Android---fragment动态切换简单使用

public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private FragmentManager manager;    private FragmentTransaction transaction;    private RadioButton rb_shoprank, rb_share, rb_gift, rb_order;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        manager = getSupportFragmentManager();        transaction = manager.beginTransaction();        transaction.add(R.id.content_layout, new ShoprankFragment());        transaction.commit();    }    // 初始化视图    public void initView() {        rb_shoprank = (RadioButton) findViewById(R.id.rb_shoprank);        rb_share = (RadioButton) findViewById(R.id.rb_sharerank);        rb_gift = (RadioButton) findViewById(R.id.rb_shopgift);        rb_order = (RadioButton) findViewById(R.id.rb_shoporder);        rb_shoprank.setOnClickListener(this);        rb_share.setOnClickListener(this);        rb_gift.setOnClickListener(this);        rb_order.setOnClickListener(this);    }        // 点击方法    @Override    public void onClick(View v) {        // 点击时启动trancaction事件        transaction = manager.beginTransaction();                switch (v.getId()) {            case R.id.rb_shoprank:                transaction.replace(R.id.content_layout, new ShoprankFragment());                break;            case R.id.rb_sharerank:                transaction.replace(R.id.content_layout, new ShopshareFragment());                break;            case R.id.rb_shopgift:                transaction.replace(R.id.content_layout, new ShopgiftFragment());                break;            case R.id.rb_shoporder:                transaction.replace(R.id.content_layout, new ShoporderFragment());                break;            default:                break;        }        transaction.commit();    }}
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