抽屉

package com.example.drawerlayout;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.Toast;
import androidx.appcompat.widget.Toolbar;

import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu;

public class Main2Activity extends AppCompatActivity {

private SlidingMenu slidingMenu;
private Toolbar mToolbar;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    supportRequestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_main2);

    mToolbar = findViewById(R.id.toolbar);

    mToolbar.inflateMenu(R.menu.menu);
    mToolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
        @Override
        public boolean onMenuItemClick(MenuItem menuItem) {
            switch (menuItem.getItemId()){
                case R.id.item1:
                    Toast.makeText(Main2Activity.this, menuItem.getTitle(), Toast.LENGTH_SHORT).show();
                    break;
                case R.id.item2:
                    Toast.makeText(Main2Activity.this, menuItem.getTitle(), Toast.LENGTH_SHORT).show();
                    break;
                case R.id.item3:
                    Toast.makeText(Main2Activity.this, menuItem.getTitle(), Toast.LENGTH_SHORT).show();
                    break;
                case R.id.item4:
                    Toast.makeText(Main2Activity.this, menuItem.getTitle(), Toast.LENGTH_SHORT).show();
                    break;
            }
            return true;
        }
    });
    slidingMenu = new SlidingMenu(this);
    slidingMenu.setMenu(LayoutInflater.from(this).inflate(R.layout.slideing,null));
    slidingMenu.setMode(SlidingMenu.LEFT);
    slidingMenu.attachToActivity(this,SlidingMenu.SLIDING_CONTENT);
    slidingMenu.setTouchModeAbove(SlidingMenu.TOUCHMODE_FULLSCREEN);

// slidingMenu.
slidingMenu.getMenu().findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
slidingMenu.showContent();
}
});
}

public void click(View view) {
    slidingMenu.showMenu();
}

}
package com.example.drawerlayout;

import androidx.appcompat.app.AppCompatActivity;
import androidx.drawerlayout.widget.DrawerLayout;

import android.os.Bundle;
import android.view.Gravity;
import android.view.View;

public class Main3Activity extends AppCompatActivity {
private DrawerLayout mDrawerLayout;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main3);

    mDrawerLayout = findViewById(R.id.drawer_layout);

}

public void click(View view) {
    switch (view.getId()){

        case R.id.close:
            mDrawerLayout.closeDrawers();
            break;
        case R.id.open:
            mDrawerLayout.openDrawer(Gravity.LEFT);
            break;
    }
}

}