最近开发的项目中又涉及到二维码识别的技术，主要是做二维码扫码支付功能，我就从网上找了一个高逼格的可以自定义的三方库进行使用（使用的是博客一片枫叶_刘超，博客http://my.csdn.net/qq_23547831），首先看一下界面效果
首先你要引入三方库文件
compile 'cn.yipianfengye.android:zxing-library:2.2'
Java代码如下
case R.id.button3://定制化二维码扫描模式
intent = new Intent(MainActivity.this, SecondActivity.class);
startActivityForResult(intent, REQUEST_CODE);
break;
这里的SecondActivity就是自定义的Activity
只是比之前的CaptureActivity多了一行代码
CodeUtils.setFragmentArgs(captureFragment, R.layout.my_camera);这里的布局文件中引用了一个自定义的控件ViewFinerView，他是继承自View的
扫描二维码关注公众号，回复：
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<declare-styleable name="ViewfinderView">
<attr name="inner_width" format="dimension"/>
<attr name="inner_height" format="dimension"/>
<attr name="inner_margintop" format="dimension" />
<attr name="inner_corner_color" format="color" />
<attr name="inner_corner_length" format="dimension" />
<attr name="inner_corner_width" format="dimension" />
<attr name="inner_scan_bitmap" format="reference" />
<attr name="inner_scan_speed" format="integer" />
<attr name="inner_scan_iscircle" format="boolean" />
</declare-styleable>
从上面的图片中你看到的所有矩形（包括上下左右的黑框和扫描的四个角的八个矩形）都是通过Canvas.drawRect(left,top,right,bottom)方法绘制的
/**
* 自定义组件实现,扫描功能
*/
public final class ViewfinderView extends View {
private static final long ANIMATION_DELAY = 100L;
private static final int OPAQUE = 0xFF;
private final Paint paint;
private Bitmap resultBitmap;
private final int maskColor;
private final int resultColor;
private final int resultPointColor;
private Collection<ResultPoint> possibleResultPoints;
private Collection<ResultPoint> lastPossibleResultPoints;
// 扫描线移动的y
private int scanLineTop;
// 扫描线移动速度
private int SCAN_VELOCITY;
// 扫描线
private Bitmap scanLight;
// 是否展示小圆点
private boolean isCircle;
public ViewfinderView(Context context) {
this(context, null);
}
public ViewfinderView(Context context, AttributeSet attrs) {
this(context, attrs, -1);
}
public ViewfinderView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
paint = new Paint();
Resources resources = getResources();
maskColor = resources.getColor(R.color.viewfinder_mask);
resultColor = resources.getColor(R.color.result_view);
resultPointColor = resources.getColor(R.color.possible_result_points);
possibleResultPoints = new HashSet<>(5);
scanLight = BitmapFactory.decodeResource(resources,
R.drawable.scan_light);
initInnerRect(context, attrs);
}
/**
* 初始化内部框的大小
*
* @param context
* @param attrs
*/
private void initInnerRect(Context context, AttributeSet attrs) {
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.ViewfinderView);
// 扫描框距离顶部
float innerMarginTop = ta.getDimension(R.styleable.ViewfinderView_inner_margintop, -1);
if (innerMarginTop != -1) {
CameraManager.FRAME_MARGINTOP = (int) innerMarginTop;
}
// 扫描框的宽度
CameraManager.FRAME_WIDTH = (int) ta.getDimension(R.styleable.ViewfinderView_inner_width, DisplayUtil.screenWidthPx / 2);
// 扫描框的高度
CameraManager.FRAME_HEIGHT = (int) ta.getDimension(R.styleable.ViewfinderView_inner_height, DisplayUtil.screenWidthPx / 2);
// 扫描框边角颜色
innercornercolor = ta.getColor(R.styleable.ViewfinderView_inner_corner_color, Color.parseColor("#45DDDD"));
// 扫描框边角长度
innercornerlength = (int) ta.getDimension(R.styleable.ViewfinderView_inner_corner_length, 65);
// 扫描框边角宽度
innercornerwidth = (int) ta.getDimension(R.styleable.ViewfinderView_inner_corner_width, 15);
// 扫描bitmap
Drawable drawable = ta.getDrawable(R.styleable.ViewfinderView_inner_scan_bitmap);
if (drawable != null) {
}
// 扫描控件
scanLight = BitmapFactory.decodeResource(getResources(), ta.getResourceId(R.styleable.ViewfinderView_inner_scan_bitmap, R.drawable.scan_light));
// 扫描速度
SCAN_VELOCITY = ta.getInt(R.styleable.ViewfinderView_inner_scan_speed, 5);
