zxing条形码扫描

参考http://blog.csdn.net/hellogv/article/details/6101663
使用zxing的第三方包. http://code.google.com/p/zxing
请引入一个core.jar和PlanarYUVLuminanceSource.java文件. 下载附件并打开
代码如下:

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.camera"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".CameraActivity" android:screenOrientation="landscape"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
    <uses-permission android:name="android.permission.CAMERA"></uses-permission>    
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>    
    <uses-feature android:name="android.hardware.camera" />    
    <uses-feature android:name="android.hardware.camera.autofocus" />
</manifest>

/res/anim/alhp.xml

<?xml version="1.0" encoding="utf-8"?>  
<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_decelerate_interpolator">  
    <alpha android:fromAlpha="1" android:toAlpha="0" android:duration="2000" android:repeatCount="-1"/>  
</set>

main.xml

<?xml version="1.0" encoding="utf-8"?>    
<FrameLayout android:id="@+id/FrameLayout01"    
    android:layout_width="fill_parent" android:layout_height="fill_parent"    
    xmlns:android="http://schemas.android.com/apk/res/android">    
    <SurfaceView android:layout_height="fill_parent"    
        android:id="@+id/sfvCamera" android:layout_width="fill_parent"></SurfaceView>    
    <RelativeLayout android:id="@+id/RelativeLayout01"    
        android:layout_height="fill_parent" android:layout_width="fill_parent">    
        <ImageView android:id="@+id/ImageView01"    
            android:layout_height="100dip" android:layout_width="160dip"></ImageView>    
        <View android:layout_centerVertical="true"    
            android:layout_centerHorizontal="true" android:layout_width="300dip"    
            android:background="#55FF6666" android:id="@+id/centerView"    
            android:layout_height="180dip"></View>    
        <TextView android:layout_centerHorizontal="true"    
            android:layout_width="wrap_content" android:layout_below="@+id/centerView"    
            android:layout_height="wrap_content" android:text="Scanning..."    
            android:id="@+id/txtScanResult" android:textColor="#FF000000"></TextView>    
    </RelativeLayout>   
    <View android:id="@+id/animationLine" android:layout_width="fill_parent" android:layout_height="2px" android:background="#FF9790" android:layout_gravity="center_vertical"></View>  
</FrameLayout> 

主Activity文件:

package com.camera;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.TextView;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;
import com.util.PlanarYUVLuminanceSource;
import com.util.SFHCamera;
public class CameraActivity extends Activity {    
    /** Called when the activity is first created. */    
    private SurfaceView sfvCamera;    
    private SFHCamera sfhCamera;    
    private ImageView imgView;    
    private View centerView;    
    private TextView txtScanResult;    
    private Timer mTimer;    
    private MyTimerTask mTimerTask;    
    // 按照标准HVGA    
    final static int width = 480;    
    final static int height = 320;    
    int dstLeft, dstTop, dstWidth, dstHeight;    
    @Override    
    public void onCreate(Bundle savedInstanceState) {    
        super.onCreate(savedInstanceState);    
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        setContentView(R.layout.main);    
        this.setTitle("Android条码/二维码识别Demo-----hellogv");    
        imgView = (ImageView) this.findViewById(R.id.ImageView01);    
        centerView = (View) this.findViewById(R.id.centerView);    
        sfvCamera = (SurfaceView) this.findViewById(R.id.sfvCamera);    
        sfhCamera = new SFHCamera(sfvCamera.getHolder(), width, height,    
                previewCallback);    
        txtScanResult=(TextView)this.findViewById(R.id.txtScanResult);    
        // 初始化定时器    
        mTimer = new Timer();    
        mTimerTask = new MyTimerTask();    
        mTimer.schedule(mTimerTask, 0, 2000);    
        Animation animation = AnimationUtils.loadAnimation(this, R.anim.alph);  
        ((View)findViewById(R.id.animationLine)).startAnimation(animation);
    }    
        
    class MyTimerTask extends TimerTask {    
        @Override    
        public void run() {    
            if (dstLeft == 0) {//只赋值一次    
                dstLeft = centerView.getLeft() * width    
                        / getWindowManager().getDefaultDisplay().getWidth();    
                dstTop = centerView.getTop() * height    
                        / getWindowManager().getDefaultDisplay().getHeight();    
                dstWidth = ((centerView.getRight() - centerView.getLeft())* width    
                        / getWindowManager().getDefaultDisplay().getWidth());    
                dstHeight = (centerView.getBottom() - centerView.getTop())* height    
                        / getWindowManager().getDefaultDisplay().getHeight();    
                System.out.println("dstLeft:"+dstLeft+"   dstTop:"+dstTop+"   dstWidth:"+dstWidth+"   dstHeight:"+dstHeight);
                sfhCamera.AutoFocusAndPreviewCallback();
            }    
            
