CODEWITHSUNDEEP
androidandroid-camerasurfaceview
skornos
skornos

Reputation: 3281

Android center CameraPreview on SurfaceView

I am working on the face detection application for Android (my device is Nexus S with Android 4.1.2). My SurfaceView size is automatically set to 800x480 but my maximal camera resolution is 720x480. I have tried to change the size of SurfaceView in its onLayout() method which worked but then I was missing 80px in the preview. Is it possible to stretch or at least center the CameraPreview?

Thanks

Upvotes: 2

Views: 2737

Answers (2)

C.J. Windisch
C.J. Windisch

Reputation: 309

If anybody else runs into this issue - the way to center the camera preview is with a FrameLayout:

<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/surfacecontainer">
    <android.view.SurfaceView
        android:id="@+id/cameraPreview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"/>
</FrameLayout>

More details can be found here.

Upvotes: 1

Sohyun Ahn
Sohyun Ahn

Reputation: 250

CameraPreview size can be changed using Camera.Parameters. But I recommend that put the surfaceview on the center of screen. Here's the code. I didn't execute the code, but it may works.

// Center the child SurfaceView within the parent.
final int width = r - l;
final int height = b - t;
if (width * previewHeight > height * previewWidth) {
    final int surfaceViewWidth = previewWidth * height / previewHeight;
    surfaceView.layout((int)((width - surfaceViewWidth)*0.5), 0, (int)((width + surfaceViewWidth)*0.5), height);
} else {
    final int surfaceViewHeight = previewHeight * width / previewWidth;
    surfaceView.layout(0, (int)((height - surfaceViewHeight)*0.5), width, (int)((height + surfaceViewHeight)*0.5));
}

Upvotes: 2

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