Add liberapay link

app/src/main/java/fr/gouv/etalab/mastodon/activities/AboutActivity.java

@@ -162,6 +162,16 @@ public class AboutActivity extends BaseActivity implements OnRetrieveRemoteAccou
             }
         });
 
+
+        Button about_support = findViewById(R.id.about_support);
+        about_support.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://liberapay.com/tom79/donate"));
+                startActivity(browserIntent);
+            }
+        });
+
         setTitle(R.string.action_about);
         lv_contributors.setExpanded(true);
         lv_developers.setExpanded(true);

app/src/main/res/layout-sw600dp/activity_about.xml

@@ -69,6 +69,16 @@
             android:divider="@null"
             android:scrollbars="none"/>
 
+        <Button
+            android:id="@+id/about_support"
+            android:layout_gravity="center"
+            android:gravity="center"
+            style="@style/Base.Widget.AppCompat.Button.Colored"
+            android:text="@string/support_the_app_on_liberapay"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            />
+
         <TextView
             android:id="@+id/about_wiki"
             android:layout_gravity="center"

app/src/main/res/layout/activity_about.xml

@@ -63,6 +63,16 @@
             android:scrollbars="none"
             android:divider="@null"/>
 
+        <Button
+            android:id="@+id/about_support"
+            android:layout_gravity="center"
+            android:gravity="center"
+            style="@style/Base.Widget.AppCompat.Button.Colored"
+            android:text="@string/support_the_app_on_liberapay"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            />
+
         <TextView
             android:id="@+id/about_wiki"
             android:layout_gravity="center"

app/src/main/res/values/strings.xml

@@ -535,6 +535,7 @@
     <string name="set_theme">Theme:</string>
     <string name="set_compact_mode">Compact mode</string>
     <string name="set_share_details">Add toot details when sharing</string>
+    <string name="support_the_app_on_liberapay">Support the app on Liberapay</string>
     <string-array translatable="false" name="proxy_type_choice">
         <item>HTTP</item>
         <item>SOCKS</item>