[转载]android利用zbar二维码扫描-(解决中文乱码及扫描区域定义)

写在最前（这是对上一篇博文的问题做的更新【android利用zbar二维码扫描】）
前天早上登陆CSDN时候一条消息：一网友提出了两点疑惑

扫描框目前只是做的假象，是全屏的图片进行解析
中文乱码现象

各种查找，今天得以修复：及时共享给各位网友.

1.扫描框定义

/***  2014-7-15   上午11:14:21*  Created By niexiaoqiang*/package com.example.qu;import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;/*** 查找框* @author niexiaoqiang*/
public class FinderView extends View {private static final long ANIMATION_DELAY = 30;private Paint finderMaskPaint;private int measureedWidth;private int measureedHeight;public FinderView(Context context) {super(context);init(context);}public FinderView(Context context, AttributeSet attrs) {super(context, attrs);init(context);}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);canvas.drawRect(leftRect, finderMaskPaint);canvas.drawRect(topRect, finderMaskPaint);canvas.drawRect(rightRect, finderMaskPaint);canvas.drawRect(bottomRect, finderMaskPaint);//画框zx_code_kuang.setBounds(middleRect);zx_code_kuang.draw(canvas);if (lineRect.bottom < middleRect.bottom) {zx_code_line.setBounds(lineRect);lineRect.top = lineRect.top + lineHeight / 2;lineRect.bottom = lineRect.bottom + lineHeight / 2;} else {lineRect.set(middleRect);lineRect.bottom = lineRect.top + lineHeight;zx_code_line.setBounds(lineRect);}zx_code_line.draw(canvas);postInvalidateDelayed(ANIMATION_DELAY, middleRect.left, middleRect.top, middleRect.right, middleRect.bottom);}private Rect topRect = new Rect();private Rect bottomRect = new Rect();private Rect rightRect = new Rect();private Rect leftRect = new Rect();private Rect middleRect = new Rect();private Rect lineRect = new Rect();private Drawable zx_code_kuang;private Drawable zx_code_line;private int lineHeight;private void init(Context context) {int finder_mask = context.getResources().getColor(R.color.finder_mask);finderMaskPaint = new Paint(Paint.ANTI_ALIAS_FLAG);finderMaskPaint.setColor(finder_mask);zx_code_kuang = context.getResources().getDrawable(R.drawable.zx_code_kuang);zx_code_line = context.getResources().getDrawable(R.drawable.zx_code_line);lineHeight = 30;}//新增该方法///*** 根据图片size求出矩形框在图片所在位置，tip：相机旋转90度以后，拍摄的图片是横着的，所有传递参数时，做了交换* @param w* @param h* @return*/public Rect getScanImageRect(int w, int h) {//先求出实际矩形Rect rect = new Rect();rect.left = middleRect.left;rect.right = middleRect.right;float temp = h / (float) measureedHeight;rect.top = (int) (middleRect.top * temp);rect.bottom = (int) (middleRect.bottom * temp);return rect;}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);measureedWidth = MeasureSpec.getSize(widthMeasureSpec);measureedHeight = MeasureSpec.getSize(heightMeasureSpec);int borderWidth = measureedWidth / 2 + 100;middleRect.set((measureedWidth - borderWidth) / 2, (measureedHeight - borderWidth) / 2, (measureedWidth - borderWidth) / 2 + borderWidth, (measureedHeight - borderWidth) / 2 + borderWidth);lineRect.set(middleRect);lineRect.bottom = lineRect.top + lineHeight;leftRect.set(0, middleRect.top, middleRect.left, middleRect.bottom);topRect.set(0, 0, measureedWidth, middleRect.top);rightRect.set(middleRect.right, middleRect.top, measureedWidth, middleRect.bottom);bottomRect.set(0, middleRect.bottom, measureedWidth, measureedHeight);}
}

