Java tutorial
/* * Copyright (C) 2017 Ashar Khan <ashar786khan@gmail.com> * * This file is part of Matrix Calculator. * * Matrix Calculator is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Matrix Calculator is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Matrix Calculator. If not, see <http://www.gnu.org/licenses/>. * */ package com.softminds.matrixcalculator.OperationFragments; import android.app.ProgressDialog; import android.content.ClipData; import android.content.ClipboardManager; import android.content.Context; import android.content.DialogInterface; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.preference.PreferenceManager; import android.support.v4.app.ListFragment; import android.support.v7.app.AlertDialog; import android.util.Log; import android.view.View; import android.widget.ListView; import android.widget.Toast; import com.softminds.matrixcalculator.GlobalValues; import com.softminds.matrixcalculator.MatrixV2; import com.softminds.matrixcalculator.MatrixAdapter; import com.softminds.matrixcalculator.R; import java.lang.ref.WeakReference; import java.text.DecimalFormat; import java.util.ArrayList; @SuppressWarnings("ConstantConditions") public class DeterminantFragment extends ListFragment { ArrayList<MatrixV2> SquareList; //Inner Class @SuppressWarnings("ConstantConditions") private static class MyHandler extends Handler { private final WeakReference<DeterminantFragment> determinantFragmentWeakReference;// a weak Reference to Outer Fragment private MyHandler(DeterminantFragment fragment) { determinantFragmentWeakReference = new WeakReference<>(fragment); //Initialize the Weak Reference with the Fragment } @Override public void handleMessage(Message msg) //override this method { final DeterminantFragment determinantFragment = determinantFragmentWeakReference.get(); if (determinantFragment != null) { final Bundle val; val = msg.getData(); if (determinantFragment.isVisible()) { final String mes = determinantFragment.getString(R.string.determinant_is) + " " + determinantFragment.GetText(val.getDouble("RESULTANT")); final AlertDialog.Builder builder = new AlertDialog.Builder(determinantFragment.getContext()); builder.setPositiveButton(R.string.copy, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { ClipboardManager clipboardManager = (ClipboardManager) determinantFragment.getActivity() .getSystemService(Context.CLIPBOARD_SERVICE); ClipData clipData = ClipData.newPlainText("DETERMINANT_RES", determinantFragment.GetText(val.getDouble("RESULTANT"))); clipboardManager.setPrimaryClip(clipData); if (clipboardManager.hasPrimaryClip()) { Toast.makeText(determinantFragment.getContext(), R.string.CopyToClip, Toast.LENGTH_SHORT).show(); } else Log.d("ClipData", "Failed to set to Clip board"); dialogInterface.dismiss(); } }); builder.setNeutralButton(R.string.Done, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { dialogInterface.dismiss(); } }); builder.setMessage(mes); builder.setTitle(R.string.determinant); builder.setCancelable(false); builder.show(); } else Log.d("Determinant : ", "not shown"); } } } private final MyHandler myhandler = new MyHandler(this); @Override public void onActivityCreated(Bundle savedInstances) { super.onActivityCreated(savedInstances); SquareList = new ArrayList<>(); for (int i = 0; i < ((GlobalValues) getActivity().getApplication()).GetCompleteList().size(); i++) { if (((GlobalValues) getActivity().getApplication()).GetCompleteList().get(i).isSquareMatrix()) SquareList.add(((GlobalValues) getActivity().getApplication()).GetCompleteList().get(i)); } MatrixAdapter MatriXadapter = new MatrixAdapter(getActivity(), R.layout.list_layout_fragment, SquareList); getListView().setDividerHeight(1); setListAdapter(MatriXadapter); } @Override public void onListItemClick(ListView L, View V, int position, long id) { ProgressDialog progressDialog = new ProgressDialog(getContext()); progressDialog.setMessage(getString(R.string.Calculating)); progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progressDialog.setIndeterminate(false); progressDialog.setCanceledOnTouchOutside(false); progressDialog.show(); RunToGetDeterminant(position, progressDialog); } public void RunToGetDeterminant(final int pos, final ProgressDialog px) { Runnable runnable = new Runnable() { @Override public void run() { double var = SquareList.get(pos).getDeterminant(px); Message message = new Message(); Bundle bundle = new Bundle(); bundle.putDouble("RESULTANT", var); message.setData(bundle); px.dismiss(); myhandler.sendMessage(message); } }; Thread thread = new Thread(runnable); thread.start(); } private String GetText(double res) { if (!PreferenceManager.getDefaultSharedPreferences(getContext()).getBoolean("DECIMAL_USE", true)) { DecimalFormat decimalFormat = new DecimalFormat("###############"); return decimalFormat.format(res); } else { switch (Integer.parseInt( PreferenceManager.getDefaultSharedPreferences(getContext()).getString("ROUNDIND_INFO", "0"))) { case 0: DecimalFormat zeroth = new DecimalFormat("########.######"); return zeroth.format(res); case 1: DecimalFormat single = new DecimalFormat("########.#"); return single.format(res); case 2: DecimalFormat Double = new DecimalFormat("########.##"); return Double.format(res); case 3: DecimalFormat triple = new DecimalFormat("########.###"); return triple.format(res); default: DecimalFormat fourth = new DecimalFormat("########.#####"); return fourth.format(res); } } } }