使用Intent安装apk的方法

Install and Uninstall Android applications with Android PackageInstaller

 

This is actually very simple.

See PackageInstaller code here:http://android.git.kernel.org/?p=platform/packages/apps/PackageInstaller.git;a=tree;h=refs/heads/donut;hb=refs/heads/donut

Intent filters for such actions are:

<activity android:name=".PackageInstallerActivity">

    <intent-filter>

        <action android:name="android.intent.action.VIEW" />

        <category android:name="android.intent.category.DEFAULT" />

        <data android:scheme="content" />

        <data android:scheme="file" />

        <data android:mimeType="application/vnd.android.package-archive" />

    </intent-filter>

</activity>

<activity android:name=".UninstallerActivity">

    <intent-filter>

        <action android:name="android.intent.action.VIEW" />

        <action android:name="android.intent.action.DELETE" />

        <category android:name="android.intent.category.DEFAULT" />

        <data android:scheme="package" />

    </intent-filter>

</activity

so if you want to install your .apk file from SD card – just write something like that:

String fileName = Environment.getExternalStorageDirectory() + "/myApp.apk";

Intent intent = new Intent(Intent.ACTION_VIEW);

intent.setDataAndType(Uri.fromFile(new File(fileName)), "application/vnd.android.package-archive");

startActivity(intent);

for uninstallation:

Uri packageURI = Uri.parse("package:com.android.myapp");

Intent uninstallIntent = new Intent(Intent.ACTION_DELETE, packageURI);

startActivity(uninstallIntent)

be aware that by default INSTALL_NON_MARKET_APPS option is disabled. You may want to check this option and show user friendly dialog before trying to install the app:

int result = Settings.Secure.getInt(getContentResolver(), Settings.Secure.INSTALL_NON_MARKET_APPS, 0);

if (result == 0) {

    // show some dialog here

    // ...

    // and may be show application settings dialog manually

    Intent intent = new Intent();

    intent.setAction(Settings.ACTION_APPLICATION_SETTINGS);

    startActivity(intent);

}

if you want to uninstall your app by default from Pakage Manager then remove the category.DEFAULT line from uninstall app AndroidManifest.xml

 应用软件经常会因为功能的增加而升级，升级经常是在客户端给用户升级的提示，然后用户下载最新的apk程序包，软件升级过程大多数需要在线完成。 
 android 在线安装apk程序包，主要用到系统自带的apk安装器进行安装。用到系统自带的apk安装器安装apk包，首先需要在配置文件中加入权限声明

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