2.扫描界面

package com.example.qu;import net.sourceforge.zbar.Config;
import net.sourceforge.zbar.Image;
import net.sourceforge.zbar.ImageScanner;
import net.sourceforge.zbar.Symbol;
import net.sourceforge.zbar.SymbolSet;
import android.app.Activity;
import android.graphics.Rect;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PreviewCallback;
import android.hardware.Camera.Size;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.TextView;public class MainActivity extends Activity implements SurfaceHolder.Callback {private static String TAG = "xiaoqiang";private Camera mCamera;private SurfaceHolder mHolder;private SurfaceView surface_view;private ImageScanner scanner;private Handler autoFocusHandler;private AsyncDecode asyncDecode;private FinderView finder_view;private TextView textview;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.ac_zbar_finder);init();}private void init() {surface_view = (SurfaceView) findViewById(R.id.surface_view);finder_view = (FinderView) findViewById(R.id.finder_view);textview = (TextView) findViewById(R.id.textview);mHolder = surface_view.getHolder();mHolder.addCallback(this);scanner = new ImageScanner();scanner.setConfig(0, Config.X_DENSITY, 3);scanner.setConfig(0, Config.Y_DENSITY, 3);autoFocusHandler = new Handler();asyncDecode = new AsyncDecode();}@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {if (mHolder.getSurface() == null) {return;}try {mCamera.stopPreview();} catch (Exception e) {}try {mCamera.setDisplayOrientation(90);mCamera.setPreviewDisplay(mHolder);mCamera.setPreviewCallback(previewCallback);mCamera.startPreview();mCamera.autoFocus(autoFocusCallback);} catch (Exception e) {Log.d("DBG", "Error starting camera preview: " + e.getMessage());}}/*** 预览数据*/PreviewCallback previewCallback = new PreviewCallback() {public void onPreviewFrame(byte[] data, Camera camera) {if (asyncDecode.isStoped()) {//              Camera.Parameters parameters = camera.getParameters();//              Size size = parameters.getPreviewSize();//              Image barcode = new Image(size.width, size.height, "Y800");//              barcode.setData(data);//              asyncDecode = new AsyncDecode();//              asyncDecode.execute(barcode);Camera.Parameters parameters = camera.getParameters();Size size = parameters.getPreviewSize();//图片是被旋转了90度的Image source = new Image(size.width, size.height, "Y800");Rect scanImageRect = finder_view.getScanImageRect(size.height, size.width);//图片旋转了90度，将扫描框的TOP作为left裁剪source.setCrop(scanImageRect.top, scanImageRect.left, scanImageRect.bottom, scanImageRect.right);source.setData(data);asyncDecode = new AsyncDecode();asyncDecode.execute(source);}}};private class AsyncDecode extends AsyncTask<Image, Void, Void> {private boolean stoped = true;private String str = "";@Overrideprotected Void doInBackground(Image... params) {stoped = false;StringBuilder sb = new StringBuilder();Image barcode = params[0];int result = scanner.scanImage(barcode);if (result != 0) {//              mCamera.setPreviewCallback(null);//              mCamera.stopPreview();SymbolSet syms = scanner.getResults();for (Symbol sym : syms) {switch (sym.getType()) {case Symbol.CODABAR:Log.d(TAG, "条形码  " + sym.getData());//条形码  sb.append(sym.getData() + "\n");break;case Symbol.CODE128://128编码格式二维码Log.d(TAG, "128编码格式二维码:  " + sym.getData());sb.append(sym.getData() + "\n");break;case Symbol.QRCODE://QR码二维码  Log.d(TAG, "QR码二维码  :" + sym.getData());sb.append(sym.getData() + "\n");break;case Symbol.ISBN10://ISBN10图书查询  Log.d(TAG, "ISBN10图书查询  :   " + sym.getData());sb.append(sym.getData() + "\n");break;case Symbol.ISBN13://ISBN13图书查询  Log.d(TAG, "ISBN13图书查询   : " + sym.getData());sb.append(sym.getData() + "\n");break;case Symbol.NONE:Log.d(TAG, "未知   : " + sym.getData());sb.append(sym.getData() + "\n");break;default:Log.d(TAG, "其他:   " + sym.getData());sb.append(sym.getData() + "\n");break;}}}str = sb.toString();return null;}@Overrideprotected void onPostExecute(Void result) {super.onPostExecute(result);stoped = true;if (null == str || str.equals("")) {} else {textview.setText(str);}}public boolean isStoped() {return stoped;}}/*** 自动对焦回调*/AutoFocusCallback autoFocusCallback = new AutoFocusCallback() {public void onAutoFocus(boolean success, Camera camera) {autoFocusHandler.postDelayed(doAutoFocus, 1000);}};//自动对焦private Runnable doAutoFocus = new Runnable() {public void run() {if (null == mCamera || null == autoFocusCallback) {return;}mCamera.autoFocus(autoFocusCallback);}};@Overridepublic void surfaceCreated(SurfaceHolder holder) {try {mCamera = Camera.open();} catch (Exception e) {mCamera = null;}}@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {if (mCamera != null) {mCamera.setPreviewCallback(null);mCamera.release();mCamera = null;}}

3.布局定义

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent" ><SurfaceView
        android:id="@+id/surface_view"android:layout_width="match_parent"android:layout_height="match_parent" /><com.example.qu.FinderView
        android:id="@+id/finder_view"android:layout_width="match_parent"android:layout_height="match_parent" /><TextView
        android:id="@+id/textview"android:layout_width="match_parent"android:layout_height="wrap_content"android:background="@android:color/white"android:gravity="center_vertical"android:textColor="@color/rea" /></FrameLayout>

一些资源文件请下载源码，如果没有积分可QQ联系312122330

关于乱码的解决

我重新使用NDK编译了zbar的库，并对zbarlib\jni\zbar\qrcode\qrdectxt.c做了如下修改

/*This is the encoding the standard says is the default.*/
/*********************************************/
/*********   修改此处以支持中文        **********/
/*********************************************/
//latin1_cd=iconv_open("UTF-8","ISO8859-1");
latin1_cd = iconv_open("UTF-8", "GB18030");/*But this one is often used, as well.*/
//sjis_cd = iconv_open("UTF-8", "SJIS");
sjis_cd = iconv_open("UTF-8", "GB2312");
/*********************************************/

NDK编译这块儿有麻烦的朋友，估计就要好好学习下了。东西太多，不好些博文

附代码下载: http://download.csdn.net/download/nie312122330/7747533

文章来原: http://www.itnose.net/detail/6083222.html

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