android webview长按识别图片 ，利用zxing识别图片是否是二维码
http://img.blog.csdn.net/20160509211248794?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center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： view plain copy[*]@Override
[*] public 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： view plain copy
[*]@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： view plain copy
[*]/**
[*] * 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： view plain copy
[*]/**
[*] * 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” view plain copy
[*]@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 ： view plain copy
[*]/***
[*] * 功能：用线程保存图片
[*] *
[*] * @author wangyp
[*] *
[*] */
[*] private class SaveImage extends AsyncTask<String, Void, String> {
[*] @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;
[*] 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： view plain copy
[*]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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