获取activity中当前片段的名称。Android Studio

import android.support.v4.app.FragmentManager;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

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

        // 获取FragmentManager对象
        FragmentManager fragmentManager = getSupportFragmentManager();

        // 通过片段的ID或标签获取当前片段的实例
        Fragment currentFragment = fragmentManager.findFragmentById(R.id.fragment_container);
        // 或者
        // Fragment currentFragment = fragmentManager.findFragmentByTag("fragment_tag");

        // 获取当前片段的名称
        String fragmentName = currentFragment.getTag();

        // 打印当前片段的名称
        System.out.println("当前片段的名称：" + fragmentName);
    }
}