本節內容是如何獲取Android系統中應用程序的信息,主要包括packagename、label、icon、占用大小等。具體分為兩個
部分,計划如下:
第一部分: 獲取應用程序的packagename、label、icon等 ;
第二部分: 獲取應用程序的占用大小,包括:緩存大小(cachsize)、數據大小(datasize)。
每部分都為您准備了簡單豐富的實例,您一定不會錯過。
Android系統為我們提供了很多服務管理的類,包括ActivityManager、PowerManager(電源管理)、AudioManager(音頻管理)
等。除此之外,還提供了一個PackageManger管理類,它的主要職責是管理應用程序包。 通過它,我們就可以獲取應用程序信息。
引入: AnroidManifest.xml文件節點說明:
一、相關類的介紹
PackageItemInfo類
說明: AndroidManifest.xml文件中所有節點的基類,提供了這些節點的基本信息:a label、icon、 meta-data。它並不
直接使用,而是由子類繼承然后調用相應方法。
常用字段:
public int icon 獲得該資源圖片在R文件中的值 (對應於android:icon屬性)
public int labelRes 獲得該label在R文件中的值(對應於android:label屬性)
public String name 獲得該節點的name值 (對應於android:name屬性)
public String packagename 獲得該應用程序的包名 (對應於android:packagename屬性)
常用方法:
Drawable loadIcon(PackageManager pm) 獲得當前應用程序的圖像
CharSequence loadLabel(PackageManager pm) 獲得當前應用程序的label
ActivityInfo類 繼承自 PackageItemInfo
說明: 獲得應用程序中<activity/>或者 <receiver />節點的信息 。我們可以通過它來獲取我們設置的任何屬性,包括
theme 、launchMode、launchmode等
常用方法繼承至PackageItemInfo類中的loadIcon()和loadLabel()
ServiceInfo 類
說明: 同ActivityInfo類似 ,同樣繼承自 PackageItemInfo,只不過它表示的是<service>節點信息。
ApplicationInfo類 繼承自 PackageItemInfo
說明:獲取一個特定引用程序中<application>節點的信息。
字段說明:
flags字段: FLAG_SYSTEM 系統應用程序
FLAG_EXTERNAL_STORAGE 表示該應用安裝在sdcard中
常用方法繼承至PackageItemInfo類中的loadIcon()和loadLabel()
ResolveInfo類
說明:根據<intent>節點來獲取其上一層目錄的信息,通常是<activity>、<receiver>、<service>節點信息。
常用字段:
public ActivityInfo activityInfo 獲取 ActivityInfo對象,即<activity>或<receiver >節點信息
public ServiceInfo serviceInfo 獲取 ServiceInfo對象,即<service>節點信息
常用方法:
Drawable loadIcon(PackageManager pm) 獲得當前應用程序的圖像
CharSequence loadLabel(PackageManager pm) 獲得當前應用程序的label
PackageInfo類
說明:手動獲取AndroidManifest.xml文件的信息 。
常用字段:
public String packageName 包名
public ActivityInfo[] activities 所有<activity>節點信息
public ApplicationInfo applicationInfo <application>節點信息,只有一個
public ActivityInfo[] receivers 所有<receiver>節點信息,多個
public ServiceInfo[] services 所有<service>節點信息 ,多個
PackageManger 類
說明: 獲得已安裝的應用程序信息 。可以通過getPackageManager()方法獲得。
常用方法:
public abstract PackageManager getPackageManager()
功能:獲得一個PackageManger對象
public abstrac tDrawable getApplicationIcon(StringpackageName)
參數: packageName 包名
功能:返回給定包名的圖標,否則返回null
public abstract ApplicationInfo getApplicationInfo(String packageName, int flags)
參數:packagename 包名
flags 該ApplicationInfo是此flags標記,通常可以直接賦予常數0即可
功能:返回該ApplicationInfo對象
public abstract List<ApplicationInfo> getInstalledApplications(int flags)
參數:flag為一般為GET_UNINSTALLED_PACKAGES,那么此時會返回所有ApplicationInfo。我們可以對ApplicationInfo
的flags過濾,得到我們需要的。
功能:返回給定條件的所有PackageInfo
public abstract List<PackageInfo> getInstalledPackages(int flags)
參數如上
功能:返回給定條件的所有PackageInfo
public abstractResolveInfo resolveActivity(Intent intent, int flags)
參數: intent 查尋條件,Activity所配置的action和category
flags: MATCH_DEFAULT_ONLY :Category必須帶有CATEGORY_DEFAULT的Activity,才匹配
GET_INTENT_FILTERS :匹配Intent條件即可
GET_RESOLVED_FILTER :匹配Intent條件即可
功能 :返回給定條件的ResolveInfo對象(本質上是Activity)
public abstract List<ResolveInfo> queryIntentActivities(Intent intent, int flags)
參數同上
功能 :返回給定條件的所有ResolveInfo對象(本質上是Activity),集合對象
public abstract ResolveInfo resolveService(Intent intent, int flags)
參數同上
功能 :返回給定條件的ResolveInfo對象(本質上是Service)
public abstract List<ResolveInfo> queryIntentServices(Intent intent, int flags)
參數同上
功能 :返回給定條件的所有ResolveInfo對象(本質上是Service),集合對象
二、DEMO講解
通過前面的介紹,相信您一定很了解了,本質上來講,這些XXXInfo類不過是我們在AndroidManifest.XML文件中定義的信息,
知道到這點了,理解起來就不是很難了。
下面我透過兩個簡答的DEMO,來學以致用。
Demo 1: 通過queryIntentActivities()方法,查詢Android系統的所有具備ACTION_MAIN和CATEGORY_LAUNCHER
的Intent的應用程序,點擊后,能啟動該應用,說白了就是做一個類似Home程序的簡易Launcher 。
Demo 2 :通過getInstalledApplications()方法獲取應用,然后對其過濾,查找出我們需要的第三方應用,系統應用,安裝在sdcard的應用。
Demo1 :
圖:
1 、布局文件: 主要有兩個:帶listview的browse_app_list.xml文件 ;listview的項browse_app_item.xml
browse_app_list.xml
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical" android:layout_width="fill_parent"
