PackageManager mPackageManager = getPackageManager();
PackageInfo p = mPackageManager.getPackageArchiveInfo(<file path>, 0);

if (p != null) {
	ApplicationInfo appInfo = p.applicationInfo;
	String appname = mPackageManager.getApplicationLabel(appInfo)
			.toString();
	String packageName = p.packageName;
	String versionName = p.versionName;
	Drawable icon = mPackageManager.getApplicationIcon(appInfo);
}

// get all installed application
PackageManager mPackageManager = getPackageManager();
List<PackageInfo> packs = mPackageManager.getInstalledPackages(0);

int size = packs.size();
for (int i = 0; i < size; i++) {
	PackageInfo p = packs.get(i);

	if (p.applicationInfo.sourceDir.startsWith("/system/app")) {
		// ignore system application
		continue;
	}

	// get application detail
	ApplicationInfo appInfo = p.applicationInfo;
	String appname = mPackageManager.getApplicationLabel(appInfo)
			.toString();
	String packageName = p.packageName;
	String versionName = p.versionName;
	Drawable icon = mPackageManager.getApplicationIcon(appInfo);
}

/res/values/style.xml

<resources> 
<style name="Transparent"> 
<item name="android:windowIsTranslucent">true</item> 
<item name="android:windowAnimationStyle">@android:style/Animation.Translucent</item> 
<item name ="android:windowBackground">@color/transparent</item> 
<item name="android:windowNoTitle">true</item> 
<item name="android:colorForeground">#fff</item> 
</style> 
</resources> 

<color name="transparent">#00000000</color>

<activity android:name="MyActivity" android:theme="@style/Transparent"></activity> 

private void updateResultsInUi() { 
 

 
  TextView jpgName = (TextView)findViewById(R.id.jpgname);       
  ImageView jpgView = (ImageView)findViewById(R.id.jpgview); 
  String myJpgPath = "/sdcard/test.jpg";               
      jpgName.setText(myJpgPath); 
  BitmapFactory.Options options = new BitmapFactory.Options();   
  options.inSampleSize = 2; 
  Bitmap bm = BitmapFactory.decodeFile(myJpgPath, options); 
  jpgView.setImageBitmap(bm); 
    } 

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState);        
   setContentView(R.layout.main); 
 
    this.pd = ProgressDialog.show(this, "Working...", "*** Downloading Data...", true, false); 
    new DownloadTask().execute(" parameters needed for download"); 
} 
 
private class DownloadTask extends AsyncTask<String, Void, Object> { 
     protected Void doInBackground(String... args) { 
         Log.d("********Jorgesys", "Background thread starting......");  
         startLongRunningOperation();    
        return null;          
     } 
 
     protected void onPostExecute(Object result) { 
         Log.d("********Jorgesys", "onPostExecute......"); 
 
         if (Splash.this.pd != null) { 
          Splash.this.pd.dismiss(); 
         } 
         updateResultsInUi(); 
 
     } 
}  
 
 
protected void startLongRunningOperation() { 
             try 
             { 
             ftp = new FTPClient(); 
             ftp.connect(host); 
             ftp.login("username", "password"); 
             ftp.changeDirectory("public_ftp"); 
       ftp.download("test.jpg", new java.io.File("/sdcard/test.jpg"));  
             } 
      catch(Exception e) 
      {                 
 
      } 
}