1、新增CaptureFragment
2、将扫码相关逻辑与界面分离，ZXingLite使用更容易扩展。
This commit is contained in:
jenly1314
522
lib/src/main/java/com/king/zxing/CaptureHelper.java
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522
lib/src/main/java/com/king/zxing/CaptureHelper.java
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/*
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* Copyright (C) 2019 Jenly Yu
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.king.zxing;
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import android.app.Activity;
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import android.content.Intent;
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import android.graphics.Bitmap;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.hardware.Camera;
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import android.support.v4.app.Fragment;
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import android.util.Log;
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import android.view.MotionEvent;
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import android.view.SurfaceHolder;
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import android.view.SurfaceView;
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import com.google.zxing.BarcodeFormat;
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import com.google.zxing.DecodeHintType;
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import com.google.zxing.Result;
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import com.king.zxing.camera.CameraManager;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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import java.util.Map;
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/**
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* @author <a href="mailto:jenly1314@gmail.com">Jenly</a>
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*/
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public class CaptureHelper implements CaptureLifecycle,CaptureTouchEvent,CaptureManager {
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public static final String TAG = CaptureHelper.class.getSimpleName();
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private Activity activity;
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private CaptureHandler captureHandler;
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private OnCaptureListener onCaptureListener;
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private CameraManager cameraManager;
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private InactivityTimer inactivityTimer;
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private BeepManager beepManager;
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private AmbientLightManager ambientLightManager;
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private ViewfinderView viewfinderView;
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private SurfaceHolder surfaceHolder;
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private SurfaceHolder.Callback callback;
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private Collection<BarcodeFormat> decodeFormats;
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private Map<DecodeHintType,?> decodeHints;
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private String characterSet;
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private boolean hasSurface;
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/**
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* 默认触控误差值
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*/
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private static final int DEVIATION = 6;
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/**
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* 是否支持缩放（变焦），默认支持
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*/
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private boolean isSupportZoom = true;
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private float oldDistance;
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/**
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* 是否支持连扫，默认不支持
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*/
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private boolean isContinuousScan = false;
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/**
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* 连扫时，是否自动重置预览和解码器，默认自动重置
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*/
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private boolean isAutoRestartPreviewAndDecode = true;
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/**
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* 是否播放音效
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*/
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private boolean isPlayBeep;
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/**
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* 是否震动
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*/
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private boolean isVibrate;
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private OnCaptureCallback onCaptureCallback;
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public CaptureHelper(Fragment fragment, SurfaceView surfaceView, ViewfinderView viewfinderView){
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this(fragment.getActivity(),surfaceView,viewfinderView);
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}
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public CaptureHelper(Activity activity,SurfaceView surfaceView,ViewfinderView viewfinderView){
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this.activity = activity;
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this.viewfinderView = viewfinderView;
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surfaceHolder = surfaceView.getHolder();
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hasSurface = false;
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}
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@Override
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public void onCreate(){
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inactivityTimer = new InactivityTimer(activity);
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beepManager = new BeepManager(activity);
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ambientLightManager = new AmbientLightManager(activity);
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cameraManager = new CameraManager(activity);
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callback = new SurfaceHolder.Callback() {
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@Override
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public void surfaceCreated(SurfaceHolder holder) {
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if (holder == 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(holder);
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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 holder) {
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hasSurface = false;
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}
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};
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onCaptureListener = new OnCaptureListener() {
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@Override
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public void onHandleDecode(Result result, Bitmap barcode, float scaleFactor) {
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inactivityTimer.onActivity();
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beepManager.playBeepSoundAndVibrate();
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onResult(result);
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}
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};
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//设置是否播放音效和震动
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beepManager.setPlayBeep(isPlayBeep);
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beepManager.setVibrate(isVibrate);
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}
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/**
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* {@link Activity#onResume()}
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*/
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@Override
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public void onResume(){
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beepManager.updatePrefs();
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ambientLightManager.start(cameraManager);
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inactivityTimer.onResume();
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surfaceHolder.addCallback(callback);
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if (hasSurface) {
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initCamera(surfaceHolder);
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} else {
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surfaceHolder.addCallback(callback);
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}
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}
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/**
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* {@link Activity#onPause()}
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*/
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@Override
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public void onPause(){
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if (captureHandler != null) {
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captureHandler.quitSynchronously();
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captureHandler = null;
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}
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inactivityTimer.onPause();
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ambientLightManager.stop();
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beepManager.close();
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cameraManager.closeDriver();
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if (!hasSurface) {
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surfaceHolder.removeCallback(callback);
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}
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}
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/**