- android:layout_height="fill_parent">>
- <ListView android:id="@+id/listviewApp" android:layout_width="fill_parent"
- android:layout_height="fill_parent" ></ListView>
- </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent">> <ListView android:id="@+id/listviewApp" android:layout_width="fill_parent" android:layout_height="fill_parent" ></ListView> </LinearLayout>
browse_app_item.xmlbrowse_app_item.xml
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent" android:layout_height="50dip">
- <ImageView android:id="@+id/imgApp" android:layout_width="wrap_content"
- android:layout_height="fill_parent" ></ImageView>
- <RelativeLayout android:layout_width="fill_parent" android:layout_marginLeft="10dip"
- android:layout_height="40dip">
- <TextView android:id="@+id/tvLabel" android:layout_width="wrap_content"
- android:layout_height="wrap_content" android:text="AppLable : "></TextView>
- <TextView android:id="@+id/tvAppLabel" android:layout_width="wrap_content"
- android:layout_toRightOf="@id/tvLabel" android:layout_height="wrap_content"
- android:layout_marginLeft="3dip" android:text="Label" android:textColor="#FFD700"></TextView>
- <TextView android:id="@+id/tvName" android:layout_width="wrap_content"
- android:layout_height="wrap_content" android:layout_below="@id/tvLabel"
- android:text="包名:"></TextView>
- <TextView android:id="@+id/tvPkgName" android:layout_width="wrap_content"
- android:layout_height="wrap_content" android:layout_below="@id/tvAppLabel"
- android:layout_alignLeft="@id/tvAppLabel" android:textColor="#FFD700"></TextView>
- </RelativeLayout>
- </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="50dip"> <ImageView android:id="@+id/imgApp" android:layout_width="wrap_content" android:layout_height="fill_parent" ></ImageView> <RelativeLayout android:layout_width="fill_parent" android:layout_marginLeft="10dip" android:layout_height="40dip"> <TextView android:id="@+id/tvLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="AppLable : "></TextView> <TextView android:id="@+id/tvAppLabel" android:layout_width="wrap_content" android:layout_toRightOf="@id/tvLabel" android:layout_height="wrap_content" android:layout_marginLeft="3dip" android:text="Label" android:textColor="#FFD700"></TextView> <TextView android:id="@+id/tvName" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/tvLabel" android:text="包名:"></TextView> <TextView android:id="@+id/tvPkgName" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/tvAppLabel" android:layout_alignLeft="@id/tvAppLabel" android:textColor="#FFD700"></TextView> </RelativeLayout> </LinearLayout>
2 、AppInfo.java : 保存應用程序信息的Model類
- /Model類 ,用來存儲應用程序信息
- public class AppInfo {
- private String appLabel; //應用程序標簽
- private Drawable appIcon ; //應用程序圖像
- private Intent intent ; //啟動應用程序的Intent ,一般是Action為Main和Category為Lancher的Activity
- private String pkgName ; //應用程序所對應的包名
- 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 ;
- }
- }
/Model類 ,用來存儲應用程序信息 public class AppInfo { private String appLabel; //應用程序標簽 private Drawable appIcon ; //應用程序圖像 private Intent intent ; //啟動應用程序的Intent ,一般是Action為Main和Category為Lancher的Activity private String pkgName ; //應用程序所對應的包名 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 ; } }
3、 BrowseApplicationInfoAdapter.java : 自定義適配器類,為ListView提供視圖
- //自定義適配器類,提供給listView的自定義view
- 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);
- }
- }
- }
//自定義適配器類,提供給listView的自定義view 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); } } }
4 、MainActivity.java 主工程邏輯
請仔細體會queryIntentActivities()方法,並且注意到排序,它很重要。
- <span style="font-size: 13px;">public class MainActivity extends Activity implements OnItemClickListener {
- private ListView listview = null;
- private List<AppInfo> mlistAppInfo = null;
- @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);
