implement passing a URI to open inside the application

Supported URI schemes will also be added to the .desktop file for --install

The URI is passed as named parameter --uri. This allows us to use unnamed parameters
for split APK apps in the future

src/api-impl/android/app/Activity.java

@@ -50,11 +50,13 @@ public class Activity extends ContextThemeWrapper implements Window.Callback {
 	 * @return  instance of main activity class
 	 * @throws Exception 
 	 */
-	private static Activity createMainActivity(String className, long native_window) throws Exception {
+	private static Activity createMainActivity(String className, long native_window, String uriString) throws Exception {
+		Uri uri = uriString != null ? Uri.parse(uriString) : null;
 		if (className == null) {
 			for (PackageParser.Activity activity: pkg.activities) {
 				for (PackageParser.IntentInfo intent: activity.intents) {
-					if (intent.hasCategory("android.intent.category.LAUNCHER")) {
+					if ((uri == null && intent.hasCategory("android.intent.category.LAUNCHER")) ||
+						(uri != null && intent.hasDataScheme(uri.getScheme()))) {
 						className = activity.className;
 						break;
 					}
@@ -65,10 +67,16 @@ public class Activity extends ContextThemeWrapper implements Window.Callback {
 		} else {
 			className = className.replace('/', '.');
 		}
+		if (className == null) {
+			System.err.println("Failed to find Activity to launch URI: " + uri);
+			System.exit(1);
+		}
 		Class<? extends Activity> cls = Class.forName(className).asSubclass(Activity.class);
 		Constructor<? extends Activity> constructor = cls.getConstructor();
 		Activity activity = constructor.newInstance();
 		activity.window.native_window = native_window;
+		if (uri != null)
+			activity.setIntent(new Intent("android.intent.action.VIEW", uri));
 		return activity;
 	}
 
@@ -467,7 +475,9 @@ public class Activity extends ContextThemeWrapper implements Window.Callback {
 		finish();
 	}
 
-	public void setIntent(Intent newIntent) {}
+	public void setIntent(Intent newIntent) {
+		this.intent = newIntent;
+	}
 
 	public void unregisterReceiver(BroadcastReceiver receiver) {}
 

src/api-impl/android/app/Application.java

@@ -4,6 +4,7 @@ import android.os.Bundle;
 import android.content.res.Configuration;
 import android.content.Context;
 import android.content.ContextWrapper;
+import android.content.pm.PackageParser;
 
 public class Application extends ContextWrapper {
 	public long native_window;
@@ -16,6 +17,21 @@ public class Application extends ContextWrapper {
 		return getString(pkg.applicationInfo.labelRes);
 	}
 
+	String get_supported_mime_types() {
+		String mimeTypes = "";
+		for (PackageParser.Activity activity: pkg.activities) {
+			for (PackageParser.IntentInfo intent: activity.intents) {
+				for (int i = 0; i < intent.countDataSchemes(); i++) {
+					String scheme = intent.getDataScheme(i);
+					// ignore http and https, as there is no way to only handle specific hosts in a .desktop file
+					if (!"http".equals(scheme) && !"https".equals(scheme))
+						mimeTypes += "x-scheme-handler/" + intent.getDataScheme(i) + ";";
+				}
+			}
+		}
+		return "".equals(mimeTypes) ? null : mimeTypes;
+	}
+
 	public interface ActivityLifecycleCallbacks {
 		void onActivityCreated(Activity activity, Bundle savedInstanceState);
 		void onActivityStarted(Activity activity);

src/api-impl/android/content/IntentFilter.java

@@ -9,6 +9,7 @@ public class IntentFilter {
 	
 	private List<String> actions = new ArrayList<>();
 	private Set<String> categories = new HashSet<>();
+	private List<String> dataSchemes = new ArrayList<>();
 
 	public IntentFilter() {}
 	public IntentFilter(String action) {
@@ -42,4 +43,20 @@ public class IntentFilter {
 	}
 
 	public void setPriority(int priority) {}
+
+	public void addDataScheme(String dataScheme) {
+		dataSchemes.add(dataScheme);
+	}
+
+	public boolean hasDataScheme(String dataScheme) {
+		return dataSchemes.contains(dataScheme);
+	}
+
+	public int countDataSchemes() {
+		return dataSchemes.size();
+	}
+
+	public String getDataScheme(int index) {
+		return dataSchemes.get(index);
+	}
 }

src/api-impl/android/content/pm/PackageParser.java

@@ -28,6 +28,7 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.PatternMatcher;
 import android.os.UserHandle;
+import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.Base64;
 import android.util.DisplayMetrics;
@@ -2247,6 +2248,10 @@ public class PackageParser {
 				XmlUtils.skipCurrentTag(parser);
 				outInfo.addCategory(value);
 			} else if (nodeName.equals("data")) {
+				String scheme = parser.getAttributeValue(
+						ANDROID_RESOURCES, "scheme");
+				if (!TextUtils.isEmpty(scheme))
+					outInfo.addDataScheme(scheme);
 				XmlUtils.skipCurrentTag(parser);
 			} else if (!RIGID_PARSER) {
 				Slog.w(TAG, "Unknown element under <intent-filter>: "