Android Open Source - MusicPlayer-OLD Utils

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2012-2014 Andrea De Cesare/*from w ww.  j  a  v a 2s  . com*/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.andreadec.musicplayer;

import java.io.*;
import java.text.*;

import android.app.*;
import android.content.*;
import android.graphics.*;
import android.media.*;
import android.net.*;

public class Utils {
  /* Builds a simple message dialog */
  public static void showMessageDialog(Context context, int title, int message) {
    AlertDialog.Builder builder = new AlertDialog.Builder(context);
    builder.setTitle(title);
    builder.setMessage(message);
    builder.setPositiveButton(R.string.ok, null);
    builder.show();
  }
  
  /* Gets file size from its uri */
  public static String getFileSize(String uri) {
    try {
      File file = new File(uri);
      return formatFileSize(file.length());
    } catch(Exception e) {
      return "";
    }
  }
  
  /* Converts size in byte to a more readable format */
  public static String formatFileSize(long size) {
    DecimalFormat df = new DecimalFormat("#.##");
    double kb = (double)(size)/1024.0;
    if(kb<1024) return df.format(kb) + " KiB";
    else return df.format(kb/1024.0) + " MiB";
  }
  
  /* Checks if the device is connected to a WiFi network */
  public static boolean isWifiConnected() {
    ConnectivityManager cm = (ConnectivityManager)(MusicPlayerApplication.getContext().getSystemService(Context.CONNECTIVITY_SERVICE));
    NetworkInfo wifi = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
    return wifi.isConnected();
  }
  
  public static String formatTime(int milliseconds) {
    String ret = "";
    int seconds = (int) (milliseconds / 1000) % 60 ;
    int minutes = (int) ((milliseconds / (1000*60)) % 60);
    int hours   = (int) ((milliseconds / (1000*60*60)) % 24);
    if(hours>0) ret += hours+":";
    ret += minutes<10 ? "0"+minutes+":" : minutes+":";
    ret += seconds<10 ? "0"+seconds : seconds+"";
    return ret;
  }
  
  public static Bitmap getMusicFileImage(String uri) {
    MediaMetadataRetriever mmr = new MediaMetadataRetriever();
    mmr.setDataSource(uri);
    byte[] imageBytes = mmr.getEmbeddedPicture();
    Bitmap image = null;
    if(imageBytes!=null) {
      image = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);
    }
    mmr.release();
    return image;
  }
}

Java Source Code List

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