Navigation(1)_navigation=1-优快云博客

本文链接：https://blog.youkuaiyun.com/ArtinCode/article/details/106601364

简单的切换

容器
碎片
导航控制
导航图形化

创建nav
创建碎片
创建xml
太赞了图形化

设置监听方法一

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        Button button;
        button = getView().findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                NavController controller = Navigation.findNavController(v);
                controller.navigate(R.id.action_homeFragment2_to_detailFragment2);
            }
        });

    }

设置监听方法二

@Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        getView().findViewById(R.id.button2).
                setOnClickListener(Navigation.createNavigateOnClickListener(R.id.action_detailFragment2_to_homeFragment2));
    }

设置返回按钮

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        NavController controller = Navigation.findNavController(this,R.id.fragment);
        NavigationUI.setupActionBarWithNavController(this,controller);
    }

    @Override
    public boolean onSupportNavigateUp() {
        NavController controller = Navigation.findNavController(this,R.id.fragment);
        return controller.navigateUp();
        //return super.onSupportNavigateUp();
    }
}