Android Open Source - napping-player Data Explorer Activity

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License

The source code is released under:
GNU General Public License
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Java Source Code

// Copyright (C) 2013 Werner Robitza
////  w ww.  j  a v a 2 s . c  om
// This file is part of NappingPlayer.
//
// NappingPlayer 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. 
//
// NappingPlayer 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 NappingPlayer.  If not, see <http://www.gnu.org/licenses/>.
//
// NappingPlayer was written at the University of Vienna by Werner Robitza.

package at.ac.univie.nappingplayer;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.TextView;
import at.ac.univie.nappingplayer.util.Configuration;
import at.ac.univie.nappingplayer.util.IOUtil;
import at.ac.univie.nappingplayer.views.DataExplorerAdapter;
import at.ac.univie.nappingplayer.views.DataExplorerChild;
import at.ac.univie.nappingplayer.views.DataExplorerGroup;

public class DataExplorerActivity extends Activity {

  private static final String TAG = DataExplorerActivity.class.getSimpleName();
  
  private DataExplorerAdapter mExpAdapter;
  private ArrayList<DataExplorerGroup> mExpListItems;
  private ExpandableListView mExpandList;
  
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_data_explorer);
        
        View v = findViewById(R.id.layout_data_explorer);
        v.setSystemUiVisibility(View.STATUS_BAR_HIDDEN);
        
        mExpandList = (ExpandableListView) findViewById(R.id.data_explorer_list);
        mExpListItems = getItems();
        mExpAdapter = new DataExplorerAdapter(DataExplorerActivity.this, mExpListItems);
        mExpandList.setAdapter(mExpAdapter);
        //mExpandList.setGroupIndicator(null);
        
        mExpandList.setOnChildClickListener(mOnChildClickListener);
    }
    
    
    @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.activity_data_explorer, menu);
    return true;
  }
    
    @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle item selection
    switch (item.getItemId()) {
    case R.id.menu_clear:
      showClearDialog();
      return true;
    default:
      return super.onOptionsItemSelected(item);
    }
  }
    
    /**
     * What happens when a child item is clicked
     */
    private ExpandableListView.OnChildClickListener mOnChildClickListener = new ExpandableListView.OnChildClickListener() {
    @Override
    public boolean onChildClick(ExpandableListView parent, View v,
        int groupPosition, int childPosition, long id) {
      DataExplorerChild c = (DataExplorerChild) mExpAdapter.getChild(groupPosition, childPosition);
          // perform work on child object here
          Log.d(TAG, "Clicked on " + c.getName());
          if (c.getTag() == DataExplorerChild.TAG_TEXT) {
            StringBuilder text = IOUtil.readFile(c.getFile()); 
            showTextDialog(text);   
          } else if (c.getTag() == DataExplorerChild.TAG_VIDEO) { 
            playVideo(c.getFile());
          } else {
            // TODO: This is where we'd show an image if possible
            showUnknownDialog();
          }
          return true;
    }
  };
  
  /**
     * Refreshes the adapter's view
     */
    private void refreshView() {
      mExpListItems = getItems();
        mExpAdapter = new DataExplorerAdapter(DataExplorerActivity.this, mExpListItems);
        mExpandList.setAdapter(mExpAdapter);
    }
    
    private void showTextDialog(StringBuilder text) {
    LayoutInflater inflater = getLayoutInflater();
    final View dialogView = inflater.inflate(R.layout.dialog_text_view, null);
    
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setView(dialogView);
    builder.setPositiveButton("OK", null);
    builder.show();
    
    TextView tv  = (TextView) dialogView.findViewById(R.id.tv_dialog_text);
    tv.setText(text);
    
  }


  /**
     * Deletes all log files from the device
     */
    private void showClearDialog() {
      new AlertDialog.Builder(this)
        .setIcon(android.R.drawable.ic_dialog_alert)
        .setTitle(getText(R.string.dialog_clear_header))
        .setMessage(getText(R.string.dialog_clear_body))
        .setPositiveButton(getText(R.string.yes), new DialogInterface.OnClickListener()
          {
            @Override
          public void onClick(DialogInterface dialog, int which) {
            IOUtil.deleteLogData();
            refreshView();
          }

          })
        .setNegativeButton(getText(R.string.no), null)
        .show();
    }
    
    /**
     * Shows a dialog telling the user the file type is unknown
     */
    private void showUnknownDialog() {
      new AlertDialog.Builder(this)
        .setIcon(android.R.drawable.ic_dialog_alert)
        .setTitle(getText(R.string.dialog_unknown_header))
        .setMessage(getText(R.string.dialog_unknown_body))
        .setPositiveButton("OK", null)
        .show();
    }
    
    /**
     * Plays a single video
     */
    private void playVideo(File f) {
      int videoId = VideoPlaylist.getId(f);
      Intent showVideo = new Intent(this, ViewActivity.class);
    showVideo.putExtra("videoId", videoId);
    startActivity(showVideo);
  }
    
    /**
     * Populates an array of item groups from the SD card folders
     */
    private ArrayList<DataExplorerGroup> getItems() {
      
      ArrayList<DataExplorerGroup> list = new ArrayList<DataExplorerGroup>();
      
      ArrayList<File> logFiles = new ArrayList<File>(Arrays.asList(Configuration.getLogFolder().listFiles()));
      ArrayList<File> videoFiles = Configuration.getVideos();
      
      // collect logs
      DataExplorerGroup logFileGroup = new DataExplorerGroup();
      logFileGroup.setName(getText(R.string.log_files).toString());
      ArrayList<DataExplorerChild> logFileList = new ArrayList<DataExplorerChild>();
      for (File f : logFiles) {
        DataExplorerChild c = new DataExplorerChild();
        c.setName(f.getName());
        
        String name = f.getName().toLowerCase();
        if (name.endsWith(".csv") || name.endsWith(".txt")) {
          c.setTag(DataExplorerChild.TAG_TEXT);          
        } else if (name.endsWith(".jpg") || name.endsWith(".png") || name.endsWith(".gif")) {
          c.setTag(DataExplorerChild.TAG_IMAGE);
        } else {          
          c.setTag(DataExplorerChild.TAG_UNKNOWN);
        }
        
        c.setFile(f);
        logFileList.add(c);
      }
      logFileGroup.setItems(logFileList);
      list.add(logFileGroup);
      
      // collect videos
      DataExplorerGroup videoFileGroup = new DataExplorerGroup();
      videoFileGroup.setName(getText(R.string.video_files).toString());
      ArrayList<DataExplorerChild> videoFileList = new ArrayList<DataExplorerChild>();
      for (File f : videoFiles) {
        DataExplorerChild c = new DataExplorerChild();
        c.setName(f.getName() + " (ID " + VideoPlaylist.getId(f) + ")");
        
        String name = f.getName().toLowerCase();
        if (name.endsWith(".mp4") || name.endsWith(".mov") || name.endsWith(".flv")) {
          c.setTag(DataExplorerChild.TAG_VIDEO);          
        } else {
          c.setTag(DataExplorerChild.TAG_UNKNOWN);
        }
        
        c.setFile(f);
        videoFileList.add(c);
      }
      videoFileGroup.setItems(videoFileList);
      list.add(videoFileGroup);
      
        
        return list;
    }

}
Java Source Code List
