package com.zxing.scanner;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Point;
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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.google.zxing.Result;
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import com.zxing.scanner.camera.CameraManager;
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import com.zxing.scanner.common.Scanner;
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import java.io.IOException;
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/**
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* Created by hupei on 2017/12/13.
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*/
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class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback, ScannerViewHandler.HandleDecodeListener {
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private static final String TAG = CameraSurfaceView.class.getSimpleName();
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private ScannerView mScannerView;
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private boolean hasSurface;
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private CameraManager mCameraManager;
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private ScannerViewHandler mScannerViewHandler;
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private boolean lightMode = false;//闪光灯，默认关闭
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private ScannerOptions mScannerOptions;
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CameraSurfaceView(Context context, ScannerView scannerView) {
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super(context);
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this.mScannerView = scannerView;
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hasSurface = false;
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}
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void onResume(ScannerOptions scannerOptions) {
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this.mScannerOptions = scannerOptions;
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this.mCameraManager = new CameraManager(getContext(), mScannerOptions);
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this.mScannerViewHandler = null;
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SurfaceHolder surfaceHolder = getHolder();
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if (hasSurface) {
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// The activity was paused but not stopped, so the surface still
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// exists. Therefore
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// surfaceCreated() won't be called, so init the camera here.
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initCamera(surfaceHolder);
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} else {
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// Install the callback and wait for surfaceCreated() to init the
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// camera.
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surfaceHolder.addCallback(this);
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}
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}
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private void initCamera(SurfaceHolder surfaceHolder) {
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if (surfaceHolder == null) {
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throw new IllegalStateException("No SurfaceHolder provided");
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}
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if (mCameraManager.isOpen()) {
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Log.w(TAG, "initCamera() while already open -- late SurfaceView callback?");
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return;
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}
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try {
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mCameraManager.openDriver(surfaceHolder);
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requestLayout();
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mCameraManager.setTorch(lightMode);
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// Creating the mScannerViewHandler starts the preview, which can also throw a
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// RuntimeException.
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if (mScannerViewHandler == null) {
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mScannerViewHandler = new ScannerViewHandler(mScannerOptions, mCameraManager,this);
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}
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} catch (IOException ioe) {
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Log.w(TAG, ioe);
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} catch (RuntimeException e) {
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// Barcode Scanner has seen crashes in the wild of this variety:
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// java.?lang.?RuntimeException: Fail to connect to camera service
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Log.w(TAG, "Unexpected error initializing camera", e);
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}
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}
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void onPause() {
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if (mScannerViewHandler != null) {
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mScannerViewHandler.quitSynchronously();
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mScannerViewHandler = null;
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}
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mCameraManager.closeDriver();
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}
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void setTorch(boolean mode) {
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this.lightMode = mode;
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if (mCameraManager != null) mCameraManager.setTorch(lightMode);
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}
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void restartPreviewAfterDelay(long delayMS) {
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if (mScannerViewHandler != null)
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mScannerViewHandler.sendEmptyMessageDelayed(Scanner.RESTART_PREVIEW, delayMS);
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}
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@Override
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public void surfaceCreated(SurfaceHolder surfaceHolder) {
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// if (surfaceHolder == null) {
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// Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
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// }
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if (!hasSurface) {
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hasSurface = true;
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initCamera(surfaceHolder);
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}
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}
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@Override
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public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
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}
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@Override
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public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
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hasSurface = false;
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if (!hasSurface && surfaceHolder != null) {
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surfaceHolder.removeCallback(this);
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}
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}
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CameraManager getCameraManager() {
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return mCameraManager;
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}
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@Override
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public void restartPreview() {
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mScannerView.drawViewfinder();
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}
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@Override
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public void decodeSucceeded(Result rawResult, Bitmap barcode, float scaleFactor) {
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mScannerView.handleDecode(rawResult, barcode, scaleFactor);
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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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boolean portrait = true;
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if (mCameraManager != null) {
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portrait = mCameraManager.isPortrait();
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if (portrait && mCameraManager.getCameraResolution() != null) {
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Point cameraResolution = mCameraManager.getCameraResolution();
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int cameraPreviewWidth = cameraResolution.y;
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int cameraPreviewHeight = cameraResolution.x;
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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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}
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if (portrait) {
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super.onMeasure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY),
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MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY));
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} else {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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}
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}
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}
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