android - 如何在安卓设备上下载并安装另一个安卓应用

Question

有没有办法以编程方式从 URL 下载和安装另一个 Android 应用程序？我试着跟随

Intent promptInstall = new Intent(Intent.ACTION_VIEW);

    promptInstall.setDataAndType(Uri.fromFiledwfile), "application/vnd.android.package_archive");
    promptInstall.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    startActivity(promptInstall);

但它给了我错误

   java.lang.RuntimeException: Unable to start activity 
ComponentInfo{com.example.test/com.example.test.MainActivity}: 

android.content.ActivityNotFoundException: No Activity found to handle Intent { 

act=android.intent.action.VIEW dat=file:///mnt/sdcard/download/Demo.apk 

typ=application/vnd.android.package_archive flg=0x10000000 }

我是否缺少某些权限？我试着给

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

但这不允许我在 eclipse 中编译

如果我做错了什么，有人可以帮忙告诉我吗

谢谢蒙蒂

Answer 1

没有用户确认，您无法安装应用。

一旦你下载了 apk，你应该使用 ACTION_INSTALL_PACKAGE而不是 ACTION_VIEW

来自文档:

Activity Action: Launch application installer.

Input: The data must be a content: or file: URI at which the application can be retrieved. As of JELLY_BEAN_MR1, you can also use "package:" to install an application for the current user that is already installed for another user. You can optionally supply EXTRA_INSTALLER_PACKAGE_NAME, EXTRA_NOT_UNKNOWN_SOURCE, EXTRA_ALLOW_REPLACE, and EXTRA_RETURN_RESULT.

Output: If EXTRA_RETURN_RESULT, returns whether the install succeeded.