由网友(小弟)分享简介：我有2个片段这是从一个活动的操作栏调用。两者都是GridView的，第一个显示用专用适配器的应用程序列表中，并且，第二个显示与另一个适配器的文件列表。我的问题是，当我启动的文件然后当我回到我的活动我切换从一个片段到另一个，我回来的时候到previous之一，它的内容消失。当我旋转的平板电脑我有一些问题，因为我的片段重新...
我有2个片段这是从一个活动的操作栏调用。两者都是GridView的，第一个显示用专用适配器的应用程序列表中，并且，第二个显示与另一个适配器的文件列表。我的问题是，当我启动的文件然后当我回到我的活动我切换从一个片段到另一个，我回来的时候到previous之一，它的内容消失。当我旋转的平板电脑我有一些问题，因为我的片段重新启动，以便为这个我认为删除片段给创建一个新的片段最新的可能性。
我如何管理更新的第一个片段的内容，而从第二个回来了吗？而如何才能重建新的片段行动旋转后删除片段？
：我活动的code是由以下code给出 公共类LaunchActivity延伸活动{ 公共静态活动发射; 私人PagerAdapter mPagerAdapter; 菜单菜单; 公共静态布尔更新=假的; 私有静态最后弦乐TAG =launchactivity; 公共静态字符串路径2; 公共静态的String [] mMenu; 公共静态字符串FILE_NAME =Seconde系列; 公共静态字符串teacher_file =老师; 公共静态字符串newString; 公共静态字符串SESSIONNAME; 公共静态的ArrayList＆LT;串GT; myList中; 私有静态的ArrayList＆LT;串GT;测试; 字符串用户=eleve; 串savedUser; 串模式=正常; 串savedMode; 私人诠释年; 私人诠释月; 私人诠释天; 静态最终诠释DATE_DIALOG_ID = 999; 公共静态布尔有效= FALSE; ////////////////////// OptionsActivity网络=新OptionsActivity（）; 私人ApplicationManager AppManager的; ArrayList的＆LT;串GT;文件=新的ArrayList＆LT;串GT;（）; 私人列表＆LT;串GT; LISTTITLE =新的ArrayList＆LT;串GT;（）; 私人最终的BroadcastReceiver mApplicationsReceiver =新ApplicationsIntentReceiver（）; 私人布尔mHomeDown; 私人布尔mBackDown; 私人动作条动作条; 文件mntFolder =新的文件（到/ mnt /）; 文件[] =外部mntFolder.listFiles（）; 公共静态布尔pause2 = FALSE; 公共静态字符串路径; 公共静态文件fpath; 私人布尔管理员= FALSE; 私人布尔eleve = FALSE; 私人布尔教授= FALSE; /////////////////////// 私有静态最后弦乐TAB_KEY_INDEX =tab_key; / **当第一次创建活动调用。 * / @覆盖 公共无效的onCreate（捆绑savedInstanceState）{ super.onCreate（savedInstanceState）; 的setContentView（R.layout.main1）; LAUNCH =这一点; 如果（savedInstanceState == NULL）{ 捆绑额外= getIntent（）getExtras（）。 如果（演员== NULL）{ newString = NULL; }其他{ newString = extras.getString（preferenceConnector preF_NAME）; } }其他{ newString =（字符串）savedInstanceState.getSerializable（preferenceConnector preF_NAME）; } // Log.i（** ---- ----测试保存的值**，newString）; 如果（newString！= NULL）{ newString = newString.substring（1，（newString.length（） - 1））; ArrayList的＆LT;串GT; SLIST =新的ArrayList＆LT;串GT;（Arrays.asList（newString.split（）））; myList中=新的ArrayList＆LT;串GT;（Arrays.asList（newString.split（）））; 串V =; myList.add（0，v.concat（sList.get（0）））; myList.add（0，sList.get（0）.concat（ⅴ））; ///////试试这个，以获得良好的尺寸/////////////////////////////// 的for（int i = 0; I＆LT; myList.size（）;我++）{ Log.i（------＆GT; L'元素n+将String.valueOf（I），myList.get（I））; } } 如果（savedInstanceState！= NULL）{ savedUser = savedInstanceState.getString（文本）; savedMode = savedInstanceState.getString（MODE）; 字符串str; 海峡= savedInstanceState.getString（ListActivity）; 测试= savedInstanceState.getStringArrayList（目录）; // myList中=（ArrayList的＆LT;串GT;）Arrays.asList（str.split（\ S *，\ S *））; }其他{ savedUser =eleve; savedMode =正常; } //Log.d("savedUser，savedUser）; //Log.d("savedMode，savedMode）; //动作条 动作条= getActionBar（）; actionbar.setNavigationMode（ActionBar.NAVIGATION_MODE_TABS）; actionbar.setDisplayUseLogoEnabled（假）; actionbar.setDisplayShowTitleEnabled（假）; //创建新的选项卡，并和设置选项卡的标题 ActionBar.Tab mFindTab = actionbar.newTab（）的setText（ 的getString（R.string.ui_tabname_find））; ActionBar.Tab mChatTab = actionbar.newTab（）的setText（ 的getString（R.string.ui_tabname_chat））; ActionBar.Tab mMeetTab = actionbar.newTab（）的setText（ 的getString（R.string.ui_tabname_meet））; ActionBar.Tab mPartyTab = actionbar.newTab（）的setText（ 的getString（R.string.ui_tabname_find））; //创建片段 片段mMeetFragment =新ApplicatinFragment（）; 片段mFindFragment =新MatFragment（）; 片段mChatFragment =新DocumentFragment1（）; 片段mPartyFragment =新PartyFragment（）; //绑定片段选项卡 - 设置tabListeners为每个标签 mFindTab.setTabListener（新MyTabsListener（mFindFragment， getApplicationContext（）））; mChatTab.setTabListener（新MyTabsListener（mChatFragment， getApplicationContext（）））; mMeetTab.setTabListener（新MyTabsListener（mMeetFragment， getApplicationContext（）））;// mPartyTab.setTabListener（新MyTabsListener（mPartyFragment，// getApplicationContext（）））; //标签添加到操作杆 actionbar.addTab（mMeetTab）; actionbar.addTab（mFindTab）; 如果（savedInstanceState！= NULL）{ // Toast.makeText（getApplicationContext（）， //选项卡+ savedInstanceState.getInt（TAB_KEY_INDEX，0）， // Toast.LENGTH_SHORT）.show（）; actionbar.setSelectedNavigationItem（savedInstanceState.getInt（ TAB_KEY_INDEX，0））; } } 公共无效onResume（）{ this.stopService（新意图（这一点，fr.mi.DetectorService.class））; 意图startService =新意图（这一点，fr.mi.DetectorService.class）; this.startService（startService）; 如果（fr.mi.LockScreenActivity.LOCK！= NULL）{ fr.mi.LockScreenActivity.LOCK.finish（）; } Log.i（onResume，onResume（））; 如果（AppList.ac！= NULL）{ AppList.ac.finish（）; } //Toast.makeText(thisonResume（），Toast.LENGTH_LONG）.show（）; super.onResume（）; } @覆盖公共无效的onPause（）{ super.onPause（）; //始终首先调用父类的方法} 公共无效的onDestroy（）{ super.onStop（）; // tToast（的onDestroy。）