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最新推荐文章于 2024-03-13 16:24:00 发布

sky_castle

最新推荐文章于 2024-03-13 16:24:00 发布

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分类专栏：控件动画

本文链接：https://blog.youkuaiyun.com/sky_castle/article/details/88029692

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动画

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本文介绍了一个使用Android的RelativeLayout和Button组件实现视图动画的示例。通过改变按钮的大小和位置，展示了如何使用ScaleAnimation和TranslateAnimation创建动态效果。文章详细解释了动画设置、参数调整及布局参数更新的过程。

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  <RelativeLayout
        android:id="@+id/rl_content"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:background="@color/colorAccent">

        <Button
            android:id="@+id/bt_click"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="哈哈哈" />
    </RelativeLayout>

    <Button
        android:id="@+id/bt1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:text="还原" />

    <Button
        android:id="@+id/bt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:text="放大" />

public class MainActivity2 extends AppCompatActivity {
    RelativeLayout rlContent;
    float initWidth;
    float expectWidth;
    int tran;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        Button bt = findViewById(R.id.bt);
        Button bt1 = findViewById(R.id.bt1);
        Button btClick = findViewById(R.id.bt_click);
        btClick.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity2.this, "哈哈哈", Toast.LENGTH_SHORT).show();
            }
        });

        rlContent = findViewById(R.id.rl_content);
        rlContent.post(new Runnable() {
            @Override
            public void run() {
                initWidth = rlContent.getWidth();
            }
        });
        expectWidth = DisplayUtil.dip2px(MainActivity2.this, 200);
        tran = DisplayUtil.dip2px(MainActivity2.this, 150);
        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final float scale = expectWidth / initWidth;
                setAni(scale, tran, tran);
            }
        });
        bt1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final float scale = initWidth / expectWidth;
                setAni(scale, 0, -tran);
            }
        });
    }

    public void setAni(float scale, int Magin, int Tran) {
        AnimationSet animationSet = new AnimationSet(true);
        animationSet.addAnimation(getScale(scale, Magin));
        animationSet.addAnimation(getTran(Tran));
        animationSet.setFillAfter(true);
        rlContent.startAnimation(animationSet);
    }

    public ScaleAnimation getScale(final float scale, final int Margin) {
        ScaleAnimation scaleAnimation = new ScaleAnimation(1.0f, scale, 1.0f, scale);
        scaleAnimation.setDuration(500);
        scaleAnimation.setFillAfter(true);
        scaleAnimation.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                rlContent.clearAnimation();
                RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) rlContent.getLayoutParams();
                layoutParams.setMargins(Margin, Margin, 0, 0);
                layoutParams.width = (int) (layoutParams.width * scale);
                layoutParams.height = (int) (layoutParams.height * scale);
                rlContent.setLayoutParams(layoutParams);


            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });
        return scaleAnimation;
    }

    public TranslateAnimation getTran(float tran) {
        TranslateAnimation translateAnimation = new TranslateAnimation(0, tran, 0, tran);
        translateAnimation.setDuration(500);
        translateAnimation.setFillAfter(true);
        return translateAnimation;
    }
}