PayPal Android SDK
The PayPal Android SDK provides a software library that makes it easy for Android developers to accept both credit cards and PayPal directly within native mobile apps.
For usage and integration instructions, see the PayPal Android SDK Integration Guide.
For detailed reference, see the SDK reference.
Older libraries
PayPal is replacing the Mobile Payments Libraries (MPL) with the PayPal iOS/Android SDK. The PayPal iOS/Android SDK is currently available in the US, with more country support coming soon. US developers should upgrade now for more features and a better mobile experience. Non-US developers can continue to use MPL for the time being. Issues related to MPL should be filed in the sdk-packages repo.
Developers with existing Express Checkout integrations or who want additional features such as authorization and capture, may wish to use Mobile Express Checkout in a webview.