pub/url_launcher/android/src/main/java/io/flutter/plugins/url_launcher/UrlLauncherPlugin.java

// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package io.flutter.plugins.url_launcher;

import android.content.ComponentName;
import android.content.Intent;
import android.net.Uri;

import io.flutter.app.FlutterActivity;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
import io.flutter.plugin.common.MethodChannel.Result;
import io.flutter.plugin.common.MethodCall;

/**
 * UrlLauncherPlugin
 */
public class UrlLauncherPlugin implements MethodCallHandler {
    private FlutterActivity activity;

    public static UrlLauncherPlugin register(FlutterActivity activity) {
        return new UrlLauncherPlugin(activity);
    }

    private UrlLauncherPlugin(FlutterActivity activity) {
        this.activity = activity;
        new MethodChannel(
                activity.getFlutterView(), "plugins.flutter.io/url_launcher").setMethodCallHandler(this);
    }

    @Override
    public void onMethodCall(MethodCall call, Result result) {
        String url = call.arguments();
        if (call.method.equals("canLaunch")) {
            canLaunch(url, result);
        } else if (call.method.equals("launch")) {
            launchURL(url, result);
        } else {
            result.notImplemented();
        }
    }

    private void launchURL(String url, Result result) {
        Intent launchIntent = new Intent(Intent.ACTION_VIEW);
        launchIntent.setData(Uri.parse(url));
        activity.startActivity(launchIntent);
        result.success(null);
    }

    private void canLaunch(String url, Result result) {
        Intent launchIntent = new Intent(Intent.ACTION_VIEW);
        launchIntent.setData(Uri.parse(url));
        ComponentName componentName = launchIntent.resolveActivity(activity.getPackageManager());

        boolean canLaunch = componentName != null &&
                !"{com.android.fallback/com.android.fallback.Fallback}".
                        equals(componentName.toShortString());
        result.success(canLaunch);
    }
}