android zbar二维码扫描(中文不乱码)，12道Android高级面试题_zbar扫码速度测试

zbar跟zxing的比较:

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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

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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);