lib -> zxing-lite
This commit is contained in:
580
zxing-lite/src/main/java/com/king/zxing/ViewfinderView.java
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580
zxing-lite/src/main/java/com/king/zxing/ViewfinderView.java
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@@ -0,0 +1,580 @@
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package com.king.zxing;
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/*
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* Copyright (C) 2008 ZXing authors
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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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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.LinearGradient;
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import android.graphics.Paint;
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import android.graphics.Point;
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import android.graphics.Rect;
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import android.graphics.RectF;
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import android.graphics.Shader;
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import android.text.Layout;
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import android.text.StaticLayout;
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import android.text.TextPaint;
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import android.text.TextUtils;
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import android.util.AttributeSet;
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import android.util.DisplayMetrics;
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import android.util.TypedValue;
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import android.view.View;
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import androidx.annotation.ColorInt;
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import androidx.annotation.ColorRes;
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import androidx.annotation.Nullable;
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import androidx.core.content.ContextCompat;
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import static com.king.zxing.ViewfinderView.FrameGravity.*;
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/**
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* This view is overlaid on top of the camera preview. It adds the viewfinder rectangle and partial
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* transparency outside it, as well as the laser scanner animation and result points.
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*
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* @author dswitkin@google.com (Daniel Switkin)
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*/
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public class ViewfinderView extends View {
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private static final int CURRENT_POINT_OPACITY = 0xA0;
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private static final int MAX_RESULT_POINTS = 20;
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private static final int POINT_SIZE = 30;
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/**
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* 画笔
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*/
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private Paint paint;
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/**
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* 文本画笔
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*/
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private TextPaint textPaint;
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/**
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* 扫码框外面遮罩颜色
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*/
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private int maskColor;
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/**
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* 扫描区域边框颜色
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*/
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private int frameColor;
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/**
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* 扫描线颜色
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*/
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private int laserColor;
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/**
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* 扫码框四角颜色
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*/
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private int cornerColor;
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/**
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* 提示文本与扫码框的边距
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*/
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private float labelTextPadding;
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/**
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* 提示文本的宽度
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*/
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private int labelTextWidth;
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/**
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* 提示文本的位置
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*/
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private TextLocation labelTextLocation;
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/**
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* 扫描区域提示文本
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*/
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private String labelText;
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/**
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* 扫描区域提示文本颜色
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*/
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private int labelTextColor;
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/**
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* 提示文本字体大小
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*/
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private float labelTextSize;
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/**
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* 扫描线开始位置
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*/
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public int scannerStart = 0;
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/**
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* 扫描线结束位置
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*/
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public int scannerEnd = 0;
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/**
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* 扫码框宽
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*/
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private int frameWidth;
