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这期内容当中小编将会给大家带来有关怎么在Android中实现属性动画，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
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MainActivity.java
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private ImageButton imageView;
private Button alpha_bt;
private Button rotationY_bt;
private Button scaleX_bt;
private Button translationX_bt;
private Button AnimatorSet_bt;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 对控件进行初始化
init();
// 此处用的是xml的形式.引用在Xml里的属性动画资源. AnimatorInflater.loadAnimator(上下文,R.animator..)222
Animator Xmlanimator = AnimatorInflater.loadAnimator(this, R.animator.objectanimator);
// 把要做动画控件对象放进去.Animator.setTarget(View对象);222
Xmlanimator.setTarget(imageView);
// 开启动画.Animator.start.222
Xmlanimator.start();
}
// 对于控件进行初始化
private void init() {
//找到ImageView控件对象
imageView = (ImageButton) findViewById(R.id.animation_iv);
//找到Button控件对象.
alpha_bt = (Button) findViewById(R.id.alpha_bt);
rotationY_bt = (Button) findViewById(R.id.rotationY_bt);
scaleX_bt = (Button) findViewById(R.id.scaleX_bt);
translationX_bt = (Button) findViewById(R.id.translationY_bt);
AnimatorSet_bt = (Button) findViewById(R.id.AnimatorSet_bt);
//为button设置点击事件
alpha_bt.setOnClickListener(this);
rotationY_bt.setOnClickListener(this);
scaleX_bt.setOnClickListener(this);
translationX_bt.setOnClickListener(this);
AnimatorSet_bt.setOnClickListener(this);
}
/**
* 根据点击事件类型.调用控件做属性动画的
*
* @param view
*/
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.alpha_bt:
//做透明动画,参数1:View,代表你要修改那个控件的属性. 参数2:propertyName代表实现什么样子的动画:"alpha",String类型.
//参数3:float... values,控件修改的参数,new float[]{0.0f, 0.2f, 0.4f, 0.6f, 0.8f, 1.0f}
ObjectAnimator alpha = ObjectAnimator.ofFloat(imageView, "alpha", new float[]{0.0f, 0.2f, 0.4f, 0.6f, 0.8f, 1.0f});
//设置动画执行时长.setDuration
alpha.setDuration(2000);
//设置动画执行的模式setRepeatMode,参数用ObjectAnimator引用.
alpha.setRepeatMode(ObjectAnimator.RESTART);
//设置动画执行的次数.setRepeatCount
alpha.setRepeatCount(1);
//使用ObjectAnimator对象开启动画.
alpha.start();
break;
case R.id.rotationY_bt:
//做旋转动画,"rotationY".rotationX,rotation new float[]{90f, 180f, 270f, 360f}
ObjectAnimator rotationY = ObjectAnimator.ofFloat(imageView, "rotationY", new float[]{90f, 180f, 270f, 360f});
rotationY.setDuration(2000);
rotationY.setRepeatMode(ObjectAnimator.RESTART);
rotationY.setRepeatCount(1);
rotationY.start();
break;
case R.id.scaleX_bt:
//做缩放动画,scaleX,scaleY new float[]{1f, 2f, 3f, 4f, 5f, 6f,1f}
ObjectAnimator scaleX = ObjectAnimator.ofFloat(imageView, "scaleX", new float[]{1f, 2f, 3f, 4f, 5f, 6f, 1f});
scaleX.setDuration(2000);
scaleX.setRepeatMode(ObjectAnimator.RESTART);
scaleX.setRepeatCount(1);
scaleX.start();
break;
case R.id.translationY_bt:
//做平移动画,translationY,translationX new float[]{10f, 20f, 30f, 40f, 60f, 80f}
ObjectAnimator translationY = ObjectAnimator.ofFloat(imageView, "translationY", new float[]{10f, 20f, 30f, 40f, 60f, 80f});
translationY.setDuration(2000);
translationY.setRepeatMode(ObjectAnimator.RESTART);
translationY.setRepeatCount(1);
translationY.start();
//做动画集合AnimatorSet,分别创建两个动画对象.注意playTogether(动画对象...)和playSequentially的区别.最后开启动画.start
case R.id.AnimatorSet_bt:
AnimatorSet set = new AnimatorSet();
ObjectAnimator oa = ObjectAnimator.ofFloat(imageView, "translationX", new float[]{10f, 20f, 30f, 40f, 60f, 80f});
oa.setDuration(3000);
ObjectAnimator oa2 = ObjectAnimator.ofFloat(imageView, "translationY", new float[]{-10f, -20f, -30f, -40f, -60f, -80f});
oa2.setDuration(3000);
set.playTogether(oa, oa2);
set.start();
break;
default:
break;
}
}
}activity_main.xml