Android 使用新的API 21获取相机预览
我想重用我在网上为一个旧项目找到的“CameraPreview”类,现在我想再次使用该类,因为旧类Camera已被弃用,建议使用。不幸的是,他们已经改变了所有的方法,我找不到一种方法来用这个新方法纠正我的类。有人知道吗 类摄影机预览:Android 使用新的API 21获取相机预览,android,android-studio,android-camera,Android,Android Studio,Android Camera,我想重用我在网上为一个旧项目找到的“CameraPreview”类,现在我想再次使用该类,因为旧类Camera已被弃用,建议使用。不幸的是,他们已经改变了所有的方法,我找不到一种方法来用这个新方法纠正我的类。有人知道吗 类摄影机预览: import android.content.Context; import android.hardware.Camera; import android.hardware.Camera.AutoFocusCallback; import andro
import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PreviewCallback;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import java.io.IOException;
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback
{
private SurfaceHolder mHolder;
private Camera mCamera;
private PreviewCallback previewCallback;
private AutoFocusCallback autoFocusCallback;
public CameraPreview(Context context, Camera camera,PreviewCallback previewCb,AutoFocusCallback autoFocusCb)
{
super(context);
mCamera = camera;
previewCallback = previewCb;
autoFocusCallback = autoFocusCb;
// Set camera to continuous focus if supported, otherwise use
// software auto-focus. Only works for API level >=9.
// Camera.Parameters parameters = camera.getParameters();
// for (String f : parameters.getSupportedFocusModes()) {
// if (f == Parameters.FOCUS_MODE_CONTINUOUS_PICTURE) {
// mCamera.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
// autoFocusCallback = null;
// break;
// }
// }
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
mHolder = getHolder();
mHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, now tell the camera where to draw the preview.
try
{
mCamera.setPreviewDisplay(holder);
} catch (IOException e) {
Log.d("DBG", "Error setting camera preview: " + e.getMessage());
}
}
public void surfaceDestroyed(SurfaceHolder holder)
{
// Camera preview released in activity
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
/*
* If your preview can change or rotate, take care of those events here.
* Make sure to stop the preview before resizing or reformatting it.
*/
if (mHolder.getSurface() == null){
// preview surface does not exist
return;
}
// stop preview before making changes
try {
mCamera.stopPreview();
} catch (Exception e){
// ignore: tried to stop a non-existent preview
}
try {
// Hard code camera surface rotation 90 degs to match Activity view in portrait
mCamera.setDisplayOrientation(90);
mCamera.setPreviewDisplay(mHolder);
mCamera.setPreviewCallback(previewCallback);
mCamera.startPreview();
mCamera.autoFocus(autoFocusCallback);
} catch (Exception e){
Log.d("DBG", "Error starting camera preview: " + e.getMessage());
}
}
}
新的camera2 API有一种完全不同的工作方式,因此我建议您在这里查看GitHub上提供的基本示例: 您也不必切换到新的API—旧的android.hardware.Camera API已被弃用,但仍像以前一样工作。它最终会被移除,但这需要很长时间才能实现