; } 私有类ApplicationsIntentReceiver扩展广播接收器{ @覆盖 公共无效的onReceive（上下文的背景下，意图意图）{ Toast.makeText（getApplicationContext（），测试+本，Toast.LENGTH_LONG）.show（）; appManager.loadApplications（假）; } } @覆盖 保护无效的onSaveInstanceState（捆绑outState）{ super.onSaveInstanceState（outState）; / * Toast.makeText（ 这个， 的onSaveInstanceState：选项卡 + getActionBar（）。getSelectedNavigationIndex（）， Toast.LENGTH_SHORT）.show（）; * / outState.putStringArrayList（列表，LaunchActivity.myList）; outState.putString（ListActivity，LaunchActivity.myList.toString（））; } 私人无效registerIntentReceivers（）{ IntentFilter的过滤器=新的IntentFilter（Intent.ACTION_PACKAGE_ADDED）; filter.addAction（Intent.ACTION_PACKAGE_REMOVED）; filter.addAction（Intent.ACTION_PACKAGE_CHANGED）; filter.addDataScheme（包）; registerReceiver（mApplicationsReceiver，过滤器）; }}类MyTabsListener实现ActionBar.TabListener { 公共片段片段; 公共上下文的背景下; 公共MyTabsListener（片段片段，上下文的背景下）{ this.fragment =片段; this.context =背景; } @覆盖 公共无效onTabReselected（标签选项卡，FragmentTransaction英尺）{ // Toast.makeText（上下文中，复选！，Toast.LENGTH_SHORT）.show（）; } @覆盖 公共无效onTabSelected（标签选项卡，FragmentTransaction英尺）{ //Toast.makeText(context评选！，Toast.LENGTH_SHORT）.show（）; ft.replace（R.id.fragment_container，片段）; } @覆盖 公共无效onTabUnselected（标签选项卡，FragmentTransaction英尺）{ //Toast.makeText(context！未选定Toast.LENGTH_SHORT）.show（）; ft.remove（片段）; }} 我使用一个GridView查看安装的应用程序第一个片段。由以下code给出：
公共类ApplicatinFragment扩展片段{ TextView的称号; 私有静态ApplicationManager AppManager的; 菜单菜单; 公共静态布尔更新=假的; 私有静态最后弦乐TAG =launchactivity; 公共静态字符串路径; 公共静态的String [] mMenu; 公共静态字符串FILE_NAME =Seconde系列; 公共静态字符串teacher_file =老师; //私有静态最后弦乐preF_APPLICATION_LIST =application_list; // OptionsActivity网络=新OptionsActivity（）; 私有静态最后弦乐preF_SERVICE_ENABLED =service_enabled; 私有静态最后弦乐preF_APPLICATION_LIST =application_list; 私有静态最后弦乐preF_APPLICATION_LIST1 =application_list1; 私有静态最后弦乐preF_APPLICATION_LISTPROF =application_list_prof; 私有静态最后弦乐preF_AUTO_START =start_service_after_boot; 私有静态最后弦乐preF_PASSWORD =密码; 私有静态最后弦乐preF_UNIVERSEL_PASSWORD =universelpassword; 公共静态布尔SBACKSTUCK = FALSE; 私人共享preferences米preF; 私人布尔mServiceEnabled，mAutoStart; 公共静态的String [] mApplicationList; 私有String [] mApplicationList1; 私有String [] mApplicationListProf; 公共静态字符串mPassword; 私人字符串mUniverselPassword; 私人诠释mRelockTimeout; 私人最终的BroadcastReceiver mApplicationsReceiver =新ApplicationsIntentReceiver（）; GridView控件GridView控件; ArrayList的＆LT;串GT;文件=新的ArrayList＆LT;串GT;（）; 私有静态GridViewAppInfoAdapter适配器; @覆盖 公共无效的onCreate（捆绑savedInstanceState）{ super.onCreate（savedInstanceState）; Log.i（PageAdminFragment，的onCreate）; AppManager的=新ApplicationManager（getActivity（），getActivity（） .getPackageManager（），LaunchActivity.myList）; appManager.loadApplications（真）; registerIntentReceivers（）; 适配器=新GridViewAppInfoAdapter（getActivity（） appManager.getStudentApplications code（））; 共享preferences共享preferences = preferenceManager.getDefaultShared preferences（getActivity（））; 共享preferences.Editor编辑=共享preferences.edit（）;// mApplicationList = M pref.getString（preF_APPLICATION_LIST，）.split（）; 串组合=; 合并的=合并的+com.android.vending+，; 合并的=合并的+com.android.settings+，; 合并的=合并的+com.android.packageinstaller+， ; //合并= +综合air.Arbres 的for（int i = 0; I＆LT; SessionChoose.ProtectedApplication.size（）;我++）{ 合并的=合并的+ SessionChoose.ProtectedApplication.toString（）+; ; } Log.d（ - * - * LES应用proteger - * - *，合并）; //Toast.makeText(getActivity(),"-*-*les应用proteger - * - *+结合，Toast.LENGTH_LONG）.show（）; // editor.putString（preF_APPLICATION_LIST，合并）.commit（）; //加载preferences（getActivity（））; //Toast.makeText(getApplicationContext(),"$p$pF_APPLICATION_LIST+ strSavedMem2，Toast.LENGTH_LONG）.show（）; // SaveApplication preferences（preF_APPLICATION_LIST，strSavedMem2，ProtectedApplication，getApplicationContext（））; //加载preferences（getActivity（））; //Toast.makeText(getApplicationContext(),"$p$pF_APPLICATION_LIST+ strSavedMem2，Toast.LENGTH_LONG）.show（）; //加载preferences（getActivity（））; / ** *科瑞文件来保存会话内容 * / 。this.getActivity（）getApplicationContext（）stopService（新意图（this.getActivity（），fr.mi.DetectorService.class））; //getActivity().stopService(new意图（this.getActivity（），fr.mi.DetectorService.class））; } @覆盖 公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup， 捆绑savedInstanceState）{ //Toast.makeText（getActivity（），我需要好适配器，Toast.LENGTH_SHORT）.show（）; Log.d（TAG，appManager.getStudentApplications（）的toString（））; INT display_mode = getResources（）getConfiguration（）方向。