AppInfo some codes

AppInfo.java

package com.zeuxislo.appsinfo;

import java.io.File;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.Date;
import java.text.SimpleDateFormat;

import android.app.Activity;
import android.content.pm.IPackageStatsObserver;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.PackageStats;
import android.os.Bundle;
import android.os.RemoteException;
import android.util.Log;
import android.widget.ImageView;
import android.widget.TextView;

public class AppDetail extends Activity {
	
	private long cacheSize;
	private long codeSize;
	private long dataSize;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.app_detail);
		
		PackageManager packageManager = this.getPackageManager();
		
		Bundle bundle = new Bundle();
		bundle = this.getIntent().getExtras();
		
		try {
			PackageInfo packageInfo = packageManager.getPackageInfo(bundle.getString("SELECTED_APP_PACKAGE"), PackageManager.GET_PERMISSIONS);
			File appFile = new File(packageInfo.applicationInfo.sourceDir);

			ImageView icon = (ImageView) this.findViewById(R.id.app_detail_icon);
			TextView appName = (TextView) this.findViewById(R.id.app_detail_app_name);
			TextView appVersion = (TextView) this.findViewById(R.id.app_detail_app_version);
			TextView appVersionCode = (TextView) this.findViewById(R.id.app_detail_app_version_code);
			TextView appCreateDate = (TextView) this.findViewById(R.id.app_detail_app_create_date);
			TextView appPackageString = (TextView) this.findViewById(R.id.app_detail_app_package_string);
			TextView appFilePath = (TextView) this.findViewById(R.id.app_detail_file_path);
			
			icon.setImageDrawable(packageInfo.applicationInfo.loadIcon(packageManager));
			appName.setText(packageInfo.applicationInfo.loadLabel(packageManager).toString());
			appVersion.setText(packageInfo.versionName);
			appVersionCode.setText(String.valueOf(packageInfo.versionCode));
			appCreateDate.setText( new SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(new Date(appFile.lastModified())).toString());
			appPackageString.setText(packageInfo.packageName);
			appFilePath.setText(packageInfo.applicationInfo.sourceDir);
			
			// Fill file stats (code, cache and data size)
			getPackageStats(packageManager, packageInfo);
		
		} catch (NameNotFoundException e) {
			e.printStackTrace();
		}

/*		
			ArrayList<Map<String, String>> permissionMapList = new ArrayList<Map<String, String>>();
			for(String premission : p.requestedPermissions) {
				Map<String, String> permissionMap = new HashMap<String, String>();
				try {
					PermissionInfo permissionInfo = this.getPackageManager().getPermissionInfo(premission, PackageManager.GET_META_DATA);
					
					CharSequence label = permissionInfo.loadLabel(this.getPackageManager());
					CharSequence description = permissionInfo.loadDescription(this.getPackageManager());
					
					permissionMap.put("name", (label == null) ? permissionInfo.name : label.toString());
					permissionMap.put("description", (description == null) ? "" : description.toString());
					permissionMap.put("security_level", String.valueOf(permissionInfo.protectionLevel));
					
					permissionMapList.add(permissionMap);
				}catch(NameNotFoundException e) {
				}
			}
		
		newInfo.setPackageName(p.packageName);
		newInfo.setVersionCode(p.versionCode);
		newInfo.setIcon(p.applicationInfo.loadIcon(this.getPackageManager()));
		newInfo.setFileSize(this.convertFileSize(file.length()));
		newInfo.setFileLastModifiedDate(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(file.lastModified())));
		newInfo.setPermissionMapList(permissionMapList);
*/
	}
	
	private void getPackageStats(PackageManager packageManager, PackageInfo packageInfo) {
		Method getPackageSizeInfo;
		
		try {
			getPackageSizeInfo = packageManager.getClass().getMethod("getPackageSizeInfo", String.class, IPackageStatsObserver.class);
			
			Log.d("AppDetail", "Start Package Size Invoker");
			
			try {
				getPackageSizeInfo.invoke(packageManager, packageInfo.packageName, new IPackageStatsObserver.Stub() {
					public void onGetStatsCompleted(PackageStats packageStats, boolean succeeded) throws RemoteException {
						cacheSize = packageStats.cacheSize;
						codeSize = packageStats.codeSize;
						dataSize = packageStats.dataSize;
						
						setFileSizeDetail(cacheSize, codeSize, dataSize);
						
						Log.d("AppDetail", "Cache Size:" + cacheSize + ", Code Size: " + codeSize + ", Data Size: " + dataSize);
					}
				});
			} catch (IllegalArgumentException e) {
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				e.printStackTrace();
			} catch (InvocationTargetException e) {
				e.printStackTrace();
			}
		} catch (SecurityException e) {
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		}
	}
	
	protected void setFileSizeDetail(long cacheSize, long codeSize, long dataSize) {
		
		Log.d("AppDetail", "Cache Size 2:" + cacheSize + ", Code Size: " + codeSize + ", Data Size: " + dataSize);
		
		((TextView) this.findViewById(R.id.app_detail_total_size)).setText(this.convertFileSize(codeSize + dataSize + cacheSize));
		((TextView) this.findViewById(R.id.app_detail_file_size)).setText(this.convertFileSize(codeSize));
		((TextView) this.findViewById(R.id.app_detail_data_size)).setText(this.convertFileSize(dataSize));
		((TextView) this.findViewById(R.id.app_detail_cache_size)).setText(this.convertFileSize(cacheSize));
	}
	
	private String convertFileSize(long size) {
	    String unit = null;
	    
	    float f = (float)size;
	    
	    if (f >= 1024.0F) {
	    	unit = "KB";
	    	f = (float)(f / 1024.0D);
	    	if (f >= 1024.0F) {
	    		unit = "MB";
	    		f = (float)(f / 1024.0D);
	    		if (f >= 1024.0F) {
	    			unit = "GB";
	    			f = (float)(f / 1024.0D);
	    		}
	    	}
	    }
	    
	    return unit == null ? "0" : f + " " + unit;
	}
}