Fragment classification effect

Fragment classification effect
Classification effect implemented by Fragment

Layout file information:

<LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" xmlns: tools = "http://schemas.android.com/tools" android: layout_width = "match_parent" android: layout_height = "match_parent" android: orientation = "vertical" android: layout_margin = "0dp" android: background = "# fffef9" tools: context = ". mianActivity "> <! -- 1 replace the Fragment content! --> <LinearLayout android: id = "@ + id/contentfragment" android: layout_width = "match_parent" android: layout_height = "wrap_content" android: layout_weight = "1" android: orientation = "vertical"> </LinearLayout> <! -- 2 bottom menu --> <LinearLayout android: layout_width = "match_parent" android: layout_height = "wrap_content" android: gravity = "bottom" android: layout_margin = "0dp" android: layout_gravity = "bottom" android: orientation = "horizontal"> <Button android: id = "@ + id/articalmenu" android: layout_width = "match_parent" android: layout_height = "match_parent" android: layout_margin = "0dp" android: layout_weight = "1" android: text = "article"/> <Button android: id = "@ + id/forummenu" android: layout_width = "match_parent" android: layout_height = "match_parent" android: layout_weight = "1" android: layout_margin = "0dp" android: text = "Forum"/> <Button android: id = "@ + id/gamemenu" android: layout_width = "match_parent" android: layout_height = "match_parent" android: layout_weight = "1" android: layout_margin = "0dp" android: text = "games"/> </LinearLayout>

Activity Code:

Package stu. love. game; import stu. love. artical. articalListFragment; import stu. love. forum. forumFragment; import stu. love. utils. imageCacheSDUtils; import android. app. activityManager; import android. content. context; import android. graphics. bitmap; import android. OS. bundle; import android. support. v4.app. fragmentActivity; import android. support. v4.app. fragmentManager; import android. support. v4.app. fragmentTransa Ction; import android. util. log; import android. util. lruCache; import android. view. menu; import android. view. view; import android. view. view. onClickListener; import android. view. window; import android. widget. button; import com. android. volley. requestQueue; import com. android. volley. toolbox. imageLoader. imageCache; import com. android. volley. toolbox. volley;/*** entry test class of the 3DM game program! * **/Public class MianActivity extends FragmentActivity implements OnClickListener {private static String Tag = "MianActivity"; // menu options private Button articlemenu; private Button forummenu; private Button gamemenu; // public RequestQueue queue; public ImageCache imageCache; public LruCache <String, Bitmap> lruCache; public Context context; // fragmentprivate FragmentManager; private FragmentTransa Ction transaction; private ArticalListFragment articalListFragment; private ForumFragment forumFrgment; private GameFragment gameFragment; public MianActivity () {super () ;}@ define void onCreate (Bundle parent) {super. onCreate (savedInstanceState); getWindow (). requestFeature (Window. FEATURE_PROGRESS); setContentView (R. layout. activity_mian); // 1 initialize the component initComponet (); // 2 initialize frgmentmanager = Getsuppfrfragmentmanager (); initArticalListFragment () ;}@ Overrideprotected void onResume () {// TODO Auto-generated method stubsuper. onResume ();}/*** 1 initialize component ***/private void initComponet () {articlemenu = (Button) this. findViewById (R. id. articalmenu); forummenu = (Button) this. findViewById (R. id. forummenu); gamemenu = (Button) this. findViewById (R. id. gamemenu); articlemenu. setOnClickListener (this); f Orummenu. setOnClickListener (this); gamemenu. setOnClickListener (this);/*** 1 enable the asynchronous task to download data! * Use the Volley framework! * Asynchronous tasks are encapsulated internally! * The adapter can be set only after data is obtained! Custom Adapter ** // GET Request queue context = getApplicationContext (); queue = Volley. newRequestQueue (context); // obtain the system's dynamic residual memory space int memClass = (ActivityManager) context. getSystemService (Context. ACTIVITY_SERVICE )). getMemoryClass (); // get the remaining memory space/8 final int cacheSize = 1024*1024 * memClass/8; // set the cache space size! LruCache = new LruCache <String, Bitmap> (cacheSize); // initialize the image cache! ImageCache = new ImageCache () {public void putBitmap (String url, Bitmap bitmap) {// TODO Auto-generated method stub // set the cache path Log. I (Tag, "--- storing images in the first-level cache"); lruCache. put (url, bitmap); if (ImageCacheSDUtils. getInstance (). getBitmapData (url) = null) {byte [] data = ImageCacheSDUtils. getInstance (). bitmapToByte (bitmap); Log. I (Tag, "--- secondary cache saved to image"); ImageCacheSDUtils. getInstance (). putBitmapData (url, data) ;}} public Bitmap getBitmap (String url) {// TODO Auto-generated method stubLog. I (Tag, "--- level-1 cache fetch image"); Bitmap bitmap = lruCache. get (url); return bitmap; }};}/*** 2 Event Response replace Fragment2 Event Response replace Fragment */@ Overridepublic void onClick (View v) {// TODO Auto-generated method stubtransaction = manager. beginTransaction (); switch (v. getId () {case R. id. articalmenu: if (articalListFragment = null) articalListFragment = n Ew ArticalListFragment (queue, imageCache, lruCache, context); transaction. replace (R. id. contentfragment, articalListFragment, "articalListFragment"); transaction. addToBackStack ("articalListFragment"); break; case R. id. forummenu: if (forumFrgment = null) forumFrgment = new ForumFragment (); transaction. replace (R. id. contentfragment, forumFrgment, "forumFrgment"); transaction. addToBackStack ("forumFrgment"); brea K; case R. id. gamemenu: if (gameFragment = null) gameFragment = new GameFragment (queue, imageCache, lruCache, context); transaction. replace (R. id. contentfragment, gameFragment, "gameFragment"); transaction. addToBackStack ("gameFragment"); break;} // replace fragment! Transaction. commit () ;}// 3 initialize the data when Fragment is loaded for the first time! Public void initArticalListFragment () {transaction = manager. beginTransaction (); articalListFragment = new ArticalListFragment (queue, imageCache, lruCache, context); transaction. add (R. id. contentfragment, articalListFragment, "articalListFragment"); transaction. addToBackStack ("articalListFragment"); // because there is no commit, you cannot show data! Transaction. commit () ;}@ Overridepublic boolean onCreateOptionsMenu (Menu menu) {// Inflate the menu; this adds items to the action bar if it is present. getMenuInflater (). inflate (R. menu. mian, menu); return true ;}}

How does listfragment in fragment achieve the animation effect?

The two are not the same. Import android. app. Fragment; started at 3.0. He added the previous package to the framework layer of the system.

Role of android fragment

Fragment is flexible and provides a better user experience on a tablet. We suggest you try fragment.