<uses-permission android:name="android.permission.GET_PACKAGE_SIZE"></uses-permission>
IPackageStatsObserver.aidl
/*
**
** Copyright 2007, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
**
http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
package android.content.pm;
import android.content.pm.PackageStats;
/**
* API for package data change related callbacks from the Package Manager.
* Some usage scenarios include deletion of cache directory, generate
* statistics related to code, data, cache usage(TODO)
* {@hide}
*/
oneway interface IPackageStatsObserver {
void onGetStatsCompleted(in PackageStats pStats, boolean succeeded);
}
PackageStats.aidl
/* //device/java/android/android/view/WindowManager.aidl
**
** Copyright 2007, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
**
http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
package android.content.pm;
parcelable PackageStats;
MainActivity.java
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 ;
//全局變量，保存當前查詢包得信息
private long cachesize ; //緩存大小
private long datasize ; //數據大小
private long codesize ; //應用程序大小
private long totalsize ; //總大小
@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(); // 查詢所有應用程序信息
BrowseApplicationInfoAdapter browseAppAdapter = new BrowseApplicationInfoAdapter(
this, mlistAppInfo);
listview.setAdapter(browseAppAdapter);
listview.setOnItemClickListener(this);
}
// 點擊彈出對話框，顯示該包得大小
public void onItemClick(AdapterView<?> arg0, View view, int position,long arg3) {
//更新顯示當前包得大小信息
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) ; //緩存大小
TextView tvdatasize = (TextView) dialog.findViewById(R.id.tvdatasize) ; //數據大小
TextView tvcodesize = (TextView) dialog.findViewById(R.id.tvcodesize) ; // 應用程序大小
TextView tvtotalsize = (TextView) dialog.findViewById(R.id.tvtotalsize) ; //總大小
//類型轉換並賦值
tvcachesize.setText(formateFileSize(cachesize));
tvdatasize.setText(formateFileSize(datasize)) ;
tvcodesize.setText(formateFileSize(codesize)) ;
tvtotalsize.setText(formateFileSize(totalsize)) ;
//顯示自定義對話框
AlertDialog.Builder builder =new AlertDialog.Builder(MainActivity.this) ;
builder.setView(dialog) ;
builder.setTitle(mlistAppInfo.get(position).getAppLabel()+"的大小信息爲：") ;
builder.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
dialog.cancel() ; // 取消顯示對話框
}
});
builder.create().show() ;
}
public void queryPacakgeSize(String pkgName) throws Exception{
if ( pkgName != null){
//使用放射機制得到PackageManager類的隱藏函數getPackageSizeInfo
PackageManager pm = getPackageManager(); //得到pm對象
try {
//通過反射機制獲得該隱藏函數
Method getPackageSizeInfo = pm.getClass().getDeclaredMethod("getPackageSizeInfo", String.class,IPackageStatsObserver.class);
//調用該函數，並且給其分配參數 ，待調用流程完成後會回調PkgSizeObserver類的函數
getPackageSizeInfo.invoke(pm, pkgName,new PkgSizeObserver());
}
catch(Exception ex){
Log.e(TAG, "NoSuchMethodException") ;
ex.printStackTrace() ;
throw ex ; // 拋出異常
}
}
}
//aidl文件形成的Bindler機制服務類
public class PkgSizeObserver extends IPackageStatsObserver.Stub{
/*** 回調函數，
* @param pStatus ,返回數據封裝在PackageStats對象中
* @param succeeded 代表回調成功
*/
@Override
public void onGetStatsCompleted(PackageStats pStats, boolean succeeded)
throws RemoteException {
// TODO Auto-generated method stub
cachesize = pStats.cacheSize ; //緩存大小
datasize = pStats.dataSize ; //數據大小
codesize = pStats.codeSize ; //應用程序大小
totalsize = cachesize + datasize + codesize ;
Log.i(TAG, "cachesize--->"+cachesize+" datasize---->"+datasize+ " codeSize---->"+codesize) ;
}
}
//系統函數，字符串轉換 long -String (kb)
private String formateFileSize(long size){
return Formatter.formatFileSize(MainActivity.this, size);
}
// 獲得所有啓動Activity的信息，類似於Launch界面
public void queryAppInfo() {
PackageManager pm = this.getPackageManager(); // 獲得PackageManager對象
Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
// 通過查詢，獲得所有ResolveInfo對象.
List<ResolveInfo> resolveInfos = pm.queryIntentActivities(mainIntent, 0);
// 調用系統排序 ， 根據name排序
// 該排序很重要，否則只能顯示系統應用，而不能列出第三方應用程序
Collections.sort(resolveInfos,new ResolveInfo.DisplayNameComparator(pm));
if (mlistAppInfo != null) {
mlistAppInfo.clear();
for (ResolveInfo reInfo : resolveInfos) {
String activityName = reInfo.activityInfo.name; // 獲得該應用程序的啓動Activity的name
String pkgName = reInfo.activityInfo.packageName; // 獲得應用程序的包名
String appLabel = (String) reInfo.loadLabel(pm); // 獲得應用程序的Label
Drawable icon = reInfo.loadIcon(pm); // 獲得應用程序圖標
// 爲應用程序的啓動Activity 準備Intent
Intent launchIntent = new Intent();
launchIntent.setComponent(new ComponentName(pkgName,activityName));
// 創建一個AppInfo對象，並賦值
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
}
}
}
}