; 查看查看= NULL; ////////////////////////////////////////////////// /////////////////////////// 如果（display_mode == 1）{ 鉴于= inflater.inflate（R.layout.main_grid， 集装箱，FALSE）; // this.getWindow（）。setFlags（ // WindowManager.LayoutParams.FLAG_FULLSCREEN， // WindowManager.LayoutParams.FLAG_FULLSCREEN）; // this.getWindow（）clearFlags（WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON）; GridView控件=（GridView控件）view.findViewById（R.id.gridview）; // MGRID =（GridView控件）findViewById（R.id.gridview）; gridView.setColumnWidth（95）; // mGrid.setSystemUiVisibility（View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION）; }其他{ 鉴于= inflater.inflate（R.layout.main_grid_land， 集装箱，FALSE）; // this.getWindow（）。setFlags（ // WindowManager.LayoutParams.FLAG_FULLSCREEN， // WindowManager.LayoutParams.FLAG_FULLSCREEN）; //setContentView(R.layout.main_grid_land）; GridView控件=（GridView控件）view.findViewById（R.id.gridview1）; gridView.setColumnWidth（95）; Log.d（模式，土地）; // mGrid.setSystemUiVisibility（View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION）; } gridView.setAdapter（适配器）; gridView.setSelection（0）; /////////////尝试这个 /////////////////////// 共享preferences共享preferences = preferenceManager.getDefaultShared preferences（this.getActivity（）getApplicationContext（））; 共享preferences.Editor编辑=共享preferences.edit（）; gridView.setOnItemClickListener（（新OnItemClickListener（）{ 上派河畔L'项目// SI @覆盖 公共无效onItemClick（适配器视图＆LT;＆GT;母公司，视图V， INT位置，长的id）{ ApplicationInfo应用=（ApplicationInfo）父 .getItemAtPosition（位置）; startActivity（app.intent）; } }））; 如果（ViewPagerActivity.VIEWDOC ==真）{ 意向意图=新的Intent（）; intent.addFlags（Intent.FLAG_ACTIVITY_NO_ANIMATION）; intent.setClass（getActivity（），LaunchActivity.class）; startActivity（意向）; } 意图startService =新意图（this.getActivity（）getApplicationContext（），fr.mi.DetectorService.class。）; 。getActivity（）startService（startService）; ViewPagerActivity.VIEWDOC = FALSE; 返回视图。 } 私人无效bindApplications（LayoutInflater充气器，容器的ViewGroup）{ 查看查看= inflater.inflate（R.layout.main_grid， 集装箱，FALSE）; 如果（GridView控件== NULL）{ GridView控件=（GridView控件）view.findViewById（R.id.gridview）; } 适配器=新GridViewAppInfoAdapter（getActivity（） appManager.getStudentApplications code（））; adapter.notifyDataSetChanged（）; gridView.setAdapter（适配器）; gridView.setSelection（0）; } 私人无效registerIntentReceivers（）{ IntentFilter的过滤器=新的IntentFilter（Intent.ACTION_PACKAGE_ADDED）; filter.addAction（Intent.ACTION_PACKAGE_REMOVED）; filter.addAction（Intent.ACTION_PACKAGE_CHANGED）; filter.addDataScheme（包）; 。getActivity（）registerReceiver（mApplicationsReceiver，过滤器）; } @覆盖 公共无效的onStop（）{ super.onStop（）; Log.i（TAG的onStop）; } @覆盖 公共无效的onDestroy（）{ Log.i（TAGOnsdESTROY）; super.onDestroy（）; } @覆盖 公共无效onResume（）{ Log.i（TAGOnResume）; super.onResume（）; } 私人无效重装preferences（）{ mServiceEnabled = M pref.getBoolean（preF_SERVICE_ENABLED，FALSE）; mApplicationList = M pref.getString（preF_APPLICATION_LIST，）.split（）; mApplicationList1 = M pref.getString（preF_APPLICATION_LIST1，）.split（）; mApplicationListProf = M pref.getString（preF_APPLICATION_LISTPROF，）分裂。（）; //Log.d("**************La清单当然DES应用proteger ***********，mApplicationList.toString（））; Log.i（+ - + - + - + - + - ***截尾*** ++++++++++，mApplicationList.toString（））; mAutoStart = M pref.getBoolean（preF_AUTO_START，FALSE）; mPassword = M pref.getString（preF_PASSWORD，2492）; mUniverselPassword = M pref.getString（preF_UNIVERSEL_PASSWORD，9113）; 如果（M pref.getBoolean（relock_policy，真））{ 尝试{ mRelockTimeout =的Integer.parseInt（M pref.getString（relock_timeout， - 1））; }赶上（例外五）{ mRelockTimeout = -1; } }其他{ mRelockTimeout = -1; } } / ** *接收添加应用程序时/删除通知。 * / 私有类ApplicationsIntentReceiver扩展广播接收器{ LayoutInflater吹气; 集装箱的ViewGroup; 公共ApplicationsIntentReceiver（）{ } / *公共ApplicationsIntentReceiver（LayoutInflater充气器，容器的ViewGroup）{ this.inflater =吹气; this.container =容器; } * / @覆盖 公共无效的onReceive（上下文的背景下，意图意图）{ // =的AppManager新ApplicationManager（getActivity（），getActivity（） // getPackageManager（），NULL）; SBACKSTUCK =真; appManager.loadApplications（假）; // gridView.setAdapter（NULL）; // GridViewAppInfoAdapter适配器1 =新GridViewAppInfoAdapter（getActivity（） // appManager.getStudentApplications code（））; //adapter1.setApps((List<ApplicationInfo>）appManager.getStudentApplications code（））; //gridView.setAdapter(adapter1）; // Toast.makeText（getActivity（），拉valeur+ LaunchActivity.myList.toString（），Toast.LENGTH_LONG）.show（）; Log.d（香格里拉valeur德拉名单，LaunchActivity.myList.toString（））; //适配器=新GridViewAppInfoAdapter（getActivity（） // appManager.getStudentApplications code（））; bindApplications（吹气，集装箱）; } } ////实现绑定应用程序 私人无效bindApplications（适配器视图＆LT;＆GT;母公司，INT位置）{ ApplicationInfo应用=（ApplicationInfo）父 .getItemAtPosition（位置）; startActivity（app.intent）; } // /////////////////////////////////////////////// / ** *启动网格视图中选定活动/应用。 * / 私有类ApplicationLauncher工具 AdapterView.OnItemClickListener { @覆盖 公共无效onItemClick（适配器视图父母，视图V，INT位置， 长ID）{ ApplicationInfo应用=（ApplicationInfo）父 .getItemAtPosition（位置）; startActivity（app.intent）; } } // ////////////////////////////////////////////// 公共布尔的onkeydown（INT K，KeyEvent的EV）{ 返回false; } 公共无效onBack pressed（）{ 意向意图=新的Intent（）; intent.setAction（Intent.ACTION_MAIN）.addCategory（Intent.CATEGORY_HOME） .addFlags（Intent.FLAG_ACTIVITY_CLEAR_TOP）; startActivity（意向）; //完成（）; }} 第二个片段是用来查看文件的GridView控件是由下面的code给出：
