二维码的生成，扫描（ZXing开源的依赖库）

最新推荐文章于 2025-11-16 06:19:59 发布

原创最新推荐文章于 2025-11-16 06:19:59 发布 · 1.6k 阅读

1 ·

CC 4.0 BY-SA版权

本文介绍了如何利用ZXing开源库进行二维码的扫描和生成。首先，添加依赖到项目中，接着配置必要的权限，然后实现扫描系统相册中的二维码功能。最后，在onActivityResult方法中处理扫描结果。

第一：二维码扫描：

1.需要添加依赖：

compile 'cn.yipianfengye.android:zxing-library:2.1'

2.需要在application中进行注册

    public void onCreate() {
        super.onCreate();
        //声明一下
        ZXingLibrary.initDisplayOpinion(this);
    }

3.需要在Actiivty中进行跳转回传值，进行拿到扫描返回的数据

final int REQUEST_CODE=1;

button1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
                  //常量，请求码，可以任意定义
               startActivityForResult(intent, REQUEST_CODE);
            }
        });

4.在onActivityResult的方法中拿到返回的数据

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_CODE) {
        //处理扫描结果（在界面上显示）
        if (null != data) {
            Bundle bundle = data.getExtras();
            if (bundle == null) {
                return;
            }
            if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_SUCCESS) {
                String result = bundle.getString(CodeUtils.RESULT_STRING);
                Log.i(Tag, "解析结果:" + result);
                    Intent in=new Intent(MainActivity.this,WebActivity.class);
                    in.putExtra("result",result);   
                     startActivity(in);//在webView上面展示
    } else if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED) {                             Log.i(Tag, "解析失败");
            }        }    }}

5.权限：

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.FLASHLIGHT" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />

6.进行扫描系统相册的二维码

final int REQUEST_IMAGECODE=2;

button_z.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("image/*");
        startActivityForResult(intent, REQUEST_IMAGECode);
    }
});
//生成二维码
button_s.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        //生成二维码
        Bitmap mBitmap = CodeUtils.createImage("http://blog.youkuaiyun.com/marry_/article/details/70224352", 400, 400, null);
        im.setImageBitmap(mBitmap);
    }
});
//自定义生成二维码
 button_zd.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        //自定义生成二维码
        Bitmap  mBitmap = CodeUtils.createImage("http://blog.youkuaiyun.com/marry_/article/details/70224352", 400, 400, BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher));
        im.setImageBitmap(mBitmap);
    }
});

7.在onActivityResult方法中进行回调

//获得图片的结果
if(requestCode==REQUEST_IMAGE){
    if(data!=null){
        Uri uri = data.getData();
        ContentResolver cr = getContentResolver();
        try {
            Bitmap mBitmap = MediaStore.Images.Media.getBitmap(cr, uri);//显得到bitmap图片

            CodeUtils.analyzeBitmap(ImageUtils.getImageAbsolutePath(this,uri), new CodeUtils.AnalyzeCallback() {
                @Override
                public void onAnalyzeSuccess(Bitmap mBitmap, String result) {
                                      Log.i(Tag, "解析结果:" + result);
                    Intent in=new Intent(MainActivity.this,WebActivity.class);
                    in.putExtra("result",result);   
                     startActivity(in);//在webView上面展示
                }                @Override                public void onAnalyzeFailed() {
                    Log.i(Tag, "解析失败" + result);
                }            });            if (mBitmap != null) {                mBitmap.recycle();            }        } catch (Exception e) {            e.printStackTrace();        }    }}

8.用到一个工具类进行android4.4版本以上的uri的转换

public class ImageUtils {
    /**
     * 根据Uri获取图片绝对路径，解决Android4.4以上版本Uri转换
      *
     *
     *
     */
    @TargetApi(19)
    public static String getImageAbsolutePath(Context context, Uri imageUri) {
        if (context == null || imageUri == null)
            return null;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, imageUri)) {
            if (isExternalStorageDocument(imageUri)) {
                String docId = DocumentsContract.getDocumentId(imageUri);
                String[] split = docId.split(":");
                String type = split[0];
                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }
            } else if (isDownloadsDocument(imageUri)) {
                String id = DocumentsContract.getDocumentId(imageUri);
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
                return getDataColumn(context, contentUri, null, null);
            } else if (isMediaDocument(imageUri)) {
                String docId = DocumentsContract.getDocumentId(imageUri);
                String[] split = docId.split(":");
                String type = split[0];
                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }
                String selection = MediaStore.Images.Media._ID + "=?";
                String[] selectionArgs = new String[]{split[1]};
                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        } // MediaStore (and general)
        else if ("content".equalsIgnoreCase(imageUri.getScheme())) {
          
            if (isGooglePhotosUri(imageUri))
                return imageUri.getLastPathSegment();
            return getDataColumn(context, imageUri, null, null);
        }
      
        else if ("file".equalsIgnoreCase(imageUri.getScheme())) {
            return imageUri.getPath();
        }
        return null;
    }

    public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
        Cursor cursor = null;
        String column = MediaStore.Images.Media.DATA;
        String[] projection = {column};
        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
            if (cursor != null && cursor.moveToFirst()) {
                int index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     */
    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is Google Photos.
     */
    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }


}