android 控件异动动画 android控件显示隐藏动画

MainActivity.java
package com.llw.animationdemo;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private ImageView ivLogo, ivAlphaLogo, ivTranslateLogo, ivScaleLogo;
private Button btnShow, btnHide, btnAlphaShow, btnAlphaHide, btnTranslateShow,
btnTranslateHide, btnScaleShow, btnScaleHide;
private AlphaAnimation alphaAniShow, alphaAniHide;
private TranslateAnimation translateAniShow, translateAniHide;
private Animation bigAnimation, smallAnimation;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
//初始化控件
private void initView() {
ivLogo = (ImageView) findViewById(R.id.iv_logo);
ivAlphaLogo = (ImageView) findViewById(R.id.iv_alpha_logo);
ivTranslateLogo = (ImageView) findViewById(R.id.iv_translate_logo);
ivScaleLogo = (ImageView) findViewById(R.id.iv_scale_logo);
btnShow = (Button) findViewById(R.id.btn_show);
btnHide = (Button) findViewById(R.id.btn_hide);
btnAlphaShow = (Button) findViewById(R.id.btn_alpha_show);
btnAlphaHide = (Button) findViewById(R.id.btn_alpha_hide);
btnTranslateShow = (Button) findViewById(R.id.btn_translate_show);
btnTranslateHide = (Button) findViewById(R.id.btn_translate_hide);
btnScaleShow = (Button) findViewById(R.id.btn_scale_show);
btnScaleHide = (Button) findViewById(R.id.btn_scale_hide);
btnShow.setOnClickListener(this);
btnHide.setOnClickListener(this);
btnAlphaShow.setOnClickListener(this);
btnAlphaHide.setOnClickListener(this);
btnTranslateShow.setOnClickListener(this);
btnTranslateHide.setOnClickListener(this);
btnScaleShow.setOnClickListener(this);
btnScaleHide.setOnClickListener(this);
alphaAnimation();
scaleAnimation();
translateAnimation();
}
//位移动画
private void translateAnimation() {
//向上位移显示动画 从自身位置的最下端向上滑动了自身的高度
translateAniShow = new TranslateAnimation(
Animation.RELATIVE_TO_SELF,//RELATIVE_TO_SELF表示操作自身
0,//fromXValue表示开始的X轴位置
Animation.RELATIVE_TO_SELF,
0,//fromXValue表示结束的X轴位置
Animation.RELATIVE_TO_SELF,
1,//fromXValue表示开始的Y轴位置
Animation.RELATIVE_TO_SELF,
0);//fromXValue表示结束的Y轴位置
translateAniShow.setRepeatMode(Animation.REVERSE);
translateAniShow.setDuration(1000);
//向下位移隐藏动画 从自身位置的最上端向下滑动了自身的高度
translateAniHide = new TranslateAnimation(
Animation.RELATIVE_TO_SELF,//RELATIVE_TO_SELF表示操作自身
0,//fromXValue表示开始的X轴位置
Animation.RELATIVE_TO_SELF,
0,//fromXValue表示结束的X轴位置
Animation.RELATIVE_TO_SELF,
0,//fromXValue表示开始的Y轴位置
Animation.RELATIVE_TO_SELF,
1);//fromXValue表示结束的Y轴位置
translateAniHide.setRepeatMode(Animation.REVERSE);
translateAniHide.setDuration(1000);
}
//缩放动画
private void scaleAnimation() {
//放大
bigAnimation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.scale_big);
//缩小
smallAnimation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.scale_small);
}
//透明度动画
private void alphaAnimation() {
//显示
alphaAniShow = new AlphaAnimation(0, 1);//百分比透明度，从0%到100%显示
alphaAniShow.setDuration(1000);//一秒
//隐藏
alphaAniHide = new AlphaAnimation(1, 0);
alphaAniHide.setDuration(1000);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_show://普通显示
ivLogo.setVisibility(View.VISIBLE);
break;
case R.id.btn_hide://普通隐藏
ivLogo.setVisibility(View.INVISIBLE);
break;
case R.id.btn_alpha_show://透明度显示
ivAlphaLogo.startAnimation(alphaAniShow);
ivAlphaLogo.setVisibility(View.VISIBLE);
break;
case R.id.btn_alpha_hide://透明度隐藏
ivAlphaLogo.startAnimation(alphaAniHide);
//这个地方为什么要做动画的监听呢，因为隐藏和显示不一样，
//必须在动画结束之后再隐藏你的控件，这样才不会显得很突兀
alphaAniHide.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
ivAlphaLogo.setVisibility(View.INVISIBLE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
break;
case R.id.btn_scale_show://放大显示
ivScaleLogo.startAnimation(bigAnimation);
ivScaleLogo.setVisibility(View.VISIBLE);
break;
case R.id.btn_scale_hide://缩小隐藏
ivScaleLogo.startAnimation(smallAnimation);
smallAnimation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
ivScaleLogo.setVisibility(View.INVISIBLE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
break;
case R.id.btn_translate_show://向上位移显示
ivTranslateLogo.startAnimation(translateAniShow);
ivTranslateLogo.setVisibility(View.VISIBLE);
break;
case R.id.btn_translate_hide://向下位移隐藏
ivTranslateLogo.startAnimation(translateAniHide);
translateAniHide.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
ivTranslateLogo.setVisibility(View.INVISIBLE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
break;
}
}
}

还有两个动画xml文件，如下：

scale_big.xml
 <?xml version="1.0" encoding="utf-8"?> 
<scale xmlns:android=“http://schemas.android.com/apk/res/android”
android:duration=“1000”
android:fromXScale=“0”
android:fromYScale=“0”
android:pivotX=“50%”
android:pivotY=“50%”
android:toXScale=“1”
android:toYScale=“1” />
scale_small.xml
 <?xml version="1.0" encoding="utf-8"?> 
<scale xmlns:android=“http://schemas.android.com/apk/res/android”
android:duration=“1000”
android:fromXScale=“1”
android:fromYScale=“1”
android:pivotX=“50%”
android:pivotY=“50%”
android:toXScale=“0”
android:toYScale=“0” />