公共类MatFragment扩展片段{ 私人GridViewAjoutFile适配器; 私人GridViewAjoutFile ajout =新GridViewAjoutFile（）; 公共静态布尔continuer = FALSE; 公共静态GridviewAdapter mAdapter; 公共静态的ArrayList＆LT;串GT; listCountry =新的ArrayList＆LT;串GT;（）; 公共静态的ArrayList＆LT;整数GT; listFlag =新的ArrayList＆LT;整数GT;（）; 私人的ArrayList＆LT;串GT; intentType; 私人GridView控件GridView控件; 私人字符串mStackLevel =; @覆盖 公共无效的onCreate（捆绑savedInstanceState）{ super.onCreate（savedInstanceState）; } @覆盖 公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup， 捆绑savedInstanceState）{ 最终的ArrayList＆LT;串GT; profilTabShortCut; 查看查看= inflater.inflate（R.layout.maindoc， 集装箱，FALSE）; 如果（savedInstanceState！= NULL）{ mStackLevel = savedInstanceState.getString（级别）; } prepareList（）; mAdapter =新GridviewAdapter（getActivity（），listCountry，listFlag）; //mAdapter.setFile(listCountry，listFlag）; GridView控件=（GridView控件）view.findViewById（R.id.gridView2）; //gridView.setAdapter(null）; gridView.setAdapter（mAdapter）; //落实项目点击监听器 gridView.setOnItemClickListener（新AdapterView.OnItemClickListener（） { @覆盖 公共无效onItemClick（适配器视图＆LT;＆GT;为arg0，ARG1查看，INT位置， 长ARG3）{SetIntentType（SessionChoose.listofUrl.get（位置），intentType.get（位置））; } }）; 返回视图。 } @覆盖 公共无效的onSaveInstanceState（捆绑outState）{ super.onSaveInstanceState（outState）; outState.putString（级别，listCountry.toString（））; } @覆盖 公共无效onResume（）{ Log.e（调试，LoginFragment的onResume）; listCountry = removeDuplicate（listCountry）; // listFlag = removeDuplicate1（listFlag）; super.onResume（）; } 公共静态的ArrayList＆LT;串GT; removeDuplicate（ArrayList的＆LT;串GT; arlList）{ HashSet的H =新的HashSet（arlList）; arlList.clear（）; arlList.addAll（H）; 返回arlList; } 公共静态的ArrayList＆LT;整数GT; removeDuplicate1（ArrayList的＆LT;整数GT; arlList）{ HashSet的H =新的HashSet（arlList）; arlList.clear（）; arlList.addAll（H）; 返回arlList; } 公共意向SetIntentType（URL字符串，字符串intenttype）{ 意向意图=新的Intent（）; intent.setAction（android.content.Intent.ACTION_VIEW）; 返回null; } 公共无效prepareList（） {intentType =新的ArrayList＆LT;串GT;（）; listCountry.clear（）; listFlag.clear（）; 如果（SessionChoose.listofDoc.size（）大于0）{ 的for（int i = 0; I＆LT; SessionChoose.listofDoc.size（）;我++）{ listCountry.add（SessionChoose.listofDoc.get（I））; 串filenameArray [] = SessionChoose.listofDoc.get（ⅰ）.split（\。）; 字符串延长= filenameArray [filenameArray.length-1]; } @覆盖 公共无效setUserVisibleHint（布尔isVisibleToUser） { super.setUserVisibleHint（isVisibleToUser）; 如果（isVisibleToUser）{ } } 私有类ApplicationsIntentReceiver扩展广播接收器{ @覆盖 公共无效的onReceive（上下文的背景下，意图意图）{ // appManager.loadApplications（假）; //意图INTE =新意图（getActivity（），LauncherGridActivity.class）; // startActivity（INTE）; } }} 解决方案
您可以使用 -
@覆盖 公共无效setUserVisibleHint（布尔isVisibleToUser） { super.setUserVisibleHint（isVisibleToUser）; 如果（isVisibleToUser）{ } } I have 2 fragments which are called from the action bar of an activity. Both are gridviews, the first one displays an application list with a dedicated adapter, and the second one displays a file list with another adapter. My problem is that when I launch a file then when I back to my activity I switch from one fragment to another, when I come back to the previous one, its content disappears. And when I rotate tablet I have the some problem, because my Fragment restart so for this I think that removing fragment give the possibility to create a new Fragment up to date.
How can I manage to update the content of the first fragment while coming back from the second one ? And how to remove fragment after the rotation in order to recreate the Action with new Fragment? the code of my Activity is given by the code below:
public class LaunchActivity extends Activity {
public static Activity LAUNCH;
private PagerAdapter mPagerAdapter;
Menu menu;
public static boolean updated = false;
private static final String TAG = "launchactivity";
public static String Path2;
public static String[] mMenu;
public static String file_name = "seconde";
public static String teacher_file = "teacher";
