滚动视图位置从纵向更改为横向

Question

我正在开发一款应用。问题是横向模式中的纵向滚动视图位置相对于纵向模式的变化。我不知道这个。我是android新手。请帮助我。

Answer 1

在您的活动类中添加此内容。

@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
final ScrollView scrollView = (ScrollView) findViewById(R.id.scrollView);
outState.putFloatArray("ScrollViewContainerScrollPercentage",
        new float[]{
                (float) scrollView.getScrollX()/scrollView.getChildAt(0).getWidth(),
                (float) scrollView.getScrollY()/scrollView.getChildAt(0).getHeight() });
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
final float[] scrollPercentage = savedInstanceState.getFloatArray("ScrollViewContainerScrollPercentage");
final ScrollView scrollView = (ScrollView) findViewById(R.id.scrollView);
scrollView.post(new Runnable() {
    public void run() {
        scrollView.scrollTo(
                Math.round(scrollPercentage[0]*scrollView.getChildAt(0).getWidth()),
                Math.round(scrollPercentage[1]*scrollView.getChildAt(0).getHeight()));
    }
});
}