Update readme, version, config files

AndroidManifest.xml

@@ -7,7 +7,7 @@
 
     <uses-sdk
         android:minSdkVersion="16"
-        android:targetSdkVersion="27"/>
+        android:targetSdkVersion="28"/>
 
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.RECORD_AUDIO"/>

AndroidManifestSdk.xml

@@ -7,5 +7,5 @@
 
     <uses-sdk
         android:minSdkVersion="16"
-        android:targetSdkVersion="27"/>
+        android:targetSdkVersion="28"/>
 </manifest>

README.md

@@ -6,11 +6,11 @@ Linphone is a free VoIP and video softphone based on the SIP protocol.
 
 ## To build liblinphone for Android, you must:
 
-1. Download the Android sdk (API 26.0.1 at max) with platform-tools and tools updated to latest revision, then add both 'tools' and 'platform-tools' folders in your path and the android-sdk folder to ANDROID_HOME environment variable.
+1. Download the Android sdk (API 28.0.0 at max) with platform-tools and tools updated to latest revision, then add both 'tools' and 'platform-tools' folders in your path and the android-sdk folder to ANDROID_HOME environment variable.
 
-2. Download the Android ndk (version r11c or 15) from google and add it to your path (no symlink !!!) and ANDROID_NDK environment variable.
+2. Download the Android ndk (version 16) from google and add it to your path (no symlink !!!) and ANDROID_NDK environment variable.
 
-3. Install _yasm_, _nasm_ (For OpenH224 support only), _python_, _pkg_config_ and _cmake(>=3.7)_.
+3. Install _yasm_, _nasm_ (For OpenH224 support only), _python_, _pkg_config_ and _cmake(>=3.10)_.
   * On 64 bits linux systems you'll need the _ia32-libs_ package.
   * With the latest Debian (multiarch), you need this:
     * `dpkg --add-architecture i386`
@@ -67,11 +67,6 @@ You can speed up the compilation by using ccache (compiler cache, see [ccache.sa
 To enable firebase in Linphone, just add your 'google-service.json' in project root, add your key at 'push_sender_id' and add 'firebase' at 'push_type' in 'res/values/non_localizable_custom.xml'
 Be sure to have all services for Firebase in your 'AndroidManifest.xml'
 
-## Google
-
-To enable google push in Linphone, remove 'google-service.json' file if it exist, add your key at 'push_sender_id' and add 'google' at 'push_type' in 'res/values/non_localizable_custom.xml'
-Be sure to have every permissions and services for GCM in your 'AndroidManifest.xml'
-
 # TROUBLESHOOTING
 
 If you encounter the following issue:

build.gradle

@@ -78,8 +78,8 @@ excludePackage.add('**/LICENSE.txt')
 
 android {
     defaultConfig {
-        compileSdkVersion 26
+        compileSdkVersion 28
-        buildToolsVersion "27.0.3"
+        buildToolsVersion "28.0.0"
         applicationId getPackageName()
         multiDexEnabled true
 

liblinphone-sdk/AndroidManifestLibrary.xml

@@ -2,10 +2,10 @@
 <manifest package="org.linphone.core"
           xmlns:android="http://schemas.android.com/apk/res/android"
           android:installLocation="auto"
-          android:versionCode="3320"
+          android:versionCode="4001"
-          android:versionName="3.3.2">
+          android:versionName="4.0.0">
 
     <uses-sdk
         android:minSdkVersion="16"
-        android:targetSdkVersion="26"/>
+        android:targetSdkVersion="28"/>
 </manifest>

liblinphone-sdk/build.gradle

@@ -72,8 +72,8 @@ android {
     }
 
     defaultConfig {
-        compileSdkVersion 26
+        compileSdkVersion 28
-        buildToolsVersion "27.0.3"
+        buildToolsVersion "28.0.0"
         multiDexEnabled true
     }