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* {@link Activity#onDestroy()}
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*/
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@Override
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public void onDestroy(){
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inactivityTimer.shutdown();
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}
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/**
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* 支持缩放时，须在{@link Activity#onTouchEvent(MotionEvent)}调用此方法
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* @param event
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*/
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@Override
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public boolean onTouchEvent(MotionEvent event){
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if(isSupportZoom && cameraManager.isOpen()){
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Camera camera = cameraManager.getOpenCamera().getCamera();
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if(camera ==null){
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return false;
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}
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if(event.getPointerCount() > 1) {
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switch (event.getAction() & MotionEvent.ACTION_MASK) {//多点触控
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case MotionEvent.ACTION_POINTER_DOWN:
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oldDistance = calcFingerSpacing(event);
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break;
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case MotionEvent.ACTION_MOVE:
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float newDistance = calcFingerSpacing(event);
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if (newDistance > oldDistance + DEVIATION) {//
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handleZoom(true, camera);
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} else if (newDistance < oldDistance - DEVIATION) {
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handleZoom(false, camera);
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}
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oldDistance = newDistance;
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break;
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}
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return true;
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}
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}
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return false;
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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 (cameraManager.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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cameraManager.openDriver(surfaceHolder);
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// Creating the handler starts the preview, which can also throw a RuntimeException.
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if (captureHandler == null) {
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captureHandler = new CaptureHandler(activity,viewfinderView,onCaptureListener, decodeFormats, decodeHints, characterSet, cameraManager);
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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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/**
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* 处理变焦缩放
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* @param isZoomIn
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* @param camera
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*/
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private void handleZoom(boolean isZoomIn, Camera camera) {
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Camera.Parameters params = camera.getParameters();
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if (params.isZoomSupported()) {
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int maxZoom = params.getMaxZoom();
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int zoom = params.getZoom();
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if (isZoomIn && zoom < maxZoom) {
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zoom++;
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} else if (zoom > 0) {
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zoom--;
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}
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params.setZoom(zoom);
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camera.setParameters(params);
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} else {
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Log.i(TAG, "zoom not supported");
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}
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}
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/**
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* 聚焦
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* @param event
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* @param camera
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*/
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private void focusOnTouch(MotionEvent event,Camera camera) {
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Camera.Parameters params = camera.getParameters();
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Camera.Size previewSize = params.getPreviewSize();
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Rect focusRect = calcTapArea(event.getRawX(), event.getRawY(), 1f,previewSize);
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Rect meteringRect = calcTapArea(event.getRawX(), event.getRawY(), 1.5f,previewSize);
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Camera.Parameters parameters = camera.getParameters();
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if (parameters.getMaxNumFocusAreas() > 0) {
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List<Camera.Area> focusAreas = new ArrayList<>();
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focusAreas.add(new Camera.Area(focusRect, 600));
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parameters.setFocusAreas(focusAreas);
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}
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if (parameters.getMaxNumMeteringAreas() > 0) {
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List<Camera.Area> meteringAreas = new ArrayList<>();
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meteringAreas.add(new Camera.Area(meteringRect, 600));
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parameters.setMeteringAreas(meteringAreas);
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}
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final String currentFocusMode = params.getFocusMode();
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params.setFocusMode(Camera.Parameters.FOCUS_MODE_MACRO);
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camera.setParameters(params);
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camera.autoFocus(new Camera.AutoFocusCallback() {
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@Override
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public void onAutoFocus(boolean success, Camera camera) {
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Camera.Parameters params = camera.getParameters();
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params.setFocusMode(currentFocusMode);
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camera.setParameters(params);
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}
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});
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}
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/**
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* 计算两指间距离
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* @param event
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* @return
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*/
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private float calcFingerSpacing(MotionEvent event) {
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float x = event.getX(0) - event.getX(1);
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float y = event.getY(0) - event.getY(1);
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return (float) Math.sqrt(x * x + y * y);
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}
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/**
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* 计算对焦区域
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* @param x
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* @param y
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* @param coefficient
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* @param previewSize
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* @return
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*/
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private Rect calcTapArea(float x, float y, float coefficient, Camera.Size previewSize) {
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float focusAreaSize = 200;
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int areaSize = Float.valueOf(focusAreaSize * coefficient).intValue();
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int centerX = (int) ((x / previewSize.width) * 2000 - 1000);
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int centerY = (int) ((y / previewSize.height) * 2000 - 1000);
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int left = clamp(centerX - (areaSize / 2), -1000, 1000);
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int top = clamp(centerY - (areaSize / 2), -1000, 1000);
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RectF rectF = new RectF(left, top, left + areaSize, top + areaSize);
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return new Rect(Math.round(rectF.left), Math.round(rectF.top),
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Math.round(rectF.right), Math.round(rectF.bottom));
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}
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/**
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*
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* @param x
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* @param min
