android zbar二维码扫描(中文不乱码)
感谢大神总结的zbar文章：android利用zbar二维码扫描-(解决中文乱码及扫描区域定义)
还有大神的工程：android_zbar二维码扫描
前段时间用zxing做的二维码扫描，中间遇到一个头疼的问题的时候，ios同事说我用的zbar，当时只是查了查android也有，今天有时间看了看zbar
zbar跟zxing的比较:
1、扫描速度来说zbar貌似略胜一筹（没有进行过多的测试，下结论有点早）
2、集成时间来讲zbar也更快一些，除了jar，几个so库，java文件只有一个
3、zbar没有生成二维码功能
如果只做二维码扫描，zbar更简单省事儿一些
开头提到了笔者是通过上面大神的文章才开始了解zbar
zbar只有一个java文件，Viewfinder.java
看了代码之后感觉边框通过图片来加载有点死板，.9图片也可以 对于边框和四个角笔者更倾向于直接画出来，想zxing那样
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
/**
* 查找框
*
* @author niexiaoqiang
*/
public class FinderView extends View {
private static final long ANIMATION_DELAY = 100L;
private Paint finderMaskPaint;
private int measureedWidth;
private int measureedHeight;
/**
* 手机的屏幕密度
*/
private static float density;
/**
* 四个绿色边角对应的长度
*/
private int ScreenRate;
/**
* 四个绿色边角对应的宽度
*/
private static final int CORNER_WIDTH = 5;
/**
* 边框颜色
*/
private int middleRectColor;
private int maskColor;
public FinderView(Context context) {
super(context);
init(context);
}
public FinderView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// canvas.drawRect(leftRect, finderMaskPaint);
// canvas.drawRect(topRect, finderMaskPaint);
// canvas.drawRect(rightRect, finderMaskPaint);
// canvas.drawRect(bottomRect, finderMaskPaint);
// 画框(此方法是通过图片画出 看起来比较死板,在此参照zxing画边方法)
// zx_code_kuang.setBounds(middleRect);
// zx_code_kuang.draw(canvas);
// 获取屏幕的宽和高
int width = canvas.getWidth();
int height = canvas.getHeight();
// 画出扫描框外面的阴影部分，共四个部分，扫描框的上面到屏幕上面，扫描框的下面到屏幕下面
// 扫描框的左边面到屏幕左边，扫描框的右边到屏幕右边
// Draw the exterior (i.e. outside the framing rect) darkened
finderMaskPaint.setColor(maskColor);
canvas.drawRect(0, 0, width, middleRect.top, finderMaskPaint);
canvas.drawRect(0, middleRect.top, middleRect.left, middleRect.bottom + 1, finderMaskPaint);
canvas.drawRect(middleRect.right + 1, middleRect.top, width, middleRect.bottom + 1,
finderMaskPaint);
canvas.drawRect(0, middleRect.bottom + 1, width, height, finderMaskPaint);
/*
* zxing 画扫描框边上的角，总共8个部分
*/
finderMaskPaint.setColor(Color.GREEN);
canvas.drawRect(middleRect.left, middleRect.top, middleRect.left
+ ScreenRate, middleRect.top + CORNER_WIDTH, finderMaskPaint);
canvas.drawRect(middleRect.left, middleRect.top, middleRect.left
+ CORNER_WIDTH, middleRect.top + ScreenRate, finderMaskPaint);
canvas.drawRect(middleRect.right - ScreenRate, middleRect.top,
middleRect.right, middleRect.top + CORNER_WIDTH,
finderMaskPaint);
canvas.drawRect(middleRect.right - CORNER_WIDTH, middleRect.top,
middleRect.right, middleRect.top + ScreenRate, finderMaskPaint);
canvas.drawRect(middleRect.left, middleRect.bottom - CORNER_WIDTH,
middleRect.left + ScreenRate, middleRect.bottom,
finderMaskPaint);
canvas.drawRect(middleRect.left, middleRect.bottom - ScreenRate,
middleRect.left + CORNER_WIDTH, middleRect.bottom,
finderMaskPaint);
canvas.drawRect(middleRect.right - ScreenRate, middleRect.bottom
- CORNER_WIDTH, middleRect.right, middleRect.bottom,
finderMaskPaint);
canvas.drawRect(middleRect.right - CORNER_WIDTH, middleRect.bottom
- ScreenRate, middleRect.right, middleRect.bottom,
finderMaskPaint);
if (lineRect.bottom < middleRect.bottom) {
zx_code_line.setBounds(lineRect);
lineRect.top = lineRect.top + lineHeight / 2;
lineRect.bottom = lineRect.bottom + lineHeight / 2;
} else {
lineRect.set(middleRect);
lineRect.bottom = lineRect.top + lineHeight;
zx_code_line.setBounds(lineRect);
}
zx_code_line.draw(canvas);
postInvalidateDelayed(ANIMATION_DELAY, middleRect.left, middleRect.top,
middleRect.right, middleRect.bottom);
}
private Rect topRect = new Rect();
private Rect bottomRect = new Rect();
private Rect rightRect = new Rect();
private Rect leftRect = new Rect();
private Rect middleRect = new Rect();
private Rect lineRect = new Rect();
private Drawable zx_code_kuang;
private Drawable zx_code_line;
private int lineHeight;
private void init(Context context) {
int finder_mask = context.getResources().getColor(R.color.finder_mask);
finderMaskPaint = new Paint();
finderMaskPaint.setColor(finder_mask);
zx_code_kuang = context.getResources().getDrawable(
R.drawable.zx_code_kuang);
zx_code_line = context.getResources().getDrawable(
R.drawable.zx_code_line);
lineHeight = 30;
// 获取屏幕密度
density = context.getResources().getDisplayMetrics().density;
// 计算当前屏幕密度下边框的厚度
ScreenRate = (int) (15 * density);
// 获取边框颜色资源
middleRectColor = context.getResources().getColor(
R.color.viewfinder_frame);
maskColor = context.getResources().getColor(R.color.viewfinder_mask);
}
// ////////////新增该方法//////////////////////
/**
* 根据图片size求出矩形框在图片所在位置，tip：相机旋转90度以后，拍摄的图片是横着的，所有传递参数时，做了交换
*
* @param w
* @param h
* @return
*/
public Rect getScanImageRect(int w, int h) {
// 先求出实际矩形
Rect rect = new Rect();
rect.left = middleRect.left;
rect.right = middleRect.right;
float temp = h / (float) measureedHeight;
rect.top = (int) (middleRect.top * temp);
rect.bottom = (int) (middleRect.bottom * temp);
return rect;
}
// //////////////////////////////////
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
measureedWidth = MeasureSpec.getSize(widthMeasureSpec);
measureedHeight = MeasureSpec.getSize(heightMeasureSpec);
int borderWidth = measureedWidth / 2 + 100;
middleRect.set((measureedWidth - borderWidth) / 2,
(measureedHeight - borderWidth) / 2,
(measureedWidth - borderWidth) / 2 + borderWidth,
(measureedHeight - borderWidth) / 2 + borderWidth);
lineRect.set(middleRect);
lineRect.bottom = lineRect.top + lineHeight;
leftRect.set(0, middleRect.top, middleRect.left, middleRect.bottom);
topRect.set(0, 0, measureedWidth, middleRect.top);
rightRect.set(middleRect.right, middleRect.top, measureedWidth,
middleRect.bottom);
bottomRect.set(0, middleRect.bottom, measureedWidth, measureedHeight);
}
}