程序大概分成三个部分:
1:获取手机已安装的所有应用package的信息(其中包括用户自己安装的,还有系统自带的);
2:滤除系统自带应用;
3:通过列表显示出应用程序的图标和其他文字信息(如应用名称,包名称package name,版本号等)
首先定义一个数据结构,来保存Android获得应用信息(icon,name,packageName,versionName,versionCode等)
下面我们看看代码,这样我们大家看的更直观一些:
public class AppInfo {
public String appName="";
public String packageName="";
public String versionName="";
public int versionCode=0;
public Drawable appIcon=null;
public void print(){
Log.v("app","Name:"+appName+" Package:"+packageName);
Log.v("app","Name:"+appName+" versionName:"+versionName);
Log.v("app","Name:"+appName+" versionCode:"+versionCode);
}
}
然后我们通过PackageManager来获取已安装的应用包信息。
好ArrayList<APPINFO> appList = new ArrayList<APPINFO>(); //用来存储获取的应用信息数据
List<PACKAGEINFO> packages = getPackageManager().getInstalledPackages(0);
for(int i=0; i < packages.size(); i++) {
PackageInfo packageInfo = packages.get(i);
AppInfo tmpInfo = new AppInfo();
tmpInfo.appName = packageInfo.applicationInfo.loadLabel(getPackageManager()).toString();
tmpInfo.packageName = packageInfo.packageName;
tmpInfo.versionName = packageInfo.versionName;
tmpInfo.versionCode = packageInfo.versionCode;
tmpInfo.appIcon = packageInfo.applicationInfo.loadIcon(getPackageManager());
appList.add(tmpInfo);
}了,这下手机上安装的应用数据都存在appList里了。那么如何判断一个应用是否为系统应用呢?
if ((packageInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM)==0) {
//非系统应用
}
else{
//系统应用
}
所以如果只需要获取到非系统应用信息,代码如下:
ArrayList<APPINFO> appList = new ArrayList<APPINFO>(); //用来存储获取的应用信息数据
List<PACKAGEINFO> packages = getPackageManager().getInstalledPackages(0);
for(int i=0; i < packages.size(); i++) {
PackageInfo packageInfo = packages.get(i);
AppInfo tmpInfo = new AppInfo();
tmpInfo.appName = packageInfo.applicationInfo.loadLabel(getPackageManager()).toString();
tmpInfo.packageName = packageInfo.packageName;
tmpInfo.versionName = packageInfo.versionName;
tmpInfo.versionCode = packageInfo.versionCode;
tmpInfo.appIcon = packageInfo.applicationInfo.loadIcon(getPackageManager());
if ((packageInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM)==0) {
appList.add(tmpInfo);//如果非系统应用,则添加至appList
}
}