我正在尝试保存以下数据:
@Override
public void setMessageDetailsExpanded(MessageHeaderItem i, boolean expanded,
int heightBefore) {
mDiff = (expanded ? 1 : -1) * Math.abs(i.getHeight() - heightBefore);
String mHeaderItem = i.toString();
final boolean mDetailsExpanded = expanded;
int mHeightBefore = heightBefore;
}
当在上面设置断点时,我看到了我想要 bundle 的数据:
mMessageHeaderItem = com.android.mail.browse.ConversationViewAdapter$MessageHeaderItem@425a6f40
detailsExpanded = true
heightBefore = 229
但是,当在 onSaveInstanceState 设置断点时 - 我的输出似乎不包含上面的数据?!
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putFloat(BUNDLE_KEY_WEBVIEW_Y_PERCENT, calculateScrollYPercent());
outState.putBoolean(getTag(), mDetailsExpanded);
outState.putInt(getTag(), height);
outState.putString(getTag(), mHeaderItem);
}
Im not sure why but for some reason when debugging the code above it contains the following:
mDetailsExpanded = False
height = 0
mHeaderItem = null
我知道我忽略了一些小东西 - 但我似乎无法弄清楚为什么我没有将 setMessageDetailsExpanded
中的数据保存在 onSavedInstanceState
的包中。
完整来源:
最佳答案
第一个问题:您需要声明要用作类变量的变量
public class MyClass {
private int x;
private String y;
....
然后您就可以在其他功能中正确访问它们。
第二个问题:在包中保存所需的变量后调用 super
outState.putString("myString", y);
super.onSaveInstanceState(outState)
关于java - 无法在 onSaveInstanceState 中 bundle 数据,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27806802/