- }
- // 點擊跳轉至該應用程序
- public void onItemClick(AdapterView<?> arg0, View view, int position,
- long arg3) {
- // TODO Auto-generated method stub
- Intent intent = mlistAppInfo.get(position).getIntent();
- startActivity(intent);
- }
- // 獲得所有啟動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, PackageManager.MATCH_DEFAULT_ONLY);
- // 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; // 獲得該應用程序的啟動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
- // 為應用程序的啟動Activity 准備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
- System.out.println(appLabel + " activityName---" + activityName
- + " pkgName---" + pkgName);
- }
- }
- }
- }</span>
public class MainActivity extends Activity implements OnItemClickListener {
private ListView listview = null;
private List<AppInfo> mlistAppInfo = null;
@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);
}
// 點擊跳轉至該應用程序
public void onItemClick(AdapterView<?> arg0, View view, int position,
long arg3) {
// TODO Auto-generated method stub
Intent intent = mlistAppInfo.get(position).getIntent();
startActivity(intent);
}
// 獲得所有啟動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, PackageManager.MATCH_DEFAULT_ONLY);
// 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; // 獲得該應用程序的啟動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
// 為應用程序的啟動Activity 准備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
System.out.println(appLabel + " activityName---" + activityName
+ " pkgName---" + pkgName);
}
}
}
}
好了,第一個Demo完成 。。
Demo 2:
demo2在布局、適配器方面和Demo1一樣。只是利用了getInstalledApplications()方法,繼而通過ApplicationInfo.flags來挑選
我們希望的ApplicationInfo對象。
圖:
過濾應用程序如下:
- package com.qiner.appinfo;
- import java.util.ArrayList;
- import java.util.Collections;
- import java.util.List;
- import com.qiner.appinfo.R;
- import android.app.Activity;
- import android.app.Application;
- import android.content.pm.ApplicationInfo;
- import android.content.pm.PackageManager;
- import android.os.Bundle;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.Button;
- import android.widget.ListView;
- public class MainActivity extends Activity {
- public static final int FILTER_ALL_APP = 0; // 所有應用程序
- public static final int FILTER_SYSTEM_APP = 1; // 系統程序
- public static final int FILTER_THIRD_APP = 2; // 第三方應用程序
- public static final int FILTER_SDCARD_APP = 3; // 安裝在SDCard的應用程序
- private ListView listview = null;
- private PackageManager pm;
- private int filter = FILTER_ALL_APP;
- private List<AppInfo> mlistAppInfo ;
- private BrowseApplicationInfoAdapter browseAppAdapter = null ;
- /** Called when the activity is first created. */
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.browse_app_list);
- listview = (ListView) findViewById(R.id.listviewApp);
- if(getIntent()!=null){
- filter = getIntent().getIntExtra("filter", 0) ;
- }
- mlistAppInfo = queryFilterAppInfo(filter); // 查詢所有應用程序信息
- // 構建適配器,並且注冊到listView
- browseAppAdapter = new BrowseApplicationInfoAdapter(this, mlistAppInfo);
- listview.setAdapter(browseAppAdapter);
- }
- // 根據查詢條件,查詢特定的ApplicationInfo
- private List<AppInfo> queryFilterAppInfo(int filter) {
- pm = this.getPackageManager();
- // 查詢所有已經安裝的應用程序
- List<ApplicationInfo> listAppcations = pm
- .getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES);
- Collections.sort(listAppcations,
- new ApplicationInfo.DisplayNameComparator(pm));// 排序
- List<AppInfo> appInfos = new ArrayList<AppInfo>(); // 保存過濾查到的AppInfo
- // 根據條件來過濾
- switch (filter) {
- case FILTER_ALL_APP: // 所有應用程序
- appInfos.clear();
- for (ApplicationInfo app : listAppcations) {
- appInfos.add(getAppInfo(app));
- }
- return appInfos;
- case FILTER_SYSTEM_APP: // 系統程序
- appInfos.clear();
- for (ApplicationInfo app : listAppcations) {
- if ((app.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
- appInfos.add(getAppInfo(app));
