Android动画--布局动画 LayoutAnimation

LayoutTransition

相关的属性值

APPEARING：当一个View在ViewGroup中出现时，对此View设置的动画

CHANGE_APPEARING：当一个View在ViewGroup中出现时，对此View对其他View位置造成影响，对其他View设置的动画。

DISAPPEARING： 当一个View在ViewGroup中消失时，对此View设置的动画。

CHANGE_DISAPPEARING： 当一个View在ViewGroup中消失时，对此View对其他View位置造成影响，对其他View设置的动画。

CHANGE： 不是由于View出现或消失造成对其他View位置造成影响，然后对其他View设置的动画。

使用默认的属性值定义的相关布局动画

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Button button1;
    private GridLayout gridLayout;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        initListener();
        LayoutTransition layoutTransition = new LayoutTransition();
        layoutTransition.setAnimator(LayoutTransition.APPEARING, layoutTransition.getAnimator(LayoutTransition.APPEARING));
        layoutTransition.setAnimator(LayoutTransition.CHANGE_APPEARING, layoutTransition.getAnimator(LayoutTransition.CHANGE_APPEARING));
        layoutTransition.setAnimator(LayoutTransition.CHANGE_DISAPPEARING, layoutTransition.getAnimator(LayoutTransition.CHANGE_DISAPPEARING));
        layoutTransition.setAnimator(LayoutTransition.CHANGING, layoutTransition.getAnimator(LayoutTransition.CHANGING));
        layoutTransition.setAnimator(LayoutTransition.DISAPPEARING, layoutTransition.getAnimator(LayoutTransition.DISAPPEARING));
        gridLayout.setLayoutTransition(layoutTransition);
    }

    private void initListener() {
        button1.setOnClickListener(this);
    }

    private void init() {
        button1 = (Button) findViewById(R.id.button1);
        gridLayout = (GridLayout) findViewById(R.id.gridLayout);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.button1:
                TextView textView = new TextView(this);
                textView.setText("你这个小碧池");
                textView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
                gridLayout.addView(textView,0);
                textView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        gridLayout.removeView(v);
                    }
                });
                break;
        }
    }
}

• 我们来看相关的代码

LayoutTransition layoutTransition = new LayoutTransition();
        layoutTransition.setAnimator(LayoutTransition.APPEARING, layoutTransition.getAnimator(LayoutTransition.APPEARING));
        layoutTransition.setAnimator(LayoutTransition.CHANGE_APPEARING, layoutTransition.getAnimator(LayoutTransition.CHANGE_APPEARING));
        layoutTransition.setAnimator(LayoutTransition.CHANGE_DISAPPEARING, layoutTransition.getAnimator(LayoutTransition.CHANGE_DISAPPEARING));
        layoutTransition.setAnimator(LayoutTransition.CHANGING, layoutTransition.getAnimator(LayoutTransition.CHANGING));
        layoutTransition.setAnimator(LayoutTransition.DISAPPEARING, layoutTransition.getAnimator(LayoutTransition.DISAPPEARING));
        gridLayout.setLayoutTransition(layoutTransition);

• 这里定义的是布局动画的各个属性，都是使用的默认值，然后为对应的gridLayout设定布局动画

                TextView textView = new TextView(this);
                textView.setText("你这个小碧池");
                textView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
                gridLayout.addView(textView,0);
                textView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        gridLayout.removeView(v);
                    }
                });

• 这里我们动态的添加TextView控件
• 同时为TextView设置相应的点击事件，当被点击，就从gridLayout中移除出去
  

使用自定义属性值定义的相关布局动画

• 代码如下

public class SecActivity extends AppCompatActivity implements OnClickListener {

    private Button button_sec;
    private CheckBox checkBox1, checkBox2, checkBox3, checkBox4;
    private GridLayout gridLayout;
    private int index;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sec);
        init();
    }

    private void init() {
        button_sec = (Button) findViewById(R.id.button_sec);
        button_sec.setOnClickListener(this);
        checkBox1 = (CheckBox) findViewById(R.id.checkBox);
        checkBox2 = (CheckBox) findViewById(R.id.checkBox2);
        checkBox3 = (CheckBox) findViewById(R.id.checkBox3);
        checkBox4 = (CheckBox) findViewById(R.id.checkBox4);
        gridLayout = (GridLayout) findViewById(R.id.gridLayout_sec);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.button_sec:
                index++;
                Button button = new Button(this);
                button.setText("我是按钮" + index);
                button.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
                button.setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        gridLayout.setLayoutTransition(getLayoutTransition());
                        gridLayout.removeView(v);
                    }
                });
                gridLayout.setLayoutTransition(getLayoutTransition());
                gridLayout.addView(button, 0);
                break;
        }
    }

