1、新建文件。【注意:文件名只能命名为anim】
2、新建文件
3、在新建的文件中添加代码:【以下代码仅供参考】
3.1、改变动画的透明度:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha
android:interpolator="@android:anim/linear_interpolator"
android:repeatMode="reverse"
android:repeatCount="infinite"
android:duration="1000" //持续时间
android:fromAlpha="1.0"
android:toAlpha="0.0"/>
</set>
3.2、动画旋转 :
<?xml version="1.0" encoding="utf-8"?>
<!--suppress ALL -->
<set xmlns:android="http://schemas.android.com/apk/res/android">
<!-- 反向旋转-->
<rotate
android:fromDegrees="0"
android:toDegrees="360" //旋转360°
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="-1"
android:repeatMode="reverse"
android:duration="1000"/>
<!-- 正向旋转-->
<!-- <rotate-->
<!-- android:fromDegrees="0"-->
<!-- android:toDegrees="360"-->
<!-- android:pivotX="50%"-->
<!-- android:pivotY="50%"-->
<!-- android:repeatCount="-1"-->
<!-- android:repeatMode="restart"-->
<!-- android:duration="1000"/>-->
</set>
3.3、动画缩放:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:fromXScale="1.0"
android:fromYScale="1.0"
android:toXScale="0.5"
android:toYScale="0.5"
android:pivotX="50%"
android:pivotY="50%"
android:repeatMode="reverse"
android:repeatCount="infinite"
android:duration="3000"/>
</set>
3.4、动画平移:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="0.0"
android:fromYDelta="0.0"
android:toXDelta="100"
android:toYDelta="0.0"
android:repeatCount="infinite"
android:repeatMode="reverse"
android:duration="4000"/>
</set>
Java代码如下:【仅供参考】
//这里用到了多个按钮,直接实现OnClickListener()方法
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private ImageView ima;
private Button btn1;
private Button btn2;
private Button btn3;
private Button btn4;
private Button btn5;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
ima = (ImageView) findViewById(R.id.ima);
btn1 = (Button) findViewById(R.id.btn1);
btn2 = (Button) findViewById(R.id.btn2);
btn3 = (Button) findViewById(R.id.btn3);
btn4 = (Button) findViewById(R.id.btn4);
btn5 = (Button) findViewById(R.id.btn5);
btn1.setOnClickListener(this);
btn2.setOnClickListener(this);
btn3.setOnClickListener(this);
btn4.setOnClickListener(this);
btn5.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.btn1:
Animation alpha = AnimationUtils.loadAnimation(this,R.anim.alpha_animation);//透明度,渐变
ima.startAnimation(alpha);//开启动画
break;
case R.id.btn2:
Animation rotate = AnimationUtils.loadAnimation(this,R.anim.rotate_animation);//旋转
ima.startAnimation(rotate);
break;
case R.id.btn3:
Animation translate = AnimationUtils.loadAnimation(this,R.anim.translate_animation);//平移
ima.startAnimation(translate);
break;
case R.id.btn4:
Animation scale =AnimationUtils.loadAnimation(this,R.anim.scale_animation);//缩放
ima.startAnimation(scale);
break;
case R.id.btn5:
ima.clearAnimation();//动画暂停
break;
}
}
}
效果演示参考如下链接: