09:25:44.305: ERROR/QualcommCameraHardware(56): initPreview X: could not initialize preview heap.
11-02 09:25:44.305: ERROR/QualcommCameraHardware(56): startPreview X initPreview failed.  Not starting preview.

Это происходит на моем телефоне в альбомной ориентации, когда я пытаюсь установить размер предварительного просмотра 1024x768. Метод getSupportedPreviewSizes() говорит, что этот размер поддерживается, однако ОС, похоже, не выделяет достаточно памяти для предварительного просмотра этого большого размера. Установка меньшего размера работает.

Кроме того, попробуйте код ниже. Вы должны вызвать startPreview() из метода surfaceChanged(), в этот момент известны размеры вашего SurfaceView. Вызов из метода surfaceCreated() слишком рано.

Используйте это, чтобы определить оптимальный размер предварительного просмотра для заданного размера SurfaceView (адаптированный из образца Google CameraPreview).

static Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
    final double ASPECT_TOLERANCE = 0.1;
    final double MAX_DOWNSIZE = 1.5;

    double targetRatio = (double) w / h;
    if (sizes == null) return null;

    Size optimalSize = null;
    double minDiff = Double.MAX_VALUE;

    int targetHeight = h;

    // Try to find an size match aspect ratio and size
    for (Size size : sizes) {
        double ratio = (double) size.width / size.height;
        double downsize = (double) size.width / w;
        if (downsize > MAX_DOWNSIZE) {
            //if the preview is a lot larger than our display surface ignore it
            //reason - on some phones there is not enough heap available to show the larger preview sizes 
            continue;
        }
        if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
        if (Math.abs(size.height - targetHeight) < minDiff) {
            optimalSize = size;
            minDiff = Math.abs(size.height - targetHeight);
        }
    }

    // Cannot find the one match the aspect ratio, ignore the requirement
    //keep the max_downsize requirement
    if (optimalSize == null) {
        minDiff = Double.MAX_VALUE;
        for (Size size : sizes) {
            double downsize = (double) size.width / w;
            if (downsize > MAX_DOWNSIZE) {
                continue;
            }
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }
    }
    //everything else failed, just take the closest match
    if (optimalSize == null) {
        minDiff = Double.MAX_VALUE;
        for (Size size : sizes) {
            if (Math.abs(size.height - targetHeight) < minDiff) {
                optimalSize = size;
                minDiff = Math.abs(size.height - targetHeight);
            }
        }
    }

    return optimalSize;
}

Вы бы назвали это из вашего метода surfaceChanged(), например:

public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
    Camera.Parameters parameters = camera.getParameters();
    List<Size> supportedPreviewSizes = parameters.getSupportedPreviewSizes();
    Size optimalPreviewSize = getOptimalPreviewSize(supportedPreviewSizes, w, h);
    if (optimalPreviewSize != null) {
        parameters.setPreviewSize(optimalPreviewSize.width, optimalPreviewSize.height);
        camera.setParameters(parameters);
        camera.startPreview();
    }
}

Ответ 4

Попробуйте установить тип поверхности в initCamera().

private void initCamera() {
mCamSV = (SurfaceView)findViewById(R.id.surface_camera);
mCamSH = mCamSV.getHolder();
mCamSH.addCallback(this);
**mCamSH.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);**

}

ИЗМЕНИТЬ 1

Я копирую все файлы здесь, которые работали для меня с Android 2.2 sdk

Деятельность

package com.stack.camera;


import java.io.IOException;

import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.WindowManager;
import android.widget.FrameLayout;

public class CameraStackActivity extends Activity implements SurfaceHolder.Callback {
    private Camera mCam;
    private SurfaceView mCamSV;
    private SurfaceHolder mCamSH;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.main);
    initCamera();
}

@Override
public void onDestroy() {
    stopCamera();
}

public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {

    startCamera(holder, width, height);
}

public void surfaceCreated(SurfaceHolder holder) {
    // TODO Auto-generated method stub
    mCam = Camera.open();
    try {
        mCam.setPreviewDisplay(holder);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

public void surfaceDestroyed(SurfaceHolder holder) {
    // TODO Auto-generated method stub

}

private void initCamera() {
    mCamSV = (SurfaceView)findViewById(R.id.surface_camera);
    mCamSH = mCamSV.getHolder();
    mCamSH.addCallback(this);
    mCamSH.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

}


private void startCamera(SurfaceHolder sh, int width, int height) {
    Camera.Parameters p = mCam.getParameters();
    // Camera.Size s = p.getSupportedPreviewSizes().get(0);
    p.setPreviewSize(width, height);

    mCam.setParameters(p);

    try {
        mCam.setPreviewDisplay(sh);
    } catch (Exception e) {
    }

    mCam.startPreview();
}

private void stopCamera() {
    mCamSH.removeCallback(this);

    mCam.stopPreview();
    mCam.release();
}
}

Разметка

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <SurfaceView android:id="@+id/surface_camera"
        android:layout_width="fill_parent" android:layout_height="fill_parent" />
</FrameLayout>

Файл манифеста

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.stack.camera"
      android:versionCode="1"
      android:versionName="1.0">

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name="CameraStackActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
</manifest>

Ответ 5

На самом деле не связан с вопросом OP, но тем не менее...

Я видел следующую подсказку, дающую мне java.io.IOException: setPreviewDisplay failed:

Если вы делаете как видео, так и фотографию, есть две функции: camera.unlock() и camera.reconnect(). Перед записью видео и камеры .reconnect() перед съемкой перед камерой необходимо выполнить функцию camera.unlock().

Ответ 6

Простое решение: в своем классе CameraSurfaceView добавьте эту строку:

holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

ниже этих строк:

SurfaceHolder holder = getHolder();
        holder.addCallback(this);

Ответ 7

Я немного опоздал на эту игру, но я работал с кордорой, и у меня было два плагина, которые пытались зарегистрироваться для камеры одновременно.

Не уверен, что это когда-нибудь будет полезно для всех, кроме меня.