Android Project Combat (40): Andoird 7.0+ Install APK adapter

Original: Android Project Combat (40): Andoird 7.0+ Install APK adapter

　　

First look at the code to install the APK file

  　　  /** * Install apk with implicit intent to invoke system installer*/     Public Static voidInstall (context context) {Intent Intent=NewIntent (intent.action_view);intent.setflags (Intent.flag_activity_new_task); Intent.setdataandtype (Uri.fromfile (NewFile (Environment.getexternalstoragepublicdirectory (environment.directory_downloads),"xxxx. apk")),                "application/vnd.android.package-archive");    Context.startactivity (Intent); }

　　

The test found that the code on the 7.0 model can successfully open the specified path under the specified APK file, but on the 7.0+ model calls the code will be error:

ANDROID.OS.FILEURIEXPOSEDEXCEPTION:FILE:///STORAGE/EMULATED/0/DOWNLOAD/XXXX.APK exposed beyond app through Intent.getdata ()

The reason:Android 7.0 is starting to prohibit exposing the file://URI to your app. If a Intent that contains the file file://URI type leaves your app, the app fails with an fileuriexposedexception exception.

　　Workaround:

　　One, add one of the four components in the Androidmanifest.xml file <provider>

　　　　

<!--suitable for 7.0APK Installation-<provider Android:name="Android.support.v4.content.FileProvider"android:authorities="Com.xxx.xxxx.fileprovider" android:granturipermissions="true"android:exported="false"> <!--metadata-<meta-Data Android:name="Android.support.FILE_PROVIDER_PATHS"Android:resource="@xml/file_paths"/> </provider>

Note that the com.xxx.xxxx in the value of the Android:authorities property here is your package name and cannot be filled in arbitrarily

　Second, the Res directory to build an XML file, and create a new XML file File_paths.xml

　　　　Note that the file name matches the value of the resource property in the first step

The contents are:

<?xml version="1.0" encoding="utf-8"?><paths>    <external-path path=".  "name="download"/></paths>

　　

　Three, according to the model's Android system level to perform different installation apk code

　　　　　 Note that according to the system version to execute different code, 7.0 the following call 7.0+ code will error, 7.0+ call 7.0 or less will be an error.

if(file!=NULL) {//file-apk file Intent Intent=NewIntent (Intent.action_view); //since no activity is initiated in the activity environment, the following label is setintent.setflags (Intent.flag_activity_new_task); if(build.version.sdk_int>= -) {//is the interpretation version above 7.0 ?//Parameter 1 context, parameter 2 provider the host address and the configuration file remain consistent with parameter 3 shared filesUri Apkuri =fileprovider.geturiforfile (Context,"Com.xxx.xxxxx.fileprovider", file); //Add this sentence to indicate the file that the URI represents for temporary authorization to the target appintent.addflags (intent.flag_grant_read_uri_permission); Intent.setdataandtype (Apkuri,"application/vnd.android.package-archive"); }Else{intent.setdataandtype (uri.fromfile (file),"application/vnd.android.package-archive");            } context.startactivity (Intent); }

Android Project Combat (40): Andoird 7.0+ Install APK adapter