Android - Tabhost在Activity类中工作

public class MainActivity extends AppCompatActivity {

    private TabHost tabHost;

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

        tabHost = findViewById(R.id.tabhost);
        tabHost.setup();

        TabHost.TabSpec tabSpec1 = tabHost.newTabSpec("Tab 1");
        tabSpec1.setIndicator("Tab 1");
        tabSpec1.setContent(new Intent(this, Tab1Activity.class));

        TabHost.TabSpec tabSpec2 = tabHost.newTabSpec("Tab 2");
        tabSpec2.setIndicator("Tab 2");
        tabSpec2.setContent(new Intent(this, Tab2Activity.class));

        tabHost.addTab(tabSpec1);
        tabHost.addTab(tabSpec2);
    }
}