标签:LifecycleOwner 核心 void 接口 Lifecycle Lifcycle owner public
- 本质是观察者模式,LifecycleOwner作为被观察者,LifecycleObserver作为观察者
1、LifecycleObserver 观察者
- 观察者实现此接口
- 顶层接口,没有任何方法和属性
package androidx.lifecycle;
@SuppressWarnings("WeakerAccess")
public interface LifecycleObserver {
}
FullLifecycleObserver
- FullLifecycleObserver定义了全生命周期方法
interface FullLifecycleObserver extends LifecycleObserver {
void onCreate(LifecycleOwner owner);
void onStart(LifecycleOwner owner);
void onResume(LifecycleOwner owner);
void onPause(LifecycleOwner owner);
void onStop(LifecycleOwner owner);
void onDestroy(LifecycleOwner owner);
}
2、LifecycleOwner 被观察者
- LifecycleOwner接口只有一个方法,getLifecycle()
public interface LifecycleOwner {
/**
* Returns the Lifecycle of the provider.
*
* @return The lifecycle of the provider.
*/
@NonNull
Lifecycle getLifecycle();
}
Activity
- AppCompatActivity继承自FragmentActivity,FragmentActivity继承自ComponentActivity
- ComponentActivity实现了LifecycleOwner接口
public class ComponentActivity extends Activity
implements LifecycleOwner, KeyEventDispatcher.Component {
private final LifecycleRegistry mLifecycleRegistry = new LifecycleRegistry(this);
@Override
public Lifecycle getLifecycle() {
return mLifecycleRegistry;
}
}
Fragment
- Lifecycle在Fragment中的使用方法与Activity中的使用方法相同,因为Fragment也实现了LifecycleOwner接口
public class Fragment implements ComponentCallbacks, OnCreateContextMenuListener, LifecycleOwner, ViewModelStoreOwner {
@Override
public Lifecycle getLifecycle() {
return mLifecycleRegistry;
}
}
service
- 创建Service时,继承LifecycleService,这个类也实现了LifecycleOwner接口
package androidx.lifecycle;
public class LifecycleService extends Service implements LifecycleOwner {
}
标签:LifecycleOwner,核心,void,接口,Lifecycle,Lifcycle,owner,public 来源: https://www.cnblogs.com/ArthurWangWang/p/14970166.html
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。