Zxing美化

android 美化zxing二维码扫描框

2014-09-04 | 阅:  转:  |  分享 

  

<font liberation="" mono',="" consolas,="" 'courier="" new',="" 'andale="" 'lucida="" console',="" monospace;'="" style="line-height: 24px; font-size: 16px;">修改 ViewfinderView.java 类: 粉红色是修改部分
/*
 * Copyright (C) 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.Zxing.Demo.view;
import com.android.Zxing.Demo.camera.CameraManager;
import com.google.zxing.ResultPoint;
import com.android.Zxing.Demo.R;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.GradientDrawable;
import android.util.AttributeSet;
import android.view.View;
import java.util.Collection;
import java.util.HashSet;
/**
 * This view is overlaid on top of the camera preview. It adds the viewfinder rectangle and partial
 * transparency outside it, as well as the laser scanner animation and result points.
 *
 * @author [e-mail] (Daniel Switkin)
 */
public final class ViewfinderView extends View {
 private static final int[] SCANNER_ALPHA = {0, 64, 128, 192, 255, 192, 128, 64};
 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 int scannerAlpha;
 private Collection<ResultPoint> possibleResultPoints;
 private Collection<ResultPoint> lastPossibleResultPoints;
 private boolean laserLinePortrait = true;
 Rect mRect;
 int i = 0;
 GradientDrawable mDrawable;
 Paint textPaint;
 // This constructor is used when the class is built from an XML resource.
 public ViewfinderView(Context context, AttributeSet attrs) {
 super(context, attrs);
 // Initialize these once for performance rather than calling them every time in onDraw().
 paint = new Paint();
 textPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
 mRect = new Rect();
 int left = Color.parseColor("#CACACA");
 int center = Color.RED;
 int right = Color.parseColor("#CACACA");
 mDrawable = new GradientDrawable(GradientDrawable.Orientation.LEFT_RIGHT, new int[] { left, center, right });
 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);
 scannerAlpha = 0;
 possibleResultPoints = new HashSet<ResultPoint>(5);
 }
 @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 {
 paint.setColor(Color.GREEN);
 //画出四个角
 canvas.drawRect(frame.left - 10, frame.top - 10, frame.left + 20, frame.top, paint);
 canvas.drawRect(frame.left - 10, frame.top - 10, frame.left, frame.top + 20, paint);
 canvas.drawRect(frame.right - 20, frame.top - 10, frame.right + 10, frame.top, paint);
 canvas.drawRect(frame.right, frame.top - 10, frame.right + 10, frame.top + 20, paint);
 canvas.drawRect(frame.left - 10, frame.bottom + 10, frame.left + 20, frame.bottom, paint);
 canvas.drawRect(frame.left - 10, frame.bottom + 10, frame.left, frame.bottom - 20, paint);
 canvas.drawRect(frame.right - 20, frame.bottom + 10, frame.right + 10, frame.bottom, paint);
 canvas.drawRect(frame.right, frame.bottom + 10, frame.right + 10, frame.bottom - 20, paint);
 int middle = frame.width() / 2;
 textPaint.setTextSize(20);
 textPaint.setColor(Color.WHITE);
 String text = getResources().getString(R.string.dimension_content);
 canvas.drawText(text, middle - 112, frame.bottom + 60, textPaint);
 // Draw a red "laser scanner" line through the middle to show
 // decoding is active
 paint.setColor(Color.RED);
 paint.setAlpha(SCANNER_ALPHA[scannerAlpha]);
 scannerAlpha = (scannerAlpha + 1) % SCANNER_ALPHA.length;
 
 //上下走的线
 if (laserLinePortrait) {
 if ((i += 5) < frame.bottom - frame.top) {
 /*
 * canvas.drawRect(frame.left + 2, frame.top - 2 + i, frame.right - 1, frame.top + 2 + i,
 * paint);
 */
 int r = 8;
 mDrawable.setShape(GradientDrawable.RECTANGLE);
 mDrawable.setGradientType(GradientDrawable.LINEAR_GRADIENT);
 setCornerRadii(mDrawable, r, r, r, r);
 mRect.set(frame.left + 2, frame.top - 3 + i, frame.right - 1, frame.top + 3 + i);
 mDrawable.setBounds(mRect);
 mDrawable.draw(canvas);
 invalidate();
 } else {
 i = 0;
 }
 } else {
 float left = frame.left + (frame.right - frame.left) / 2 - 2;
 canvas.drawRect(left, frame.top, left + 2, frame.bottom - 2, paint);
 }
 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);
 for (ResultPoint point : currentPossible) {
 // canvas.drawCircle(frame.left + point.getX(), frame.top +
 // point.getY(), 6.0f, paint);
 /*
 * canvas.drawCircle(frame.left + point.getY(), frame.top + point.getX(), 6.0f, paint);
 */
 }
 }
 if (currentLast != null) {
 paint.setAlpha(OPAQUE / 2);
 paint.setColor(resultPointColor);
 for (ResultPoint point : currentLast) {
 /*
 * canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 3.0f, paint);
 */
 }
 }
 // Request another update at the animation interval, but only repaint the laser line,
 // not the entire viewfinder mask.
 postInvalidateDelayed(ANIMATION_DELAY, frame.left, frame.top, frame.right, frame.bottom);
 }
 }
 public void drawViewfinder() {
 resultBitmap = null;
 invalidate();
 }
  
public void setCornerRadii(GradientDrawable drawable, float r0, float r1, float r2, float r3) {
 drawable.setCornerRadii(new float[] { r0, r0, r1, r1, r2, r2, r3, r3 });
}
 /**
 * Draw a bitmap with the result points highlighted instead of the live scanning display.
 *
 * @param barcode An image of the decoded barcode.
 */
 public void drawResultBitmap(Bitmap barcode) {
 resultBitmap = barcode;
 invalidate();
 }
 public void addPossibleResultPoint(ResultPoint point) {
 possibleResultPoints.add(point);
 }
}