ProgressLayoutActivity.java

package com.marshalchen.common.demoofui.androidprogresslayout;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.MenuItem;

import com.marshalchen.common.demoofui.R;


public class ProgressLayoutActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.android_progress_layout_activity_main);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .replace(R.id.root_container, ListFragment.newInstance())
                    .commit();
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            onBackPressed();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onBackPressed() {
        if (getSupportFragmentManager().getBackStackEntryCount() > 0) {
            getSupportFragmentManager().popBackStack();
            return;
        }

        super.onBackPressed();
    }
}