android TextView onRestoreInstanceState獲取錯誤的值

Question

我的代碼是這樣的：

    @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());
    }

該mProgress值是60，當我把它傳遞給savedState中onSaveInstanceState和我得到0 onRestoreInstanceState 。

如果我修改代碼savedState.mProgress = mProgress在onSavedInstanceState到savedState.mProgress = 10然后我在得到了10 onRestoreInstanceState 。

好奇怪 如果我將mProgress靜態，則得到60。我不知道怎么回事。

Answer 1

這樣使用

@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");            
    }
}