Fragment 组件使用

1.静态使用

mainActivity.xml

public class Fragment1 extends Fragment {    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {        return inflater.inflate(R.layout.fragment01, container, false);    }}

2.动态使用

public class Fragment1 extends Fragment {    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {        return inflater.inflate(R.layout.fragment01, container, false);    }}

public class Fragment2 extends Fragment {    @Nullable    @Override    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        return inflater.inflate(R.layout.fragment02,container,false);    }}

public class MainActivity extends AppCompatActivity  implements View.OnClickListener{    private Button manBtn;    private Button woManBtn;    private Fragment1 fragmentMan;    private Fragment2 fragmentWoman;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        bangID();    }    private void bangID(){        manBtn = findViewById(R.id.man_tv);        woManBtn = findViewById(R.id.woman_tv);        manBtn.setOnClickListener(this);        woManBtn.setOnClickListener(this);    }    @Override    public void onClick(View v) {        FragmentManager manager = getSupportFragmentManager();          FragmentTransaction fragmentTransaction = manager.beginTransaction();  // fragment 事务        switch (v.getId()){            case R.id.man_tv:                if (fragmentMan == null){                    fragmentMan = new Fragment1();                }                fragmentTransaction.replace(R.id.shop_content,fragmentMan);                break;            case R.id.woman_tv:               if (fragmentWoman == null){                   fragmentWoman = new Fragment2();               }               fragmentTransaction.replace(R.id.shop_content,fragmentWoman);               break;        }        fragmentTransaction.commit();  //必须提交，不然不会显示    }}

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