        }    
    }    
    /**  
     *  自动对焦后输出图片  
     */    
    private Camera.PreviewCallback previewCallback = new Camera.PreviewCallback() {    
        @Override    
        public void onPreviewFrame(byte[] data, Camera camera) {   
            //取得指定范围的帧的数据    
            PlanarYUVLuminanceSource source = new PlanarYUVLuminanceSource(data, width, height, dstLeft, dstTop, dstWidth, dstHeight,false);    
            //取得灰度图    
            Bitmap mBitmap = source.renderCroppedGreyscaleBitmap();    
            //显示灰度图    
            imgView.setImageBitmap(mBitmap);    
            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));    
            MultiFormatReader reader = new MultiFormatReader();    
            try {    
            	saveImage(mBitmap);
            	Hashtable hints = new Hashtable();  
                hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");  
                Result result = reader.decode(bitmap,hints);    
                String strResult = "BarcodeFormat:"    
                        + result.getBarcodeFormat().toString() + "  text:"    
                        + result.getText();    
                txtScanResult.setText(strResult);    
            } catch (Exception e) {    
                txtScanResult.setText("Scanning");   
                sfhCamera.AutoFocusAndPreviewCallback();
            }    
        }    
    };   
    @Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
    	if(keyCode==KeyEvent.KEYCODE_BACK&&event.getRepeatCount()==0){  
    		sfhCamera.closeCamera();
    	}
		return super.onKeyDown(keyCode, event);
	}
	@Override
	protected void onResume() {
		if (getRequestedOrientation() != ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) {
			setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
		}
		super.onResume();
	}
	
	private void saveImage(Bitmap mBitmap){
		File file=new File("/sdcard/feng.png"); 
        try { 
            FileOutputStream out=new FileOutputStream(file); 
            if(mBitmap.compress(Bitmap.CompressFormat.PNG, 50, out)){ 
                out.flush(); 
                out.close(); 
            } 
        } catch (FileNotFoundException e) { 
            e.printStackTrace(); 
        } catch (IOException e) { 
            e.printStackTrace(); 
        } 
	}
}  

SFHCamera.java

package com.util;
import java.io.IOException;    
import android.graphics.PixelFormat;    
import android.hardware.Camera;    
import android.util.Log;    
import android.view.SurfaceHolder;    
public class SFHCamera implements SurfaceHolder.Callback{    
    private SurfaceHolder holder = null;    
    private Camera mCamera;    
    private int width,height;    
    private Camera.PreviewCallback previewCallback;    
        
    public SFHCamera(SurfaceHolder holder,int w,int h,Camera.PreviewCallback previewCallback) {    
        this.holder = holder;      
        this.holder.addCallback(this);      
        this.holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);    
        width=w;    
        height=h;    
        this.previewCallback=previewCallback;    
    }    
        
    @Override    
    public void surfaceChanged(SurfaceHolder arg0, int format, int w, int h) {    
        Camera.Parameters parameters = mCamera.getParameters();    
        parameters.setPreviewSize(width, height);//设置尺寸      
        parameters.setPictureFormat(PixelFormat.JPEG);    
//        parameters.set("orientation", "portrait");
        mCamera.setParameters(parameters);    
        
        mCamera.startPreview();//开始预览    
        Log.e("Camera","surfaceChanged");    
    }    
    @Override    
    public void surfaceCreated(SurfaceHolder arg0) {    
        mCamera = Camera.open();//启动服务      
//        mCamera.setDisplayOrientation(90);
        try {      
            mCamera.setPreviewDisplay(holder);//设置预览     
            Log.e("Camera","surfaceCreated");    
        } catch (IOException e) {      
            mCamera.release();//释放      
            mCamera = null;      
        }    
            
    }    
    @Override    
    public void surfaceDestroyed(SurfaceHolder arg0) {    
/*        mCamera.setPreviewCallback(null);    
        mCamera.stopPreview();//停止预览      
        mCamera = null;    */
        Log.e("Camera","surfaceDestroyed");    
    }    
    /**  
     * 自动对焦并回调Camera.PreviewCallback  
     */    
    public void AutoFocusAndPreviewCallback()    
    {    
        if(mCamera!=null)    
            mCamera.autoFocus(mAutoFocusCallBack);    
    }    
        
    /**  
     * 自动对焦  
     */    
    private Camera.AutoFocusCallback mAutoFocusCallBack = new Camera.AutoFocusCallback() {      
              
        @Override      
        public void onAutoFocus(boolean success, Camera camera) {   
        	mCamera.setOneShotPreviewCallback(previewCallback);       
        }      
    };    
     public void closeCamera(){
    	 mCamera.stopPreview();
    	 mCamera.release();
    	 mCamera = null;
     }
    
}

评论

3 楼 liangzedong 2012-09-06  

Dear 楼主，
     按照您的步骤做了，但是在真机上面运行后报错，本人愚笨，能否把您的demo发给我，我的邮箱[e-mail] ,感谢至极!

2 楼 rayln 2011-11-15  

web8610 写道

兄弟 这个代码缺文件 R.anim.alph R.id.animationLine 能不能发给我啊 [e-mail] 万分感谢

兄弟, 不好意思哈, 更新了部分,没更新全. 横线动画部分没更新. 你看看代码我更新了, 加了alph.xml动画效果, 还有就是main.xml中加入了一个View显示一条横线!

1 楼 web8610 2011-11-15  

兄弟 这个代码缺文件 R.anim.alph R.id.animationLine 能不能发给我啊 [e-mail] 万分感谢