の上に私のコードを考えattatchingてる
、これは画面サイズに基づいて異なる結果を生成します。
あなたは次のように、あなたがあなた自身のカメラのプレビューを定義することができます別のアプローチを検討する必要があります。
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 previewWidth = 320;
int previewHeight = 240;
if (mCameraSource != null) {
Size size = mCameraSource.getPreviewSize();
if (size != null) {
previewWidth = size.getWidth();
previewHeight = size.getHeight();
}
}
// Swap width and height sizes when in portrait, since it will be rotated 90 degrees
if (isPortraitMode()) {
int tmp = previewWidth;
previewWidth = previewHeight;
previewHeight = tmp;
}
final int viewWidth = right - left;
final int viewHeight = bottom - top;
int childWidth;
int childHeight;
int childXOffset = 0;
int childYOffset = 0;
float widthRatio = (float) viewWidth/(float) previewWidth;
float heightRatio = (float) viewHeight/(float) previewHeight;
// To fill the view with the camera preview, while also preserving the correct aspect ratio,
// it is usually necessary to slightly oversize the child and to crop off portions along one
// of the dimensions. We scale up based on the dimension requiring the most correction, and
// compute a crop offset for the other dimension.
if (widthRatio > heightRatio) {
childWidth = viewWidth;
childHeight = (int) ((float) previewHeight * widthRatio);
childYOffset = (childHeight - viewHeight)/2;
} else {
childWidth = (int) ((float) previewWidth * heightRatio);
childHeight = viewHeight;
childXOffset = (childWidth - viewWidth)/2;
}
for (int i = 0; i < getChildCount(); ++i) {
// One dimension will be cropped. We shift child over or up by this offset and adjust
// the size to maintain the proper aspect ratio.
getChildAt(i).layout(
-1 * childXOffset, -1 * childYOffset,
childWidth - childXOffset, childHeight - childYOffset);
}
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;
}
}
で:
は、カメラプレビュークラスを作成します。あなたのlayout.xmlはカスタムプレビューを追加します:
<yourpackagename.CameraSourcePreview
android:id="@+id/preview"
android:layout_width="match_parent"
android:layout_height="match_parent">
アクティビティクラス内
、カメラソースメソッドを定義し、あなたがして)(のonCreateでメソッドを呼び出すことができます
/** *カメラソースを開始または再起動し、それならば存在する。カメラソースが作成される前に、 *(カメラソースが作成される前にonResumeが呼び出されたなど)のカメラソースがまだ存在しない場合は、 *となります。 */
private void startCameraSource() {
// check that the device has play services available.
int code = GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(
getApplicationContext());
if (code != ConnectionResult.SUCCESS) {
Dialog dlg =
GoogleApiAvailability.getInstance().getErrorDialog(this, code, RC_HANDLE_GMS);
dlg.show();
}
if (mCameraSource != null) {
try {
mPreview.start(mCameraSource, mGraphicOverlay);
} catch (IOException e) {
Log.e(TAG, "Unable to start camera source.", e);
mCameraSource.release();
mCameraSource = null;
}
}
}
/** * は、カメラを再起動します。
@Override
protected void onResume() {
super.onResume();
startCameraSource();
}
/** * */
は、カメラを停止します。 */ @Override
protected void onPause() {
super.onPause();
mPreview.stop();
}
/**
* Releases the resources associated with the camera source, the associated detector, and the
* rest of the processing pipeline.
*/
@Override
protected void onDestroy() {
super.onDestroy();
if (mCameraSource != null) {
mCameraSource.release();
}
}
いい例です。 – ArturS