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Updating the
AndroidManifest.xml
 File

Update your
AndroidManifest.xml
 file to enable a large heap size and the required permissions for the Default UI. Enabling a large heap size is necessary in order to accommodate situations in which an update of your terminals is required, and for which larger chunks of data are requested and transferred.
WARNING
Do not enable automatic backup in your app's
AndroidManifest
 file. The Tap to Pay on Android SDK uses the Android Keystore to install and store cryptographic keys in your app. Using automatic backup restores the default encryption preferences and causes a functionality error in the Tap to Pay on Android SDK.
Follow these steps to update your
AndroidManifest.xml
 file:
  1. Set the
    android:allowBackup
     attribute to
    false
     and the
    android:largeHeap
     attribute to
    true
    .
    <application
    ...
    android:allowBackup="false"
    android:largeHeap="true"
    >
    ...
</application>
  2. Enable the needed permissions for the Default UI.
    <manifest ... >
    ...
    <!-- Needed for Default UI ! -->
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>                   
    ...
</manifest>