Java tutorial
// Fragment_Filters package com.mk4droid.IMC_Activities; import java.util.ArrayList; import java.util.Locale; import android.app.ProgressDialog; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.res.Configuration; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.app.Fragment; import android.util.DisplayMetrics; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.Button; import android.widget.CheckedTextView; import android.widget.ExpandableListView; import android.widget.ExpandableListView.OnGroupClickListener; import android.widget.ExpandableListView.OnGroupCollapseListener; import android.widget.ExpandableListView.OnGroupExpandListener; import android.widget.LinearLayout; import android.widget.Toast; import com.flurry.android.FlurryAgent; import com.mk4droid.IMC_Core.FilterCateg_ExpandableListAdapter; import com.mk4droid.IMC_Services.DatabaseHandler; import com.mk4droid.IMC_Services.Service_Data; import com.mk4droid.IMC_Store.Constants_API; import com.mk4droid.IMCity_PackDemo.R; /** * This fragment contains the filtering options for the issues. * * @copyright Copyright (C) 2012 - 2013 Information Technology Institute ITI-CERTH. All rights reserved. * @license GNU Affero General Public License version 3 or later; see LICENSE.txt * @author Dimitrios Ververidis for the Multimedia Group (http://mklab.iti.gr). * */ public class Fragment_Filters extends Fragment implements View.OnClickListener { /** A Flag to indicated whether something has changed in Filters */ public static boolean FiltersChangedFlag = false; static boolean OpenSW, AckSW, ClosedSW; /** Object for inflating views */ public static LayoutInflater FiltInflater; static ProgressDialog dialogFiltersCh; static Resources resources; int tlv = Toast.LENGTH_LONG; String LangSTR; Button btSelectAllFilters, btReverseAllFilters; /** Context of this activity */ public static Context ctx; /** The expandable listview object */ public static ExpandableListView elv; LinearLayout llfilters; FilterCateg_ExpandableListAdapter adapter_explist; int NParents; // number parents (the same with groups) /** The parental categories */ public static String[] groups; // = { "People Names", "Dog Names", "Cat Names", "Fish Names" }; /** Is parental category checked or not */ public static boolean[] groups_check_values; // = {false, true, true, true}; /** Icons of parental categories */ public static Drawable[] groups_icon_values; /** category id of parental group */ public static int[] groups_id; /** Children categories */ public static String[][] children; /** id of children categories */ public static int[][] children_id; /** is children category checked */ public static boolean[][] children_check_values; /** Icon of children category */ public static Drawable[][] children_icon_values; public static ArrayList<ArrayList<String>> ChildrenL; //-- State Categs Vars CheckedTextView ctv_Open, ctv_Ack, ctv_Closed; int icon_on = android.R.drawable.checkbox_on_background; int icon_off = android.R.drawable.checkbox_off_background; View v; /** * OnCreateView */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { ctx = this.getActivity(); resources = setResources(); FActivity_TabHost.IndexGroup = 3; v = inflater.inflate(R.layout.fragment_filters, container, false); dialogFiltersCh = new ProgressDialog(ctx); FiltInflater = inflater; //--------- Categories: Separate Parents (or Groups) from Children ---------------- int NCategs = Service_Data.mCategL.size(); ArrayList<String> ParentsL = new ArrayList<String>(); ArrayList<Integer> ParentsL_index = new ArrayList<Integer>(); ArrayList<Boolean> ParentsL_values = new ArrayList<Boolean>(); ArrayList<Bitmap> ParentsL_Bitmaps = new ArrayList<Bitmap>(); // Find Parents for (int i = 0; i < NCategs; i++) { if (Service_Data.mCategL.get(i)._level == 1) { ParentsL.add(Service_Data.mCategL.get(i)._name); ParentsL_values.add(Service_Data.mCategL.get(i)._visible == 1); ParentsL_index.add(Service_Data.mCategL.get(i)._id); byte[] ic = Service_Data.mCategL.get(i)._icon; ParentsL_Bitmaps.add(BitmapFactory.decodeByteArray(ic, 0, ic.length)); } } NParents = ParentsL_values.size(); groups = new String[NParents]; groups_check_values = new boolean[NParents]; groups_icon_values = new Drawable[NParents]; groups_id = new int[NParents]; for (int i = 0; i < NParents; i++) { groups[i] = ParentsL.get(i); groups_check_values[i] = ParentsL_values.get(i); groups_icon_values[i] = new BitmapDrawable(ParentsL_Bitmaps.get(i)); groups_id[i] = ParentsL_index.get(i); } //------------- Children ------------------------------- ChildrenL = new ArrayList<ArrayList<String>>(); ArrayList<ArrayList<Boolean>> ChildrenC = new