mediastore

MainActivity is as follows: Package C. c; import android. app. activity; import android. content. contentvalues; import android. content. intent; import android.net. uri; import android. OS. bundle; import android. provider. mediastore; import android. view. view; import android. view. view. onclicklistener; import android. widget. button; import android. widget. edittext;/*** demo Description: * 1. Use the System camera to take a video. * 2. Use the

the one in the album is found. If the picture is deleted from the album, the image in the specified path is left in the cell phone, wasting memory !!! In short, I personally think the above method is a little pitfall. Delete images Private void DeleteImage (String imgPath) {ContentResolver resolver = context. getContentResolver (); Cursor cursor = MediaStore. images. media. query (resolver, MediaStore. ima

(cursor.getColumnIndex(ImageColumns.DATA)));photos.add(photoModel);}} while (cursor.moveToPrevious());return photos;} (4) Take a photo and update the local photo in time Public void photo () {// Intent openCameraIntent = new Intent (MediaStore. ACTION_IMAGE_CAPTURE); // startActivityForResult (openCameraIntent, TAKE_PICTURE); try {File dir = new File (Environment. getExternalStorageDirectory () + "/" + localTempImgDir); System. out. pri

Android multimedia-System camera To take a photo with a system camera and return the photo, follow these steps:[1] Permission [2] Start the camera with intent Intent intent = new Intent (); intent. setAction (MediaStore. ACTION_IMAGE_CAPTURE); // implicitly start the System camera [3] set the image storage location and name File = new File (Environment. getExternalStorageDirectory (), System. currentTimeMillis () +. jpg); // create a new

MainActivity: [java] package c. c; import android. app. activity; import android. content. contentValues; import android. content. intent; import android.net. uri; import android. OS. bundle; import android. provider. mediaStore; import android. view. view; import android. view. view. onClickListener; import android. widget. button; import android. widget. editText;/*** Demo Description: * 1. Use the System camera to take a video. * 2. Use the system

-primary volumes} // DownloadsProvider else if (isDownloadsDocument (uri )) {final String id = DocumentsContract. getentid (uri); final Ur I contentUri = ContentUris. withAppendedId (Uri. parse ("content: // downloads/public_downloads"), Long. valueOf (id); return getDataColumn (context, contentUri, null, null);} // MediaProvider else if (isMediaDocument (uri) {final String docId = DocumentsContract. getentid (uri); final String [] split = docId. split (":"); final String type = split [0]; Uri c

obtain images. The first is camera shooting, and the second is to obtain images from a local album. 2. I created a folder on the SD card with two Uris. One is used to save the original image and the other is the saved cropped image. I have previously considered using the same Uri to save the image, but in practice I encountered a problem. If the image is not cropped after being taken, the next time I get the image from the SD card, it will be the big image saved by the photo, not only does the

:[ Java] public static Bitmap getVideoThumbnail (ContentResolver cr, Uri uri) {Bitmap bitmap = null; BitmapFactory. options options = new BitmapFactory. options (); options. inDither = false; options. inPreferredConfig = Bitmap. config. ARGB_8888; Cursor cursor = cr. query (uri, new String [] {MediaStore. video. media. _ ID}, null); if (cursor = null | cursor. getCount () = 0) {return null;} cursor. MoveToFirst (); String videoId = cursor. getString

Android: How to obtain and compress local Images, During the two days of Project creation, the image upload function encountered two problems: how to obtain the path of the selected image, and how to compress the image, after checking some information and reading what others wrote, I finally made a hard move and recorded it here. First, to select images, we need to obtain all local images first. Android has encapsulated this intent for us. 1 Intent intent = new Intent (Intent. ACTION_PICK, null)

Android multimedia-learn to use the system camera in step 5 To take a photo with a system camera and return the photo, follow these steps:[1] Permission [2] Start the camera with intent Intent intent = new Intent (); intent. setAction (MediaStore. ACTION_IMAGE_CAPTURE); // implicitly start the System camera [3] set the image storage location and name File = new File (Environment. getExternalStorageDirectory (), System. currentTimeMillis (

(); initEvent ();}/*** uses ContentProvider to scan pictures on your mobile phone. This method scans images in the Child thread, the folder with the most jpg files */private vo Id getImages () {if (! Environment. getExternalStorageState (). equals (Environment. MEDIA_MOUNTED) {Toast. makeText (this, "No external storage", Toast. LENGTH_SHORT ). show (); return;} // display the progress bar mProgressDialog = ProgressDialog. show (this, null, "loading... "); new Thread (new Runnable () {@ Overrid

(cursor.getLong(cursor.getColumnIndex(ImageColumns.SIZE)) > 1024 * 10) {PhotoModel photoModel = new PhotoModel();photoModel.setOriginalPath(cursor.getString(cursor.getColumnIndex(ImageColumns.DATA)));photos.add(photoModel);}} while (cursor.moveToPrevious());return photos;} (4) Take a photo and update the local album in time Public void photo () {// Intent openCameraIntent = new Intent (MediaStore. ACTION_IMAGE_CAPTURE); // startActivit

state = Environment. getExternalStorageState (); if (Environment. MEDIA_MOUNTED.equals (state) {final Intent takePictureImIntent = new Intent (MediaStore. ACTION_IMAGE_CAPTURE); ContentValues values = new ContentValues (); mPhotoUri = getContentResolver (). insert (MediaStore. images. media. EXTERNAL_CONTENT_URI, values); takePictureImIntent. putExtra (android. provider.

intent (intent. action_send ); String [] TOS = {"me@abc.com "}; String [] CCS = {"you@abc.com "}; It. putextra (intent. extra_email, TOS ); It. putextra (intent. extra_cc, CCS ); It. putextra (intent. extra_text, "theemail body text "); It. putextra (intent. extra_subject, "theemail subject text "); It. settype ("message/rfc822 "); Startactivity (intent. createchooser (IT, "Choose email client ")); Intent it = newintent (intent. action_send ); It. putextra (intent. extra_subject, "theemail sub