Android获取应用程序大小和缓存的实例代码

info

package com.qin.appsize;import android.content.Intent;import android.graphics.drawable.Drawable;//Model类 ，用来存储应用程序信息public class AppInfo {    private String appLabel;    //应用程序标签    private Drawable appIcon ;  //应用程序图像    private Intent intent ;     //启动应用程序的Intent ，一般是Action为Main和Category为Lancher的Activity    private String pkgName ;    //应用程序所对应的包名    private long cachesize ;   //缓存大小    private long datasize ;    //数据大小    private long codesieze ;   //应用程序大小    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 ;    }}

自定义的类

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;//自定义适配器类，提供给listView的自定义viewpublic 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);        }    }}

主类

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 ;     //全局变量，保存当前查询包得信息    private long cachesize ; //缓存大小    private long datasize  ;  //数据大小     private long codesize  ;  //应用程序大小    private long totalsize ; //总大小    @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(); // 查询所有应用程序信息        BrowseApplicationInfoAdapter browseAppAdapter = new BrowseApplicationInfoAdapter(                this, mlistAppInfo);        listview.setAdapter(browseAppAdapter);        listview.setOnItemClickListener(this);    }     // 点击弹出对话框，显示该包得大小    public void onItemClick(AdapterView<?> arg0, View view, int position,long arg3) {        //更新显示当前包得大小信息        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) ; //缓存大小        TextView tvdatasize = (TextView) dialog.findViewById(R.id.tvdatasize)  ; //数据大小        TextView tvcodesize = (TextView) dialog.findViewById(R.id.tvcodesize) ; // 应用程序大小        TextView tvtotalsize = (TextView) dialog.findViewById(R.id.tvtotalsize) ; //总大小        //类型转换并赋值        tvcachesize.setText(formateFileSize(cachesize));        tvdatasize.setText(formateFileSize(datasize)) ;        tvcodesize.setText(formateFileSize(codesize)) ;        tvtotalsize.setText(formateFileSize(totalsize)) ;        //显示自定义对话框        AlertDialog.Builder builder =new AlertDialog.Builder(MainActivity.this) ;        builder.setView(dialog) ;        builder.setTitle(mlistAppInfo.get(position).getAppLabel()+"的大小信息为：") ;        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialog, int which) {                // TODO Auto-generated method stub                dialog.cancel() ;  // 取消显示对话框            }        });        builder.create().show() ;    }    public void  queryPacakgeSize(String pkgName) throws Exception{        if ( pkgName != null){            //使用放射机制得到PackageManager类的隐藏函数getPackageSizeInfo            PackageManager pm = getPackageManager();  //得到pm对象            try {                //通过反射机制获得该隐藏函数                Method getPackageSizeInfo = pm.getClass().getDeclaredMethod("getPackageSizeInfo", String.class,IPackageStatsObserver.class);                //调用该函数，并且给其分配参数 ，待调用流程完成后会回调PkgSizeObserver类的函数                getPackageSizeInfo.invoke(pm, pkgName,new PkgSizeObserver());            }             catch(Exception ex){                Log.e(TAG, "NoSuchMethodException") ;                ex.printStackTrace() ;                throw ex ;  // 抛出异常            }         }    }    //aidl文件形成的Bindler机制服务类    public class PkgSizeObserver extends IPackageStatsObserver.Stub{        /*** 回调函数，         * @param pStatus ,返回数据封装在PackageStats对象中         * @param succeeded  代表回调成功         */         @Override        public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)                throws RemoteException {            // TODO Auto-generated method stub            cachesize = pStats.cacheSize  ; //缓存大小            datasize = pStats.dataSize  ;  //数据大小             codesize =  pStats.codeSize  ;  //应用程序大小            totalsize = cachesize + datasize + codesize ;            Log.i(TAG, "cachesize--->"+cachesize+" datasize---->"+datasize+ " codeSize---->"+codesize)  ;        }    }    //系统函数，字符串转换 long -String (kb)    private String formateFileSize(long size){        return Formatter.formatFileSize(MainActivity.this, size);     }   // 获得所有启动Activity的信息，类似于Launch界面    public void queryAppInfo() {        PackageManager pm = this.getPackageManager(); // 获得PackageManager对象        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);        // 通过查询，获得所有ResolveInfo对象.        List<ResolveInfo> resolveInfos = pm.queryIntentActivities(mainIntent, 0);        // 调用系统排序 ， 根据name排序        // 该排序很重要，否则只能显示系统应用，而不能列出第三方应用程序        Collections.sort(resolveInfos,new ResolveInfo.DisplayNameComparator(pm));        if (mlistAppInfo != null) {            mlistAppInfo.clear();            for (ResolveInfo reInfo : resolveInfos) {                String activityName = reInfo.activityInfo.name; // 获得该应用程序的启动Activity的name                String pkgName = reInfo.activityInfo.packageName; // 获得应用程序的包名                String appLabel = (String) reInfo.loadLabel(pm); // 获得应用程序的Label                Drawable icon = reInfo.loadIcon(pm); // 获得应用程序图标                // 为应用程序的启动Activity 准备Intent                Intent launchIntent = new Intent();                launchIntent.setComponent(new ComponentName(pkgName,activityName));                // 创建一个AppInfo对象，并赋值                AppInfo appInfo = new AppInfo();                appInfo.setAppLabel(appLabel);                appInfo.setPkgName(pkgName);                appInfo.setAppIcon(icon);                appInfo.setIntent(launchIntent);                mlistAppInfo.add(appInfo); // 添加至列表中            }        }    }}