public static String newString;
public static String SESSIONNAME;
public static ArrayList<String> myList;
private static ArrayList<String> test;
String user = "eleve";
String savedUser;
String mode = "normal";
String savedMode;
private int year;
private int month;
private int day;
static final int DATE_DIALOG_ID = 999;
public static boolean active = false;
////////////////////
// OptionsActivity fi = new OptionsActivity();
private ApplicationManager appManager;
ArrayList<String> files = new ArrayList<String>();
private List<String> listTitle = new ArrayList<String>();
private final BroadcastReceiver mApplicationsReceiver = new ApplicationsIntentReceiver();
private boolean mHomeDown;
private boolean mBackDown;
private ActionBar actionbar ;
File mntFolder = new File("/mnt/");
File[] external = mntFolder.listFiles();
public static boolean pause2=false;
public static String path;
public static File fpath;
private boolean admin = false;
private boolean eleve = false;
private boolean prof = false;
///////////////////////
private static final String TAB_KEY_INDEX = "tab_key";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main1);
LAUNCH = this;
if (savedInstanceState == null) {
Bundle extras = getIntent().getExtras();
if(extras == null) {
newString= null;
} else {
newString= extras.getString(PreferenceConnector.PREF_NAME);
}
} else {
newString= (String) savedInstanceState.getSerializable(PreferenceConnector.PREF_NAME);
}
// Log.i("**----test----saved value**" , newString);
if(newString != null){
newString = newString.substring(1 , (newString.length()-1));
ArrayList<String> sList = new ArrayList<String>(Arrays.asList(newString.split(",")));
myList = new ArrayList<String>(Arrays.asList(newString.split(", ")));
String v = " ";
myList.add(0, v.concat(sList.get(0)));
myList.add(0, sList.get(0).concat(v));
/////// try this in order to get the good size///////////////////////////////
for(int i= 0 ; i< myList.size() ; i++){
Log.i("------> l'element n " + String.valueOf(i),myList.get(i));
}
}
if (savedInstanceState != null) {
savedUser = savedInstanceState.getString("TEXT");
savedMode = savedInstanceState.getString("MODE");
String str;
str = savedInstanceState.getString("ListActivity");
test = savedInstanceState.getStringArrayList("List");
// myList = (ArrayList<String>) Arrays.asList(str.split("s*,s*"));
} else {
savedUser = "eleve";
savedMode = "normal";
}
//Log.d("savedUser", savedUser);
//Log.d("savedMode", savedMode);
// ActionBar
actionbar = getActionBar();
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionbar.setDisplayUseLogoEnabled(false);
actionbar.setDisplayShowTitleEnabled(false) ;
// create new tabs and and set up the titles of the tabs
ActionBar.Tab mFindTab = actionbar.newTab().setText(
getString(R.string.ui_tabname_find));
ActionBar.Tab mChatTab = actionbar.newTab().setText(
getString(R.string.ui_tabname_chat));
ActionBar.Tab mMeetTab = actionbar.newTab().setText(
getString(R.string.ui_tabname_meet));
ActionBar.Tab mPartyTab = actionbar.newTab().setText(
getString(R.string.ui_tabname_find));
// create the fragments
Fragment mMeetFragment = new ApplicatinFragment();
Fragment mFindFragment = new MatFragment();
Fragment mChatFragment = new DocumentFragment1();
Fragment mPartyFragment = new PartyFragment();
// bind the fragments to the tabs - set up tabListeners for each tab
mFindTab.setTabListener(new MyTabsListener(mFindFragment,
getApplicationContext()));
mChatTab.setTabListener(new MyTabsListener(mChatFragment,
getApplicationContext()));
mMeetTab.setTabListener(new MyTabsListener(mMeetFragment,
getApplicationContext()));
// mPartyTab.setTabListener(new MyTabsListener(mPartyFragment,
// getApplicationContext()));
// add the tabs to the action bar
actionbar.addTab(mMeetTab);
actionbar.addTab(mFindTab);
if (savedInstanceState != null) {
// Toast.makeText(getApplicationContext(),
// "tab is " + savedInstanceState.getInt(TAB_KEY_INDEX, 0),
// Toast.LENGTH_SHORT).show();
actionbar.setSelectedNavigationItem(savedInstanceState.getInt(
TAB_KEY_INDEX, 0));
}
}
public void onResume() {
this.stopService(new Intent(this, fr.mi.DetectorService.class));
Intent startService = new Intent(this, fr.mi.DetectorService.class);
this.startService(startService);
if(fr.mi.LockScreenActivity.LOCK != null){
fr.mi.LockScreenActivity.LOCK.finish();
}
Log.i("onResume", "onResume()");
if (AppList.ac != null) {
AppList.ac.finish();
}
//Toast.makeText(this, "onResume()", Toast.LENGTH_LONG).show();
super.onResume();
}
@Override
