com.littlepancake.glpk.GlpkCodeFragment.java Source code

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Here is the source code for com.littlepancake.glpk.GlpkCodeFragment.java

Source

/*
   Copyright 2014, Joseph Rios, Littlepancake Software, info@littlepancake.com
    
   This file is part of the GLPK on Android.
    
GLPK on Android 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.
    
GLPK on Android 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 GLPK on Android.  If not, see <http://www.gnu.org/licenses/>.
    
 */
package com.littlepancake.glpk;

import java.io.IOException;
import java.io.InputStream;

import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.Html;
import android.text.Spanned;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

public class GlpkCodeFragment extends Fragment implements OnClickListener {

    private final String tag = getClass().getSimpleName();
    private Button solveButton;
    private TextView textViewSolution;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.code_sample_layout, container, false);
        TextView tv = (TextView) v.findViewById(R.id.textViewCode);
        solveButton = (Button) v.findViewById(R.id.buttonSolve);
        solveButton.setOnClickListener(this);
        textViewSolution = (TextView) v.findViewById(R.id.textViewSolution);

        InputStream is;
        byte[] buffer = null;
        try {
            is = getActivity().getAssets().open("test.html");

            int size = is.available();

            buffer = new byte[size];
            is.read(buffer);
            is.close();
        } catch (IOException e) {
            tv.setMovementMethod(new ScrollingMovementMethod());
            tv.setText(e.getMessage());
            e.printStackTrace();
        }

        if (buffer != null) {
            String str = new String(buffer);
            Spanned result = Html.fromHtml(str);
            tv.setMovementMethod(new ScrollingMovementMethod());

            tv.setText(result);
        }

        return v;
    }

    @Override
    public void onClick(View v) {
        int id = v.getId();

        if (id == solveButton.getId()) {
            new SolveProblem().execute("");
        }

    }

    private class SolveProblem extends AsyncTask<String, Void, String> {

        private ProgressDialog pdia;

        @Override
        protected String doInBackground(String... params) {
            GlpkJniSample.sample();
            return "Executed";
        }

        @Override
        protected void onPostExecute(String result) {
            textViewSolution.setTextAppearance(getActivity(), android.R.style.TextAppearance_Small);
            textViewSolution.setText(GlpkJniSample.solutionString);
            pdia.dismiss();
        }

        @Override
        protected void onPreExecute() {
            pdia = new ProgressDialog(getActivity());
            pdia.setMessage("Solving... please wait.");
            pdia.show();
        }

    }
}