Android Example Code to Get Application Size and Cache

info

package com.qin.appsize;
import android.content.Intent;
import android.graphics.drawable.Drawable;
//Model class used to store application information
public class AppInfo {
private String appLabel; //The application label
private Drawable appIcon ; //The application image
private Intent intent ; //The Intent to start the application, usually an Activity with Action as Main and Category as Launcher
private String pkgName ; //The package name corresponding to the application
private long cachesize ; //Cache size
private long datasize ; //Data size
private long codesieze ; //Application size
public long getCachesize() {
return cachesize;
}
public void setCachesize(long cachesize) {
this.cachesize = cachesize;
}
public long getDatasize() {
return datasize;
}
public void setDatasize(long datasize) {
this.datasize = datasize;
}
public long getCodesieze() {
return codesieze;
}
public void setCodesieze(long codesieze) {
this.codesieze = codesieze;
}
public AppInfo(){}
public String getAppLabel() {
return appLabel;
}
public void setAppLabel(String appName) {
this.appLabel = appName;
}
public Drawable getAppIcon() {}}
return appIcon;
}
public void setAppIcon(Drawable appIcon) {
this.appIcon = appIcon;
}
public Intent getIntent() {
return intent;
}
public void setIntent(Intent intent) {
this.intent = intent;
}
public String getPkgName(){
return pkgName ;
}
public void setPkgName(String pkgName){
this.pkgName=pkgName ;
}
}

Custom class

package com.qin.appsize;
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
//Custom adapter class, providing a custom view for listView
public class BrowseApplicationInfoAdapter extends BaseAdapter {
private List<AppInfo> mlistAppInfo = null;
LayoutInflater infater = null;
public BrowseApplicationInfoAdapter(Context context, List<AppInfo> apps) {
infater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mlistAppInfo = apps ;
}
@Override
public int getCount() {
// TODO Auto-Generated method stub
System.out.println("size" + mlistAppInfo.size());
return mlistAppInfo.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-Generated method stub
return mlistAppInfo.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-Generated method stub
return 0;
}
@Override
public View getView(int position, View convertview, ViewGroup arg2) {
System.out.println("getView at ", + position);
View view = null;
ViewHolder holder = null;
if (convertview == null || convertview.getTag() == null) {
view = infater.inflate(R.layout.browse_app_item, null);
holder = new ViewHolder(view);
view.setTag(holder);
} 
else{
view = convertview ;
holder = (ViewHolder) convertview.getTag() ;
}
AppInfo appInfo = (AppInfo) getItem(position);
holder.appIcon.setImageDrawable(appInfo.getAppIcon());
holder.tvAppLabel.setText(appInfo.getAppLabel());
holder.tvPkgName.setText(appInfo.getPkgName());
return view;
}
class ViewHolder {
ImageView appIcon;
TextView tvAppLabel;
TextView tvPkgName;
public ViewHolder(View view) {
this.appIcon = (ImageView) view.findViewById(R.id.imgApp);
this.tvAppLabel = (TextView) view.findViewById(R.id.tvAppLabel);
this.tvPkgName = (TextView) view.findViewById(R.id.tvPkgName);
}
}
}

