Some guy asked me the question regarding to how to download the mp3 files to the sd card and i wrote the program for this purpose please have a look and enjoy the practices.
Create a project with the name DownloadMp3 and have a main activity with following code
package com.jitesh.downloadmp3;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
private static String fileName = "file.mp3";
private static final String MY_URL = "http://www.virginmegastore.me/Library/Music/CD_001214/Tracks/Track1.mp3";
private Button play;
private TextView message;
private ProgressDialog pDialog;
// Progress dialog type (0 - for Horizontal progress bar)
public static final int progress_bar_type = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
play = (Button) findViewById(R.id.download);
message=(TextView)findViewById(R.id.message);
play.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
new DownloadFileFromURL().execute(MY_URL);
}
});
}
/**
* Showing Dialog
* */
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case progress_bar_type:
pDialog = new ProgressDialog(this);
pDialog.setMessage("Downloading file. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setMax(100);
pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pDialog.setCancelable(true);
pDialog.show();
return pDialog;
default:
return null;
}
}
public void downloadStreams() {
try {
URL url = new URL(MY_URL);
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
String PATH = Environment.getExternalStorageDirectory()
+ "/download/";
Log.v("log_tag", "PATH: " + PATH);
File file = new File(PATH);
if (!file.exists()) {
file.mkdirs();
}
File outputFile = new File(file, fileName);
FileOutputStream fos = new FileOutputStream(outputFile);
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.close();
is.close();
} catch (IOException e) {
Log.e("log_tag", "Error: " + e);
}
Log.v("log_tag", "Check: ");
}
class DownloadFileFromURL extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Bar Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(progress_bar_type);
}
/**
* Downloading file in background thread
* */
protected String doInBackground(String... f_url) {
int count;
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
// getting file length
int lenghtOfFile = conection.getContentLength();
// input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(),
8192);
// Output stream to write file
OutputStream output = new FileOutputStream("/sdcard/"
+ fileName);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
/**
* Updating progress bar
* */
protected void onProgressUpdate(String... progress) {
// setting progress percentage
pDialog.setProgress(Integer.parseInt(progress[0]));
}
/**
* After completing background task Dismiss the progress dialog
* **/
@Override
protected void onPostExecute(String file_url) {
// dismiss the dialog after the file was downloaded
dismissDialog(progress_bar_type);
// Displaying downloaded image into image view
// Reading image path from sdcard
String imagePath = Environment.getExternalStorageDirectory()
.toString() + fileName;
// setting downloaded into image view
// my_image.setImageDrawable(Drawable.createFromPath(imagePath));
message.setText("File downloaded and saved to directory==>"+imagePath);
}
}
}
Create a project with the name DownloadMp3 and have a main activity with following code
package com.jitesh.downloadmp3;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
private static String fileName = "file.mp3";
private static final String MY_URL = "http://www.virginmegastore.me/Library/Music/CD_001214/Tracks/Track1.mp3";
private Button play;
private TextView message;
private ProgressDialog pDialog;
// Progress dialog type (0 - for Horizontal progress bar)
public static final int progress_bar_type = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
play = (Button) findViewById(R.id.download);
message=(TextView)findViewById(R.id.message);
play.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
new DownloadFileFromURL().execute(MY_URL);
}
});
}
/**
* Showing Dialog
* */
@Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case progress_bar_type:
pDialog = new ProgressDialog(this);
pDialog.setMessage("Downloading file. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setMax(100);
pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pDialog.setCancelable(true);
pDialog.show();
return pDialog;
default:
return null;
}
}
public void downloadStreams() {
try {
URL url = new URL(MY_URL);
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
String PATH = Environment.getExternalStorageDirectory()
+ "/download/";
Log.v("log_tag", "PATH: " + PATH);
File file = new File(PATH);
if (!file.exists()) {
file.mkdirs();
}
File outputFile = new File(file, fileName);
FileOutputStream fos = new FileOutputStream(outputFile);
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.close();
is.close();
} catch (IOException e) {
Log.e("log_tag", "Error: " + e);
}
Log.v("log_tag", "Check: ");
}
class DownloadFileFromURL extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Bar Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
showDialog(progress_bar_type);
}
/**
* Downloading file in background thread
* */
protected String doInBackground(String... f_url) {
int count;
try {
URL url = new URL(f_url[0]);
URLConnection conection = url.openConnection();
conection.connect();
// getting file length
int lenghtOfFile = conection.getContentLength();
// input stream to read file - with 8k buffer
InputStream input = new BufferedInputStream(url.openStream(),
8192);
// Output stream to write file
OutputStream output = new FileOutputStream("/sdcard/"
+ fileName);
byte data[] = new byte[1024];
long total = 0;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
publishProgress("" + (int) ((total * 100) / lenghtOfFile));
// writing data to file
output.write(data, 0, count);
}
// flushing output
output.flush();
// closing streams
output.close();
input.close();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
/**
* Updating progress bar
* */
protected void onProgressUpdate(String... progress) {
// setting progress percentage
pDialog.setProgress(Integer.parseInt(progress[0]));
}
/**
* After completing background task Dismiss the progress dialog
* **/
@Override
protected void onPostExecute(String file_url) {
// dismiss the dialog after the file was downloaded
dismissDialog(progress_bar_type);
// Displaying downloaded image into image view
// Reading image path from sdcard
String imagePath = Environment.getExternalStorageDirectory()
.toString() + fileName;
// setting downloaded into image view
// my_image.setImageDrawable(Drawable.createFromPath(imagePath));
message.setText("File downloaded and saved to directory==>"+imagePath);
}
}
}
the main layout file is presented here which is activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<TextView
android:id="@+id/message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="@string/hello_world" />
<Button
android:id="@+id/download"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Download" >
</Button>
</RelativeLayout>
the strings.xml is having following attributes
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">DownloadMp3</string>
<string name="hello_world">please click the button to download the stream!</string>
<string name="menu_settings">Settings</string>
</resources>
the manifest should have following permissions
<uses-permission android:name="android.permission.INTERNET" />
<!-- Permission to write to external storage -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
and it should look like below given manifest attributes
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jitesh.downloadmp3"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.jitesh.downloadmp3.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET" />
<!-- Permission to write to external storage -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
</manifest>
the screenshots are given below
Also the source code can be downloaded from http://www.mediafire.com/download/18axcocxot725pl/DownloadMp3.zip
