百度文字SDK识别DEMO-Eclipse版本【完美运行】

/* * Copyright (C) 2017 Baidu, Inc. All Rights Reserved. */ package com.baidu.ocr.demo.tomenter.ui.camera; import java.nio.ByteBuffer; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.Comparator; import java.util.List; import java.util.concurrent.Semaphore; import java.util.concurrent.TimeUnit; import java.util.concurrent.atomic.AtomicBoolean; import android.Manifest; import android.annotation.TargetApi; import android.content.Context; import android.content.pm.PackageManager; import android.graphics.ImageFormat; import android.graphics.Matrix; import android.graphics.Point; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.SurfaceTexture; import android.hardware.camera2.CameraAccessException; import android.hardware.camera2.CameraCaptureSession; import android.hardware.camera2.CameraCharacteristics; import android.hardware.camera2.CameraDevice; import android.hardware.camera2.CameraManager; import android.hardware.camera2.CameraMetadata; import android.hardware.camera2.CaptureFailure; import android.hardware.camera2.CaptureRequest; import android.hardware.camera2.CaptureResult; import android.hardware.camera2.TotalCaptureResult; import android.hardware.camera2.params.StreamConfigurationMap; import android.media.Image; import android.media.ImageReader; import android.os.Build; import android.os.Handler; import android.os.HandlerThread; import android.support.annotation.NonNull; import android.support.v4.content.ContextCompat; import android.util.Size; import android.util.SparseIntArray; import android.view.Surface; import android.view.TextureView; import android.view.View; import android.view.WindowManager; @TargetApi(Build.VERSION_CODES.LOLLIPOP) public class Camera2Control implements ICameraControl { @Override public void setDetectCallback(OnDetectPictureCallback callback) { // TODO 暂时只用camera } @Override public AtomicBoolean getAbortingScan() { // TODO 暂时只用camera return null; } /** * Conversion from screen rotation to JPEG orientation. */ private static final SparseIntArray ORIENTATIONS = new SparseIntArray(); private static final int MAX_PREVIEW_SIZE = 2048; static { ORIENTATIONS.append(Surface.ROTATION_0, 90); ORIENTATIONS.append(Surface.ROTATION_90, 0); ORIENTATIONS.append(Surface.ROTATION_180, 270); ORIENTATIONS.append(Surface.ROTATION_270, 180); } private static final int STATE_PREVIEW = 0; private static final int STATE_WAITING_FOR_LOCK = 1; private static final int STATE_WAITING_FOR_CAPTURE = 2; private static final int STATE_CAPTURING = 3; private static final int STATE_PICTURE_TAKEN = 4; private static final int MAX_PREVIEW_WIDTH = 1920; private static final int MAX_PREVIEW_HEIGHT = 1080; private int flashMode; private int orientation = 0; private int state = STATE_PREVIEW; private Context context; private OnTakePictureCallback onTakePictureCallback; private PermissionCallback permissionCallback; private String cameraId; private TextureView textureView; private Size previewSize; private Rect previewFrame = new Rect(); private HandlerThread backgroundThread; private Handler backgroundHandler; private ImageReader imageReader; private CameraCaptureSession captureSession; private CameraDevice cameraDevice; private CaptureRequest.Builder previewRequestBuilder; private CaptureRequest previewRequest; private Semaphore cameraLock = new Semaphore(1); private int sensorOrientation; @Override public void start() { startBackgroundThread(); if (textureView.isAvailable()) { openCamera(textureView.getWidth(), textureView.getHeight()); textureView.setSurfaceTextureListener(surfaceTextureListener); } else { textureView.setSurfaceTextureListener(surfaceTextureListener); } } @Override public void stop() { textureView.setSurfaceTextureListener(null); closeCamera(); stopBackgroundThread(); } @Override public void pause() { setFlashMode(FLASH_MODE_OFF); } @Override public void resume() { state = STATE_PREVIEW; } @Override public View getDisplayView() { return textureView; } @Override public Rect getPreviewFrame() { return previewFrame; } @Override public void takePicture(OnTakePictureCallback callback) { this.onTakePictureCallback = callback; // 拍照第一步，对焦 lockFocus(); } @Override public void setPermissionCallback(PermissionCallback callback) { this.permissionCallback = callback; } @Override public void setDisplayOrientation(@CameraView.Orientation int displayOrientation) { this.orientation = displayOrientation / 90; } @Override public void refreshPermission() { openCamera(textureView.getWidth(), textureView.getHeight()); } @Override public void setFlashMode(@FlashMode int flashMode) { if (this.flashMode == flashMode) { return; } this.flashMode = flashMode; try { previewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE); updateFlashMode(flashMode, previewRequestBuilder); previewRequest = previewRequestBuilder.build(); captureSession.setRepeatingRequest(previewRequest, captureCallback, backgroundHandler); } catch (Exception e) { e.printStackTrace(); } } @Override public int getFlashMode() { return flashMode; } public Camera2Control(Context activity) { this.context = activity; textureView = new TextureView(activity); } private final TextureView.SurfaceTextureListener surfaceTextureListener = new TextureView.SurfaceTextureListener() { @Override public void onSurfaceTextureAvailable(SurfaceTexture texture, int width, int height) { openCamera(width, height); } @Override public void onSurfaceTextureSizeChanged(SurfaceTexture texture, int width, int height) { configureTransform(width, height); previewFrame.left = 0; previewFrame.top = 0; previewFrame.right = width; previewFrame.bottom = height; } @Override public boolean onSurfaceTextureDestroyed(SurfaceTexture texture) { stop(); return true; } @Override public void onSurfaceTextureUpdated(SurfaceTexture texture) { } }; private void openCamera(int width, int height) { // 6.0+的系统需要检查系统权限 。 if (ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { requestCameraPermission(); return; } setUpCameraOutputs(width, height); configureTransform(width, height); CameraManager manager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE); try { if (!cameraLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) { throw new RuntimeException("Time out waiting to lock camera opening."); } manager.openCamera(cameraId, deviceStateCallback, backgroundHandler); } catch (CameraAccessException e) { e.printStackTrace(); } catch (InterruptedException e) { throw new RuntimeException("Interrupted while trying to