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/**
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* 扫码框高
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*/
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private int frameHeight;
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/**
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* 扫描激光线风格
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*/
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private LaserStyle laserStyle;
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/**
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* 网格列数
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*/
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private int gridColumn;
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/**
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* 网格高度
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*/
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private int gridHeight;
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/**
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* 扫码框
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*/
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private Rect frame;
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/**
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* 扫描区边角的宽
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*/
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private int cornerRectWidth;
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/**
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* 扫描区边角的高
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*/
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private int cornerRectHeight;
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/**
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* 扫描线每次移动距离
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*/
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private int scannerLineMoveDistance;
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/**
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* 扫描线高度
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*/
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private int scannerLineHeight;
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/**
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* 边框线宽度
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*/
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private int frameLineWidth;
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/**
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* 扫描动画延迟间隔时间 默认20毫秒
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*/
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private int scannerAnimationDelay;
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/**
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* 扫码框占比
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*/
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private float frameRatio;
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/**
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* 扫码框内间距
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*/
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private float framePaddingLeft;
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private float framePaddingTop;
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private float framePaddingRight;
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private float framePaddingBottom;
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/**
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* 扫码框对齐方式
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*/
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private FrameGravity frameGravity;
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private Point point;
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private int pointColor;
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private int pointStrokeColor;
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private float pointRadius;
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private float pointStrokeRatio = 1.2f;
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public enum LaserStyle{
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NONE(0),LINE(1),GRID(2);
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private int mValue;
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LaserStyle(int value){
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mValue = value;
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}
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private static LaserStyle getFromInt(int value){
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for(LaserStyle style : LaserStyle.values()){
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if(style.mValue == value){
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return style;
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}
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}
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return LaserStyle.LINE;
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}
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}
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public enum TextLocation {
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TOP(0),BOTTOM(1);
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private int mValue;
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TextLocation(int value){
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mValue = value;
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}
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private static TextLocation getFromInt(int value){
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for(TextLocation location : TextLocation.values()){
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if(location.mValue == value){
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return location;
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}
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}
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return TextLocation.TOP;
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}
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}
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public enum FrameGravity {
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CENTER(0), LEFT(1), TOP(2), RIGHT(3), BOTTOM(4);
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private int mValue;
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FrameGravity(int value) {
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mValue = value;
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}
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private static FrameGravity getFromInt(int value) {
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for (FrameGravity gravity : values()) {
