重新启动自定义相机,在预览模式下进行更改时,从横向到纵向或纵向到横向,我的Surface类代码如下所示：
PreviewSurface.java:-
public class PreviewSurface extends SurfaceView implements
SurfaceHolder.Callback {
public static final String LOG_TAG = "CameraPreview";
private SurfaceHolder mSurfaceHolder;
private Camera mCamera;
// Constructor that obtains context and camera
@SuppressWarnings("deprecation")
public PreviewSurface(Context context,Camera camera) {
super(context);
this.mCamera = camera;
this.mSurfaceHolder = this.getHolder();
this.mSurfaceHolder.addCallback(this);
this.mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
this.mSurfaceHolder.setFixedSize(100,100);
}
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
try {
Camera.Parameters parameters = mCamera.getParameters();
if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE)
{
parameters.set("orientation","portrait");
mCamera.setDisplayOrientation(90);
parameters.setRotation(90);
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
}
else
{
// This is an undocumented although widely known feature
parameters.set("orientation","landscape");
// For Android 2.2 and above
mCamera.setDisplayOrientation(0);
// Uncomment for Android 2.0 and above
parameters.setRotation(0);
}
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
// left blank for now
}
}
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
mCamera.stopPreview();
mCamera.release();
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder,int format,int width,int height) {
try {
Camera.Parameters parameters = mCamera.getParameters();
if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
parameters.set("orientation","portrait");
mCamera.setDisplayOrientation(90);
parameters.setRotation(90);
}
else {
// This is an undocumented although widely known feature
parameters.set("orientation","landscape");
// For Android 2.2 and above
mCamera.setDisplayOrientation(0);
// Uncomment for Android 2.0 and above
parameters.setRotation(0);
}
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
// left blank for now
}
}
}
我可以知道我在哪里做错了,我在代码中错过了什么？
解决方法
您必须处理应用程序的配置更改.
将此行添加到AndroidManifest.xml.
android:configChanges="keyboardHidden|orientation|screenSize"
This tells the system what configuration changes you are going to handle yourself – in this case by doing nothing.
希望它有助于ツ
