<android.support.v7.widget.Toolbar
                android:id="@+id/mytoolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="?attr/colorPrimary"
                android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
            </android.support.v7.widget.Toolbar>


package com.example.administrator.test;

import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.widget.AbsListView;
import android.widget.TextView;
import android.support.v7.widget.Toolbar;

import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Observable;

public class IndexActivity extends AppCompatActivity{

    private DrawerLayout mDrawerLayout;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_index);

        Toolbar toolbar=(Toolbar) findViewById(R.id.toolbar) ;
        setSupportActionBar(toolbar);

        mDrawerLayout=(DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBar actionBar=getSupportActionBar();
        if (actionBar!=null){
            actionBar.setDisplayHomeAsUpEnabled(true);
            actionBar.setHomeAsUpIndicator(R.mipmap.mymy);
        }
    }

    public boolean onOptionsItemSelected(MenuItem item){
        switch (item.getItemId()){
            case android.R.id.home:
                mDrawerLayout.openDrawer(GravityCompat.START);
                break;
        }
        return true;
    }

}