com.github.jobs.ui.activity.BaseActivity.java Source code

Introduction

Here is the source code for com.github.jobs.ui.activity.BaseActivity.java

Source

/*
 * Copyright 2012 CodeSlap
 *
 * 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.github.jobs.ui.activity;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.FrameLayout;
import com.github.jobs.GithubJobsApplication;
import com.squareup.otto.Bus;
import javax.inject.Inject;

public abstract class BaseActivity extends FragmentActivity {
    private boolean mSetContentViewAlreadyCalled;
    @Inject
    Bus bus;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        super.onCreate(savedInstanceState);
        ((GithubJobsApplication) getApplication()).inject(this);
    }

    @Override
    public void onResume() {
        super.onResume();
        bus.register(this);
    }

    @Override
    public void onPause() {
        super.onPause();
        bus.unregister(this);
    }

    @Override
    public void setContentView(int layoutResId) {
        super.setContentView(layoutResId);
        onSetContentView();
    }

    @Override
    public void setContentView(View view) {
        super.setContentView(view);
        onSetContentView();
    }

    @Override
    public void setContentView(View view, ViewGroup.LayoutParams params) {
        super.setContentView(view, params);
        onSetContentView();
    }

    private void onSetContentView() {
        setProgressBarIndeterminateVisibility(false);
        mSetContentViewAlreadyCalled = true;
    }

    /**
     * Helper method that allows to initialize and add a fragment to activities that usually have
     * just one single fragment. Fragment is added using its class.getName() as tag.
     *
     * @param containerId resource id of the fragment container (must be created through android
     * resources)
     * @param fragmentClass the class of the fragment to setup
     */
    void setupBaseFragment(int containerId, Class<? extends Fragment> fragmentClass) {
        setupBaseFragment(containerId, fragmentClass, null);
    }

    /**
     * Helper method that allows to initialize and add a fragment to activities that usually have
     * just one single fragment. Fragment is added using its class.getName() as tag.
     *
     * @param containerId resource id of the fragment container (must be created through android
     * resources)
     * @param fragmentClass the class of the fragment to setup
     * @param args bundle with the arguments to pass to the fragment
     */
    void setupBaseFragment(int containerId, Class<? extends Fragment> fragmentClass, Bundle args) {
        if (mSetContentViewAlreadyCalled) {
            View view = findViewById(containerId);
            if (!(view instanceof ViewGroup)) {
                throw new IllegalStateException(
                        "Since you already called setContentView, it must has a ViewGroup whose id is 'containerId'");
            }
        } else {
            FrameLayout container = new FrameLayout(this);
            container.setId(containerId);
            setContentView(container);
        }

        // let's check whether fragment is already added
        Fragment fragment = findFragment(fragmentClass);
        if (fragment == null) {
            // if not, let's create it and add it
            fragment = Fragment.instantiate(this, fragmentClass.getName(), args);

            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            ft.add(containerId, fragment, fragmentClass.getSimpleName());
            ft.commit();
        }
    }

    /**
     * Allows to retrieve the instance of a previously added fragment. We
     * use fragmentClass.getName() to find by tag.
     *
     * @param fragmentClass the fragment class
     * @return the fragment or null if it was has not been added
     */
    <T> T findFragment(Class<? extends T> fragmentClass) {
        FragmentManager fm = getSupportFragmentManager();
        Fragment fragment = fm.findFragmentByTag(fragmentClass.getSimpleName());
        if (!fragmentClass.isInstance(fragment)) {
            return null;
        }
        //noinspection unchecked
        return (T) fragment;
    }
}