SubActivity.java

package com.asha.chromelikeswipelayout;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;

/**
 * Created by hzqiujiadi on 15/12/1.
 * hzqiujiadi ashqalcn@gmail.com
 */
public class SubActivity extends AppCompatActivity {
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActionBar actionBar = getSupportActionBar();
        if ( actionBar != null ) actionBar.setDisplayHomeAsUpEnabled(true);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()){
            case android.R.id.home:
                this.finish(); return true;
        }
        return super.onOptionsItemSelected(item);
    }
}