最近又在倒腾二维码，发现网上的教程都不够用，所以把之前整合的二维码Demo有拿出来重新添加些功能，这里也算是重新学习吧！
当然对于二维码，相信大家都很熟悉了。这里就不多说。本项目是基于Zxing的开源项目开发的。
这里用的Demo是之前网上搜的教程。时间久了，也就忘了，大家网上应该可以搜到，当然如果不想那么麻烦，可以下载我的这个Demo，用的时候直接用就行了。这里我新添加了一些功能。
好吧不说废话了，进入主题：
首先写好布局文件：
<?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:background="@android:color/white"
android:orientation="vertical" >
<Button
android:id="@+id/bt_bigin_scan"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:text="开始扫描" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="二维码信息："
android:textColor="@android:color/black"
android:textSize="18sp" />
<EditText
android:id="@+id/scan_result"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@android:color/black"
android:textSize="18sp" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:onClick="checkResult"
android:text="进入网页" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:onClick="Create2QR"
android:text="生成二维码" />
<ImageView
android:id="@+id/iv_qr_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
/>
</LinearLayout>package com.androidzhang.zxingframe;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import com.google.zxing.WriterException;
import com.zxing.activity.CaptureActivity;
public class ZxingFrame extends Activity {
private EditText resultTextView;
private Button scanBarCodeButton;
private ImageView iv_qr_image;
protected int mScreenWidth ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_zxing_frame);
resultTextView = (EditText) this.findViewById(R.id.scan_result);
scanBarCodeButton = (Button) this.findViewById(R.id.bt_bigin_scan);
iv_qr_image = (ImageView)findViewById(R.id.iv_qr_image);
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
mScreenWidth = dm.widthPixels;
scanBarCodeButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// 调用ZXIng开源项目源码 扫描二维码
Intent openCameraIntent = new Intent(ZxingFrame.this,
CaptureActivity.class);
startActivityForResult(openCameraIntent, 0);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// 取得返回信息
if (resultCode == RESULT_OK) {
Bundle bundle = data.getExtras();
String scanResult = bundle.getString("result");
resultTextView.setText(scanResult);
}
}
//调用浏览器打开，功能尚未完善、、、
public void checkResult(View v){
String result = resultTextView.getText().toString();
// Intent intent = new Intent(ZxingFrame.this,
// CheckResult.class);
// intent.putExtra("result", result);
// startActivity(intent);
Intent i= new Intent();
i.setAction("android.intent.action.VIEW");
Uri content_url = Uri.parse(result);
i.setData(content_url);
i.setClassName("com.android.browser","com.android.browser.BrowserActivity");
startActivity(i);}
//生成二维码
public void Create2QR(View v){
String uri = resultTextView.getText().toString();
// Bitmap bitmap = BitmapUtil.create2DCoderBitmap(uri, mScreenWidth/2, mScreenWidth/2);
Bitmap bitmap;
try {
bitmap = BitmapUtil.createQRCode(uri, mScreenWidth);
if(bitmap != null){
iv_qr_image.setImageBitmap(bitmap);
}
} catch (WriterException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
接着就是处理了：都在CaptureActivity
这里扫描二维码需要用到的结果：
/**
* Handler scan result
*
* @param result
* @param barcode
* 获取结果
*/
public void handleDecode(Result result, Bitmap barcode) {
inactivityTimer.onActivity();
playBeepSoundAndVibrate();
String resultString = result.getText();
// FIXME
if (resultString.equals("")) {
Toast.makeText(CaptureActivity.this, "扫描失败!", Toast.LENGTH_SHORT)
.show();
} else {
// System.out.println("Result:"+resultString);
Intent resultIntent = new Intent();
Bundle bundle = new Bundle();
bundle.putString("result", resultString);
resultIntent.putExtras(bundle);
this.setResult(RESULT_OK, resultIntent);
}
CaptureActivity.this.finish();
}// 是否开启闪光灯
public void IfOpenLight(View v) {
ifOpenLight++;
switch (ifOpenLight % 2) {
case 0:
// 关闭
CameraManager.get().closeLight();
break;
case 1:
// 打开
CameraManager.get().openLight(); // 开闪光灯
break;
default:
break;
}
}/*
* 获取带二维码的相片进行扫描
*/
public void pickPictureFromAblum(View v) {
// 打开手机中的相册
Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT); // "android.intent.action.GET_CONTENT"
innerIntent.setType("image/*");
Intent wrapperIntent = Intent.createChooser(innerIntent, "选择二维码图片");
this.startActivityForResult(wrapperIntent, 1);
}
String photo_path;
ProgressDialog mProgress;
Bitmap scanBitmap;
/*
* (non-Javadoc)
*
* @see android.app.Activity#onActivityResult(int, int,
* android.content.Intent) 对相册获取的结果进行分析
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if (resultCode == RESULT_OK) {
switch (requestCode) {
case 1:
// 获取选中图片的路径
Cursor cursor = getContentResolver().query(data.getData(),
null, null, null, null);
if (cursor.moveToFirst()) {
photo_path = cursor.getString(cursor
.getColumnIndex(MediaStore.Images.Media.DATA));
Log.i("路径", photo_path);
}
cursor.close();
mProgress = new ProgressDialog(CaptureActivity.this);
mProgress.setMessage("正在扫描...");
mProgress.setCancelable(false);
mProgress.show();
new Thread(new Runnable() {
@Override
public void run() {
Result result = scanningImage(photo_path);
if (result != null) {
Message m = mHandler.obtainMessage();
m.what = 1;
m.obj = result.getText();
mHandler.sendMessage(m);
} else {
Message m = mHandler.obtainMessage();
m.what = 2;
m.obj = "Scan failed!";
mHandler.sendMessage(m);
}
}
}).start();
break;
default:
break;
}
}
super.onActivityResult(requestCode, resultCode, data);
}
final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
switch (msg.what) {
case 1:
mProgress.dismiss();
String resultString = msg.obj.toString();
if (resultString.equals("")) {
Toast.makeText(CaptureActivity.this, "扫描失败!",
Toast.LENGTH_SHORT).show();
} else {
// System.out.println("Result:"+resultString);
Intent resultIntent = new Intent();
Bundle bundle = new Bundle();
bundle.putString("result", resultString);
resultIntent.putExtras(bundle);
CaptureActivity.this.setResult(RESULT_OK, resultIntent);
}
CaptureActivity.this.finish();
break;
case 2:
mProgress.dismiss();
Toast.makeText(CaptureActivity.this, "解析错误！", Toast.LENGTH_LONG)
.show();
break;
default:
break;
}
super.handleMessage(msg);
}
};
/**
* 扫描二维码图片的方法
*
* 目前识别度不高，有待改进
*
* @param path
* @return
*/
public Result scanningImage(String path) {
if (TextUtils.isEmpty(path)) {
return null;
}
Hashtable<DecodeHintType, String> hints = new Hashtable<DecodeHintType, String>();
hints.put(DecodeHintType.CHARACTER_SET, "UTF8"); // 设置二维码内容的编码
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true; // 先获取原大小
scanBitmap = BitmapFactory.decodeFile(path, options);
options.inJustDecodeBounds = false; // 获取新的大小
int sampleSize = (int) (options.outHeight / (float) 100);
if (sampleSize <= 0)
sampleSize = 1;
options.inSampleSize = sampleSize;
scanBitmap = BitmapFactory.decodeFile(path, options);
RGBLuminanceSource source = new RGBLuminanceSource(scanBitmap);
BinaryBitmap bitmap1 = new BinaryBitmap(new HybridBinarizer(source));
QRCodeReader reader = new QRCodeReader();
try {
return reader.decode(bitmap1, hints);
} catch (NotFoundException e) {
e.printStackTrace();
} catch (ChecksumException e) {
e.printStackTrace();
} catch (FormatException e) {
e.printStackTrace();
}
return null;
}package com.androidzhang.zxingframe;
import java.util.Hashtable;
import android.graphics.Bitmap;
import android.util.Log;
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.QRCodeWriter;
public class BitmapUtil {
/**
* 生成一个二维码图像
*
* @param url
* 传入的字符串，通常是一个URL
* @param QR_WIDTH
* 宽度（像素值px）
* @param QR_HEIGHT
* 高度（像素值px）
* @return
*/
public static final Bitmap create2DCoderBitmap(String url, int QR_WIDTH,
int QR_HEIGHT) {
try {
// 判断URL合法性
if (url == null || "".equals(url) || url.length() < 1) {
return null;
}
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
// 图像数据转换，使用了矩阵转换
BitMatrix bitMatrix = new QRCodeWriter().encode(url,
BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);
int[] pixels = new int[QR_WIDTH * QR_HEIGHT];
// 下面这里按照二维码的算法，逐个生成二维码的图片，
// 两个for循环是图片横列扫描的结果
for (int y = 0; y < QR_HEIGHT; y++) {
for (int x = 0; x < QR_WIDTH; x++) {
if (bitMatrix.get(x, y)) {
pixels[y * QR_WIDTH + x] = 0xff000000;
} else {
pixels[y * QR_WIDTH + x] = 0xffffffff;
}
}
}
// 生成二维码图片的格式，使用ARGB_8888
Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);
// 显示到一个ImageView上面
// sweepIV.setImageBitmap(bitmap);
return bitmap;
} catch (WriterException e) {
Log.i("log", "生成二维码错误" + e.getMessage());
return null;
}
}
private static final int BLACK = 0xff000000;
/**
* 生成一个二维码图像
*
* @param url
* 传入的字符串，通常是一个URL
* @param widthAndHeight
* 图像的宽高
* @return
*/
public static Bitmap createQRCode(String str, int widthAndHeight)
throws WriterException {
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix matrix = new MultiFormatWriter().encode(str,
BarcodeFormat.QR_CODE, widthAndHeight, widthAndHeight);
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] = BLACK;
}
}
}
Bitmap bitmap = Bitmap.createBitmap(width, height,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}
}
这里功能基本上够用了，剩下的自己再琢磨琢磨吧！
还是那句话： 演示图：
源代码下载地址：
http://download.csdn.net/detail/xiaorenwu1206/7785619
希望有高手指点其中的不足啊！小白谢过。。。