public void onPause() {
super.onPause(); // Always call the superclass method first
}
public void onDestroy() {
super.onStop();
// tToast("onDestroy.");
}
private class ApplicationsIntentReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(getApplicationContext(), "test" + "this" , Toast.LENGTH_LONG).show();
appManager.loadApplications(false);
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
/*
Toast.makeText(
this,
"onSaveInstanceState: tab is"
+ getActionBar().getSelectedNavigationIndex(),
Toast.LENGTH_SHORT).show(); */
outState.putStringArrayList("List",LaunchActivity.myList);
outState.putString("ListActivity", LaunchActivity.myList.toString());
}
private void registerIntentReceivers() {
IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
filter.addDataScheme("package");
registerReceiver(mApplicationsReceiver, filter);
}
}
class MyTabsListener implements ActionBar.TabListener {
public Fragment fragment;
public Context context;
public MyTabsListener(Fragment fragment, Context context) {
this.fragment = fragment;
this.context = context;
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// Toast.makeText(context, "Reselected!", Toast.LENGTH_SHORT).show();
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
//Toast.makeText(context, "Selected!", Toast.LENGTH_SHORT).show();
ft.replace(R.id.fragment_container, fragment);
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
//Toast.makeText(context, "Unselected!", Toast.LENGTH_SHORT).show();
ft.remove(fragment);
}
}
My first Fragment used to view installed application in a gridView. is given by the code below:
public class ApplicatinFragment extends Fragment {
TextView title;
private static ApplicationManager appManager;
Menu menu;
public static boolean updated = false;
private static final String TAG = "launchactivity";
public static String Path;
public static String[] mMenu;
public static String file_name = "seconde";
public static String teacher_file = "teacher";
//private static final String PREF_APPLICATION_LIST = "application_list";
//OptionsActivity fi = new OptionsActivity();
private static final String PREF_SERVICE_ENABLED = "service_enabled";
private static final String PREF_APPLICATION_LIST = "application_list";
private static final String PREF_APPLICATION_LIST1 = "application_list1";
private static final String PREF_APPLICATION_LISTPROF = "application_list_prof";
private static final String PREF_AUTO_START = "start_service_after_boot";
private static final String PREF_PASSWORD = "password";
private static final String PREF_UNIVERSEL_PASSWORD = "universelpassword";
public static boolean SBACKSTUCK = false ;
private SharedPreferences mPref;
private boolean mServiceEnabled, mAutoStart;
public static String[] mApplicationList;
private String[] mApplicationList1;
private String[] mApplicationListProf;
public static String mPassword;
private String mUniverselPassword;
private int mRelockTimeout;
private final BroadcastReceiver mApplicationsReceiver = new ApplicationsIntentReceiver();
GridView gridView;
ArrayList<String> files = new ArrayList<String>();
private static GridViewAppInfoAdapter adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i("PageAdminFragment", "onCreate");
appManager = new ApplicationManager(getActivity(), getActivity()
.getPackageManager(),LaunchActivity.myList);
appManager.loadApplications(true);
registerIntentReceivers();
adapter = new GridViewAppInfoAdapter(getActivity(),
appManager.getStudentApplicationsCode());
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
SharedPreferences.Editor editor = sharedPreferences.edit();
// mApplicationList = mPref.getString(PREF_APPLICATION_LIST, "").split(";");
String combined = "";
combined = combined + "com.android.vending" + ";";
combined = combined + "com.android.settings" + ";";
combined = combined + "com.android.packageinstaller" + ";" ;
//combined = combined + "air.Arbres";
for( int i = 0; i < SessionChoose.ProtectedApplication.size(); i++){
combined = combined + SessionChoose.ProtectedApplication.toString() + ";" ;
}
Log.d("-*-*les applications à proteger-*-*", combined);
//Toast.makeText(getActivity(),"-*-*les applications à proteger-*-*"+ combined,Toast.LENGTH_LONG).show();
// editor.putString(PREF_APPLICATION_LIST, combined).commit();
// LoadPreferences(getActivity());
//Toast.makeText(getApplicationContext(),"PREF_APPLICATION_LIST " + strSavedMem2 , Toast.LENGTH_LONG ).show();
// SaveApplicationPreferences(PREF_APPLICATION_LIST,strSavedMem2 ,ProtectedApplication,getApplicationContext());
