RxJava 从入门到实践（七：框架之 RxLifecycle）

1.RxLifecycle的基本概念

RxLifecycle提供了基于activity和fragment生命周期事件的自动完成队列。用于避免不完整回调导致的内存泄漏。

2.RxLifecycle的配置方法

在android studio 里面添加引用

compile 'com.trello:rxlifecycle:1.0 '

compile 'com.trello:rxlifecycle-android:1.0'

compile 'com.trello:rxlifecycle-components:1.0'

3.用法

public class RxBindingActivity extends RxAppCompatActivity implements RadioGroup.OnCheckedChangeListener {


    private RadioGroup mRadioGroup;
    private Toolbar rxBindingToolbar;
    private BehaviorSubject behaviorSubject = BehaviorSubject.create();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_rx_binding);
        initToolbar();

        mRadioGroup = (RadioGroup) findViewById(R.id.mRadioGroup);
        mRadioGroup.setOnCheckedChangeListener(this);
    }

    private void initToolbar() {
        rxBindingToolbar = (Toolbar) findViewById(R.id.rxbinding_toolbar);
        setSupportActionBar(rxBindingToolbar);
        ActionBar actionBar = getSupportActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);

        //Toolbar的item点击
        RxToolbar.itemClicks(rxBindingToolbar).compose(RxLifecycle.bindUntilEvent(behaviorSubject, ActivityEvent.DESTROY)).subscribe((menuItem -> {
            Snackbar.make(rxBindingToolbar, "toolbar " + ((MenuItem) menuItem).getTitle(), Snackbar.LENGTH_SHORT).show();
        }));

        //Toolbar的导航栏点击
        RxToolbar.navigationClicks(rxBindingToolbar).subscribe(new Action1<Void>() {
            @Override
            public void call(Void aVoid) {
                Snackbar.make(rxBindingToolbar, "toolbar navigationClicks", Snackbar.LENGTH_SHORT).show();
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.rxbinding_menu, menu);
        return super.onCreateOptionsMenu(menu);
    }


    @Override
    public void onCheckedChanged(RadioGroup radioGroup, int i) {
        switch (i) {
            case R.id.simple_click_btn:
                setFragment(SimpleClickFragment.getInstance());
                break;
            case R.id.auto_text_btn:
                setFragment(AutoTextFragment.getInstance());
                break;
            case R.id.checkbox_btn:
                setFragment(CheckboxFragment.getInstance());
                break;
        }
    }

    private void setFragment(Fragment instance) {
        FragmentManager fragmentManager = this.getSupportFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.mlayout, instance)
                .commit();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        behaviorSubject.onNext(ActivityEvent.DESTROY);
    }
}