Android中对已安装应用的管理实现

public class AppInfo {

    private String name ;//应用名称

    private String packageName ;//应用包名

    private Drawable icon ;//应用图标

    private long firstInstallTime ;//应用第一次安装的时间

    private String versionName ;//应用的版本名称

    public String getName() {

        return name;

    }

    public String getPackageName() {

        return packageName;

    }

    public Drawable getIcon() {

        return icon;

    }

    public long getFirstInstallTime() {

        return firstInstallTime;

    }

    public String getVersionName() {

        return versionName;

    }

    public AppInfo(String name, String packageName, Drawable icon, long firstInstallTime, String versionName) {

        this.name = name;

        this.packageName = packageName;

        this.icon = icon;

        this.firstInstallTime = firstInstallTime;

        this.versionName = versionName;

    }

}

public static List<AppInfo> getAppInfos(Context context){

        List<AppInfo> appInfoList = new ArrayList<>() ;

        //获取包管理器

        PackageManager pm = context.getPackageManager();

        //获取已安装的包信息

        List<PackageInfo> packageInfos = pm.getInstalledPackages(0);

        for(PackageInfo packageInfo : packageInfos){

            //获取包名

            String packageName = packageInfo.packageName;

            //获取应用图标

            Drawable icon = packageInfo.applicationInfo.loadIcon(pm);

            //获取应用的名称

            String name = packageInfo.applicationInfo.loadLabel(pm).toString();

            //获取第一次安装的时间

            long firstInstallTime = packageInfo.firstInstallTime;

            //获取版本号

            int versionCode = packageInfo.versionCode;

            //获取版本名称

            String versionName = packageInfo.versionName;

            AppInfo appInfo = new AppInfo(name,packageName,icon,firstInstallTime,versionName);

            appInfoList.add(appInfo);

        }

        return appInfoList ;

    }

public static void openApplication(Context context,String packageName) {

        Intent intent=isexit(context,packageName);

        if(intent==null){

            System.out.println("APP not found!....:"+packageName);

        }

        context.startActivity(intent);

    }

    /**

     * 通过packagename判断应用是否安装

     * @param context

     *

     * @return 跳转的应用主activity Intent

     * */

    public static Intent isexit(Context context,String pk_name){

        //获取包管理器

        PackageManager packageManager = context.getPackageManager();

        //通过包名获取Intent

        Intent it= packageManager.getLaunchIntentForPackage(pk_name);

        return it;

    }

public static void showInstalledAppDetails(Context context, String packageName) {

        Intent intent = new Intent();

        final int apiLevel = Build.VERSION.SDK_INT;

        if (apiLevel >= 9) { // 2.3（ApiLevel 9）以上，使用SDK提供的接口

            intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);

            Uri uri = Uri.fromParts("package", packageName, null);

            intent.setData(uri);

        } else { // 2.3以下，使用非公开的接口（查看InstalledAppDetails源码）

            // 2.2和2.1中，InstalledAppDetails使用的APP_PKG_NAME不同。

            final String appPkgName = (apiLevel == 8 ? "pkg"

                    : "com.android.settings.ApplicationPkgName");

            intent.setAction(Intent.ACTION_VIEW);

            intent.setClassName("com.android.settings",

                    "com.android.settings.InstalledAppDetails");

            intent.putExtra(appPkgName, packageName);

        }

        context.startActivity(intent);

    }

public static void uninstallApplication(Context context,String packageName){

        Intent intent = new Intent() ;

        intent.setAction("android.intent.action.DELETE");

        intent.addCategory("android.intent.category.DEFAULT");

        intent.setData(Uri.parse("package:"+packageName));

        context.startActivity(intent);

    }