- }
- }
- return appInfos;
- case FILTER_THIRD_APP: // 第三方應用程序
- appInfos.clear();
- for (ApplicationInfo app : listAppcations) {
- //非系統程序
- if ((app.flags & ApplicationInfo.FLAG_SYSTEM) <= 0) {
- appInfos.add(getAppInfo(app));
- }
- //本來是系統程序,被用戶手動更新后,該系統程序也成為第三方應用程序了
- else if ((app.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0){
- appInfos.add(getAppInfo(app));
- }
- }
- break;
- case FILTER_SDCARD_APP: // 安裝在SDCard的應用程序
- appInfos.clear();
- for (ApplicationInfo app : listAppcations) {
- if ((app.flags & ApplicationInfo.FLAG_EXTERNAL_STORAGE) != 0) {
- appInfos.add(getAppInfo(app));
- }
- }
- return appInfos;
- default:
- return null;
- }
- return appInfos;
- }
- // 構造一個AppInfo對象 ,並賦值
- private AppInfo getAppInfo(ApplicationInfo app) {
- AppInfo appInfo = new AppInfo();
- appInfo.setAppLabel((String) app.loadLabel(pm));
- appInfo.setAppIcon(app.loadIcon(pm));
- appInfo.setPkgName(app.packageName);
- return appInfo;
- }
- }
package com.qiner.appinfo; import java.util.ArrayList; import java.util.Collections; import java.util.List; import com.qiner.appinfo.R; import android.app.Activity; import android.app.Application; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ListView; public class MainActivity extends Activity { public static final int FILTER_ALL_APP = 0; // 所有應用程序 public static final int FILTER_SYSTEM_APP = 1; // 系統程序 public static final int FILTER_THIRD_APP = 2; // 第三方應用程序 public static final int FILTER_SDCARD_APP = 3; // 安裝在SDCard的應用程序 private ListView listview = null; private PackageManager pm; private int filter = FILTER_ALL_APP; private List<AppInfo> mlistAppInfo ; private BrowseApplicationInfoAdapter browseAppAdapter = null ; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.browse_app_list); listview = (ListView) findViewById(R.id.listviewApp); if(getIntent()!=null){ filter = getIntent().getIntExtra("filter", 0) ; } mlistAppInfo = queryFilterAppInfo(filter); // 查詢所有應用程序信息 // 構建適配器,並且注冊到listView browseAppAdapter = new BrowseApplicationInfoAdapter(this, mlistAppInfo); listview.setAdapter(browseAppAdapter); } // 根據查詢條件,查詢特定的ApplicationInfo private List<AppInfo> queryFilterAppInfo(int filter) { pm = this.getPackageManager(); // 查詢所有已經安裝的應用程序 List<ApplicationInfo> listAppcations = pm .getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES); Collections.sort(listAppcations, new ApplicationInfo.DisplayNameComparator(pm));// 排序 List<AppInfo> appInfos = new ArrayList<AppInfo>(); // 保存過濾查到的AppInfo // 根據條件來過濾 switch (filter) { case FILTER_ALL_APP: // 所有應用程序 appInfos.clear(); for (ApplicationInfo app : listAppcations) { appInfos.add(getAppInfo(app)); } return appInfos; case FILTER_SYSTEM_APP: // 系統程序 appInfos.clear(); for (ApplicationInfo app : listAppcations) { if ((app.flags & ApplicationInfo.FLAG_SYSTEM) != 0) { appInfos.add(getAppInfo(app)); } } return appInfos; case FILTER_THIRD_APP: // 第三方應用程序 appInfos.clear(); for (ApplicationInfo app : listAppcations) { //非系統程序 if ((app.flags & ApplicationInfo.FLAG_SYSTEM) <= 0) { appInfos.add(getAppInfo(app)); } //本來是系統程序,被用戶手動更新后,該系統程序也成為第三方應用程序了 else if ((app.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0){ appInfos.add(getAppInfo(app)); } } break; case FILTER_SDCARD_APP: // 安裝在SDCard的應用程序 appInfos.clear(); for (ApplicationInfo app : listAppcations) { if ((app.flags & ApplicationInfo.FLAG_EXTERNAL_STORAGE) != 0) { appInfos.add(getAppInfo(app)); } } return appInfos; default: return null; } return appInfos; } // 構造一個AppInfo對象 ,並賦值 private AppInfo getAppInfo(ApplicationInfo app) { AppInfo appInfo = new AppInfo(); appInfo.setAppLabel((String) app.loadLabel(pm)); appInfo.setAppIcon(app.loadIcon(pm)); appInfo.setPkgName(app.packageName); return appInfo; } }
你可以在此基礎上,構建更多豐富的應用。比說說Settings模塊中的卸載安裝應用程序等。
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