Android仿微信二维码和条形码

本文实例为大家分享了android仿微信二维码和条形码的具体代码，供大家参考，具体内容如下

package your.qrcode.namespace;

import java.io.file;
import java.io.fileoutputstream;
import java.util.hashmap;
import java.util.map;

import com.google.zxing.barcodeformat;
import com.google.zxing.encodehinttype;
import com.google.zxing.multiformatwriter;
import com.google.zxing.writerexception;
import com.google.zxing.common.bitmatrix;
import com.google.zxing.qrcode.decoder.errorcorrectionlevel;
import android.app.activity;
import android.content.context;
import android.graphics.bitmap;
import android.graphics.bitmap.config;
import android.graphics.bitmapfactory;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.matrix;
import android.graphics.pointf;
import android.graphics.rect;
import android.graphics.drawable.bitmapdrawable;
import android.os.bundle;
import android.os.environment;
import android.util.log;
import android.view.gravity;
import android.view.view;
import android.view.view.measurespec;
import android.view.viewgroup.layoutparams;
import android.widget.button;
import android.widget.imageview;
import android.widget.linearlayout;
import android.widget.textview;

public class qrcodetextactivityactivity extends activity {
 /** called when the activity is first created. */
 button btn1 = null;
 button btn2 = null;
 imageview ivimageview = null;

 @override
 public void oncreate(bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.main);
 btn1 = (button) findviewbyid(r.id.button1);// 条形码
 btn2 = (button) findviewbyid(r.id.button2);// 二维码
 ivimageview = (imageview) findviewbyid(r.id.imageview1);
 final string strcontestring = "c2b0f58a6f09cafd1503c06ef08ac7aeb7ddb91a602dac145551c102143e6159e385cdc294";

 btn1.setonclicklistener(new view.onclicklistener() {
  public void onclick(view v) {
  bitmap mbitmap = null;
  mbitmap = creatbarcode(qrcodetextactivityactivity.this,
   strcontestring, 300, 300, true);
  if (mbitmap != null) {
   ivimageview.setimagebitmap(mbitmap);
  }
  }
 });
 btn2.setonclicklistener(new view.onclicklistener() {
  public void onclick(view v) {
  bitmap mbitmap = null;
  try {
   if (!strcontestring.equals("")) {
   mbitmap = create2dcode(strcontestring);

   // bitmap bm =
   // bitmapfactory.decoderesource(getresources(),
   // r.drawable.diagnose1);
   ivimageview.setimagebitmap(createbitmap(
    mbitmap,
    zoombitmap(bitmapfactory.decoderesource(
     getresources(), r.drawable.cccc), 100,100)));
   }
  } catch (exception e) {
   e.printstacktrace();
  }
  }
 });
 }

 public bitmap create2dcode(string str) throws writerexception {
 map<encodehinttype, object> hints = new hashmap<encodehinttype, object>();
 hints.put(encodehinttype.error_correction, errorcorrectionlevel.l);
 hints.put(encodehinttype.character_set, "gbk");
 // hints.put(encodehinttype.character_set, "utf-8");
 // 生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
 bitmatrix matrix = new multiformatwriter().encode(str,
  barcodeformat.qr_code, 500, 500, hints);
 int width = matrix.getwidth();
 int height = matrix.getheight();
 // 二维矩阵转为一维像素数组,也就是一直横着排了
 int[] pixels = new int[width * height];
 for (int i = 0; i < pixels.length; i++) {
  pixels[i] = 0xffffffff;
 }
 for (int y = 0; y < height; y++) {
  for (int x = 0; x < width; x++) {
  if (matrix.get(x, y)) {
   pixels[y * width + x] = 0xff000000;
  }
  }
 }
 bitmap bitmap = bitmap.createbitmap(width, height,
  bitmap.config.argb_8888);
 // 通过像素数组生成bitmap,具体参考api
 bitmap.setpixels(pixels, 0, width, 0, 0, width, height);
 return bitmap;
 }

 public file getcodepath(string name) {
 string extern_path = null;
 if (environment.getexternalstoragestate().equals(
  environment.media_mounted) == true) {
  extern_path = android.os.environment.getexternalstoragedirectory()
   .getabsolutepath() + "/";
  file f = new file(extern_path);
  if (!f.exists()) {
  f.mkdirs();
  }
 }
 return new file(extern_path + name);
 }

 /**
 * 图片两端所保留的空白的宽度
 */
 private int marginw = 20;
 /**
 * 条形码的编码类型
 */
 private barcodeformat barcodeformat = barcodeformat.code_128;