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if (gravity.mValue == value) {
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return gravity;
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}
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}
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return CENTER;
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}
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}
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public ViewfinderView(Context context) {
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this(context,null);
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}
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public ViewfinderView(Context context, @Nullable AttributeSet attrs) {
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this(context, attrs,0);
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}
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public ViewfinderView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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init(context,attrs);
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}
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private void init(Context context, AttributeSet attrs) {
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//初始化自定义属性信息
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TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.ViewfinderView);
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maskColor = array.getColor(R.styleable.ViewfinderView_maskColor, ContextCompat.getColor(context,R.color.viewfinder_mask));
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frameColor = array.getColor(R.styleable.ViewfinderView_frameColor, ContextCompat.getColor(context,R.color.viewfinder_frame));
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cornerColor = array.getColor(R.styleable.ViewfinderView_cornerColor, ContextCompat.getColor(context,R.color.viewfinder_corner));
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laserColor = array.getColor(R.styleable.ViewfinderView_laserColor, ContextCompat.getColor(context,R.color.viewfinder_laser));
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labelText = array.getString(R.styleable.ViewfinderView_labelText);
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labelTextColor = array.getColor(R.styleable.ViewfinderView_labelTextColor, ContextCompat.getColor(context,R.color.viewfinder_text_color));
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labelTextSize = array.getDimension(R.styleable.ViewfinderView_labelTextSize, TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,14f,getResources().getDisplayMetrics()));
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labelTextPadding = array.getDimension(R.styleable.ViewfinderView_labelTextPadding,TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,24,getResources().getDisplayMetrics()));
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labelTextWidth = array.getDimensionPixelSize(R.styleable.ViewfinderView_labelTextWidth,0);
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labelTextLocation = TextLocation.getFromInt(array.getInt(R.styleable.ViewfinderView_labelTextLocation,0));
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frameWidth = array.getDimensionPixelSize(R.styleable.ViewfinderView_frameWidth,0);
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frameHeight = array.getDimensionPixelSize(R.styleable.ViewfinderView_frameHeight,0);
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laserStyle = LaserStyle.getFromInt(array.getInt(R.styleable.ViewfinderView_laserStyle,LaserStyle.LINE.mValue));
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gridColumn = array.getInt(R.styleable.ViewfinderView_gridColumn,20);
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gridHeight = (int)array.getDimension(R.styleable.ViewfinderView_gridHeight,TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,40,getResources().getDisplayMetrics()));
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cornerRectWidth = (int)array.getDimension(R.styleable.ViewfinderView_cornerRectWidth,TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,4,getResources().getDisplayMetrics()));
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cornerRectHeight = (int)array.getDimension(R.styleable.ViewfinderView_cornerRectHeight,TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,16,getResources().getDisplayMetrics()));
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scannerLineMoveDistance = (int)array.getDimension(R.styleable.ViewfinderView_scannerLineMoveDistance,TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,2,getResources().getDisplayMetrics()));
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scannerLineHeight = (int)array.getDimension(R.styleable.ViewfinderView_scannerLineHeight,TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,5,getResources().getDisplayMetrics()));
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frameLineWidth = (int)array.getDimension(R.styleable.ViewfinderView_frameLineWidth,TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,1,getResources().getDisplayMetrics()));
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scannerAnimationDelay = array.getInteger(R.styleable.ViewfinderView_scannerAnimationDelay,20);
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frameRatio = array.getFloat(R.styleable.ViewfinderView_frameRatio,0.625f);
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framePaddingLeft = array.getDimension(R.styleable.ViewfinderView_framePaddingLeft,0);
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framePaddingTop = array.getDimension(R.styleable.ViewfinderView_framePaddingTop,0);
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framePaddingRight = array.getDimension(R.styleable.ViewfinderView_framePaddingRight,0);
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framePaddingBottom = array.getDimension(R.styleable.ViewfinderView_framePaddingBottom,0);
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frameGravity = FrameGravity.getFromInt(array.getInt(R.styleable.ViewfinderView_frameGravity, CENTER.mValue));
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array.recycle();
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pointColor = laserColor;
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pointStrokeColor = Color.WHITE;
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pointRadius = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,10,getResources().getDisplayMetrics());
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paint = new Paint(Paint.ANTI_ALIAS_FLAG);
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textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
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}
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private DisplayMetrics getDisplayMetrics(){
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return getResources().getDisplayMetrics();
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}
