BaseActivity.java

/*
 * Copyright (C) 2014 Andrew Reitz
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.andrewreitz.encryptedcamera.ui.activity;

import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;

import com.andrewreitz.encryptedcamera.EncryptedCameraApp;
import com.andrewreitz.encryptedcamera.di.module.ActivityModule;

import java.util.Arrays;
import java.util.List;

import butterknife.ButterKnife;
import dagger.ObjectGraph;

public abstract class BaseActivity extends Activity {

    private ObjectGraph mActivityGraph;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Inject objects into the object graph at the activity level, this is for
        // objects that need values that aren't available until the activity is created.
        EncryptedCameraApp application = EncryptedCameraApp.get(this);
        mActivityGraph = application
                .getApplicationGraph()
                .plus(
                        getModules().toArray()
                );

        mActivityGraph.inject(this);
    }

    @Override
    protected void onDestroy() {
        // Eagerly clear the reference to the activity graph to allow
        // it to be garbage collected as soon as possible.
        mActivityGraph = null;
        super.onDestroy();
    }

    protected List<Object> getModules() {
        return Arrays.<Object>asList(
                new ActivityModule(this)
        );
    }


    /** Inject the supplied {@code object} using the activity-specific graph. */
    public void inject(Object object) {
        mActivityGraph.inject(object);
    }

    public static BaseActivity get(Fragment fragment) {
        return (BaseActivity) fragment.getActivity();
    }
}