android - 以编程方式安装/卸载 APK(PackageManager 与 Intents)

Question

我的应用程序安装了其他应用程序，它需要跟踪它安装了哪些应用程序。当然，这可以通过简单地保存已安装应用程序的列表来实现。但这不应该是必要的!维护 installedBy(a, b) 关系应该是 PackageManager 的责任。实际上，根据 API 是:

公共(public)抽象字符串 getInstallerPackageName(String packageName) -检索安装包的应用程序的包名。这可以确定包裹来自哪个市场。

目前的做法

使用 Intent 安装 APK

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
startActivity(intent);

使用 Intent 卸载 APK:

Intent intent = new Intent(Intent.ACTION_DELETE, Uri.fromParts("package",
getPackageManager().getPackageArchiveInfo(apkUri.getPath(), 0).packageName,null));
startActivity(intent);

这显然不是方式，例如Android Market 安装/卸载软件包。他们使用更丰富的 PackageManager 版本。这可以通过从 Android Git 存储库下载 Android 源代码来查看。下面是与 Intent 方法相对应的两个隐藏方法。不幸的是，外部开发人员无法使用它们。但也许他们会在未来？

更好的方法

使用 PackageManager 安装 APK

/**
 * @hide
 * 
 * Install a package. Since this may take a little while, the result will
 * be posted back to the given observer.  An installation will fail if the calling context
 * lacks the {@link android.Manifest.permission#INSTALL_PACKAGES} permission, if the
 * package named in the package file's manifest is already installed, or if there's no space
 * available on the device.
 *
 * @param packageURI The location of the package file to install.  This can be a 'file:' or a
 * 'content:' URI.
 * @param observer An observer callback to get notified when the package installation is
 * complete. {@link IPackageInstallObserver#packageInstalled(String, int)} will be
 * called when that happens.  observer may be null to indicate that no callback is desired.
 * @param flags - possible values: {@link #INSTALL_FORWARD_LOCK},
 * {@link #INSTALL_REPLACE_EXISTING}, {@link #INSTALL_ALLOW_TEST}.
 * @param installerPackageName Optional package name of the application that is performing the
 * installation. This identifies which market the package came from.
 */
public abstract void installPackage(
        Uri packageURI, IPackageInstallObserver observer, int flags,
        String installerPackageName);

使用 PackageManager 卸载 APK

/**
 * Attempts to delete a package.  Since this may take a little while, the result will
 * be posted back to the given observer.  A deletion will fail if the calling context
 * lacks the {@link android.Manifest.permission#DELETE_PACKAGES} permission, if the
 * named package cannot be found, or if the named package is a "system package".
 * (TODO: include pointer to documentation on "system packages")
 *
 * @param packageName The name of the package to delete
 * @param observer An observer callback to get notified when the package deletion is
 * complete. {@link android.content.pm.IPackageDeleteObserver#packageDeleted(boolean)} will be
 * called when that happens.  observer may be null to indicate that no callback is desired.
 * @param flags - possible values: {@link #DONT_DELETE_DATA}
 *
 * @hide
 */
public abstract void deletePackage(
        String packageName, IPackageDeleteObserver observer, int flags);

区别

• 当使用 Intent 时，本地包管理器不知道安装源自哪个应用程序。具体来说，getInstallerPackageName(...) 返回 null。

• 隐藏方法 installPackage(...) 将安装程序包名称作为参数，并且很可能能够设置此值。

问题

是否可以使用 Intent 指定包安装程序名称？(也许安装程序包的名称可以作为安装 Intent 的额外添加？)

提示:如果您想下载 Android 源代码，您可以按照此处描述的步骤操作:下载源代码树。要提取 *.java 文件并根据包层次将它们放在文件夹中，您可以查看这个简洁的脚本:View Android Source Code in Eclipse .

Answer 1

Android P+ 在 AndroidManifest.xml 中需要此权限

<uses-permission android:name="android.permission.REQUEST_DELETE_PACKAGES" />

然后:

Intent intent = new Intent(Intent.ACTION_DELETE);
intent.setData(Uri.parse("package:com.example.mypackage"));
startActivity(intent);

卸载。似乎更容易...