android webview长按识别图片，利用zxing识别图片是否是二维码

主要实现webwiew的OnLongClick()方法，利用

final HitTestResult htr = getHitTestResult();//获取所点击的内容

判断点击的是不是图片 ，其主要代码是：

@Overridepublic boolean onLongClick(View v) {// 长按事件监听（注意：需要实现LongClickCallBack接口并传入对象）final HitTestResult htr = getHitTestResult();//获取所点击的内容if (htr.getType() == HitTestResult.IMAGE_TYPE|| htr.getType() == HitTestResult.IMAGE_ANCHOR_TYPE|| htr.getType() == HitTestResult.SRC_IMAGE_ANCHOR_TYPE) {//判断被点击的类型为图片if (mCallBack!=null) {mCallBack.onLongClickCallBack(htr.getExtra());}}return false;}

如果判断是为图片后就可以利用zxing 来识别是否是二维码图片了：

  @Override    public void onLongClickCallBack(final String imgUrl) {        imgurl=imgUrl;        // 获取到图片地址后做相应的处理        new Thread(){            public void run() {                decodeImage(imgUrl);                handler.sendEmptyMessage(0);            };        }.start();        showDialog();    }

首先 我们把图片的链接地址 转换成图片：

 /**     * 根据地址获取网络图片     * @param sUrl 图片地址     * @return     * @throws IOException     */    public static Bitmap getBitmap(String sUrl){        try {            URL url = new URL(sUrl);            HttpURLConnection conn = (HttpURLConnection)url.openConnection();            conn.setConnectTimeout(5000);            conn.setRequestMethod("GET");            if(conn.getResponseCode() == 200){                InputStream inputStream = conn.getInputStream();                Bitmap bitmap = BitmapFactory.decodeStream(inputStream);                return bitmap;            }        } catch (Exception e) {            e.printStackTrace();        }        return null;    }

把链接转出图片了后在识别图片是不是二维码图：

    /**     * 判断是否为二维码     * @param sUrl 图片地址     * @return     */    private boolean decodeImage(String sUrl){        result = DecodeImage.handleQRCodeFormBitmap(getBitmap(sUrl));        if(result == null){            isQR = false;        }else {            isQR = true;        }        return isQR;    }

如果是二维码图片的画发送handle 来更新adapter来显示“识别图中二维码”

 @SuppressLint("HandlerLeak")    private Handler handler = new Handler(){        public void handleMessage(Message msg) {            if (msg.what == 0){                if (isQR){                    adapter.add("识别图中二维码");                }                adapter.notifyDataSetChanged();            }        };    };

点击保存图片了的话使用asnytask线程来保存图片到本地：

 /***     * 功能：用线程保存图片     *     * @author wangyp     *     */    private class SaveImage extends AsyncTask {        @Override        protected String doInBackground(String... params) {            String result = "";            try {                String sdcard;                if (FileUtils.SDisExists()){                    sdcard = Environment.getExternalStorageDirectory().getAbsolutePath();                }else{                    sdcard=getFilesDir().getAbsolutePath();                }                File file = new File(sdcard + "/Download");                if (!file.exists()) {                    file.mkdirs();                }                file = new File(sdcard + "/Download/" + new Date().getTime() + ".jpg");                InputStream inputStream = null;                URL url = new URL(imgurl);                HttpURLConnection conn = (HttpURLConnection) url.openConnection();                conn.setRequestMethod("GET");                conn.setConnectTimeout(20000);                if (conn.getResponseCode() == 200) {                    inputStream = conn.getInputStream();                }                byte[] buffer = new byte[4096];                int len = 0;                FileOutputStream outStream = new FileOutputStream(file);                while ((len = inputStream.read(buffer)) != -1) {                    outStream.write(buffer, 0, len);                }                outStream.close();                result = "图片已保存至：" + file.getAbsolutePath();            } catch (Exception e) {                result = "保存失败！" + e.getLocalizedMessage();            }            return result;        }        @Override        protected void onPostExecute(String result) {           Toast.makeText(H5Activity.this,result,Toast.LENGTH_SHORT).show();        }    }

如果用户点击识别二维码的话把识别好了的二维码链接打开浏览器：

Intent intent = new Intent(Intent.ACTION_VIEW);intent.setData(Uri.parse(result.toString()));startActivity(intent);closeDialog();

这是demo点击打开链接下载

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android webview长按识别图片 ，利用zxing识别图片是否是二维码

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