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public void setLabelText(String labelText) {
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this.labelText = labelText;
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}
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public void setLabelTextColor(@ColorInt int color) {
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this.labelTextColor = color;
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}
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public void setLabelTextColorResource(@ColorRes int id){
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this.labelTextColor = ContextCompat.getColor(getContext(),id);
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}
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public void setLabelTextSize(float textSize) {
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this.labelTextSize = textSize;
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}
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@Override
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protected void onSizeChanged(int w, int h, int oldw, int oldh) {
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super.onSizeChanged(w, h, oldw, oldh);
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initFrame(w,h);
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}
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private void initFrame(int width,int height){
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int size = (int)(Math.min(width,height) * frameRatio);
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if(frameWidth <= 0 || frameWidth > width){
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frameWidth = size;
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}
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if(frameHeight <= 0 || frameHeight > height){
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frameHeight = size;
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}
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if(labelTextWidth <= 0){
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labelTextWidth = width - getPaddingLeft() - getPaddingRight();
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}
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float leftOffsets = (width - frameWidth) / 2 + framePaddingLeft - framePaddingRight;
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float topOffsets = (height - frameHeight) / 2 + framePaddingTop - framePaddingBottom;
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switch (frameGravity){
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case LEFT:
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leftOffsets = framePaddingLeft;
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break;
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case TOP:
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topOffsets = framePaddingTop;
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break;
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case RIGHT:
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leftOffsets = width - frameWidth + framePaddingRight;
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break;
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case BOTTOM:
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topOffsets = height - frameHeight + framePaddingBottom;
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break;
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}
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frame = new Rect((int)leftOffsets, (int)topOffsets, (int)leftOffsets + frameWidth, (int)topOffsets + frameHeight);
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}
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@Override
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public void onDraw(Canvas canvas) {
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if (frame == null) {
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return;
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}
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if(scannerStart == 0 || scannerEnd == 0) {
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scannerStart = frame.top;
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scannerEnd = frame.bottom - scannerLineHeight;
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}
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int width = canvas.getWidth();
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int height = canvas.getHeight();
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// 绘制模糊区域
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drawExterior(canvas,frame,width,height);
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// 绘制扫描动画
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drawLaserScanner(canvas,frame);
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// 绘制取景区域框
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drawFrame(canvas, frame);
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// 绘制取景区域边角
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drawCorner(canvas, frame);
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//绘制提示信息
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drawTextInfo(canvas, frame);
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// 间隔更新取景区域
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postInvalidateDelayed(scannerAnimationDelay, frame.left, frame.top, frame.right, frame.bottom);
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}
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/**
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* 绘制文本
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* @param canvas
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* @param frame
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*/
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private void drawTextInfo(Canvas canvas, Rect frame) {
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if(!TextUtils.isEmpty(labelText)){
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textPaint.setColor(labelTextColor);
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textPaint.setTextSize(labelTextSize);
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textPaint.setTextAlign(Paint.Align.CENTER);
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StaticLayout staticLayout = new StaticLayout(labelText,textPaint,labelTextWidth, Layout.Alignment.ALIGN_NORMAL,1.2f,0.0f,true);
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if(labelTextLocation == TextLocation.BOTTOM){
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canvas.translate(frame.left + frame.width() / 2,frame.bottom + labelTextPadding);
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}else{
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canvas.translate(frame.left + frame.width() / 2,frame.top - labelTextPadding - staticLayout.getHeight());