isCircle = ta.getBoolean(R.styleable.ViewfinderView_inner_scan_iscircle, true);
ta.recycle();
}
@Override
public void onDraw(Canvas canvas) {
Rect frame = CameraManager.get().getFramingRect();
if (frame == null) {
return;
}
int width = canvas.getWidth();
int height = canvas.getHeight();
// Draw the exterior (i.e. outside the framing rect) darkened
paint.setColor(resultBitmap != null ? resultColor : maskColor);
canvas.drawRect(0, 0, width, frame.top, paint);
canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, paint);
canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, paint);
canvas.drawRect(0, frame.bottom + 1, width, height, paint);
if (resultBitmap != null) {
// Draw the opaque result bitmap over the scanning rectangle
paint.setAlpha(OPAQUE);
canvas.drawBitmap(resultBitmap, frame.left, frame.top, paint);
} else {
drawFrameBounds(canvas, frame);
drawScanLight(canvas, frame);
Collection<ResultPoint> currentPossible = possibleResultPoints;
Collection<ResultPoint> currentLast = lastPossibleResultPoints;
if (currentPossible.isEmpty()) {
lastPossibleResultPoints = null;
} else {
possibleResultPoints = new HashSet<ResultPoint>(5);
lastPossibleResultPoints = currentPossible;
paint.setAlpha(OPAQUE);
paint.setColor(resultPointColor);
if (isCircle) {
for (ResultPoint point : currentPossible) {
canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 6.0f, paint);
}
}
}
if (currentLast != null) {
paint.setAlpha(OPAQUE / 2);
paint.setColor(resultPointColor);
if (isCircle) {
for (ResultPoint point : currentLast) {
canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 3.0f, paint);
}
}
}
postInvalidateDelayed(ANIMATION_DELAY, frame.left, frame.top, frame.right, frame.bottom);
}
}
// 扫描框边角颜色
private int innercornercolor;
// 扫描框边角长度
private int innercornerlength;
// 扫描框边角宽度
private int innercornerwidth;
/**
* 绘制取景框边框
*
* @param canvas
* @param frame
*/
private void drawFrameBounds(Canvas canvas, Rect frame) {
/*paint.setColor(Color.WHITE);
paint.setStrokeWidth(2);
paint.setStyle(Paint.Style.STROKE);
canvas.drawRect(frame, paint);*/
paint.setColor(innercornercolor);
paint.setStyle(Paint.Style.FILL);
int corWidth = innercornerwidth;
int corLength = innercornerlength;
// 左上角
canvas.drawRect(frame.left, frame.top, frame.left + corWidth, frame.top
+ corLength, paint);
canvas.drawRect(frame.left, frame.top, frame.left
+ corLength, frame.top + corWidth, paint);
// 右上角
canvas.drawRect(frame.right - corWidth, frame.top, frame.right,
frame.top + corLength, paint);
canvas.drawRect(frame.right - corLength, frame.top,
frame.right, frame.top + corWidth, paint);
// 左下角
canvas.drawRect(frame.left, frame.bottom - corLength,
frame.left + corWidth, frame.bottom, paint);
canvas.drawRect(frame.left, frame.bottom - corWidth, frame.left
+ corLength, frame.bottom, paint);
// 右下角
canvas.drawRect(frame.right - corWidth, frame.bottom - corLength,
frame.right, frame.bottom, paint);
canvas.drawRect(frame.right - corLength, frame.bottom - corWidth,
frame.right, frame.bottom, paint);
}
/**
* 绘制移动扫描线
*
* @param canvas
* @param frame
*/
private void drawScanLight(Canvas canvas, Rect frame) {
if (scanLineTop == 0) {
scanLineTop = frame.top;
}
if (scanLineTop >= frame.bottom - 30) {
scanLineTop = frame.top;
} else {
scanLineTop += SCAN_VELOCITY;
}
Rect scanRect = new Rect(frame.left, scanLineTop, frame.right,
scanLineTop + 30);
canvas.drawBitmap(scanLight, null, scanRect, paint);
}
public void drawViewfinder() {
resultBitmap = null;
invalidate();
}
public void addPossibleResultPoint(ResultPoint point) {
possibleResultPoints.add(point);
}
/**
* 根据手机的分辨率从 dp 的单位 转成为 px(像素)
*/
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
}用户可以根据自己的需求进行适当的修改颜色和文字等内容
最后附上github地址 https://github.com/yipianfengye/android-zxingLibrary