Android Custom Progress bar

Hi Today i am going to present a blog regarding the download process+async task+ custom prohress downloader.

for this purpose make a project with the name CustomProgress and have a main activity with following code


package com.jitesh.customprogress;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
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.graphics.drawable.Drawable;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ProgressBar;

public class MainActivity extends Activity {
ProgressBar progressBar2;
Button button2;
ImageView my_image;
private static String filedownload_url = "https://lh4.googleusercontent.com/-9z69eoAzRd8/UOjP_igcmtI/AAAAAAAAAsc/-yunBbz8eJI/s300/tour-Ha-Noi-Sword-Lake.jpg";
File myNewFolder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
progressBar2 = (ProgressBar) findViewById(R.id.progressBar);

button2 = (Button) findViewById(R.id.download);
my_image = (ImageView) findViewById(R.id.my_image);
}

public void button_click(View view) {

new DownloadFileFromURL().execute(filedownload_url);

}

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

/* Background Async Task to download file */
class DownloadFileFromURL extends AsyncTask<String, String, String> {
/*  Before starting background thread. Show Progress Bar Dialog */
@SuppressWarnings("deprecation")
@Override
protected void onPreExecute() {
super.onPreExecute();
//showDialog(CUSTOM_PROGRESS_DIALOG);
progressBar2.setVisibility(View.VISIBLE);
}
/* Downloading file in background thread */
@Override
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/filedownload.jpg"); 
           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... value) {
// setting progress percentage
//pDialog.setProgress(Integer.parseInt(value[0]));
//pDialog.setSecondaryProgress(Integer.parseInt(value[0]) + 5);
    }
/*  After completing background task. Dismiss the progress dialog */
@SuppressWarnings("deprecation")
@Override
protected void onPostExecute(String file_url) {
// dismiss the dialog after the file was downloaded
//dismissDialog(CUSTOM_PROGRESS_DIALOG);
progressBar2.setVisibility(View.GONE);     
// Displaying downloaded image into image view
// Reading image path from sdcard
String imagePath = Environment.getExternalStorageDirectory().toString() + "/filedownload.jpg";
// setting downloaded into image view
my_image.setImageDrawable(Drawable.createFromPath(imagePath));
} 
}

}

now the activity_main.xml is having the following layout

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <Button

        android:id="@+id/download"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_margin="5dip"

        android:layout_marginBottom="20dp"

        android:onClick="button_click"

        android:text="Start download file" />

    <RelativeLayout

        xmlns:android="http://schemas.android.com/apk/res/android"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

         android:layout_gravity="center_horizontal|center_vertical" >

        <ProgressBar

            android:id="@+id/progressBar"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center_horizontal|center_vertical"

            android:layout_margin="5dip"

            android:indeterminateDrawable="@drawable/my_progress_indeterminate"

            android:visibility="gone" />

        <ImageView

            android:id="@+id/my_image"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center_horizontal|center_vertical"

            />

    </RelativeLayout>

</LinearLayout>

res/drawable/my_progress_indeterminate

<?xml version="1.0" encoding="utf-8"?>

<animated-rotate xmlns:android="http://schemas.android.com/apk/res/android" 

    android:drawable="@drawable/loadingicon" 

    android:pivotX="50%"

android:pivotY="50%" />

the manifest should have following permissions

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

<uses-permission android:name="android.permission.INTERNET" />

the used res/drawable/loadingicon is given below

the screen shot of the output is as follows

download the source code from link CustomProgress