如何通过位移动画移动一个控件，最后能不闪烁

Question

布局文件代码如下：

 <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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
    <Button
        android:id="@+id/btm_Test"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:text="测试"/>
</RelativeLayout>

Java代码如下

 public class MainActivity extends Activity {

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

        Button btn_Test = (Button)findViewById(R.id.btm_Test);

        btn_Test.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                TranslateAnimation animation = new TranslateAnimation(0, 0, 0, 200);
                animation.setInterpolator(new AccelerateInterpolator());
                animation.setDuration(1000);
                final Button ll = (Button)v;

                animation.setAnimationListener(new Animation.AnimationListener() {
                    public void onAnimationStart(Animation animation) {}

                    public void onAnimationEnd(Animation animation) {

                        RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) ll.getLayoutParams();
                        params.topMargin = 200;
                        ll.setLayoutParams(params);
                    }
                    public void onAnimationRepeat(Animation animation) {}
                });
                ll.startAnimation(animation);
            }
        });
    }
}

Answer 1

animation.setDuration(1000);后面加一个animation.setFillAfter(true);试试？？闪烁的原因应该是你的动画结束了，然后回到了原来的位置，然后你又改变了控件的位置，这样一来一回的闪烁吧，setFillAfter(true)表示动画结束之后留在最后的位置，你试试看，我猜的，嘿嘿