IntentModule.java

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

package com.facebook.react.modules.intent;

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

import com.facebook.react.bridge.JSApplicationIllegalArgumentException;
import com.facebook.react.bridge.Promise;
import com.facebook.react.bridge.ReactApplicationContext;
import com.facebook.react.bridge.ReactContextBaseJavaModule;
import com.facebook.react.bridge.ReactMethod;

/**
 * Intent module. Launch other activities or open URLs.
 */
public class IntentModule extends ReactContextBaseJavaModule {

  public IntentModule(ReactApplicationContext reactContext) {
    super(reactContext);
  }

  @Override
  public String getName() {
    return "IntentAndroid";
  }

  /**
   * Return the URL the activity was started with
   *
   * @param promise a promise which is resolved with the initial URL
   */
  @ReactMethod
  public void getInitialURL(Promise promise) {
    try {
      Activity currentActivity = getCurrentActivity();
      String initialURL = null;

      if (currentActivity != null) {
        Intent intent = currentActivity.getIntent();
        String action = intent.getAction();
        Uri uri = intent.getData();

        if (Intent.ACTION_VIEW.equals(action) && uri != null) {
          initialURL = uri.toString();
        }
      }

      promise.resolve(initialURL);
    } catch (Exception e) {
      promise.reject(new JSApplicationIllegalArgumentException(
          "Could not get the initial URL : " + e.getMessage()));
    }
  }

  /**
   * Starts a corresponding external activity for the given URL.
   *
   * For example, if the URL is "https://www.facebook.com", the system browser will be opened,
   * or the "choose application" dialog will be shown.
   *
   * @param url the URL to open
   */
  @ReactMethod
  public void openURL(String url, Promise promise) {
    if (url == null || url.isEmpty()) {
      promise.reject(new JSApplicationIllegalArgumentException("Invalid URL: " + url));
      return;
    }

    try {
      Activity currentActivity = getCurrentActivity();
      Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));

      String selfPackageName = getReactApplicationContext().getPackageName();
      ComponentName componentName = intent.resolveActivity(
        getReactApplicationContext().getPackageManager());
      String otherPackageName = (componentName != null ? componentName.getPackageName() : "");

      // If there is no currentActivity or we are launching to a different package we need to set
      // the FLAG_ACTIVITY_NEW_TASK flag
      if (currentActivity == null || !selfPackageName.equals(otherPackageName)) {
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      }

      if (currentActivity != null) {
        currentActivity.startActivity(intent);
      } else {
        getReactApplicationContext().startActivity(intent);
      }

      promise.resolve(true);
    } catch (Exception e) {
      promise.reject(new JSApplicationIllegalArgumentException(
          "Could not open URL '" + url + "': " + e.getMessage()));
    }
  }

  /**
   * Determine whether or not an installed app can handle a given URL.
   *
   * @param url the URL to open
   * @param promise a promise that is always resolved with a boolean argument
   */
  @ReactMethod
  public void canOpenURL(String url, Promise promise) {
    if (url == null || url.isEmpty()) {
      promise.reject(new JSApplicationIllegalArgumentException("Invalid URL: " + url));
      return;
    }

    try {
      Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
      // We need Intent.FLAG_ACTIVITY_NEW_TASK since getReactApplicationContext() returns
      // the ApplicationContext instead of the Activity context.
      intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      boolean canOpen =
          intent.resolveActivity(getReactApplicationContext().getPackageManager()) != null;
      promise.resolve(canOpen);
    } catch (Exception e) {
      promise.reject(new JSApplicationIllegalArgumentException(
          "Could not check if URL '" + url + "' can be opened: " + e.getMessage()));
    }
  }
}