gecko-dev/mobile/android/base/GeckoActivity.java.in

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#filter substitution
package org.mozilla.gecko;

import android.app.Activity;
import android.app.Application;
import android.os.Bundle;
import android.content.Intent;
import android.content.ComponentName;

public class GeckoActivity extends Activity {
    private boolean hasStarted = false;
    private boolean isGeckoActivityOpened = false;

    @Override
    public void onPause() {
        super.onPause();

        // Avoid pause notifications in destroy path.
        if (!isFinishing() && (getApplication() instanceof GeckoApplication))
            ((GeckoApplication) getApplication()).onActivityPause(this);
    }

    @Override
    public void onResume() {
        super.onResume();

        // Avoid resume notifications in startup path.
        if (hasStarted && (getApplication() instanceof GeckoApplication)) {
            ((GeckoApplication) getApplication()).onActivityResume(this);
            isGeckoActivityOpened = false;
        } else {
            hasStarted = true;
        }
    }

    @Override
    public void startActivity(Intent intent) {
        checkIfGeckoActivity(intent);
        super.startActivity(intent);
    }

    @Override
    public void startActivityForResult(Intent intent, int request) {
        checkIfGeckoActivity(intent);
        super.startActivityForResult(intent, request);
    }

    private void checkIfGeckoActivity(Intent intent) {
        // Whenever we call our own activity, the component and it's package name is set.
        // If we call an activity from another package, or an open intent (leaving android to resolve)
        // component has a different package name or it is null.
        ComponentName component = intent.getComponent();
        isGeckoActivityOpened = false;
        if (component != null &&
            component.getPackageName() != null &&
            component.getPackageName().equals("@ANDROID_PACKAGE_NAME@")) {
            isGeckoActivityOpened = true;
        }
    }

    public boolean isApplicationInBackground() {
        return !isGeckoActivityOpened;
    } 
}