PreferenceActivity.java

package com.afollestad.materialdialogssample;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.preference.PreferenceFragment;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;

@SuppressLint("NewApi")
public class PreferenceActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.preference_activity_custom);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    if (getFragmentManager().findFragmentById(R.id.content_frame) == null) {
      getFragmentManager()
          .beginTransaction()
          .replace(R.id.content_frame, new SettingsFragment())
          .commit();
    }
  }

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

  public static class SettingsFragment extends PreferenceFragment {

    @Override
    public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      addPreferencesFromResource(R.xml.preferences);
    }
  }
}