属性动画会改变控件真实的坐标
如果使用xml方式定义属性动画 要在res下创建一个animator目录
public class MainActivity extends Activity { private ImageView iv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //加载的布局 setContentView(R.layout.activity_main); //找到iv 执行动画 iv = (ImageView) findViewById(R.id.iv); //设置了一个点击事件 iv.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this, "你点不到我", 0).show(); } }); // iv.setTranslationX(translationX) // iv.setScaleX(scaleX) // iv.setAlpha(alpha) // iv.setRotation(rotation) } //位移动画 public void translate(View v){ //创建属性动画 /** * target 执行的目标 * propertyName 属性名字 The name of the property being animated. * float... values 可变参数 */ ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "translationX", 10, 50,20,100); oa.setDuration(2000); oa.start(); //开始动画 } //缩放动画 public void scale(View v){ ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "scaleY", 0.1f, 2, 1, 2); oa.setDuration(2000); oa.start(); } //实现透明的效果 public void alpha(View v){ ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "alpha", 0, 0.5f, 0, 1,0,1); oa.setDuration(2000); oa.start(); } //实现旋转的效果 public void rotate(View v){ // ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "rotation", 0, 180, 90, 360); ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "rotationX", 0, 180, 90, 360); oa.setDuration(2000); oa.start(); } //一起飞 public void fly(View v){ AnimatorSet as = new AnimatorSet(); ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "translationX", 10, 50, 20, 100); ObjectAnimator oa2 = ObjectAnimator.ofFloat(iv, "scaleY", 0.1f, 2, 1, 2); ObjectAnimator oa3 = ObjectAnimator.ofFloat(iv, "alpha", 0, 0.5f, 0, 1); ObjectAnimator oa4 = ObjectAnimator.ofFloat(iv, "rotationY", 0, 180, 90, 360); as.setDuration(2000);//执行动画时长 as.setTarget(iv);//iv执行动画 //往集合中添加动画 //挨个飞 as.playSequentially(oa, oa2, oa3, oa4); //一起飞 // as.playTogether(oa, oa2, oa3, oa4); as.start(); } //使用xml的方式创建属性动画 public void playxml(View v){ ObjectAnimator oa = (ObjectAnimator) AnimatorInflater.loadAnimator(this, R.animator.oanimator); //设置执行目标 oa.setTarget(iv); oa.start();//开始执行 } }
oanimator.xml
<?xml version="1.0" encoding="utf-8"?> <animator xmlns:android="http://schemas.android.com/apk/res/android" > <objectAnimator android:propertyName="translationX" android:duration="2000" android:valueFrom="10" android:valueTo="100" ></objectAnimator> </animator>