android 横竖屏切换与数据保存

一，横竖屏切换时不重新载入数据，只需在menifest中加入：

android:configChanges="keyboardHidden|orientation"

二，横竖屏切换时重新载入数据，程序会程序进入onCreate，因此需要对数据进行存储以备后用。

***方法一：

@Override

public Object onRetainNonConfigurationInstance() {

// save data :browserHistoryAdapter

Intent i = new Intent();

Bundle b = new Bundle();

b.putSerializable(KEY_HISTORY_SAVED, (Serializable) browserHistoryAdapter);

i.putExtras(b);

return i;

}

// get saved data after configure changed :browserHistoryAdapter

Intent historySaved;

if((historySaved = (Intent) getLastNonConfigurationInstance()) == null){

historySaved = getIntent();

}

if(historySaved != null && historySaved.getExtras() != null){

browserHistoryAdapter = (BrowserHistoryAdapter) historySaved.getExtras().get(KEY_HISTORY_SAVED);

}

***方法二：

@Override

protected void onSaveInstanceState(Bundle outState) {

super.onSaveInstanceState(outState);

// save data :url

outState.putString(STR_URL, url);

}

// get saved data after configure changed :url

if (savedInstanceState != null) {

url = savedInstanceState.getString(STR_URL);

}