    //与使用自定义属性最大的不同在于此处，我们分别为APPEARING、DISAPPEARING指定不同的效果
    public LayoutTransition getLayoutTransition() {
        LayoutTransition layoutTransition = new LayoutTransition();
        ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(gridLayout, "scaleX", 1, 0, 1).setDuration(2000);
        ObjectAnimator objectAnimator2 = ObjectAnimator.ofFloat(gridLayout, "ScaleY", 1, 0, 1).setDuration(2000);
        if (checkBox1.isChecked()) {
            layoutTransition.setAnimator(LayoutTransition.APPEARING, objectAnimator);
        }
        if (checkBox2.isChecked()) {
            layoutTransition.setAnimator(LayoutTransition.DISAPPEARING, objectAnimator2);
        }
        if (checkBox3.isChecked()) {
            //设置当新控件添加后，受影响的四个上下左右的移动
            PropertyValuesHolder holderTop = PropertyValuesHolder.ofInt("top", 0, 1);
            PropertyValuesHolder holderBottom = PropertyValuesHolder.ofInt("bottom", 0, 1);
            PropertyValuesHolder holderLeft = PropertyValuesHolder.ofInt("left", 0, 1);
            PropertyValuesHolder holderRight = PropertyValuesHolder.ofInt("right", 0, 1);
            final ObjectAnimator objectAnimator1 = new ObjectAnimator().ofPropertyValuesHolder(this, holderTop, holderBottom, holderLeft, holderRight).setDuration(2000);
            objectAnimator1.addListener(new Animator.AnimatorListener() {
                @Override
                public void onAnimationStart(Animator animation) {
                }

                @Override
                public void onAnimationEnd(Animator animation) {
                    //这是设置其他子控件的显示效果的代码
                    View view = (View) ((ObjectAnimator) animation).getTarget();
                    //对其他的子控件进行设置，移动到相应的位置后的动画，我这里设置的是旋转
                    view.setAnimation(AnimationUtils.loadAnimation(getApplicationContext(), R.anim.add));

//                    1代表原来大小，即表示不改变大小，一般这个用不到
//                    view.setScaleX(1);
//                    view.setScaleY(1);
                }

                @Override
                public void onAnimationCancel(Animator animation) {

                }

                @Override
                public void onAnimationRepeat(Animator animation) {

                }
            });
            layoutTransition.setAnimator(LayoutTransition.CHANGE_DISAPPEARING, objectAnimator1);
        }
        if (checkBox4.isChecked()) {
            //下面四个方法最好用ofInt，如果用ofFloat动画会出错，效果不理想，具体原因我也不太清楚
            PropertyValuesHolder holderTop = PropertyValuesHolder.ofInt("top", 0, 1);
            PropertyValuesHolder holderBottom = PropertyValuesHolder.ofInt("bottom", 0, 1);
            PropertyValuesHolder holderLeft = PropertyValuesHolder.ofInt("left", 0, 1);
            PropertyValuesHolder holderRight = PropertyValuesHolder.ofInt("right", 0, 1);
            final ObjectAnimator objectAnimator1 = new ObjectAnimator().ofPropertyValuesHolder(this, holderTop, holderBottom, holderLeft, holderRight).setDuration(2000);
            objectAnimator1.addListener(new Animator.AnimatorListener() {
                @Override
                public void onAnimationStart(Animator animation) {
                }

                @Override
                public void onAnimationEnd(Animator animation) {
                    //这是设置其他子控件的大小的代码
                    View view = (View) ((ObjectAnimator) animation).getTarget();
                    //对其他的子控件进行设置，移动到相应的位置后的动画，我这里设置的是旋转
                    view.setAnimation(AnimationUtils.loadAnimation(getApplicationContext(), R.anim.add));

//                    1代表原来大小，即表示不改变大小，一般这个用不到
//                    view.setScaleX(1);
//                    view.setScaleY(1);
                }

                @Override
                public void onAnimationCancel(Animator animation) {

                }

                @Override
                public void onAnimationRepeat(Animator animation) {

                }
            });
            layoutTransition.setAnimator(LayoutTransition.CHANGE_APPEARING, objectAnimator1);
        }
        return layoutTransition;
    }
}

布局动画的使用

在xml文件中定义使用

• xml文件定义在res文件夹下新建的anim文件夹下
• translate.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="2000"
    android:interpolator="@android:anim/accelerate_decelerate_interpolator">

    <translate
        android:fromXDelta="-100%"
        android:toXDelta="0"></translate>
</set>

• layoutanimation_my.xml
• 其中的delay=”0.5”，表示的是animation=”@anim/translate”对应的xml文件中的duration*delay的时间为延时时间

<?xml version="1.0" encoding="utf-8"?>
<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
    android:animationOrder="normal"
    android:delay="0.5"
    android:animation="@anim/translate">
</layoutAnimation>

• 定义完毕xml文件后，我们就需要在布局文件中进行引用就可以了

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="0dip"
        android:layout_weight="1"
        android:layoutAnimation="@anim/layoutanimation_my"></ListView>

在代码中定义使用

- 代码大概就是上图这样的逻辑，这里博主就偷下懒不再敲了，效果和上面的效果图一致。