HeadUpDisplay.java 文件源码

public void restorePreferences(final Parameters param) {
    // Do synchronization in "reloadPreferences()"

    OnSharedPreferenceChangeListener l =
            mSharedPreferenceChangeListener;
    // Unregister the listener since "upgrade preference" will
    // change bunch of preferences. We can handle them with one
    // onSharedPreferencesChanged();
    mSharedPrefs.unregisterOnSharedPreferenceChangeListener(l);
    Context context = getGLRootView().getContext();
    Editor editor = mSharedPrefs.edit();
    editor.clear();
    editor.apply();
    CameraSettings.upgradeAllPreferences(mSharedPrefs);
    CameraSettings.initialCameraPictureSize(context, param);
    reloadPreferences();
    if (mListener != null) {
        mListener.onSharedPreferencesChanged();
    }
    mSharedPrefs.registerOnSharedPreferenceChangeListener(l);
}