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* @param max
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* @return
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*/
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private int clamp(int x, int min, int max) {
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if (x > max) {
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return max;
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}
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if (x < min) {
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return min;
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}
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return x;
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}
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/**
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* 重新启动扫码和解码器
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*/
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public void restartPreviewAndDecode(){
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if(captureHandler!=null){
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captureHandler.restartPreviewAndDecode();
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}
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}
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/**
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* 接收扫码结果，想支持连扫时，可将{@link #continuousScan(boolean)}设置为{@code true}
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* 如果{@link #isContinuousScan}支持连扫，则默认重启扫码和解码器；当连扫逻辑太复杂时，
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* 请将{@link #autoRestartPreviewAndDecode(boolean)}设置为{@code false}，并手动调用{@link #restartPreviewAndDecode()}
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* @param result 扫码结果
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*/
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public void onResult(Result result){
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String text = result.getText();
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if(isContinuousScan){
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if(isAutoRestartPreviewAndDecode){
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if(onCaptureCallback!=null){
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onCaptureCallback.onResultCallback(text);
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}
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restartPreviewAndDecode();
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}
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}else{
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//如果设置了回调，并且onCallback返回为true，则表示拦截
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if(onCaptureCallback!=null && onCaptureCallback.onResultCallback(text)){
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return;
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}
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Intent intent = new Intent();
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intent.putExtra(Intents.Scan.RESULT,text);
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activity.setResult(Activity.RESULT_OK,intent);
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activity.finish();
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}
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}
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/**
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* 设置是否连续扫码，如果想支持连续扫码，则将此方法返回{@code true}并重写{@link #onResult(Result)}
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*/
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public CaptureHelper continuousScan(boolean isContinuousScan){
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this.isContinuousScan = isContinuousScan;
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return this;
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}
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/**
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* 设置是否自动重启扫码和解码器，当支持连扫时才起作用。
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* @return 默认返回 true
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*/
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public CaptureHelper autoRestartPreviewAndDecode(boolean isAutoRestartPreviewAndDecode){
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this.isAutoRestartPreviewAndDecode = isAutoRestartPreviewAndDecode;
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return this;
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}
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/**
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* 设置是否播放音效
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* @return
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*/
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public CaptureHelper playBeep(boolean playBeep){
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this.isPlayBeep = playBeep;
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if(beepManager!=null){
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beepManager.setPlayBeep(playBeep);
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}
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return this;
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}
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/**
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* 设置是否震动
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* @return
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*/
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public CaptureHelper vibrate(boolean vibrate){
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this.isVibrate = vibrate;
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if(beepManager!=null){
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beepManager.setVibrate(vibrate);
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}
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return this;
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}
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/**
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* 设置是否支持缩放
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* @param supportZoom
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* @return
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*/
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public CaptureHelper supportZoom(boolean supportZoom) {
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isSupportZoom = supportZoom;
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return this;
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}
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/**
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*
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* @param decodeFormats
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* @return
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*/
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public CaptureHelper decodeFormats(Collection<BarcodeFormat> decodeFormats) {
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this.decodeFormats = decodeFormats;
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return this;
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}
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/**
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*
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* @param decodeHints
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* @return
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*/
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public CaptureHelper decodeHints(Map<DecodeHintType,?> decodeHints) {
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this.decodeHints = decodeHints;
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return this;
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}
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/**
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*
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* @param characterSet
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* @return
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*/
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public CaptureHelper characterSet(String characterSet) {
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this.characterSet = characterSet;
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return this;
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}
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/**
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* 设置扫码回调
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* @param callback
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* @return
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*/
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public CaptureHelper setOnCaptureCallback(OnCaptureCallback callback) {
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this.onCaptureCallback = callback;
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return this;
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}
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@Override
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public CameraManager getCameraManager() {
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return cameraManager;
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}
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@Override
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public BeepManager getBeepManager() {
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return beepManager;
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}
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@Override
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public AmbientLightManager getAmbientLightManager() {
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return ambientLightManager;
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}
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@Override
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public InactivityTimer getInactivityTimer() {
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return inactivityTimer;
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}
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}
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Reference in New Issue
Block a user