Android动画之属性动画

Android动画之属性动画

android:layout_width=“match_parent”

android:layout_height=“wrap_content”

android:orientation=“horizontal”>

android:id="@+id/btn_alpha"

android:layout_width=“0dp”

android:layout_height=“40dp”

android:layout_weight=“1”

android:text=“透明动画” />

android:id="@+id/btn_translate"

android:layout_width=“0dp”

android:layout_height=“40dp”

android:layout_weight=“1”

android:text=“位移动画” />

android:id="@+id/btn_rotate"

android:layout_width=“0dp”

android:layout_height=“40dp”

android:layout_weight=“1”

android:text=“旋转动画” />

android:id="@+id/btn_scale"

android:layout_width=“0dp”

android:layout_height=“40dp”

android:layout_weight=“1”

android:text=“缩放动画” />

android:id="@+id/iv_show"

android:layout_width=“wrap_content”

android:layout_height=“wrap_content”

android:layout_centerInParent=“true”

android:src="@mipmap/ic_launcher" />

android:layout_width=“match_parent”

android:layout_height=“wrap_content”

android:layout_alignParentBottom=“true”

android:onClick=“groupshow”

android:text=“组合显示” />

ThirdActivity.java文件：

//属性动画

public class ThirdActivity extends AppCompatActivity implements View.onClickListener {

private Button btn_alpha;

private Button btn_translate;

private Button btn_rotate;

private Button btn_scale;

private ImageView iv_show;

ObjectAnimator objectAnimator;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_third);

initView();

}

private void initView() {

btn_alpha = (Button) findViewById(R.id.btn_alpha);

btn_translate = (Button) findViewById(R.id.btn_translate);

btn_rotate = (Button) findViewById(R.id.btn_rotate);

btn_scale = (Button) findViewById(R.id.btn_scale);

iv_show = (ImageView) findViewById(R.id.iv_show);

btn_alpha.setonClickListener(this);

btn_translate.setonClickListener(this);

btn_rotate.setonClickListener(this);

btn_scale.setonClickListener(this);

}

@Override

public void onClick(View v) {

//ofFloat:三个参数 ：1.受到动画影响的对象（UI控件）2. 要执行的动画类型 3. 一组动画的属性

switch (v.getId()) {

case R.id.btn_alpha://透明动画

objectAnimator = ObjectAnimator.ofFloat(iv_show, “alpha”, 0.5f, 1f, 0.5f, 1f);

break;

case R.id.btn_translate://位移动画

//只会执行一个

objectAnimator = ObjectAnimator.ofFloat(iv_show, “translationX”, 0, 200);

//objectAnimator=ObjectAnimator.ofFloat(iv_show,“translationY”,0,200);

break;

case R.id.btn_rotate://旋转动画

objectAnimator = ObjectAnimator.ofFloat(iv_show, “rotation”, 0, 90f, 180f, 90f, 45f, 100f);

break;

case R.id.btn_scale://缩放动画

//只会执行一个

objectAnimator = ObjectAnimator.ofFloat(iv_show, “scaleY”, 1f, 2f, 3f, 4f);

// objectAnimator=ObjectAnimator.ofFloat(iv_show,“scaleX”,1f,2f,3f,4f);

break;

}

//动画持续时间

objectAnimator.setDuration(3000);

//启动动画

objectAnimator.start();

}

public void groupshow(View view) {//组合

ObjectAnimator objectAnimator1 = ObjectAnimator.ofFloat(iv_show, “scaleY”, 1f, 2f, 1f, 2f);

ObjectAnimator objectAnimator2 = ObjectAnimator.ofFloat(iv_show, “scaleX”, 1f, 2f, 1f, 2f);

ObjectAnimator objectAnimator3 = ObjectAnimator.ofFloat(iv_show, “rotation”, 0, 90f, 180f, 90f, 45f, 100f);

//创建属性动画的集合容器

AnimatorSet animatorSet = new AnimatorSet();

//同时播放

animatorSet.play(objectAnimator1).with(objectAnimator2).with(objectAnimator3);