//AppInfoProvider.java
package com.xh.ui;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
/**
 * 類名稱：AppInfoProvider 
 * 類描述：獲取應(yīng)用程序的相關(guān)信息
 * 創(chuàng)建人：LXH 
 */
public class AppInfoProvider {
 private PackageManager packageManager;
 //獲取一個(gè)包管理器
 public AppInfoProvider(Context context){
 packageManager = context.getPackageManager();
 }
 /**
 *獲取系統(tǒng)中所有應(yīng)用信息，
 *并將應(yīng)用軟件信息保存到list列表中。
 **/ 
 public List<AppInfo> getAllApps(){
 List<AppInfo> list = new ArrayList<AppInfo>();
 AppInfo myAppInfo;
  //獲取到所有安裝了的應(yīng)用程序的信息，包括那些卸載了的，但沒(méi)有清除數(shù)據(jù)的應(yīng)用程序 
 List<PackageInfo> packageInfos = packageManager.getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
 for(PackageInfo info:packageInfos){
  myAppInfo = new AppInfo();
  //拿到包名
  String packageName = info.packageName;
  //拿到應(yīng)用程序的信息 
  ApplicationInfo appInfo = info.applicationInfo;
  //拿到應(yīng)用程序的圖標(biāo)
  Drawable icon = appInfo.loadIcon(packageManager);
  //拿到應(yīng)用程序的大小
  //long codesize = packageStats.codeSize;
  //Log.i("info", "-->"+codesize);
  //拿到應(yīng)用程序的程序名
  String appName = appInfo.loadLabel(packageManager).toString();
  myAppInfo.setPackageName(packageName);
  myAppInfo.setAppName(appName);
  myAppInfo.setIcon(icon);
  
  if(filterApp(appInfo)){
  myAppInfo.setSystemApp(false);
  }else{
  myAppInfo.setSystemApp(true);
  }
  list.add(myAppInfo);
 }
 return list;
 }
 /**
 *判斷某一個(gè)應(yīng)用程序是不是系統(tǒng)的應(yīng)用程序，
 *如果是返回true，否則返回false。
 */ 
 public boolean filterApp(ApplicationInfo info){
 //有些系統(tǒng)應(yīng)用是可以更新的，如果用戶自己下載了一個(gè)系統(tǒng)的應(yīng)用來(lái)更新了原來(lái)的，它還是系統(tǒng)應(yīng)用，這個(gè)就是判斷這種情況的
 if((info.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0){
  return true;
 }else if((info.flags & ApplicationInfo.FLAG_SYSTEM) == 0){//判斷是不是系統(tǒng)應(yīng)用
  return true;
 }
 return false;
 }
}

//AppInfo.java
package com.xh.ui;
import android.graphics.drawable.Drawable;
/**
 * 類名稱：AppInfo 
 * 類描述：應(yīng)用程序類，包括了程序相關(guān)屬性
 * 創(chuàng)建人：LXH 
 */
public class AppInfo {
 private Drawable icon;
 private String appName;
 private String packageName;
 private boolean isSystemApp;
 private long codesize;
 public long getCodesize() {
 return codesize;
 }
 public void setCodesize(long codesize) {
 this.codesize = codesize;
 }
 public Drawable getIcon() {
 return icon;
 }
 public void setIcon(Drawable icon) {
 this.icon = icon;
 }
 public String getAppName() {
 return appName;
 }
 public void setAppName(String appName) {
 this.appName = appName;
 }
 public String getPackageName() {
 return packageName;
 }
 public void setPackageName(String packageName) {
 this.packageName = packageName;
 }
 public boolean isSystemApp() {
 return isSystemApp;
 }
 public void setSystemApp(boolean isSystemApp) {
 this.isSystemApp = isSystemApp;
 }
}