主页面帧布局的用法

最新推荐文章于 2022-11-13 15:52:56 发布

原创最新推荐文章于 2022-11-13 15:52:56 发布 · 1.2k 阅读

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本文介绍了一个使用Android中Fragment进行内容切换的示例。通过RadioGroup控件来选择不同的Fragment显示在FrameLayout中，实现简单的Tab功能。示例中包含了初始化多个Fragment的方法以及如何根据RadioGroup的选择更改当前显示的Fragment。

public class MainActivity extends AppCompatActivity {

    private FrameLayout fl_main;
    private RadioGroup group;
    private ArrayList<Fragment> fragments;
    private FragmentManager supportFragmentManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        fl_main = (FrameLayout) findViewById(R.id.fl_main);
        group = (RadioGroup) findViewById(R.id.group);
        initFragments();
        supportFragmentManager = getSupportFragmentManager();
        supportFragmentManager.beginTransaction().add(R.id.fl_main, fragments.get(0)).commit();

        //点击按钮处理切换逻辑
        group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int id) {
                //i 就是你点击的那个控件的id
                //supportFragmentManager可以复用，Transaction不可复用，每次提交后事物就结束了；
                switch (id) {
                    case R.id.but1:
                        supportFragmentManager.beginTransaction().replace(R.id.fl_main, fragments.get(0)).commit();
                        break;
                    case R.id.but2:
                        supportFragmentManager.beginTransaction().replace(R.id.fl_main, fragments.get(1)).commit();

                        break;
                    case R.id.but3:
                        supportFragmentManager.beginTransaction().replace(R.id.fl_main, fragments.get(2)).commit();

                        break;
                    case R.id.but4:
                        supportFragmentManager.beginTransaction().replace(R.id.fl_main, fragments.get(3)).commit();

                        break;
                    case R.id.but5:
                        supportFragmentManager.beginTransaction().replace(R.id.fl_main, fragments.get(4)).commit();

                        break;
                }
            }
        });

    }

    private void initFragments() {
        fragments = new ArrayList<>();
        fragments.add(new Main1Fragment());
        fragments.add(new Main2Fragment());
        fragments.add(new Main3Fragment());
        fragments.add(new Main4Fragment());
        fragments.add(new Main5Fragment());
    }