package com.kernal.passportreader.sdk.view;
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import android.content.Context;
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import android.content.pm.PackageManager;
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import android.graphics.Point;
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import android.hardware.Camera;
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import android.util.Log;
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import android.view.SurfaceHolder;
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import android.view.SurfaceView;
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import com.kernal.passportreader.sdk.utils.CameraConfigurationManager;
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import com.kernal.passportreader.sdk.utils.CardScreenUtil;
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/**
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* @author A@H
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* @describle 自定义预览View,主要是相机预览的开启与关闭，对焦方式以及闪光灯
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*/
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public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
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private static final String TAG = CameraPreview.class.getSimpleName();
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private Camera mCamera;
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private boolean mPreviewing = true;
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private boolean mSurfaceCreated = false;
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private Camera.PreviewCallback mpreviewCallback;
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private CameraConfigurationManager mCameraConfigurationManager;
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public CameraPreview(Context context) {
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super(context);
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}
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public void setCamera(Camera camera, Camera.PreviewCallback previewCallback) {
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mCamera = camera;
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mpreviewCallback=previewCallback;
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if (mCamera != null) {
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mCameraConfigurationManager = new CameraConfigurationManager(getContext());
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mCameraConfigurationManager.initFromCameraParameters(mCamera);
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getHolder().addCallback(this);
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if (mPreviewing) {
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requestLayout();
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} else {
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showCameraPreview();
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}
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}
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}
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@Override
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public void surfaceCreated(SurfaceHolder surfaceHolder) {
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mSurfaceCreated = true;
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}
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@Override
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public void surfaceChanged(SurfaceHolder surfaceHolder, int format, int width, int height) {
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if (surfaceHolder.getSurface() == null) {
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return;
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}
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stopCameraPreview();
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post(new Runnable() {
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@Override
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public void run() {
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showCameraPreview();
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}
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});
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}
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@Override
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public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
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mSurfaceCreated = false;
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stopCameraPreview();
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}
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public void showCameraPreview() {
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if (mCamera != null) {
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try {
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mPreviewing = true;
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mCamera.setPreviewDisplay(getHolder());
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mCameraConfigurationManager.setDesiredCameraParameters(mCamera);
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mCamera.setOneShotPreviewCallback(mpreviewCallback);
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mCamera.startPreview();
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mCamera.autoFocus(autoFocusCB);
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} catch (Exception e) {
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Log.e(TAG, e.toString(), e);
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}
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}
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}
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public void stopCameraPreview() {
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if (mCamera != null) {
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try {
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removeCallbacks(doAutoFocus);
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mPreviewing = false;
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mCamera.cancelAutoFocus();
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mCamera.setOneShotPreviewCallback(null);
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mCamera.stopPreview();
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} catch (Exception e) {
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Log.e(TAG, e.toString(), e);
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}
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}
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}
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public void openFlashlight() {
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if (flashLightAvailable()) {
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mCameraConfigurationManager.openFlashlight(mCamera);
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}
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}
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public void closeFlashlight() {
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if (flashLightAvailable()) {
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mCameraConfigurationManager.closeFlashlight(mCamera);
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}
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}
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@Override
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public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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int width = getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec);
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int height = getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec);
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if (mCameraConfigurationManager != null && mCameraConfigurationManager.getCameraResolution() != null) {
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Point cameraResolution = mCameraConfigurationManager.getCameraResolution();
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// 取出来的cameraResolution高宽值与屏幕的高宽顺序是相反的
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int cameraPreviewWidth = cameraResolution.x;
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int cameraPreviewHeight = cameraResolution.y;
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if (width * 1f / height < cameraPreviewWidth * 1f / cameraPreviewHeight) {
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float ratio = cameraPreviewHeight * 1f / cameraPreviewWidth;
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width = (int) (height / ratio + 0.5f);
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} else {
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float ratio = cameraPreviewWidth * 1f / cameraPreviewHeight;
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height = (int) (width / ratio + 0.5f);
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}
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}
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super.onMeasure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
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}
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private boolean flashLightAvailable() {
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return mCamera != null && mPreviewing && mSurfaceCreated && getContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
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}
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private Runnable doAutoFocus = new Runnable() {
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@Override
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public void run() {
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if (mCamera != null && mPreviewing && mSurfaceCreated) {
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try {
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mCamera.autoFocus(autoFocusCB);
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} catch (Exception e) {
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}
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}
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}
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};
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Camera.AutoFocusCallback autoFocusCB = new Camera.AutoFocusCallback() {
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@Override
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public void onAutoFocus(boolean success, Camera camera) {
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if (success) {
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postDelayed(doAutoFocus, 1500);
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} else {
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postDelayed(doAutoFocus, 500);
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}
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}
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};
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public Point getPreViewSize() {
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if (mCameraConfigurationManager != null) {
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return mCameraConfigurationManager.getmPreviewResolution();
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}
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return null;
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}
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public float getScale() {
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float scale=1.0f;
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if (mCameraConfigurationManager != null) {
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float width=0;
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float height=0;
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if(ViewfinderView.width==0||ViewfinderView.height==0){
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width=(float)CardScreenUtil.getScreenResolution(getContext()).x;
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height=(float)CardScreenUtil.getScreenResolution(getContext()).y;
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}else{
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width=ViewfinderView.width;
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height=ViewfinderView.height;
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}
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float Wscale=((float)mCameraConfigurationManager.getCameraResolution().x /width);
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float Hscale=((float)mCameraConfigurationManager.getCameraResolution().y /height);
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scale=(Wscale<Hscale)?Wscale:Hscale;
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if(CardScreenUtil.getScreenOrientation(getContext())==CardScreenUtil.ORIENTATION_PORTRAIT){
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ViewfinderView.portraitWidth=(int)(mCameraConfigurationManager.getCameraResolution().x/scale);
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}
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return scale;
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}
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return scale;
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}
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public float getHscale(){
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float Hscale=((float)mCameraConfigurationManager.getCameraResolution().y /(float) CardScreenUtil.getScreenResolution(getContext()).y);
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return Hscale;
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}
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}
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