Android uses open-source libraries to load network images

Android uses open-source libraries to load network images

Android uses open-source libraries to load network images and open-source libraries to load images. Click the pop-up popupwindow dialog box in listview to View Details:

Android clicks the listview pop-up popupwindow pop-up box, and the right-sliding delete button is also included in the box. For details, see: Android uses NineOldAndroids to implement a left-sliding display of the delete itembutton like listview. This way, the project becomes more complex. It gradually adds functions, effects, and code to the project.

 

Project source code: Click

I. view the implementation results

 

Ii. Project Structure

 

Iii. Some source code

1. MyApplication inherits Application

 

Package com. main. listviewsideslip; import java. io. file; import com. nostra13.universalimageloader. cache. disc. impl. unlimitedDiskCache; import com. nostra13.universalimageloader. cache. disc. naming. hashCodeFileNameGenerator; import com. nostra13.universalimageloader. cache. disc. naming. md5FileNameGenerator; import com. nostra13.universalimageloader. cache. memory. impl. lruMemoryCache; import com. nostra13.universalimageloader. cache. memory. impl. usingFreqLimitedMemoryCache; import com. nostra13.universalimageloader. core. displayImageOptions; import com. nostra13.universalimageloader. core. imageLoader; import com. nostra13.universalimageloader. core. imageLoaderConfiguration; import com. nostra13.universalimageloader. core. assist. queueProcessingType; import com. nostra13.universalimageloader. core. decode. baseImageDecoder; import com. nostra13.universalimageloader. core. download. baseImageDownloader; import com. nostra13.universalimageloader. utils. storageUtils; import android. app. application; import android. content. context; public class MyApplication extends Application {public void onCreate () {super. onCreate (); initImageLoader (getApplicationContext ();} public static void initImageLoader (Context context) {// File cacheDir = StorageUtils. getOwnCacheDirectory (context, imageloader/Cache); ImageLoaderConfiguration config = new ImageLoaderConfiguration. builder (context ). memoryCacheExtraOptions (480,800) // max width, max height, that is, the maximum length and width of each cached file. threadPoolSize (3) // Number of threads loaded in the thread pool. threadPriority (Thread. NORM_PRIORITY-2 ). denyCacheImageMultipleSizesInMemory (). diskCacheFileNameGenerator (new Md5FileNameGenerator () // encrypt the URI name stored with MD5. memoryCache (new UsingFreqLimitedMemoryCache (2*1024*1024) // You can pass your own memory cache implementation/You can implement it through your own memory cache. memoryCacheSize (2*1024*1024) // maximum value of the memory cache. diskCacheSize (50*1024*1024) // maximum cached value of 50 Mb SD card (local. tasksProcessingOrder (QueueProcessingType. LIFO) // The original discCache-> diskCache. diskCache (new UnlimitedDiskCache (cacheDir) // customize the cache path. imageDownloader (new BaseImageDownloader (context, 5*1000, 30*1000) // connectTimeout (5 s), readTimeout (30 s) Timeout time. writeDebugLogs () // Remove for release app. build (); // initialize the ImageLoader configuration globally. getInstance (). init (config );}}

2. The network loading configuration is also set in the adapter RecentAdapter.

 

 

Package com. listview. adapter; import java. util. permission list; import android. content. context; import android. view. layoutInflater; import android. view. view; import android. view. view. onClickListener; import android. view. viewGroup; import android. widget. baseAdapter; import android. widget. button; import android. widget. imageView; import android. widget. textView; import com. main. entity. recentItem; import com. main. listviewsideslip. constants; import com. main. listviewsideslip. r; import com. nostra13.universalimageloader. core. displayImageOptions; import com. nostra13.universalimageloader. core. imageLoader; import com. nostra13.universalimageloader. core. display. roundedBitmapDisplayer; import com. view. listview. swipeListView; public class RecentAdapter extends BaseAdapter {private LayoutInflater mInflater; private comment list
 
  
MData; private SwipeListView mListView; private Context mContext; private DisplayImageOptions mOptions; // set the parameter public static String [] mImageUrls; // The image path private ImageLoader mImageLoader; // network image loading class public RecentAdapter (Context context, shortlist
  
