全局获取Activity对象

package com.example.administrator; import android.app.Activity; import android.app.Application; import android.os.Bundle; /** * Created by Administrator on 2018\9\3 0003. */ public class App extends Application { @Override public void onCreate() { super.onCreate(); initGlobeActivity(); } private void initGlobeActivity() { /** * 获取栈顶activity */ registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() { @Override public void onActivityCreated(Activity activity, Bundle savedInstanceState) { } @Override public void onActivityDestroyed(Activity activity) { } @Override public void onActivityStarted(Activity activity) { } @Override public void onActivityResumed(Activity activity) { MyActivityManager.getInstance().setCurrentActivity(activity); } @Override public void onActivityPaused(Activity activity) { } @Override public void onActivityStopped(Activity activity) { } @Override public void onActivitySaveInstanceState(Activity activity, Bundle outState) { } }); } }