网站建设廾金手指专业壹陆,金色财经网站开发,爱网之家,网站获取访客好久没有写东西了。备份下知识吧。免得忘记了 。 首先贴一段代码 #xff0d;#xff0d; 这个是先生成一个本地的路径#xff0c;将图片保存到这个文件中#xff0c;然后扫描下sd卡。让系统相册重新加载下 。缺点就是只能保存到DCIM的文 件夹下边#xff0c;暂时不知道怎…好久没有写东西了。备份下知识吧。免得忘记了 。 首先贴一段代码 这个是先生成一个本地的路径将图片保存到这个文件中然后扫描下sd卡。让系统相册重新加载下 。缺点就是只能保存到DCIM的文 件夹下边暂时不知道怎么获取系统相机的路径网上找了下说了好几个方法。其中有一条就是去读取本地的图片然后根据一定的规则识别出本地相册的路径 保存下不过觉得性能不是很好。谁有更好的方法可以提供下。 private class DownloadTask extends AsyncTaskString, Integer, String {private Context context;private String filepath;public int fileLength 0; public DownloadTask(Context context) {this.context context;File cacheDir new File(ImageLoader.getExternalCacheDir(context).getAbsolutePath() );if(!cacheDir.exists()) {cacheDir.mkdirs();}
// filepath ImageLoader.getExternalCacheDir(context).getAbsolutePath() File.separator caihongjiayuan.jpg;filepath UIUtils.generateDownloadPhotoPath();}SuppressWarnings(resource)Overrideprotected String doInBackground(String... sUrl) {PowerManager pm (PowerManager) context.getSystemService(Context.POWER_SERVICE);PowerManager.WakeLock wl pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, getClass().getName());wl.acquire();InputStream input null;OutputStream output null;HttpURLConnection connection null;try {URL url new URL(sUrl[0]);connection (HttpURLConnection) url.openConnection();connection.setConnectTimeout(5000);connection.setReadTimeout(20000);connection.connect();// expect HTTP 200 OK, so we dont mistakenly save error report// instead of the fileif (connection.getResponseCode() ! HttpURLConnection.HTTP_OK)return Server returned HTTP connection.getResponseCode() connection.getResponseMessage();fileLength connection.getContentLength();input connection.getInputStream();output new FileOutputStream(filepath);byte data[] new byte[4096];long total 0;int count;while ((count input.read(data)) ! -1) {// allow canceling with back buttonif (isCancelled())return null;total count;if (fileLength 0) // only if total length is knownpublishProgress((int)total);output.write(data, 0, count);}} catch (Exception e) {return null;} finally {try {if (output ! null)output.close();if (input ! null)input.close();} catch (IOException ignored) {}if (connection ! null)connection.disconnect();wl.release();}return filepath;}Overrideprotected void onProgressUpdate(Integer... values) {// TODO Auto-generated method stubsuper.onProgressUpdate(values);float progress (float)values[0]/(float)fileLength;mProgressInfo.setText(getString(R.string.download_progress_info,StringUtils.getKBUnitString(values[0]),StringUtils.getKBUnitString(fileLength)));mProgressBar.setProgress((int)(progress * 100));}Overrideprotected void onPostExecute(String result) {// TODO Auto-generated method stubsuper.onPostExecute(result);mDownloadView.setVisibility(View.GONE);if (!TextUtils.isEmpty(result)) {ImageUtils.scanFile(mCurrentActivity, filepath);ToastUtils.showLongToast(mCurrentActivity, mCurrentActivity.getString(R.string.tips_img_save_path, filepath));}else {ToastUtils.showLongToast(mCurrentActivity, R.string.tips_download_photo_faile);}//
// Bitmap bitmap BitmapFactory.decodeFile(filepath);
// boolean flag ImageUtils.insertImageToAllbum(bitmap, mCurrentActivity);
// if (flag) {ToastUtils.showLongToast(mCurrentActivity, R.string.tips_download_photo_success);
// }else {
// ToastUtils.showLongToast(mCurrentActivity, R.string.tips_download_photo_faile);
