BaseActivity.java

package com.github.yuweiguocn.demo.greendao.base;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;

/**
 * Created by growth on 7/9/16.
 */
public class BaseActivity extends AppCompatActivity {

    protected Context ct;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ct = this;
    }

    @Override
    public boolean onSupportNavigateUp() {
        onBackPressed();
        return true;
    }
}