Android 中Fragment实现(芝麻虽小,必不可少.)

Fragment在android中常用也非常用的就不做过多的介绍了

MainActivity界面

public class MainActivity extends FragmentActivity {    private FragmentManager manager;    private Frag01 frag01;    private Frag02 frag02;    private Frag03 frag03;    private FrameLayout frag;    private RadioGroup radio;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        radio = findViewById(R.id.radio);        frag = findViewById(R.id.frag);        //新建事务        manager = getSupportFragmentManager();        FragmentTransaction transaction = manager.beginTransaction();        frag01 = new Frag01();        frag02 = new Frag02();        frag03 = new Frag03();        //添加事务        transaction.add(R.id.frag,frag01);        transaction.add(R.id.frag,frag02);        transaction.add(R.id.frag,frag03);        transaction.show(frag01).hide(frag02).hide(frag03);        transaction.commit();        //实现点击切换        radio.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {            private FragmentTransaction transaction1;            @Override            public void onCheckedChanged(RadioGroup group, int checkedId) {                //开启新事务                transaction1 = manager.beginTransaction();                switch (checkedId){                    case R.id.but1:                        transaction1.show(frag01).hide(frag02).hide(frag03);                        break;                    case R.id.but2:                        transaction1.show(frag02).hide(frag01).hide(frag03);                        break;                    case R.id.but3:                        transaction1.show(frag03).hide(frag02).hide(frag01);                        break;                }                transaction1.commit();            }        });    }}

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