 /**
 * 生成条形码
 * 
 * @param context
 * @param contents
 *      需要生成的内容
 * @param desiredwidth
 *      生成条形码的宽带
 * @param desiredheight
 *      生成条形码的高度
 * @param displaycode
 *      是否在条形码下方显示内容
 * @return
 */
 public bitmap creatbarcode(context context, string contents,
  int desiredwidth, int desiredheight, boolean displaycode) {
 bitmap ruseltbitmap = null;
 if (displaycode) {
  bitmap barcodebitmap = encodeasbitmap(contents, barcodeformat,
   desiredwidth, desiredheight);
  bitmap codebitmap = creatcodebitmap(contents, desiredwidth + 2
   * marginw, desiredheight, context);
  ruseltbitmap = mixturebitmap(barcodebitmap, codebitmap, new pointf(
   0, desiredheight));
 } else {
  ruseltbitmap = encodeasbitmap(contents, barcodeformat,
   desiredwidth, desiredheight);
 }

 return ruseltbitmap;
 }

 /**
 * 生成显示编码的bitmap
 * 
 * @param contents
 * @param width
 * @param height
 * @param context
 * @return
 */
 protected bitmap creatcodebitmap(string contents, int width, int height,
  context context) {
 textview tv = new textview(context);
 linearlayout.layoutparams layoutparams = new linearlayout.layoutparams(
  layoutparams.fill_parent, layoutparams.wrap_content);
 tv.setlayoutparams(layoutparams);
 tv.settext(contents);
 tv.setheight(height);
 tv.setgravity(gravity.center_horizontal);
 tv.setwidth(width);
 tv.setdrawingcacheenabled(true);
 tv.settextcolor(color.black);
 tv.measure(measurespec.makemeasurespec(0, measurespec.unspecified),
  measurespec.makemeasurespec(0, measurespec.unspecified));
 tv.layout(0, 0, tv.getmeasuredwidth(), tv.getmeasuredheight());

 tv.builddrawingcache();
 bitmap bitmapcode = tv.getdrawingcache();
 return bitmapcode;
 }

 /**
 * 生成条形码的bitmap
 * 
 * @param contents
 *      需要生成的内容
 * @param format
 *      编码格式
 * @param desiredwidth
 * @param desiredheight
 * @return
 * @throws writerexception
 */
 protected bitmap encodeasbitmap(string contents, barcodeformat format,
  int desiredwidth, int desiredheight) {
 final int white = 0xffffffff;
 final int black = 0xff000000;

 multiformatwriter writer = new multiformatwriter();
 bitmatrix result = null;
 try {
  result = writer.encode(contents, format, desiredwidth,
   desiredheight, null);
 } catch (writerexception e) {
  // todo auto-generated catch block
  e.printstacktrace();
 }

 int width = result.getwidth();
 int height = result.getheight();
 int[] pixels = new int[width * height];
 // all are 0, or black, by default
 for (int y = 0; y < height; y++) {
  int offset = y * width;
  for (int x = 0; x < width; x++) {
  pixels[offset + x] = result.get(x, y) ? black : white;
  }
 }

 bitmap bitmap = bitmap.createbitmap(width, height,
  bitmap.config.argb_8888);
 bitmap.setpixels(pixels, 0, width, 0, 0, width, height);
 return bitmap;
 }

 /**
 * 将两个bitmap合并成一个
 * 
 * @param first
 * @param second
 * @param frompoint
 *      第二个bitmap开始绘制的起始位置（相对于第一个bitmap）
 * @return
 */
 protected bitmap mixturebitmap(bitmap first, bitmap second, pointf frompoint) {
 if (first == null || second == null || frompoint == null) {
  return null;
 }
 bitmap newbitmap = bitmap.createbitmap(
  first.getwidth() + second.getwidth() + marginw,
  first.getheight() + second.getheight(), config.argb_4444);
 canvas cv = new canvas(newbitmap);
 cv.drawbitmap(first, marginw, 0, null);
 cv.drawbitmap(second, frompoint.x, frompoint.y, null);
 cv.save(canvas.all_save_flag);
 cv.restore();

 return newbitmap;
 }

 /*** 仿微信二维码开始 ***/
 // 图片剪切
 public bitmap cutbitmap(bitmap mbitmap, rect r, bitmap.config config) {
 int width = r.width();
 int height = r.height();
 bitmap croppedimage = bitmap.createbitmap(width, height, config);
 canvas cvs = new canvas(croppedimage);
 rect dr = new rect(0, 0, width, height);
 cvs.drawbitmap(mbitmap, r, dr, null);
 return croppedimage;
 }

 /***
 * 合并图片
 * 
 * @param src
 * @param watermark
 * @return
 */
 private bitmap createbitmap(bitmap src, bitmap watermark) {
 string tag = "createbitmap";
 log.d(tag, "create a new bitmap");
 if (src == null) {
  return null;
 }
 int w = src.getwidth();
 int h = src.getheight();
 int ww = watermark.getwidth();
 int wh = watermark.getheight();
 // create the new blank bitmap
 bitmap newb = bitmap.createbitmap(w, h, config.argb_8888);// 创建一个新的和src长度宽度一样的位图
 canvas cv = new canvas(newb);

 // draw src into
 cv.drawbitmap(src, 0, 0, null);// 在 0，0坐标开始画入src

 // 在src的中间画watermark
 cv.drawbitmap(watermark, w / 2 - ww / 2, h / 2 - wh / 2, null);// 设置ic_launcher的位置

 // save all clip
 cv.save(canvas.all_save_flag);// 保存
 // store
 cv.restore();// 存储
 return newb;
 }

 /***
 * 缩放图片
 * 
 * @param src
 * @param destwidth
 * @param destheigth
 * @return
 */
 private bitmap zoombitmap(bitmap src, int destwidth, int destheigth) {
 string tag = "lessenbitmap";
 if (src == null) {
  return null;
 }
 int w = src.getwidth();// 源文件的大小
 int h = src.getheight();
 // calculate the scale - in this case = 0.4f
 float scalewidth = ((float) destwidth) / w;// 宽度缩小比例
 float scaleheight = ((float) destheigth) / h;// 高度缩小比例
 log.d(tag, "bitmap width is :" + w);
 log.d(tag, "bitmap height is :" + h);
 log.d(tag, "new width is :" + destwidth);
 log.d(tag, "new height is :" + destheigth);
 log.d(tag, "scale width is :" + scalewidth);
 log.d(tag, "scale height is :" + scaleheight);
 matrix m = new matrix();// 矩阵
 m.postscale(scalewidth, scaleheight);// 设置矩阵比例
 bitmap resizedbitmap = bitmap.createbitmap(src, 0, 0, w, h, m, true);// 直接按照矩阵的比例把源文件画入进行
 return resizedbitmap;
 }

}

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical" android:background="#ffffff">

  <textview
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello" />

  <button
    android:id="@+id/button1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="条形码" />


  <button
    android:id="@+id/button2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="二维码" />


  <relativelayout
    android:layout_width="match_parent"
    android:layout_height="match_parent" >


    <imageview
      android:id="@+id/imageview1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerhorizontal="true"
      android:layout_centervertical="true"
      android:scaletype="fitxy"
      android:src="@drawable/ic_launcher" />

  </relativelayout>

</linearlayout>

图片美工做下处理。貌似需要做一个描边。png透明背景 

在加两个方法

/***
 * 缩放图片并加描边
 * 
 * @param src
 * @param destwidth
 * @param destheigth
 * @return
 */
 private bitmap zoombitmapborder(bitmap src, int destwidth, int destheigth) {
 string tag = "lessenbitmap";
 if (src == null) {
  return null;
 }
 int w = src.getwidth();// 源文件的大小
 int h = src.getheight();
 // calculate the scale - in this case = 0.4f
 float scalewidth = ((float) destwidth - 4) / w;// 宽度缩小比例
 float scaleheight = ((float) destheigth - 4) / h;// 高度缩小比例
 log.d(tag, "bitmap width is :" + w);
 log.d(tag, "bitmap height is :" + h);
 log.d(tag, "new width is :" + destwidth);
 log.d(tag, "new height is :" + destheigth);
 log.d(tag, "scale width is :" + scalewidth);
 log.d(tag, "scale height is :" + scaleheight);
 matrix m = new matrix();// 矩阵
 m.postscale(scalewidth, scaleheight);// 设置矩阵比例
 bitmap resizedbitmap = bitmap.createbitmap(src, 0, 0, w, h, m, true);// 直接按照矩阵的比例把源文件画入进行

 bitmap newb = bitmap.createbitmap(destwidth, destheigth,
  config.argb_8888);// 创建一个新的和src长度宽度一样的位图
 canvas cv = new canvas(newb);
 //cv.drawcolor(r.color.white);
cv.drawrgb(0,128,128);
 cv.drawbitmap(resizedbitmap, 2, 2, null);// 设置ic_launcher的位置

 // save all clip
 cv.save(canvas.all_save_flag);// 保存
 // store
 cv.restore();// 存储

 return getroundedcornerbitmap(newb);
 }

 /**
 * 图片圆角
 * @param bitmap
 * @return
 */
 public static bitmap getroundedcornerbitmap(bitmap bitmap) {
 bitmap output = bitmap.createbitmap(bitmap.getwidth(),
  bitmap.getheight(), config.argb_8888);
 canvas canvas = new canvas(output);
 final int color = 0xff424242;
 final paint paint = new paint();
 final rect rect = new rect(0, 0, bitmap.getwidth(), bitmap.getheight());
 final rectf rectf = new rectf(rect);
 final float roundpx = 12;
 paint.setantialias(true);
 canvas.drawargb(0, 0, 0, 0);
 paint.setcolor(color);
 canvas.drawroundrect(rectf, roundpx, roundpx, paint);
 paint.setxfermode(new porterduffxfermode(mode.src_in));
 canvas.drawbitmap(bitmap, rect, rect, paint);
 return output;

 }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。