[英]Android onRestoreInstanceState(Bundle savedInstanceState)
[英]Android onRestoreInstanceState overwriting values
所以我对onSaveInstanceState和onRestoreInstanceState有一个奇怪的问题。 以下是我到目前为止所做的,并且运行良好。 通常调用的方法,保存和恢复值就很好。
@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
// Always call the superclass so it can restore the view hierarchy
super.onRestoreInstanceState(savedInstanceState);
// Restore value of members from saved state
mRawImgPath = savedInstanceState.getString(SAVE_STATE_RAW_IMG_PATH);
mProImgPath = savedInstanceState.getString(SAVE_STATE_PRO_IMG_PATH);
}
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
// Always call the superclass so it can save the view hierarchy state
super.onSaveInstanceState(savedInstanceState);
// Save the user's current game state
savedInstanceState.putString(SAVE_STATE_RAW_IMG_PATH, mRawImgPath);
savedInstanceState.putString(SAVE_STATE_PRO_IMG_PATH, mProImgPath);
}
现在,我想用我想保存的第三个值来增强代码。
@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
// Always call the superclass so it can restore the view hierarchy
super.onRestoreInstanceState(savedInstanceState);
// Restore value of members from saved state
mRawImgPath = savedInstanceState.getString(SAVE_STATE_RAW_IMG_PATH);
mProImgPath = savedInstanceState.getString(SAVE_STATE_PRO_IMG_PATH);
mLastState = savedInstanceState.getString(SAVE_STATE_LAST_STATE);
}
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
// Always call the superclass so it can save the view hierarchy state
super.onSaveInstanceState(savedInstanceState);
// Save the user's current game state
savedInstanceState.putString(SAVE_STATE_RAW_IMG_PATH, mRawImgPath);
savedInstanceState.putString(SAVE_STATE_PRO_IMG_PATH, mProImgPath);
savedInstanceState.putString(SAVE_STATE_LAST_STATE, mLastState);
}
这些方法仍然可以完美调用,但不再恢复正确的值。 我没有将正确的值还原到正确的变量中,而是将SAVE_STATE_LAST_STATE
还原到了所有三个变量( mRawImgPath
, mProImgPath
和mLastState
)中。
我可以说的是,在onSaveInstanceState()
保存时它们具有正确的值,因此在保存时它们不仅具有错误的值。 另外,我不会在onCreate()
处更改值,否则第一个解决方案(只有两个变量)将无法正常工作。 我真的不知道那里发生了什么。
如果有兴趣的话,这里是声明:
// Vars
GPSTracker gps;
String mRawImgPath = ""; // Path of the raw image
String mProImgPath = ""; // Path of the processed image
String mLastState = "";
// Save state variables
static final String SAVE_STATE_RAW_IMG_PATH = "";
static final String SAVE_STATE_PRO_IMG_PATH = "";
static final String SAVE_STATE_LAST_STATE = "";
任何帮助表示赞赏。
static final String SAVE_STATE_RAW_IMG_PATH = "";
static final String SAVE_STATE_PRO_IMG_PATH = "";
static final String SAVE_STATE_LAST_STATE = "";
您那里有空名称,请更改为:
static final String SAVE_STATE_RAW_IMG_PATH = "SAVE_STATE_RAW_IMG_PATH";
static final String SAVE_STATE_PRO_IMG_PATH = "SAVE_STATE_PRO_IMG_PATH";
static final String SAVE_STATE_LAST_STATE = "SAVE_STATE_LAST_STATE";
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