以编程方式调整布局的大小(作为动画) [英] Resizing layouts programmatically (as animation)

问题描述

我想在活动"中调整一些布局的大小.

I want to resize some layouts in my Activity.

以下是主要XML的代码:

Here is the code of the main XML:

<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_weight="1"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/top"
        android:layout_width="fill_parent"
        android:layout_height="0dip"
        android:layout_weight="1"
        android:background="#3ee3e3" >
    </LinearLayout>

    <LinearLayout
        android:id="@+id/middle"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1">
    </LinearLayout>

    <LinearLayout
        android:id="@+id/bottom"
        android:layout_width="fill_parent"
        android:layout_height="0dip"
        android:layout_weight="1"
        android:background="#fe51e6" >
    </LinearLayout>
</LinearLayout>

如您所见，顶部和底部布局的高度为0，中间为 布局覆盖了所有地方.

As you can see, the top and bottom layouts height's is 0, and the middle layout covers all the place.

我想以编程方式减小中间布局的大小，同时增大顶部 和底部布局的大小，直到所有布局都具有相同的高度.

I want to programmatically decrease the middle layout size, while increase both the top and the bottom layout sizes, till all the layouts have the same height.

我希望它看起来像一个动画.

I want it to be look like an animation.

我应该怎么做?

谢谢

推荐答案

我出于类似的目的编写了ResizeAnimation.简单但昂贵.

I wrote a ResizeAnimation for a similar purpose. It's simple but costly.

/**
 * an animation for resizing the view.
 */
public class ResizeAnimation extends Animation {
    private View mView;
    private float mToHeight;
    private float mFromHeight;

    private float mToWidth;
    private float mFromWidth;

    public ResizeAnimation(View v, float fromWidth, float fromHeight, float toWidth, float toHeight) {
        mToHeight = toHeight;
        mToWidth = toWidth;
        mFromHeight = fromHeight;
        mFromWidth = fromWidth;
        mView = v;
        setDuration(300);
    }

    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t) {
        float height =
                (mToHeight - mFromHeight) * interpolatedTime + mFromHeight;
        float width = (mToWidth - mFromWidth) * interpolatedTime + mFromWidth;
        LayoutParams p = mView.getLayoutParams();
        p.height = (int) height;
        p.width = (int) width;
        mView.requestLayout();
    }
}

这篇关于以编程方式调整布局的大小(作为动画)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！