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;

}

来源：http://blog.csdn.net/fuweiping/article/details/8115619