Main Class

package com.qin.appsize;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import com.qin.appsize.AppInfo;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.IPackageStatsObserver;
import android.content.pm.PackageManager;
import android.content.pm.PackageStats;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.RemoteException;
import android.text.format.Formatter;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget(AdapterView_;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
public class MainActivity extends Activity implements OnItemClickListener{
private static String TAG = "APP_SIZE";
private ListView listview = null;
private List<AppInfo> mlistAppInfo = null;
LayoutInflater infater = null ; 
//Global variable, saves the information of the current queried package
private long cachesize ; //Cache size
private long datasize ; //Data size 
private long codesize ; //Application size
private long totalsize ; //Total size
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.browse_app_list);
listview = (ListView) findViewById(R.id.listviewApp);
mlistAppInfo = new ArrayList<AppInfo>();
queryAppInfo(); // Query information of all applications
BrowseApplicationInfoAdapter browseAppAdapter = new BrowseApplicationInfoAdapter(
this, mlistAppInfo);
listview.setAdapter(browseAppAdapter);
listview.setOnItemClickListener(this);
}
// Click to pop up a dialog to display the size of the package
public void onItemClick(AdapterView<63;> arg0, View view, int position, long arg3) {
//Update the display of the current package size information
try {
queryPacakgeSize(mlistAppInfo.get(position).getPkgName());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} 
infater = (LayoutInflater) MainActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View dialog = infater.inflate(R.layout.dialog_app_size, null) ;
TextView tvcachesize = (TextView) dialog.findViewById(R.id.tvcachesize) ; //Cache size
TextView tvdatasize = (TextView) dialog.findViewById(R.id.tvdatasize) ; //Data size
TextView tvcodesize = (TextView) dialog.findViewById(R.id.tvcodesize) ; // Application size
TextView tvtotalsize = (TextView) dialog.findViewById(R.id.tvtotalsize) ; //Total size
//Type conversion and assignment
tvcachesize.setText(formatFileSize(cachesize));
tvdatasize.setText(formatFileSize(datasize)) ;
tvcodesize.setText(formatFileSize(codesize)) ;
tvtotalsize.setText(formatFileSize(totalsize)) ;
//Display a custom dialog
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this) ;
builder.setView(dialog) ;
builder.setTitle(mlistAppInfo.get(position).getAppLabel())+"The size information is:") ;
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-Generated method stub
dialog.cancel() ; // Cancel the display of the dialog
}
});
builder.create().show() ;
}
public void queryPacakgeSize(String pkgName) throws Exception{
if ( pkgName != null){
//Use reflection mechanism to get the hidden function getPackageSizeInfo of PackageManager class
PackageManager pm = getPackageManager(); //Get the pm object
try {
//Obtain this hidden function through reflection mechanism
Method getPackageSizeInfo = pm.getClass().getDeclaredMethod("getPackageSizeInfo", String.class, IPackageStatsObserver.class);
//Call this function and assign its parameters, after the calling process is completed, the function of PkgSizeObserver class will be called back
getPackageSizeInfo.invoke(pm, pkgName, new PkgSizeObserver());
} 
catch(Exception ex){
Log.e(TAG, "NoSuchMethodException") ;
ex.printStackTrace() ;
throw ex ; // Throw an exception
} 
}
}
//Service class formed by the Binder mechanism of the aidl file
public class PkgSizeObserver extends IPackageStatsObserver.Stub{
/*** Callback function,
* @param pStatus, the returned data is encapsulated in the PackageStats object
* @param succeeded Represents the success of the callback
*/ 
@Override
public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)
throws RemoteException {
// TODO Auto-Generated method stub
cachesize = pStats.cacheSize ; //Cache size
datasize = pStats.dataSize ; //Data size 
codesize = pStats.codeSize ; //Application size
totalsize = cachesize + datasize + codesize ;
Log.i(TAG, "cachesize--->"+cachesize+" datasize---->"+datasize+ " codeSize---->"+codesize) ;
}
}
//System function, string conversion of long -String (kb)
private String formateFileSize(long size){
return Formatter.formatFileSize(MainActivity.this, size); 
}
// Obtain information about all starting Activities, similar to the Launch interface
public void queryAppInfo() {
PackageManager pm = this.getPackageManager(); // Obtain PackageManager object
Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
// Through the query, obtain all ResolveInfo objects.
List<ResolveInfo> resolveInfos = pm.queryIntentActivities(mainIntent, 0);
// Call system sorting, sorted by name
// This sorting is very important, otherwise only system applications can be displayed, and third-party applications cannot be listed
Collections.sort(resolveInfos, new ResolveInfo.DisplayNameComparator(pm));
if (mlistAppInfo != null) {
mlistAppInfo.clear();
for (ResolveInfo reInfo : resolveInfos) {
String activityName = reInfo.activityInfo.name; // Obtain the name of the starting Activity of the application
String pkgName = reInfo.activityInfo.packageName; // Get the application's package name
String appLabel = (String) reInfo.loadLabel(pm); // Get the application's Label
Drawable icon = reInfo.loadIcon(pm); // Get the application icon
// Prepare Intent for the application's starting Activity
Intent launchIntent = new Intent();
launchIntent.setComponent(new ComponentName(pkgName,activityName));
// Create an AppInfo object and assign values
AppInfo appInfo = new AppInfo();
appInfo.setAppLabel(appLabel);
appInfo.setPkgName(pkgName);
appInfo.setAppIcon(icon);
appInfo.setIntent(launchIntent);
mlistAppInfo.add(appInfo); // Add to the list
}
}
}
}

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