android TextView onRestoreInstanceState获取错误的值

Question

My code is like this:

    @Override
    public Parcelable onSaveInstanceState() {
        Parcelable superState = super.onSaveInstanceState();
        SavedState savedState = new SavedState(superState);
        savedState.progress = mProgress;
        return savedState;
    }

    @Override
    public void onRestoreInstanceState(Parcelable state) {
            SavedState savedState = (SavedState) state;
            mProgress = savedState.progress;
            super.onRestoreInstanceState(savedState.getSuperState());
    }

The mProgress value is 60 when I pass it to savedState in onSaveInstanceState and I get 0 in onRestoreInstanceState .

if I modify the code savedState.mProgress = mProgress in onSavedInstanceState to savedState.mProgress = 10 then I got 10 in onRestoreInstanceState .

It's so weird. if I make the mProgress static then I get 60. I don't know what's the matter.

Answer 1

Use like this,

@Override
protected void onCreate(Bundle savedInstanceState) {
    if (savedInstanceState != null) {
        mProgress = savedInstanceState.getInt("progress");            
    }
}

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putInt("progress", mProgress);
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);
    if (savedInstanceState != null) {
        mProgress = savedInstanceState.getInt("progress");            
    }
}