感謝大神總結的zbar文章：android利用zbar二維碼掃描-(解決中文亂碼及掃描區域定義)
還有大神的工程：android_zbar二維碼掃描
前段時間用zxing做的二維碼掃描，中間遇到一個頭疼的問題的時候，ios同事說我用的zbar，當時只是查了查android也有，今天有時間看了看zbar
zbar跟zxing的比較:
1、掃描速度來說zbar貌似略勝一籌（沒有進行過多的測試，下結論有點早）
2、集成時間來講zbar也更快一些，除了jar，幾個so庫，java文件只有一個
3、zbar沒有生成二維碼功能
如果只做二維碼掃描，zbar更簡單省事兒一些
開頭提到了筆者是通過上面大神的文章纔開始瞭解zbar
zbar只有一個java文件，Viewfinder.java
看了代碼之後感覺邊框通過圖片來加載有點死板，.9圖片也可以 對於邊框和四個角筆者更傾向於直接畫出來，想zxing那樣
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;
/**
* 手機的屏幕密度
*/
private static float density;
/**
* 四個綠色邊角對應的長度
*/
private int ScreenRate;
/**
* 四個綠色邊角對應的寬度
*/
private static final int CORNER_WIDTH = 5;
/**
* 邊框顏色
*/
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);
// 畫框(此方法是通過圖片畫出 看起來比較死板,在此參照zxing畫邊方法)
// zx_code_kuang.setBounds(middleRect);
// zx_code_kuang.draw(canvas);
// 獲取屏幕的寬和高
int width = canvas.getWidth();
int height = canvas.getHeight();
// 畫出掃描框外面的陰影部分，共四個部分，掃描框的上面到屏幕上面，掃描框的下面到屏幕下面
// 掃描框的左邊面到屏幕左邊，掃描框的右邊到屏幕右邊
// 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 畫掃描框邊上的角，總共8個部分
*/
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;
// 獲取屏幕密度
density = context.getResources().getDisplayMetrics().density;
// 計算當前屏幕密度下邊框的厚度
ScreenRate = (int) (15 * density);
// 獲取邊框顏色資源
middleRectColor = context.getResources().getColor(
R.color.viewfinder_frame);
maskColor = context.getResources().getColor(R.color.viewfinder_mask);
}
// ////////////新增該方法//////////////////////
/**
* 根據圖片size求出矩形框在圖片所在位置，tip：相機旋轉90度以後，拍攝的圖片是橫着的，所有傳遞參數時，做了交換
*
* @param w
* @param h
* @return
*/
public Rect getScanImageRect(int w, int h) {
// 先求出實際矩形
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);
}
}