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}
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staticLayout.draw(canvas);
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}
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||||
}
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||||
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||||
/**
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* 绘制边角
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* @param canvas
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* @param frame
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*/
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private void drawCorner(Canvas canvas, Rect frame) {
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paint.setColor(cornerColor);
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//左上
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canvas.drawRect(frame.left, frame.top, frame.left + cornerRectWidth, frame.top + cornerRectHeight, paint);
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canvas.drawRect(frame.left, frame.top, frame.left + cornerRectHeight, frame.top + cornerRectWidth, paint);
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//右上
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canvas.drawRect(frame.right - cornerRectWidth, frame.top, frame.right, frame.top + cornerRectHeight, paint);
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canvas.drawRect(frame.right - cornerRectHeight, frame.top, frame.right, frame.top + cornerRectWidth, paint);
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//左下
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canvas.drawRect(frame.left, frame.bottom - cornerRectWidth, frame.left + cornerRectHeight, frame.bottom, paint);
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canvas.drawRect(frame.left, frame.bottom - cornerRectHeight, frame.left + cornerRectWidth, frame.bottom, paint);
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||||
//右下
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||||
canvas.drawRect(frame.right - cornerRectWidth, frame.bottom - cornerRectHeight, frame.right, frame.bottom, paint);
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||||
canvas.drawRect(frame.right - cornerRectHeight, frame.bottom - cornerRectWidth, frame.right, frame.bottom, paint);
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||||
}
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||||
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||||
/**
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||||
* 绘制激光扫描线
|
||||
* @param canvas
|
||||
* @param frame
|
||||
*/
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||||
private void drawLaserScanner(Canvas canvas, Rect frame) {
|
||||
if(laserStyle != null){
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||||
paint.setColor(laserColor);
|
||||
switch (laserStyle){
|
||||
case LINE://线
|
||||
drawLineScanner(canvas,frame);
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break;
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||||
case GRID://网格
|
||||
drawGridScanner(canvas,frame);
|
||||
break;
|
||||
}
|
||||
paint.setShader(null);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 绘制线性式扫描
|
||||
* @param canvas
|
||||
* @param frame
|
||||
*/
|
||||
private void drawLineScanner(Canvas canvas,Rect frame){
|
||||
//线性渐变
|
||||
LinearGradient linearGradient = new LinearGradient(
|
||||
frame.left, scannerStart,
|
||||
frame.left, scannerStart + scannerLineHeight,
|
||||
shadeColor(laserColor),
|
||||
laserColor,
|
||||
Shader.TileMode.MIRROR);
|
||||
|
||||
paint.setShader(linearGradient);
|
||||
if(scannerStart <= scannerEnd) {
|
||||
//椭圆
|
||||
RectF rectF = new RectF(frame.left + 2 * scannerLineHeight, scannerStart, frame.right - 2 * scannerLineHeight, scannerStart + scannerLineHeight);
|
||||
canvas.drawOval(rectF, paint);
|
||||
scannerStart += scannerLineMoveDistance;
|
||||
} else {
|
||||
scannerStart = frame.top;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 绘制网格式扫描
|
||||
* @param canvas
|
||||
* @param frame
|
||||
*/
|
||||
private void drawGridScanner(Canvas canvas,Rect frame){
|
||||
int stroke = 2;
|
||||
paint.setStrokeWidth(stroke);
|
||||
//计算Y轴开始位置
|
||||
int startY = gridHeight > 0 && scannerStart - frame.top > gridHeight ? scannerStart - gridHeight : frame.top;
|
||||
|
||||
LinearGradient linearGradient = new LinearGradient(frame.left + frame.width()/2, startY, frame.left + frame.width()/2, scannerStart, new int[]{shadeColor(laserColor), laserColor}, new float[]{0,1f}, LinearGradient.TileMode.CLAMP);
|
||||
//给画笔设置着色器
|
||||
paint.setShader(linearGradient);
|
||||
|
||||
float wUnit = frame.width() * 1.0f/ gridColumn;
|
||||
float hUnit = wUnit;
|
||||
//遍历绘制网格纵线
|
||||
for (int i = 1; i < gridColumn; i++) {
|
||||
canvas.drawLine(frame.left + i * wUnit, startY,frame.left + i * wUnit, scannerStart,paint);
|
||||
}
|
||||
|
||||
int height = gridHeight > 0 && scannerStart - frame.top > gridHeight ? gridHeight : scannerStart - frame.top;
|
||||
|
||||
//遍历绘制网格横线
|
||||
for (int i = 0; i <= height/hUnit; i++) {
|
||||
canvas.drawLine(frame.left, scannerStart - i * hUnit,frame.right, scannerStart - i * hUnit,paint);
|
||||
}
|
||||
|
||||
if(scannerStart<scannerEnd){
|
||||
scannerStart += scannerLineMoveDistance;
|
||||
} else {
|
||||
scannerStart = frame.top;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* 处理颜色模糊
|
||||
* @param color
|
||||
* @return
|
||||
*/
|
||||
public int shadeColor(int color) {
|
||||
String hax = Integer.toHexString(color);
|
||||
String result = "01"+hax.substring(2);
|
||||
return Integer.valueOf(result, 16);
|
||||
}
|
||||
|
||||
/**
|
||||
* 绘制扫描区边框
|
||||
* @param canvas
|
||||
* @param frame
|
||||
*/
|
||||
private void drawFrame(Canvas canvas, Rect frame) {
|
||||
paint.setColor(frameColor);
|
||||
canvas.drawRect(frame.left, frame.top, frame.right, frame.top + frameLineWidth, paint);
|
||||
canvas.drawRect(frame.left, frame.top, frame.left + frameLineWidth, frame.bottom, paint);
|
||||
canvas.drawRect(frame.right - frameLineWidth, frame.top, frame.right, frame.bottom, paint);
|
||||
canvas.drawRect(frame.left, frame.bottom - frameLineWidth, frame.right, frame.bottom, paint);
|
||||
}
|
||||
|
||||
/**
|
||||
* 绘制模糊区域
|
||||
* @param canvas
|
||||
* @param frame
|
||||
* @param width
|
||||
* @param height
|
||||
*/
|
||||
private void drawExterior(Canvas canvas, Rect frame, int width, int height) {
|
||||
if(maskColor != 0){
|
||||
paint.setColor(maskColor);
|
||||
canvas.drawRect(0, 0, width, frame.top, paint);
|
||||
canvas.drawRect(0, frame.top, frame.left, frame.bottom, paint);
|
||||
canvas.drawRect(frame.right, frame.top, width, frame.bottom, paint);
|
||||
canvas.drawRect(0, frame.bottom, width, height, paint);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
public void drawViewfinder() {
|
||||
invalidate();
|
||||
}
|
||||
|
||||
public void setLaserStyle(LaserStyle laserStyle) {
|
||||
this.laserStyle = laserStyle;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user