并调用覆盖的方法onsaveinstancestate（bundle outstate）。当用户重新输入活动时，oncreate（bundle savedi...
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initHandler(); initService(); initThread(); } public void initThread() { new Thread(new Runnable() { @Override public void run() { // TODO Auto-generated method...
当activity被切换到后台或者启动新的activity后,原有activity就会被销毁,再次回来时,就会执行onRestoreInstanceState了。 屏幕旋转、改变系统语言、字体大小变化 附赠一点知识,如果要防止这些系统变化导致activity重建,可以在manifest增加activity是,设置android:configChanges属性,属性可选值参考 关于android:configChanges的属性 ,...
public void onSaveInstanceState(Bundle savedInstanceState){ super.onSaveInstanceState(savedInsanceState); } 在实际应用中,当一个Activity结束前,如果需要保存状态,就在onsaveInstanceState中,将状态数据以key-value的形式放入到savedInstanceState中。这样,当一个Activity被创建时,就能从onCreate的参数savedInsanceState...
onRestoreInstanceState()在onStart() 和 onPostCreate(Bundle)之间调用。 4. onSaveInstanceState()方法的默认实 如果我们没有覆写onSaveInstanceState()方法, 此方法的默认实现会自动保存activity中的某些状态数据, 比如activity中各种UI控件的状态.。android应用框架中定义的几乎所有UI控件都恰当的实现了onSaveInstanceSta...
Icepick is an Android library that eliminates the boilerplate of saving and restoring instance state. It uses annotation processing to generate code that does bundle manipulation and key generation, so that you don't have to write it yourself. ...
onCreate(Bundle savedInstanceState) Function in Android: When an Activity first call or launched then onCreate(Bundle savedInstanceState) method is responsible to create the activity. When ever orientation(i.e. from horizontal to vertical or vertical to horizontal) of activity gets changed or when...
Android系統的回收機制會在未經使用者主動操作的情況下銷燬activity,而為了避免系統回收activity導致資料丟失,Android為我們提供了onSaveInstanceState(Bundle outState)和onRestoreInstanceState(Bundle savedInstanceState)用於儲存和恢復資料。 一、onSaveInstanceState(Bundle outState)在什麼時機會被呼叫呢?
1、onSaveInstanceState方法是Activity的生命周期方法,主要用于在Activity销毁时保存一些信息。 2、当Activity只执行onPause方法时(Activity a打开一个透明Activity b)这时候如果App设置的targetVersion大于android3.0则不会执行onSaveInstanceState方法。 3、当Activity执行onStop方法时,通过分析源码我们知道调用onSaveInstanceStat...
Called by #restoreHierarchyState(android.util.SparseArray) to retrieve the state for this view and its children.