android动画基础--旋转移动平移缩放
16lz
2021-01-26
package com.imooc.viewanim;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.animation.AlphaAnimation;import android.view.animation.Animation;import android.view.animation.AnimationSet;import android.view.animation.RotateAnimation;import android.view.animation.ScaleAnimation;import android.view.animation.TranslateAnimation;public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void btnAlpha(View view) { //透明度动画 public AlphaAnimation(float fromAlpha, float toAlpha){} AlphaAnimation aa = new AlphaAnimation(0, 1); //持续时间 aa.setDuration(1000); view.startAnimation(aa); } public void btnRotate(View view) {// 旋转动画 public RotateAnimation(float fromDegrees, float toDegrees, float pivotX, float pivotY){}// 分别对应起始角度（toDegrees-fromDegrees），旋转中心点。 RotateAnimation ra = new RotateAnimation(90, 240, 50, 50); ra.setDuration(1000); view.startAnimation(ra); } public void btnRotateSelf(View view) { //旋转动画，设置旋转参考系 RotateAnimation ra = new RotateAnimation(0, 360, RotateAnimation.RELATIVE_TO_SELF, 0.5F, RotateAnimation.RELATIVE_TO_SELF, 0.5F); ra.setDuration(1000); view.startAnimation(ra); } public void btnTranslate(View view) { //平移动画 //自身中点做坐标原点（0,0） 向右移动200，向下移动300 TranslateAnimation ta = new TranslateAnimation(0, 200, 0, 300); ta.setDuration(1000); view.startAnimation(ta); } public void btnScale(View view) { //缩放动画 public ScaleAnimation(float fromX, float toX, float fromY, float toY){}// 向右放大2，向下放大2 ，后恢复 ScaleAnimation sa = new ScaleAnimation(0, 2, 0, 2); sa.setDuration(1000); view.startAnimation(sa); } public void btnScaleSelf(View view) { //缩放动画，设置缩放中心点。 ScaleAnimation sa = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5F, Animation.RELATIVE_TO_SELF, 0.5F); sa.setDuration(1000); view.startAnimation(sa); } //动画集合 public void btnSet(View view) { AnimationSet as = new AnimationSet(true); as.setDuration(1000); AlphaAnimation aa = new AlphaAnimation(0, 1); aa.setDuration(1000); as.addAnimation(aa); TranslateAnimation ta = new TranslateAnimation(0, 100, 0, 200); ta.setDuration(1000); as.addAnimation(ta); view.startAnimation(as); }}<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:orientation="vertical" android:gravity="center_horizontal" tools:context=".MainActivity"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Alpha" android:layout_margin="10dp" android:onClick="btnAlpha" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Rotate" android:layout_margin="10dp" android:onClick="btnRotate" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Rotate_self" android:layout_margin="10dp" android:onClick="btnRotateSelf" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Translate" android:layout_margin="10dp" android:onClick="btnTranslate" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Scale" android:layout_margin="10dp" android:onClick="btnScale" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Scale_Self" android:layout_margin="10dp" android:onClick="btnScaleSelf" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Anim Set" android:layout_margin="10dp" android:onClick="btnSet" />LinearLayout>更多相关文章
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