翻译动画安卓

Question

我有一个 RecyclerView，里面有图片。我需要将点击的图像移动到屏幕的中心。并且不应该依赖图像的起点，它应该移动到屏幕的中心。

我尝试使用 XML 代码来执行此操作 - 它不能正常工作，TranslateAnimation 对象 - 它不能正常工作。在这两种变体中，图像的移动取决于图像的起始位置，并且所有图像的最终点都不同。

我不知道该怎么做。请帮帮我）

Answer 1

试试下面的代码。代码使用了Listview，但同样的逻辑可以应用到RecyclerView。

这里的方法是在列表视图的父布局中创建一个新的图像视图，与单击的图像重叠。然后将新创建的 imageview 平移到屏幕中心。

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

    root = (RelativeLayout) findViewById(R.id.main_root);
    listView = (ListView) findViewById(R.id.list);

    MyAdapter adapter = new MyAdapter(MainActivity.this, web, imageId);

    listView.setAdapter(adapter);
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                                int position, long id) {

            ImageView imgView = (ImageView) view.findViewById(R.id.grid_image);

            // Get location of window with respect to window.
            int location[] = new int[2];
            imgView.getLocationInWindow(location);

            // Create a new image view overlapping
            // the image view that was clicked.
            ImageView imgView2 = new ImageView(MainActivity.this);
            imgView2.setImageDrawable(imgView.getDrawable());

            // To make it overlap, use the location values of
            // the clicked image as left and top margin for the
            // new image.
            RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
                    imgView.getWidth(), imgView.getHeight());
            params.leftMargin = location[0];
            params.topMargin  = location[1] - getStatusBarHeight();

            // Add the new image view to the root view of the activity.
            root.addView(imgView2, params);

            translateToCenter(imgView2, location);
        }
    });

}

/**
 * To translate the new image view to the center of the screen.
 * @param view
 * @param originalLoc
 */
private void translateToCenter(View view , int originalLoc[])
{
    int xMove = root.getWidth() / 2 - view.getWidth() / 2  - originalLoc[0];
    int yMove = root.getHeight() / 2 - view.getHeight() / 2 - originalLoc[1];

    TranslateAnimation anim = new TranslateAnimation( 0, xMove , 0, yMove );
    anim.setDuration(1000);
    anim.setFillAfter( true );
    view.startAnimation(anim);
}

/**
 * To get the status bar height.
 * @return
 */
private int getStatusBarHeight() {
    int result = 0;
    int resourceId = getResources().getIdentifier(
            "status_bar_height", "dimen", "android");
    if (resourceId > 0) {
        result = getResources().getDimensionPixelSize(resourceId);
    }
    return result;
}