   
Data, SwipeListView listview) {mContext = context; this. mInflater = LayoutInflater. from (mContext); mData = data; this. mListView = listview; mImageLoader = ImageLoader. getInstance (); initImageView ();} public void remove (int position) {if (position <mData. size () {mData. remove (position); notifyDataSetChanged () ;}} public void remove (RecentItem item) {if (mData. contains (item) {mData. remove (item); notifyDataSet Changed () ;}} public void addFirst (RecentItem item) {if (mData. contains (item) {mData. remove (item);} mData. addFirst (item); notifyDataSetChanged () ;}@ Overridepublic int getCount () {return mData. size () ;}@ Overridepublic Object getItem (int position) {return mData. get (position) ;}@ Overridepublic long getItemId (int position) {return position ;}@ Overridepublic View getView (final int position, View convertView, ViewGroup parent) {final RecentItem item = mData. get (position); ViewHolder vHolder = null; if (convertView = null) {convertView = mInflater. inflate (R. layout. recent_listview_item, null); vHolder = new ViewHolder (); vHolder. nameTV = (TextView) convertView. findViewById (R. id. recent_list_item_name); vHolder. numTV = (TextView) convertView. findViewById (R. id. unreadmsg); vHolder. headIV = (ImageView) convertView. FindViewById (R. id. icon); vHolder. deleteBtn = (Button) convertView. findViewById (R. id. recent_del_btn); convertView. setTag (vHolder);} else {vHolder = (ViewHolder) convertView. getTag ();} vHolder. nameTV. setText (item. getName ();/*** imageUrl: Specifies the Url of the image. imageView hosts the image's ImageView control options * DisplayImageOptions configuration file */mImageLoader. displayImage (mImageUrls [position], vHolder. headIV, mOptions); int num = item. getNew Num (); if (num> 0) {vHolder. numTV. setVisibility (View. VISIBLE); vHolder. numTV. setText (num +);} else {vHolder. numTV. setVisibility (View. GONE);} vHolder. deleteBtn. setOnClickListener (new OnClickListener () {@ Overridepublic void onClick (View v) {mData. remove (position); policydatasetchanged (); if (mListView! = Null) mListView. closeOpenedItems () ;}}); return convertView;} class ViewHolder {public TextView nameTV; public TextView numTV; public ImageView headIV; public Button deleteBtn ;}
  
 

 

 

3. How to call it is actually in the above adapter. Take a look at MainActivity.

 

Package com. main. listviewsideslip; import java. util. collections; import java. util. using list; import com. listview. adapter. recentAdapter; import com. main. entity. recentItem; import com. view. listview. baseSwipeListViewListener; import com. view. listview. swipeListView; import com. view. pop. actionItem; import com. view. pop. quickAction; import android. OS. bundle; import android. view. view; import android. widget. textView; import android. app. activity; import android. content. intent; public class MainActivity extends Activity {// listview adapter private RecentAdapter mAdapter; // listview data source public extends list
 
  
MRecentDatas; // custom listviewprivate SwipeListView mRecentListView; private TextView mEmpty; private int mClickItem =-1; // click item to bring up protected QuickAction mItemClickQuickAction = null; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); initView (savedInstanceState); initPop () ;}// when you click an item in listview, pop is displayed. The QuickAction implementation class inherits PopupWindowsprivate void initPop () {// sets ActionmItemClickQuickAction = new QuickAction (this, QuickAction. VERTICAL); ActionItem pointItem = new ActionItem (1, details, null); ActionItem areaItem = new ActionItem (2, Information 2, null); pointItem. setIcon (null); areaItem. setIcon (null); mItemClickQuickAction. addActionItem (pointItem); mItemClickQuickAction. addActionItem (areaItem); mItemClickQuickAction. setOnActionItemClickListener (new QuickAction. onActionItemClickListener () {@ Overridepublic void onItemClick (QuickAction source, int pos, int actionId) {if (pos = 0) {Intent intent = new Intent (source. getActionItemsGroup (). getContext (), ListViewItemShowActivity. class); RecentItem item = new RecentItem (); item = mRecentDatas. get (mClickItem); Bundle bundle = new Bundle (); // bundle. putString (HeadImg, mImageUrls [mClickItem]); bundle. putInt (NewNum, item. getNewNum (); bundle. putString (Name, item. getName (); intent. putExtras (bundle); startActivity (intent);} mItemClickQuickAction. dismiss () ;}}) ;}private void initView (Bundle savedInstanceState) {mRecentListView = (SwipeListView) findViewById (R. id. recent_listview); mRecentDatas = getRecentList (); mAdapter = new RecentAdapter (this, mRecentDatas, mRecentListView); mRecentListView. setAdapter (mAdapter); mEmpty = (TextView) findViewById (R. id. empty); mRecentListView. setEmptyView (mEmpty); mRecentListView. setSwipeListViewListener (new BaseSwipeListViewListener () {@ Overridepublic void onClickFrontView (View view, int position) {mClickItem = position; mItemClickQuickAction. show (view) ;}@ Overridepublic void onClickBackView (int position) {mRecentListView. closeOpenedItems (); // close the opened item} @ Overridepublic void onDismiss (int [] reverseSortedPositions) {for (int position: reverseSortedPositions) {mAdapter. remove (position) ;}});} public comment list
  
   
GetRecentList () {Response List
   
    
List = new external list
    
     
(); NameArray = getResources (). getStringArray (R. array. jazzy_javasts_ch); for (int I = 0; I <20; I ++) {// int icon = heads [I]; String name = nameArray [I]; int num = numArray [I]; RecentItem item = new RecentItem (name, 0, num); list. add (item);} Collections. sort (list); // return list in descending order;} public static int [] numArray = {67,423, 90, 12, 978,}; public static String [] nameArray = new String [21];}
    
   
  
 

 

4. Do not forget to configure network permissions and Applications in AndroidManifest. xml.

 

 

Related Articles:

1. Android uses NineOldAndroids to implement a left-sliding display of the imitation listview and delete the itembutton

2. In Android, click listview to bring up the popupwindow pop-up box.