// }}}参考了下别的文章找到下边一个方法能解决大部分机型适配的问题且可以将照片保存到系统相机拍完照的目录下。供大家参考。 private class DownloadTask extends AsyncTaskString, Integer, Boolean {private Context context;public int fileLength 0;private Bitmap bmp; public DownloadTask(Context context) {this.context context;File cacheDir new File(ImageLoader.getExternalCacheDir(context).getAbsolutePath() );if(!cacheDir.exists()) {cacheDir.mkdirs();}}SuppressWarnings(resource)Overrideprotected Boolean doInBackground(String... sUrl) {PowerManager pm (PowerManager) context.getSystemService(Context.POWER_SERVICE);PowerManager.WakeLock wl pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, getClass().getName());wl.acquire();InputStream input null;ByteArrayOutputStream output null;HttpURLConnection connection null;try {URL url new URL(sUrl[0]);connection (HttpURLConnection) url.openConnection();connection.setConnectTimeout(5000);connection.setReadTimeout(20000);connection.connect();// expect HTTP 200 OK, so we dont mistakenly save error report// instead of the fileif (connection.getResponseCode() ! HttpURLConnection.HTTP_OK)return false;fileLength connection.getContentLength();input connection.getInputStream();output new ByteArrayOutputStream();byte data[] new byte[4096];long total 0;int count;while ((count input.read(data)) ! -1) {// allow canceling with back buttonif (isCancelled())return false;total count;if (fileLength 0) // only if total length is knownpublishProgress((int)total);output.write(data, 0, count);}bmp BitmapFactory.decodeByteArray(output.toByteArray(),0 , output.toByteArray().length);return true;} catch (Exception e) {return false;} finally {try {if (output ! null)output.close();if (input ! null)input.close();} catch (IOException ignored) {}if (connection ! null)connection.disconnect();wl.release();}}Overrideprotected void onProgressUpdate(Integer... values) {// TODO Auto-generated method stubsuper.onProgressUpdate(values);float progress (float)values[0]/(float)fileLength;mProgressInfo.setText(getString(R.string.download_progress_info,StringUtils.getKBUnitString(values[0]),StringUtils.getKBUnitString(fileLength)));mProgressBar.setProgress((int)(progress * 100));}Overrideprotected void onPostExecute(Boolean result) {// TODO Auto-generated method stubsuper.onPostExecute(result);mDownloadView.setVisibility(View.GONE);if (result.booleanValue() ImageUtils.insertImageToAllbum(bmp, mCurrentActivity)) {}else {ToastUtils.showLongToast(mCurrentActivity, R.string.tips_download_photo_faile);}}} 两个方法的区别就是将FileOutputStream换成了ByteArrayOutputStream项目中主要是有显示下载进度条的需求所以稍微复杂了点。 另外 ImageUtils 中insertImage 方法如下。 public static boolean insertImageToAllbum(Bitmap bitmap,Context mContext) {if (bitmap ! null) {String uri MediaStore.Images.Media.insertImage(mContext.getContentResolver(),bitmap, , );if (!TextUtils.isEmpty(uri)) {String filePath getRealPathFromURI(Uri.parse(uri),mContext);ToastUtils.showLongToast(mContext, mContext.getString(R.string.tips_img_save_path, filePath));scanFile(mContext,filePath);return true;}}return false;}public static void scanFile(Context mContext,String path){MediaScannerConnection.scanFile(mContext, new String[] { path }, null,new MediaScannerConnection.OnScanCompletedListener() {public void onScanCompleted(String path, Uri uri) {}});}方法scanFile是让系统重新加载SD卡的 。。 over有疑问请留言欢迎指正错误。 转载于:https://www.cnblogs.com/gengsy/p/3905023.html
