Android开发中apk安装包常用工具，androidapk,开发项目中用到的有关获取

Android开发中apk安装包常用工具，androidapk,开发项目中用到的有关获取

开发项目中用到的有关获取apk信息的工具类，在做版本升级的时候一般都需要用到部分方法，做点笔记：```javapublic class AppUtil { /**

 *根据应用包名（package name）启动应用    *参数分别是上下文context和应用包名：pkgName      */public static boolean startApkByPkgName(Context context, String pkgName) {    PackageManager packageManager = context.getPackageManager();    Intent intent = new Intent();    intent = packageManager.getLaunchIntentForPackage(pkgName);    if (intent == null) {        System.out.println("APP not found!");        return false;    }    context.startActivity(intent);    return true;}/** * 根据apk文件路径得到app信息 */public static ApplicationInfo getApkInfoByPath(Context context,String absPath) {    ApplicationInfo appInfo = null;    PackageManager pm = context.getPackageManager();    PackageInfo pkgInfo = pm.getPackageArchiveInfo(absPath,PackageManager.GET_ACTIVITIES);    if (pkgInfo != null) {        appInfo = pkgInfo.applicationInfo;        /* 必须加这两句，不然下面icon获取是default icon而不是应用包的icon */        appInfo.sourceDir = absPath;        appInfo.publicSourceDir = absPath;    }    return appInfo;}/** *根据apk应用包名得到应用信息 */public static PackageInfo getApkInfoByPkgName(Context context, String pkgName) {    PackageInfo pkgInfo = null;    PackageManager pm = context.getPackageManager();    try {        // 0代表是获取版本信息        pkgInfo = pm.getPackageInfo(pkgName, 0);    } catch (NameNotFoundException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }    return pkgInfo;}/** *根据apk文件路径得到应用信息 */public static PackageInfo getPkgInfoByPath(Context context, String absPath) {    PackageInfo pkgInfo = null;    PackageManager pm = context.getPackageManager();    pkgInfo = pm.getPackageArchiveInfo(absPath,            PackageManager.GET_ACTIVITIES);    return pkgInfo;}/** *根据apk路径直接跳到安装界面 */public static void installApkByPath(Context context, String absPath) {    Intent intent = new Intent(Intent.ACTION_VIEW);    intent.setDataAndType(Uri.parse("file://" + absPath),            "application/vnd.android.package-archive");    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);    context.startActivity(intent);}

/
根据apk包名卸载应用
/ public static void uninstallApk(Context context, String packageName) { String uriString = "package:" + packageName; Uri uninstallUrl = Uri.parse(uriString); Intent intent = new Intent(Intent.ACTION_DELETE, uninstallUrl); context.startActivity(intent); }

public static List<ResolveInfo> queryAppInfo(Context context,        String packageName) {    PackageManager pm = context.getPackageManager(); // 获得PackageManager对象    Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);    mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);    mainIntent.setPackage(packageName);    // 通过查询，获得所有ResolveInfo对象.    List<ResolveInfo> resolveInfos = pm.queryIntentActivities(mainIntent,            PackageManager.GET_INTENT_FILTERS);    return resolveInfos;}  /**    *根据名名获取版本信息   */public static int getInstalledAppVersionCode(Context context, String pkgName) {    int versionCode = -1;    PackageInfo pkgInfo = AppUtil.getPkgInfoByName(context, pkgName);    if (pkgInfo != null) {        versionCode = pkgInfo.versionCode;    }    return versionCode;}

}

```