Android 动画

帧动画

AnimationDrawable

属性

android:duration=“2000” 动画持续时间。即这个动画会持续多长时间，单位(ms)
android:fillAfter=“false” 动画播放完毕后，是否会停止在动画结束的状态，优先存在于fillBefore
android:fillBefore=“true” 动画播放完毕后，是否会恢复原始状态
android:fillEnabled=“true” 是否应用与fillBefore的值，默认:true
android:fromXScale=“1” X轴起始缩放倍数
android:fromYScale=“1” Y轴起始缩放倍数
android:pivotX=“50%” 缩放轴点X坐标
android:pivotY=“50%” 缩放轴点Y坐标
android:repeatCount=“0” 重复次数，值infinite为无限一直重复
android:repeatMode=“restart” 播放的动画模式restart表示正序播放，reverse代表倒序播放，默认是restart
android:startOffset=“0” 动画延迟开始时间(多长时间后开始执行动画)
android:toXScale=“2.5” 缩放轴点的X坐标
android:toYScale=“2.5” 缩放轴点的Y坐标

补间(Tween)动画

	平移动画
	TranslateAnimation translateAnimation = new TranslateAnimation(0,0,0,200);
	缩放动画
    ScaleAnimation scaleAnimation = new ScaleAnimation(1.0f,0.5f,1.0f,0.5f);
    旋转动画
    RotateAnimation rotateAnimation = new RotateAnimation(0,360,50,5);
    透明动画
    AlphaAnimation alphaAnimation = new AlphaAnimation(1.0f,0.0f);

代码实现

package com.example.animationsdemo;

import android.animation.AnimatorSet;
import android.support.v7.app.AppCompatActivity;
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.AnimationUtils;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

    Button button1,button2,button3,button4,button5;
    ImageView imageView;

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

        button1 = findViewById(R.id.set_alpha);
        button2 = findViewById(R.id.set_rotate);
        button3 = findViewById(R.id.set_translate);
        button4 = findViewById(R.id.set_scale);
        button5 = findViewById(R.id.set_all);
        imageView = findViewById(R.id.image);

        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                alpha();
            }
        });
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                rotate();
            }
        });
        button3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                translate();
            }
        });
        button4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                scale();
            }
        });
        button5.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                all();
            }
        });

    }

    private void scale() {
        ScaleAnimation scaleAnimation = new ScaleAnimation(1.0f,0.5f,1.0f,0.5f);
        scaleAnimation.setDuration(3000);
        scaleAnimation.setRepeatCount(1);
        imageView.startAnimation(scaleAnimation);
    }

    private void translate() {
        TranslateAnimation translateAnimation = new TranslateAnimation(0,0,0,200);
        translateAnimation.setDuration(3000);
        translateAnimation.setRepeatCount(1);
        imageView.startAnimation(translateAnimation);
    }

    private void all() {
        TranslateAnimation translateAnimation = new TranslateAnimation(0,0,0,200);
        ScaleAnimation scaleAnimation = new ScaleAnimation(1.0f,0.5f,1.0f,0.5f);
        RotateAnimation rotateAnimation = new RotateAnimation(0,360,50,5);

        AnimationSet animationSet = new AnimationSet(this,null);
        animationSet.addAnimation(scaleAnimation);
        animationSet.addAnimation(rotateAnimation);
        animationSet.addAnimation(translateAnimation);
        animationSet.setDuration(5000);
        imageView.startAnimation(animationSet);

    }

    private void rotate() {
        RotateAnimation rotateAnimation = new RotateAnimation(0,360,50,5);
        rotateAnimation.setDuration(3000);
        rotateAnimation.setRepeatCount(2);
        imageView.startAnimation(rotateAnimation);

    }

    private void alpha() {

        Animation animation = AnimationUtils.loadAnimation(this,R.anim.alpha);
        imageView.startAnimation(animation);

//        AlphaAnimation alphaAnimation = new AlphaAnimation(1.0f,0.0f);
//        alphaAnimation.setRepeatCount(3);
//        alphaAnimation.setRepeatMode(Animation.REVERSE);

    }
}