制定一个apk路径 然后跳出安装界面

制定一个apk的路径 然后跳出界面让用户选择是否安装

• 我们系统有一个写好的Activity来协助我们完成这一功能
• 我们来看看它的清单文件

  <?xml version="1.0" encoding="utf-8" ?>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.android.packageinstaller">
  <original-package android:name="com.android.packageinstaller" />
  <uses-permission android:name="android.permission.INSTALL_PACKAGES" />
  <uses-permission android:name="android.permission.DELETE_PACKAGES" />
  <uses-permission android:name="android.permission.CLEAR_APP_CACHE" />
  <uses-permission android:name="android.permission.READ_PHONE_STATE" />
  <uses-permission android:name="android.permission.CLEAR_APP_USER_DATA" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.WAKE_LOCK" />
  <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
  <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
- <application android:label="@string/app_name" android:icon="@drawable/apk_new">
- <activity android:name=".PackageInstallerActivity" android:configChanges="orientation|keyboardHidden" android:theme="@style/Theme.Transparent">
- <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=".InstallAppProgress" android:configChanges="orientation|keyboardHidden" android:theme="@android:style/Theme.Dialog" />
- <activity android:name=".UninstallerActivity" android:configChanges="orientation|keyboardHidden" android:theme="@style/Theme.Transparent">
- <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>
  <activity android:name=".UninstallAppProgress" android:configChanges="orientation|keyboardHidden" android:theme="@android:style/Theme.Dialog" />
  </application>
  </manifest>

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我们这里使用.PackageInstallerActivity 其他卸载案例可以对照以上清单文件

Intent intent = new Intent(Intent.ACTION_VIEW);
//arg0.result 一个File类型          

intent.setDataAndType(Uri.fromFile(arg0.result),"application/vnd.android.package-archive");
                            startActivityForResult(intent, 20);