Android Open Source - CS160-Speech-Tutor Playback

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.speechtutor;
// w  w  w.  ja  v  a2  s .  c  o m
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnGroupExpandListener;

public class Playback extends Activity {
  
  List<String> listDataHeader;
    HashMap<String, List<String>> listDataChild = new HashMap<String, List<String>>();
    ExpandableListView recordings;
    @Override
    protected void onResume() {

       super.onResume();
       this.onCreate(null);
    }
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_playback);
    recordings = (ExpandableListView)findViewById(R.id.recordingsList);
      ArrayList<String> FilesInFolder = GetFiles(Environment.getExternalStorageDirectory()+"/SpeechTutor");
      if(FilesInFolder == null){
        FilesInFolder = new ArrayList<String>();
      }
      recordings.setEmptyView(findViewById(R.id.empty));
    listDataHeader = FilesInFolder;
    
        
    ExpandableListAdapter adapter= new ExpandableListAdapter(this, listDataHeader, listDataChild, recordings);
        
    recordings.setAdapter(adapter);
    
    recordings.setOnGroupExpandListener(new OnGroupExpandListener() {
        int previousItem = -1;

        @Override
        public void onGroupExpand(int groupPosition) {
            if(groupPosition != previousItem )
                recordings.collapseGroup(previousItem );
            previousItem = groupPosition;
            
        }
    });
     
      
  }
  
  public ArrayList<String> GetFiles(String DirectoryPath) {
      ArrayList<String> MyFiles = new ArrayList<String>();
      File f = new File(DirectoryPath);

      f.mkdirs();
      File[] files = f.listFiles();
      Arrays.sort(files, new Comparator<File>(){
          public int compare(File f1, File f2)
          {
              return Long.valueOf(f1.lastModified()).compareTo(f2.lastModified());
          } });
      if (files.length == 0)
          return null;
      else {
          for (int i=0; i<files.length; i++) {
            String extension = files[i].getName().substring(files[i].getName().indexOf("."));
            if(extension.equals(".pcm")){
              MyFiles.add(files[i].getName());
              List<String> accordion = new ArrayList<String>();
              accordion.add(" ");
              listDataChild.put(files[i].getName(),accordion);
            }
          }
      }

      return MyFiles;
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.playback, menu);
    return true;
  }

  public void navigate(View view) {
    Class classToStart = null;
    switch(view.getId()) {
    case R.id.nav_playback: 
      classToStart = Playback.class;
      break;
    case R.id.nav_record:
      classToStart = Record.class;
      break;
    case R.id.nav_statistics:
      classToStart = Statistics.class;
      break;
    case R.id.nav_settings:
      classToStart = Settings.class;
      break;
    }
    Intent intent = new Intent(this, classToStart);
    intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
    startActivity(intent);
  }


}

Java Source Code List

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