Android獲取應用資訊(AndroidManifest)

摘要： 主要利用兩個資訊類：PackageInfo、ApplicationInfo 一、獲取應用PackageInfo資訊 以下packageManager都用這個表示 PackageManager packageManager = context.getPackageMa...

主要利用兩個資訊類：PackageInfo、ApplicationInfo

一、獲取應用PackageInfo資訊

以下packageManager都用這個表示

PackageManager packageManager = context.getPackageManager()；

獲取方式

==獲取不同資訊主要是傳入不同的flag值==

//第一個引數傳入應用包名，
//第二個引數是一個flag表示你想要獲取哪些資訊，比如下例的activity資訊及activity標籤下的metadata資訊
PackageInfo packageInfo = packageManager.getPackageInfo(packageName, PackageManager.GET_ACTIVITIES | PackageManager.GET_META_DATA)；

具體資訊獲取

1、許可權資訊(AndroidManifest中<uses-permission/>標籤中資訊列表)

String[] permisions = packageManager.getPackageInfo(packageName, PackageManager.GET_PERMISSIONS).requestedPermissions；

2、版本資訊

PackageInfo packageInfo = packageManager.getPackageInfo(packageName, 0)；
String versionName = packageInfo.versionName；
int versionCode = packageInfo.versionCode；

3、其他資訊

比如sharedUserId、packageName等等

二、獲取ApplicationInfo資訊

獲取方式

//由上述packageInfo中獲取得到
ApplicationInfo applicationInfo = packageInfo.applicationInfo；

具體資訊獲取

1、應用名稱

String appName = (String) applicationInfo.loadLabel(packageManager);

2、應用圖示

Drawable appIcon = applicationInfo.loadIcon(packageManager)；

3、其他資訊

比如taskAffinity、processName、theme等

三、獲取元件資訊(ActivityInfo、ServiceInfo、ProviderInfo)

ActvitityInfo

==Activity或者BroadcastReceiver資訊都是通過ActivityInfo獲取的==

獲取方式

//flag值必須包含PackageManager.GET_ACTIVITIES，如果還要獲取其他資訊如metadata則增加一個flag值PackageManager.GET_META_DATA
PackageInfo packageInfo = packageManager.getPackageInfo(packageName,PackageManager.GET_ACTIVITIES);
//activity資訊
ActivityInfo[] activities = packageInfo.activities;

//flag值必須包含PackageManager.GET_RECEIVERS，如果還要獲取其他資訊如metadata則增加一個flag值PackageManager.GET_META_DATA
PackageInfo packageInfo = packageManager.getPackageInfo(packageName,PackageManager.GET_RECEIVERS);
//broadcastreceiver資訊
ActivityInfo[] receivers = packageInfo.receivers

具體資訊獲取

1、activity全路徑

String activityClassName = activityInfo.name;

2、其他資訊

比如theme、launchMode、taskAffinity等

ServiceInfo

Service資訊通過ServiceInfo獲取

獲取方式

//flag值必須包含PackageManager.GET_SERVICES，如果還要獲取其他資訊如metadata則增加一個flag值PackageManager.GET_META_DATA
PackageInfo packageInfo = packageManager.getPackageInfo(packageName,PackageManager.GET_SERVICES);
ServiceInfo[] services = packageInfo.services;

具體資訊獲取

比如flags、permission

ProviderInfo

ContentProvider資訊通過ProviderInfo獲取

獲取方式

//flag值必須包含PackageManager.GET_PROVIDERS，如果還要獲取其他資訊如metadata則增加一個flag值PackageManager.GET_META_DATA
PackageInfo packageInfo = packageManager.getPackageInfo(packageName,PackageManager.GET_PROVIDERS);
ServiceInfo[] services = packageInfo.services;

具體資訊獲取

比如authority、readPermission、writePermission等

四、使用例項

1、根據包名獲取應用資訊

//首先獲取packageManager
PackageManager packageManager = context.getPackageManager();
//獲取packageInfo資訊
PackageInfo packageInfo = packageManager.getPackageInfo(packageName, 0);
//獲取應用版本號
int versionCode = packageInfo.versionCode;
//獲取應用版本名
String versionName = packageInfo.versionName;
//獲取應用名稱
String appName = (String) packageInfo.applicationInfo.loadLabel(packageManager);
//獲取應用圖示
Drawable appIcon = packageInfo.applicationInfo.loadIcon(packageManager)

//<application/>標籤下metadata獲取
ApplicationInfo applicationInfo = packageManager.getApplicationInfo(packageName, PackageManager.GET_META_DATA);
Bundle metadata = applicationInfo.metaData;//然後通過改bundle獲取相應值，用法見bundle

//<activity/>標籤下metadata獲取(其他service\receiver\provider同理，切換flag即可)
//入口資訊獲取
PackageInfo packageInfo = packageManager.getPackageInfo(packageName, PackageManager.GET_ACTIVITIES | PackageManager.GET_META_DATA);
ActivityInfo[] activityInfos = packageInfo.activities;
for (ActivityInfo activityInfo : activityInfos) {
Bundle metadata = activityInfo.metaData;//然後通過改bundle獲取相應值，用法
見bundle
String activityClassName = activityInfo.name;
}

2、擴充套件（直接獲取未安裝apk資訊）

PackageManager packageManager = context.getPackageManager();
//apkPath傳入apk絕對路徑
PackageInfo pInfo = packageManager.getPackageArchiveInfo(apkPath, PackageManager.GET_ACTIVITIES);
if (pInfo != null) {
//包名
String packageName = pInfo.packageName;
//版本名
String versionCode = pInfo.versionName;
//版本號
String versionCode = pInfo.versionCode;
ApplicationInfo appInfo = pInfo.applicationInfo;
/** 必須加這兩句，不然下面icon獲取是default icon而不是應用包的icon */
appInfo.sourceDir = apkPath;
appInfo.publicSourceDir = apkPath;
//應用名
String appName = appInfo.loadLabel(packageManager).toString();
//應用圖示
Drawable appIcon = packageManager.getApplicationIcon(appInfo);
//...其他資訊同上獲取已安裝應用資訊一樣
}

3、根據包名開啟應用LauncherActivity

public static void openApplication(Context context, String packageName) throws Exception {
Intent launcherIntent = new Intent("android.intent.action.MAIN", null);
launcherIntent.addCategory("android.intent.category.LAUNCHER");
launcherIntent.setPackage(packageName);
ResolveInfo localResolveInfo = (ResolveInfo) context.getPackageManager()
.queryIntentActivities(launcherIntent, 0).iterator().next();
if (localResolveInfo != null) {
String str = localResolveInfo.activityInfo.name;
Intent targetIntent = new Intent(Intent.ACTION_MAIN);
targetIntent.addCategory(Intent.CATEGORY_LAUNCHER);
targetIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
targetIntent.setComponent(new ComponentName(packageName, str));
context.startActivity(localIntent2);
}

4、獲取所有已安裝應用資訊

PackageManager packageManager = mContext.getPackageManager();
List<PackageInfo> mPacks = packageManager.getInstalledPackages(0);
for(PackageInfo packageInfo : mPacks) {
//是否是系統應用
boolean isUserApp = (packageInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0;
//...同上獲取其他資訊
}

5、獲取應用大小資料

packageManager.getPackageSizeInfo(packageName, new IPackageStatsObserver.Stub() {
@Override
public void onGetStatsCompleted(PackageStats packageStats, boolean b) throws RemoteException {
String package = packageStats.packageName;
long totalSize = packageStats.cacheSize + packageStats.codeSize + packageStats.dataSize;
});