How does android obtain the source image of the local address book?

How does android obtain the source image of the local address book?

When talking about the contact in the previous articles, all the headers obtained are stored in the database:

 cursor = context.getContentResolver().query(                      ContentUris.withAppendedId(ContactsContract.Data.CONTENT_URI, photoId),                      new String[] { Photo.PHOTO }, null, null, null);  

To obtain

In fact, if we add a library or a picture to a contact in the Local Address Book, the system will store the clear picture of the picture. If we want to get the picture, we need contactId.

getListView().setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView
  parent, View view, int position, long id) {try {Cursor cursor = (Cursor) getListAdapter().getItem(position);if (cursor == null) {return;}int contactId = cursor.getInt(Personal.ID_COLUMN_INDEX);Intent intent = new Intent();intent.setClass(ContactsList.this, ContactDetail.class);intent.putExtra("contactId",contactId);startActivity(intent);}catch(Exception ex) {ex.printStackTrace();}}});

If you want the image to have rounded corners, you can do this:

     
 
                  <frameLayout            android:id="@+id/contacts_logo_layout"            android:layout_width="@dimen/incall_photo_view_size"            android:layout_height="@dimen/incall_photo_view_size" >            
              
              
          </frameLayout>            
 

Java code:

@ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); requestWindowFeature (Window. FEATURE_NO_TITLE); setContentView (R. layout. contact_detail); int contactId = getIntent (). getIntExtra ("contactId", 0); contact_photo = (ImageView) findViewById (R. id. contact_photo); loadTask task = new loadTask(contactId);task.exe cute ();} private class loadTask extends AsyncTask
 
  
{Public loadTask (int id) {contactId = id;} private int contactId; @ Overrideprotected Bitmap doInBackground (Void... params) {InputStream inputStream = openDisplayPhoto (contactId); BitmapFactory. options opt = new BitmapFactory. options (); opt. inSampleSize = 1; Bitmap bitmap = BitmapFactory. decodeStream (inputStream, null, opt); return bitmap;} @ Overrideprotected void onPostExecute (Bitmap result) {if (result! = Null) {contact_photo.setImageBitmap (result);} super. onPostExecute (result) ;}} public InputStream openDisplayPhoto (long contactId ){
  // This is the inputStream code that obtains the clear graph.Uri contactUri = ContentUris. withAppendedId (Contacts. CONTENT_URI, contactId); Uri displayPhotoUri = Uri. withAppendedPath (contactUri, Contacts. photo. DISPLAY_PHOTO); try {AssetFileDescriptor fd = this. getContentResolver (). openAssetFileDescriptor (displayPhotoUri, "r"); return fd. createInputStream ();} catch (IOException e) {e. printStackTrace (); return null ;}}
 

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