//LoadPreferences(getActivity());
//Toast.makeText(getApplicationContext(),"PREF_APPLICATION_LIST " + strSavedMem2 , Toast.LENGTH_LONG ).show();
//LoadPreferences(getActivity());
/**
* Creat file to save session Content
*/
this.getActivity().getApplicationContext().stopService(new Intent(this.getActivity(), fr.mi.DetectorService.class));
//getActivity().stopService(new Intent(this.getActivity(), fr.mi.DetectorService.class));
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//Toast.makeText(getActivity(), "I need the good Adapter", Toast.LENGTH_SHORT).show();
Log.d(TAG, appManager.getStudentApplications().toString());
int display_mode = getResources().getConfiguration().orientation;
View view = null;
/////////////////////////////////////////////////////////////////////////////
if (display_mode == 1) {
view = inflater.inflate(R.layout.main_grid,
container, false);
// this.getWindow().setFlags(
// WindowManager.LayoutParams.FLAG_FULLSCREEN,
// WindowManager.LayoutParams.FLAG_FULLSCREEN);
// this.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
gridView = (GridView) view.findViewById(R.id.gridview);
//mGrid = (GridView) findViewById(R.id.gridview);
gridView.setColumnWidth(95);
// mGrid.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
} else {
view = inflater.inflate(R.layout.main_grid_land,
container, false);
// this.getWindow().setFlags(
// WindowManager.LayoutParams.FLAG_FULLSCREEN,
// WindowManager.LayoutParams.FLAG_FULLSCREEN);
//setContentView(R.layout.main_grid_land);
gridView = (GridView) view.findViewById(R.id.gridview1);
gridView.setColumnWidth(95);
Log.d("Mode", "land");
// mGrid.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
}
gridView.setAdapter(adapter);
gridView.setSelection(0);
/////////////try this ///////////////////////
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this.getActivity().getApplicationContext());
SharedPreferences.Editor editor = sharedPreferences.edit();
gridView.setOnItemClickListener((new OnItemClickListener() {
// si on clique sur l'item
@Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
ApplicationInfo app = (ApplicationInfo) parent
.getItemAtPosition(position);
startActivity(app.intent);
}
}));
if(ViewPagerActivity.VIEWDOC == true ){
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
intent.setClass(getActivity(), LaunchActivity.class);
startActivity(intent);
}
Intent startService = new Intent(this.getActivity().getApplicationContext(), fr.mi.DetectorService.class);
getActivity().startService(startService);
ViewPagerActivity.VIEWDOC = false ;
return view;
}
private void bindApplications(LayoutInflater inflater, ViewGroup container) {
View view = inflater.inflate(R.layout.main_grid,
container, false);
if (gridView == null) {
gridView = (GridView) view.findViewById(R.id.gridview);
}
adapter = new GridViewAppInfoAdapter(getActivity(),
appManager.getStudentApplicationsCode());
adapter.notifyDataSetChanged();
gridView.setAdapter(adapter);
gridView.setSelection(0);
}
private void registerIntentReceivers() {
IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_ADDED);
filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
filter.addDataScheme("package");
getActivity().registerReceiver(mApplicationsReceiver, filter);
}
@Override
public void onStop() {
super.onStop();
Log.i(TAG, "Onstop");
}
@Override
public void onDestroy() {
Log.i(TAG, "OnsdESTROY");
super.onDestroy();
}
@Override
public void onResume() {
Log.i(TAG, "OnResume");
super.onResume();
}
private void reloadPreferences() {
mServiceEnabled = mPref.getBoolean(PREF_SERVICE_ENABLED, false);
mApplicationList = mPref.getString(PREF_APPLICATION_LIST, "").split(";");
mApplicationList1 = mPref.getString(PREF_APPLICATION_LIST1, "").split(";");
mApplicationListProf = mPref.getString(PREF_APPLICATION_LISTPROF,"").split(";");
//Log.d("**************La Liste des applications à proteger***********", mApplicationList.toString());
Log.i("+-+-+-+-+- ***Censored***++++++++++", mApplicationList.toString() );
mAutoStart = mPref.getBoolean(PREF_AUTO_START, false);
mPassword = mPref.getString(PREF_PASSWORD, "2492");
mUniverselPassword = mPref.getString(PREF_UNIVERSEL_PASSWORD , "9113");
if (mPref.getBoolean("relock_policy", true)){
try{
mRelockTimeout = Integer.parseInt(mPref.getString("relock_timeout", "-1"));
}catch(Exception e){
mRelockTimeout = -1;
}
}else{
mRelockTimeout = -1;
}
}
/**
* Receives notifications when applications are added/removed.