ArrayList<ArrayList<Boolean>>(); ArrayList<ArrayList<Drawable>> ChildrenD = new ArrayList<ArrayList<Drawable>>(); ArrayList<ArrayList<Integer>> ChildrenID = new ArrayList<ArrayList<Integer>>(); for (int iParentSerial = 0; iParentSerial < NParents; iParentSerial++) { int IndexParent = ParentsL_index.get(iParentSerial); ChildrenL.add(new ArrayList<String>()); ChildrenC.add(new ArrayList<Boolean>()); ChildrenD.add(new ArrayList<Drawable>()); ChildrenID.add(new ArrayList<Integer>()); for (int i = 0; i < NCategs; i++) { if (Service_Data.mCategL.get(i)._parentid == IndexParent) { ChildrenL.get(iParentSerial).add(Service_Data.mCategL.get(i)._name); ChildrenC.get(iParentSerial).add(Service_Data.mCategL.get(i)._visible == 1); byte[] ic = Service_Data.mCategL.get(i)._icon; ChildrenD.get(iParentSerial) .add(new BitmapDrawable(BitmapFactory.decodeByteArray(ic, 0, ic.length))); ChildrenID.get(iParentSerial).add(Service_Data.mCategL.get(i)._id); } } } children = new String[NParents][]; children_check_values = new boolean[NParents][]; children_icon_values = new Drawable[NParents][]; children_id = new int[NParents][]; for (int i = 0; i < NParents; i++) { int NChildren = ChildrenL.get(i).size(); children[i] = new String[NChildren]; children_check_values[i] = new boolean[NChildren]; children_icon_values[i] = new Drawable[NChildren]; children_id[i] = new int[NChildren]; for (int j = 0; j < NChildren; j++) { children[i][j] = ChildrenL.get(i).get(j).toString(); children_check_values[i][j] = ChildrenC.get(i).get(j); children_icon_values[i][j] = ChildrenD.get(i).get(j); children_id[i][j] = ChildrenID.get(i).get(j); } } //------------ btSelectAllFilters = (Button) v.findViewById(R.id.btSelectAllFilters); btReverseAllFilters = (Button) v.findViewById(R.id.btReverseAllFilters); //-------- List View- ------------------------ llfilters = (LinearLayout) v.findViewById(R.id.llfilters); //------------ Set All other categories -------- elv = (ExpandableListView) v.findViewById(R.id.elvMain); adapter_explist = new FilterCateg_ExpandableListAdapter(elv, llfilters); // -------- Exp List View ----------- elv.setAdapter(adapter_explist); // expand children with 1 child so as to remove expander icon for (int i = 0; i < NParents; i++) { if (ChildrenL.get(i).size() == 0) { elv.expandGroup(i); } } //----------- Radio button for State Categories --------- ctv_Open = (CheckedTextView) v.findViewById(R.id.ctv_Open); ctv_Ack = (CheckedTextView) v.findViewById(R.id.ctv_Ack); ctv_Closed = (CheckedTextView) v.findViewById(R.id.ctv_Closed); ctv_Open.setChecked(OpenSW); ctv_Ack.setChecked(AckSW); ctv_Closed.setChecked(ClosedSW); ctv_Open.setOnClickListener(this); ctv_Ack.setOnClickListener(this); ctv_Closed.setOnClickListener(this); ctv_Open.setText(resources.getString(R.string.OpenIssue)); ctv_Ack.setText(resources.getString(R.string.AckIssue)); ctv_Closed.setText(resources.getString(R.string.ClosedIssue)); //--------------- Button Reverse All Filters ------------- btReverseAllFilters.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { FiltersChangedFlag = true; //--------- Set DB ---------------- DatabaseHandler dbHandler = new DatabaseHandler(ctx); for (int i = 0; i < NParents; i++) { int NChildren = ChildrenL.get(i).size(); groups_check_values[i] = !groups_check_values[i]; dbHandler.setCategory(groups_id[i], groups_check_values[i] ? 1 : 0); // Send as integer for (int j = 0; j < NChildren; j++) { children_check_values[i][j] = !children_check_values[i][j]; dbHandler.setCategory(children_id[i][j], children_check_values[i][j] ? 1 : 0); // Send as integer } } dbHandler.db.close(); //--------- Set GUI ---------------- adapter_explist = new FilterCateg_ExpandableListAdapter(elv, llfilters); elv.setAdapter(adapter_explist); // expand children with 1 child so as to remove expander icon for (int i = 0; i < NParents; i++) { if (ChildrenL.get(i).size() == 0) { elv.expandGroup(i); } } } }); //--------------- Button Select All Filters ------------- //------ Check to see if all inactive -------- int sumVisible = 0; for (int i = 0; i < NCategs; i++) sumVisible += Service_Data.mCategL.get(i)._visible; if (sumVisible > 0) btSelectAllFilters.setTag(false); else btSelectAllFilters.setTag(true); //------------- btSelectAllFilters.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { FiltersChangedFlag = true; //----- Set DB --------- DatabaseHandler dbHandler = new DatabaseHandler(ctx); for (int i = 0; i < NParents; i++) { int NChildren = ChildrenL.get(i).size(); groups_check_values[i] = (Boolean) btSelectAllFilters.getTag(); dbHandler.setCategory(groups_id[i], groups_check_values[i] ? 