如何获得Surfaceview android的普通相机的看法？ [英] How to get normal Camera view in Surfaceview android?

问题描述

现在，我正在做一个示例应用程序在那里我有surfaceview使用相机。我已经成功设置surfaceview相机，但我在那里不能得到正常的摄像机视图，宽度和高度得到改变。下面是我的code，我很高兴地从任何人得到任何想法。

Right now, i am doing an sample app where i have to use camera in surfaceview. I have successfully set the camera in surfaceview but i can't get the normal camera view in it, width and height gets changed. Below is my code, i am pleased to get any ideas from anyone.

Camera类：

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.camera);
            cameraObject = isCameraAvailiable();
    showCamera = new ShowCamera(this, cameraObject);
    preview.addView(showCamera);
            takePhotoButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
        cameraObject.takePicture(null, null, capturedIt);
        cameraObject.stopPreview();
        preview.removeView(showCamera);
        cameraObject.release();
        cameraObject = Camera.open();
        showCamera = new ShowCamera(Photo.this, cameraObject);

        preview.addView(showCamera);
        }
    });
}

SurfaceHolder类：

SurfaceHolder class:

public class ShowCamera extends SurfaceView implements SurfaceHolder.Callback {

private SurfaceHolder holdMe;
private Camera theCamera;

public ShowCamera(Context context, Camera camera) {
    super(context);
    theCamera = camera;
    holdMe = getHolder();
    holdMe.addCallback(this);
}

public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {
    theCamera.stopPreview();
    theCamera.setDisplayOrientation(90);
    camWidth = width;
    camHeight = height;
    theCamera.startPreview();
    initPreview(width, height);
}

private void initPreview(int width, int height) {
    // Log.i(TAG, "initPreview()starts");

    if (theCamera != null) {
        try {
             Camera.Parameters param;
             param = camera.getParameters();
             param.setPreviewSize(176, 144);
             camera.setParameters(param);
            theCamera.setPreviewDisplay(holdMe);
        } catch (Throwable t) {
            Log.e("PreviewDemo-surfaceCallback",
                    "Exception in setPreviewDisplay()", t);
        }
    }

    // Log.i(TAG, "initPreview() ends");
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
    try {
        theCamera.setDisplayOrientation(90);
        theCamera.setPreviewDisplay(holdme);
        theCamera.startPreview();
    } catch (IOException e) {
    }
}

public void surfaceDestroyed(SurfaceHolder arg0) {
    this.getHolder().removeCallback(this);
    theCamera.stopPreview();
    theCamera.release();
}

}

Framelayout.xml

Framelayout.xml

<FrameLayout
    android:id="@+id/preview1"
    android:layout_width="match_parent"
    android:layout_height="200dp"
    android:layout_alignParentLeft="true">

</FrameLayout>

推荐答案

如果你希望你的显示相机不变形，你应该重写 layout_height 对于 preVIEW 框架。如果您知道该相机支持176×144 preVIEW大小，这是你真的想用什么，后来干脆设置的布局参数的 preVIEW

If you want your to display the camera without distortion, you should override layout_height for preview frame. If you know that the camera supports 176x144 preview size, and this is what you really want to use, then simply set the layout parameters of preview,

showCamera = new ShowCamera(this, cameraObject);

ViewGroup.LayoutParams lp = preview.getLayoutParams();
lp.width = getWindowManager().getDefaultDisplay().getWidth();
//*** no, this is wrong!! ***   lp.height = lp.width*144/176;
lp.height = lp.width*176/144; // that's correct for Camera.setDisplayOrientation(90) !!
preview.setLayoutParams(lp);

preview.addView(showCamera);

这篇关于如何获得Surfaceview android的普通相机的看法？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！