*/
private class ApplicationsIntentReceiver extends BroadcastReceiver {
LayoutInflater inflater;
ViewGroup container ;
public ApplicationsIntentReceiver(){
}
/* public ApplicationsIntentReceiver(LayoutInflater inflater, ViewGroup container){
this.inflater = inflater ;
this.container = container ;
}*/
@Override
public void onReceive(Context context, Intent intent) {
// appManager = new ApplicationManager(getActivity(), getActivity()
//.getPackageManager(), null);
SBACKSTUCK = true;
appManager.loadApplications(false);
// gridView.setAdapter(null);
//GridViewAppInfoAdapter adapter1 = new GridViewAppInfoAdapter(getActivity(),
// appManager.getStudentApplicationsCode());
//adapter1.setApps((List<ApplicationInfo>) appManager.getStudentApplicationsCode());
//gridView.setAdapter(adapter1);
// Toast.makeText(getActivity(), "la valeur" + LaunchActivity.myList.toString() , Toast.LENGTH_LONG).show();
Log.d("la valeur de la list" ,LaunchActivity.myList.toString() );
//adapter = new GridViewAppInfoAdapter(getActivity(),
// appManager.getStudentApplicationsCode());
bindApplications( inflater , container);
}
}
////implement the bind Application
private void bindApplications(AdapterView<?> parent, int position){
ApplicationInfo app = (ApplicationInfo) parent
.getItemAtPosition(position);
startActivity(app.intent);
}
// ///////////////////////////////////////////////
/**
* Starts the selected activity/application in the grid view.
*/
private class ApplicationLauncher implements
AdapterView.OnItemClickListener {
@Override
public void onItemClick(AdapterView parent, View v, int position,
long id) {
ApplicationInfo app = (ApplicationInfo) parent
.getItemAtPosition(position);
startActivity(app.intent);
}
}
// //////////////////////////////////////////////
public boolean onKeyDown(int k, KeyEvent ev) {
return false;
}
public void onBackPressed() {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME)
.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
// finish();
}
}
The second fragment is used to view a gridview of file is given by the code below:
public class MatFragment extends Fragment {
private GridViewAjoutFile adapter;
private GridViewAjoutFile ajout = new GridViewAjoutFile();
public static boolean continuer = false;
public static GridviewAdapter mAdapter ;
public static ArrayList<String> listCountry = new ArrayList<String>();
public static ArrayList<Integer> listFlag = new ArrayList<Integer>();
private ArrayList<String> intentType;
private GridView gridView;
private String mStackLevel = " ";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final ArrayList<String> profilTabShortCut;
View view = inflater.inflate(R.layout.maindoc,
container, false);
if (savedInstanceState != null) {
mStackLevel = savedInstanceState.getString("level");
}
prepareList();
mAdapter = new GridviewAdapter(getActivity(),listCountry, listFlag);
//mAdapter.setFile(listCountry , listFlag);
gridView = (GridView) view.findViewById(R.id.gridView2);
//gridView.setAdapter(null);
gridView.setAdapter(mAdapter);
// Implement On Item click listener
gridView.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) { SetIntentType(SessionChoose.listofUrl.get(position),intentType.get(position));
}
});
return view;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("level", listCountry.toString());
}
@Override
public void onResume() {
Log.e("DEBUG", "onResume of LoginFragment");
listCountry = removeDuplicate(listCountry);
//listFlag = removeDuplicate1(listFlag);
super.onResume();
}
public static ArrayList<String> removeDuplicate(ArrayList<String> arlList) {
HashSet h = new HashSet(arlList);
arlList.clear();
arlList.addAll(h);
return arlList;
}
public static ArrayList<Integer> removeDuplicate1(ArrayList<Integer> arlList) {
HashSet h = new HashSet(arlList);
arlList.clear();
arlList.addAll(h);
return arlList;
}
public Intent SetIntentType(String url, String intenttype ){
Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
return null;
}
public void prepareList()
{ intentType = new ArrayList<String>();
listCountry.clear();
listFlag.clear();
if(SessionChoose.listofDoc.size()>0){
for(int i = 0; i< SessionChoose.listofDoc.size() ; i++){
listCountry.add(SessionChoose.listofDoc.get(i));
String filenameArray[] = SessionChoose.listofDoc.get(i).split(".");
String extension = filenameArray[filenameArray.length-1];
}
@Override
public void setUserVisibleHint(boolean isVisibleToUser)
{
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser) {
}
}
private class ApplicationsIntentReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// appManager.loadApplications(false);
// Intent inte = new Intent(getActivity(),LauncherGridActivity.class);
//startActivity(inte);
}
}
}
解决方案
You can use -
@Override
public void setUserVisibleHint(boolean isVisibleToUser)
{
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser) {
}
}
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