1 : 0); // Send as integer for (int j = 0; j < NChildren; j++) { children_check_values[i][j] = (Boolean) btSelectAllFilters.getTag(); dbHandler.setCategory(children_id[i][j], children_check_values[i][j] ? 1 : 0); // Send as integer } } dbHandler.db.close(); btSelectAllFilters.setTag(!(Boolean) btSelectAllFilters.getTag()); //------ Set GUI ----- adapter_explist = new FilterCateg_ExpandableListAdapter(elv, llfilters); elv.setAdapter(adapter_explist); // expand children with 1 child so as to remove expander icon for (int i = 0; i < NParents; i++) { if (ChildrenL.get(i).size() == 0) { elv.expandGroup(i); } } } }); return v; }//--------------------- End of CreateView ----------------- //========================== savePreferences ================================= /** * Save preferences * * @param key the name of the preference * @param value the value of the preference * @param type either "Boolean" or "String" */ private void savePreferences(String key, Object value, String type) { SharedPreferences shPrefs = PreferenceManager.getDefaultSharedPreferences(ctx); //SharedPreferences shPrefs = getSharedPreferences("myprefs",MODE_PRIVATE); SharedPreferences.Editor editor = shPrefs.edit(); if (type.equals("String")) editor.putString(key, (String) value); else editor.putBoolean(key, (Boolean) value); editor.commit(); } //====================== SetResources ============================ /* * Set resources as saved in preferences from previous session, e.g. Language, Open, Closed filters * * @return the current resources depending on the language chosen */ private Resources setResources() { SharedPreferences mshPrefs = PreferenceManager.getDefaultSharedPreferences(getActivity()); LangSTR = mshPrefs.getString("LanguageAR", Constants_API.DefaultLanguage); OpenSW = mshPrefs.getBoolean("OpenSW", true); AckSW = mshPrefs.getBoolean("AckSW", true); ClosedSW = mshPrefs.getBoolean("ClosedSW", true); Configuration conf = getActivity().getResources().getConfiguration(); conf.locale = new Locale(LangSTR.substring(0, 2)); //----- Convert Greek -> el --------- DisplayMetrics metrics = new DisplayMetrics(); getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics); return new Resources(ctx.getAssets(), metrics, conf); } /* OnPause */ @Override public void onPause() { //----- Broadcast Filters have changed if (FiltersChangedFlag) ctx.sendBroadcast(new Intent("android.intent.action.MAIN").putExtra("FiltersChanged", "ok")); //---------- Flurry Analytics ------------- SharedPreferences mshPrefs = PreferenceManager.getDefaultSharedPreferences(ctx); boolean AnalyticsSW = mshPrefs.getBoolean("AnalyticsSW", true); if (AnalyticsSW) FlurryAgent.onEndSession(ctx); super.onPause(); } //========================== onResume ================================= /** On resuming from tabChange */ @Override public void onResume() { super.onResume(); FiltersChangedFlag = false; resources = setResources(); ctv_Open.setText(resources.getString(R.string.OpenIssue)); ctv_Ack.setText(resources.getString(R.string.AckIssue)); ctv_Closed.setText(resources.getString(R.string.ClosedIssue)); btSelectAllFilters.setText(resources.getString(R.string.SelAll)); btReverseAllFilters.setText(resources.getString(R.string.Reverse)); elv.setOnGroupClickListener(new OnGroupClickListener() { @Override public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { if (ChildrenL.get(groupPosition).size() == 0) return true; else return false; } }); elv.setOnGroupExpandListener(new OnGroupExpandListener() { @Override public void onGroupExpand(int groupPosition) { int NChildren = Fragment_Filters.children[groupPosition].length; LayoutParams params = elv.getLayoutParams(); try { int h = elv.getChildAt(0).getHeight(); params.height += NChildren * h; elv.setLayoutParams(params); } catch (Exception e) { } } }); elv.setOnGroupCollapseListener(new OnGroupCollapseListener() { @Override public void onGroupCollapse(int groupPosition) { int NChildren = Fragment_Filters.children[groupPosition].length; LayoutParams params = elv.getLayoutParams(); params.height -= NChildren * (elv.getChildAt(0).getHeight()); elv.setLayoutParams(params); } }); //---------- Flurry Analytics -------------- SharedPreferences mshPrefs = PreferenceManager.getDefaultSharedPreferences(ctx); boolean AnalyticsSW = mshPrefs.getBoolean("AnalyticsSW", true); if (AnalyticsSW) FlurryAgent.onStartSession(ctx, Constants_API.Flurry_Key); } /* (non-Javadoc) * @see android.view.View.OnClickListener#onClick(android.view.View) */ @Override public void onClick(View v) { FiltersChangedFlag = true; String Tag = (String) v.getTag(); CheckedTextView ctv = (CheckedTextView) v; boolean currState = ctv.isChecked(); ctv.setChecked(!currState); savePreferences(Tag, !currState, "boolean"); } }