Android之二维码生成实现

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#f0f0f0"
android:orientation="vertical">

<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="49dp"
android:background="#ffffff">

<ImageView
android:id="@+id/imgfh"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:padding="5dp"
android:src="@drawable/farm_nav_fanhui" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="优惠券"
android:textColor="#333333"
android:textSize="18dp" />

</RelativeLayout>

<View
android:layout_width="fill_parent"
android:layout_height="0.5dp"
android:background="#d9dad7" />

<View
android:layout_width="fill_parent"
android:layout_height="9dp"
android:background="#f0f0f0" />

<View
android:layout_width="fill_parent"
android:layout_height="0.5dp"
android:background="#e6e6e6" />

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="49dp"
android:background="#ffffff">

<ImageView
android:id="@+id/juan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="12dp"
android:src="@drawable/haojuan_saoma_icon" />

<TextView
android:id="@+id/titlezhe"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="5dp"
android:layout_toRightOf="@+id/juan"
android:text="七天连锁酒店7.5折优惠券"
android:textColor="#262626"
android:textSize="16dp" />
</RelativeLayout>

<View
android:layout_width="fill_parent"
android:layout_height="0.5dp"
android:background="#e6e6e6" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="36dp"
android:background="#ffffff"
android:orientation="horizontal">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="12dp"
android:text="有效期："
android:textColor="#808080"
android:textSize="14dp" />

<TextView
android:id="@+id/yxtime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="2016.12.30-2017.1.16"
android:textColor="#808080"
android:textSize="14dp" />
</LinearLayout>

<View
android:layout_width="fill_parent"
android:layout_height="0.5dp"
android:background="#e6e6e6" />

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="228dp"
android:background="#ffffff">

<RelativeLayout
android:id="@+id/relativeLayout1"
android:layout_width="165dp"
android:layout_height="165dp"
android:layout_centerHorizontal="true"
android:layout_marginTop="22dp"
android:background="@drawable/sjzsewm">

<ImageView
android:id="@+id/img"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true" />

</RelativeLayout>

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/relativeLayout1"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:text="向商家出示扫码即可消费"
android:textColor="#343434"
android:textSize="14dp" />

</RelativeLayout>

<View
android:layout_width="fill_parent"
android:layout_height="0.5dp"
android:background="#e6e6e6" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">

<!-- 背景颜色 -->
<solid android:color="#ffffff" />

<!-- 控制边界线颜色和大小 -->
<stroke
android:width="1dp"
android:color="#e6e6e6" />

<!-- 控制圆角大小 -->
<corners android:radius="4dp" />

</shape>

package com.zjtd.bzcommunity.activity;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.os.Environment;
import android.view.Gravity;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.zjtd.bzcommunity.R;

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Calendar;
import java.util.Date;

/**
* Created by Administrator on 2017/1/16.
* 优惠券扫描
*/
public class YhqsmActivity extends Activity implements View.OnClickListener {

private ImageView imgfh;//返回键
private TextView titlezhe;//title和打折类型
private TextView yxtime;//有效期
private ImageView result = null;//二维码
private Bitmap bmp = null;//bitmap
private String content;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.yhqsm_layout);
initlayout();
}

/**
* 实例化
*/
private void initlayout() {
imgfh = (ImageView) findViewById(R.id.imgfh);
titlezhe = (TextView) findViewById(R.id.titlezhe);
yxtime = (TextView) findViewById(R.id.yxtime);
result = (ImageView) findViewById(R.id.img);
imgfh.setOnClickListener(this);
content = "你来打我呀！";
try {
bmp = createBitmap(Create2DCode(content));
} catch (WriterException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
result.setImageBitmap(bmp);
ByteArrayOutputStream baos1 = new ByteArrayOutputStream();

bmp.compress(Bitmap.CompressFormat.PNG, 100, baos1);

try {
Writetemp(baos1.toByteArray());
} catch (IOException e) {
e.printStackTrace();
}
}

@Override
public void onClick(View v) {
switch (v.getId()) {
//返回键
case R.id.imgfh:
finish();
break;
}
}

public Bitmap Create2DCode(String str) throws WriterException,
UnsupportedEncodingException {

BitMatrix matrix = new MultiFormatWriter().encode(
new String(str.getBytes("GBK"), "ISO-8859-1"),
BarcodeFormat.QR_CODE, 300, 300);

int width = matrix.getWidth();
int height = matrix.getHeight();
int[] pixels = new int[width * height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (matrix.get(x, y)) {
pixels[y * width + x] = 0xff000000;
}

}
}
int[] colors = {R.color.white};
Bitmap bitmap = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}

public void Write(byte[] b) throws IOException {
File cacheFile = null;
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
File sdCardDir = Environment.getExternalStorageDirectory();

long time = Calendar.getInstance().getTimeInMillis();
String fileName = time + ".png";
File dir = new File(sdCardDir.getCanonicalPath() + "/zibuyu/");
if (!dir.exists()) {
dir.mkdirs();
}
cacheFile = new File(dir, fileName);

}
Toast toast = Toast.makeText(getApplicationContext(), "哈哈哈哈",
Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
LinearLayout toastView = (LinearLayout) toast.getView();
ImageView imageCodeProject = new ImageView(getApplicationContext());
toastView.addView(imageCodeProject, 0);
toast.show();
BufferedOutputStream bos = null;
try {
bos = new BufferedOutputStream(new FileOutputStream(cacheFile));
bos.write(b, 0, b.length);
bos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

public void Writetemp(byte[] b) throws IOException {
File cacheFile = null;
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
File sdCardDir = Environment.getExternalStorageDirectory();
Date curDate = new Date(System.currentTimeMillis());
String fileName = "temp.jpg";
File dir = new File(sdCardDir.getCanonicalPath() + "/zibuyu/temp");
if (!dir.exists()) {
dir.mkdirs();
}
cacheFile = new File(dir, fileName);

}
BufferedOutputStream bos = null;
try {
bos = new BufferedOutputStream(new FileOutputStream(cacheFile));

bos.write(b, 0, b.length);
bos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

private Bitmap createBitmap(Bitmap src) {
if (src == null) {
return null;
}
Paint paint = new Paint();
paint.setColor(Color.WHITE);
paint.setAntiAlias(true);

int w = 300;
int h = 300;
Bitmap newb = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
Canvas cv = new Canvas(newb);

cv.drawColor(Color.WHITE);

cv.drawBitmap(src, 0, 0, null);
cv.save(Canvas.ALL_SAVE_FLAG);
cv.restore();
return newb;

}
}