添加动画时隐藏]的LinearLayout＆QUOT; （View.GONE）和show的LinearLayout（View.VISIBLE） [英] Add animation when hide "LinearLayout" (View.GONE) and show LinearLayout (View.VISIBLE)

问题描述

对不起，我的英语...我会尽量解释什么，我想做的事情。
我有一个项目。它可以在网址下载：

Sorry for my English... I will try to explain what I want to do. I have a project. It can be downloaded at the link:

• 的https://drive.google.com/file/d/0Bxhi0uFKK3upcXJjNGtMVkg4TDQ/view?usp=sharing

正如你所看到的截图：

• http://pixs.ru/showimage/Screenshot_9509352_15647059.png

• http://pixs.ru/showimage/Screenshot_9509352_15647059.png

按钮隐藏/显示乙布局隐藏和显示绿色的集装​​箱 - B布局。我想添加动画自上而下当容器B布局的显示。而从下往上动画当容器被隐藏。另外，我想蓝色的集装箱C，逐渐与容器B一起下跌。和瑞星顺利，​​容器B在一起。请帮我做到这一点。

The button "Hide/Show B layout" hides and shows the green container - "B layout". I want add animation top down when the container "B layout" is showing. And the animation from the bottom up when the container is hidden. Also, I want the blue container "C", gradually fell together with the container "B". And rising smoothly, together with the container "B". Please help me to do it.

下面复制我的code：

Below duplicate my code:

MainActivity

public class MainActivity extends Activity {
View Layout;

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

    Layout = findViewById(R.id.bLayout);

    final  View  button2  =  findViewById (R.id.button); 
    button2.setOnClickListener(new  View.OnClickListener(){

      @Override 
      public void onClick (View v){ 

          if ((Layout.getVisibility() == View.VISIBLE))
          {  

              Layout.setVisibility(View.GONE);
          }
          else
          {

            // Animation animFadeIn = AnimationUtils.loadAnimation(getApplicationContext(), android.R.anim.slide_in_left);
            // Layout.setAnimation(animFadeIn);
             Layout.setVisibility(View.VISIBLE);

          }
      } 
    });

}

}

推荐答案

我找到了一个解决问题的办法。全部课程和源$ C ​​$ C可以在这里下载：点击这里

I found a solution to the problem. Full lesson and source code can be downloaded here: click here

或者使用code如下：

Or use the code below:

activity_main.xml中

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<LinearLayout
    android:id="@+id/header"
    android:layout_width="match_parent"
    android:layout_height="64dp"
    android:layout_marginLeft="16dp"
    android:layout_marginRight="16dp"
    android:layout_marginTop="16dp"
    android:background="#FCF"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/color"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_marginBottom="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:background="@drawable/rectangle"
        android:fontFamily="sans-serif-light"
        android:gravity="center_vertical"
        android:text=""
        android:textAlignment="center"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/clickme"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="4dp"
        android:fontFamily="sans-serif-light"
        android:gravity="center_vertical"
        android:text="click_here"
        android:textStyle="bold" />
</LinearLayout>

<LinearLayout
    android:id="@+id/expandable"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="16dp"
    android:layout_marginRight="16dp"
    android:background="#FFF"
    android:orientation="vertical"
    android:paddingLeft="4dp" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="text1" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="text2" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Слуга: text3" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="text4" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="text5" />
</LinearLayout>

MainActivity.java

public class MainActivity extends Activity {

    LinearLayout mLinearLayout;
    LinearLayout mLinearLayoutHeader;
    ValueAnimator mAnimator;

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

        setTitle("title");

        mLinearLayout = (LinearLayout) findViewById(R.id.expandable);
        // mLinearLayout.setVisibility(View.GONE);
        mLinearLayoutHeader = (LinearLayout) findViewById(R.id.header);

        // Add onPreDrawListener
        mLinearLayout.getViewTreeObserver().addOnPreDrawListener(
                new ViewTreeObserver.OnPreDrawListener() {

                    @Override
                    public boolean onPreDraw() {
                        mLinearLayout.getViewTreeObserver()
                                .removeOnPreDrawListener(this);
                        mLinearLayout.setVisibility(View.GONE);

                        final int widthSpec =     View.MeasureSpec.makeMeasureSpec(
                                0, View.MeasureSpec.UNSPECIFIED);
                        final int heightSpec = View.MeasureSpec
                                .makeMeasureSpec(0,
                                        View.MeasureSpec.UNSPECIFIED);
                        mLinearLayout.measure(widthSpec, heightSpec);

                        mAnimator = slideAnimator(0,
                                mLinearLayout.getMeasuredHeight());
                        return true;
                    }
                });

        mLinearLayoutHeader.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                if (mLinearLayout.getVisibility() == View.GONE) {
                    expand();
                } else {
                    collapse();
                }
            }
        });
    }

    private void expand() {
        // set Visible
        mLinearLayout.setVisibility(View.VISIBLE);

        mAnimator.start();
    }

    private void collapse() {
        int finalHeight = mLinearLayout.getHeight();

        ValueAnimator mAnimator = slideAnimator(finalHeight, 0);

        mAnimator.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationEnd(Animator animator) {
                // Height=0, but it set visibility to GONE
                mLinearLayout.setVisibility(View.GONE);
            }

            @Override
            public void onAnimationStart(Animator animator) {
            }

            @Override
            public void onAnimationCancel(Animator animator) {
            }

            @Override
            public void onAnimationRepeat(Animator animator) {
            }
        });
        mAnimator.start();
    }

    private ValueAnimator slideAnimator(int start, int end) {

        ValueAnimator animator = ValueAnimator.ofInt(start, end);

        animator.addUpdateListener(new     ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator valueAnimator) {
                // Update Height
                int value = (Integer) valueAnimator.getAnimatedValue();

                ViewGroup.LayoutParams layoutParams = mLinearLayout
                        .getLayoutParams();
                layoutParams.height = value;
                mLinearLayout.setLayoutParams(layoutParams);
            }
        });
        return animator;
    }
}

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