Question

我有两个布局，其中一个是面板，另一个是主布局。我想将面板移到右侧，这部分完成了。问题是主要布局不能拉伸以填满屏幕，当面板转移到右侧时，有一个空白区域（右侧面板的大小）。我试图更改主要布局参数（宽度），但我的布局非常复杂，动画也不够流畅。

这是代码 XML代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >

<LinearLayout
    android:id="@+id/panel"
    android:layout_width="400dp"
    android:layout_height="match_parent"
    android:layout_alignParentRight="true"
    android:background="@android:color/holo_green_dark"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="button1" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="button2" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="button3" />
</LinearLayout>

<LinearLayout
    android:id="@+id/main_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_toLeftOf="@+id/panel"
    android:background="@android:color/holo_purple"
    android:orientation="vertical" >

    <Button
        android:id="@+id/start_animation"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Start" />
</LinearLayout>

java代码

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    _mainLayout = (LinearLayout) findViewById(R.id.main_layout);
    _panelLayout = (LinearLayout) findViewById(R.id.panel);
    _startAnimation = (Button) findViewById(R.id.start_animation);

    _startAnimation.setOnClickListener(new OnClickListener()
    {

        @Override
        public void onClick(View v)
        {
            startAnimation();
        }

    });

}

private void startAnimation()
{
    final RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) _mainLayout.getLayoutParams();
    final int screenWidth = 1280;

    int mainLayoutXPositionStart = (int) _panelLayout.getX();
    int mainLayoutXpositionEnd = screenWidth;

    if (_mainLayoutOpen)
    {
        mainLayoutXpositionEnd = 1280 - _panelLayout.getMeasuredWidth();
        mainLayoutXPositionStart = screenWidth;

    }

    ObjectAnimator mainLayoutAnimation = ObjectAnimator.ofInt(_panelLayout, "mainAnim", mainLayoutXPositionStart, mainLayoutXpositionEnd);
    mainLayoutAnimation.addUpdateListener(new AnimatorUpdateListener()
    {

        @Override
        public void onAnimationUpdate(ValueAnimator animation)
        {
            int value = (Integer) animation.getAnimatedValue();
            //              lp.width = value;
            _panelLayout.setX(value);
            _mainLayout.requestLayout();
            _panelLayout.requestLayout();
        }
    });
    mainLayoutAnimation.setDuration(500);
    mainLayoutAnimation.start();

    _mainLayoutOpen = !_mainLayoutOpen;
}

更新：添加屏幕截图

动画之前
before anim

动画之后 after anim

在动画期间查看定位

0 个答案: