Android中有四种动画效果：
AlphaAnimation：透明度动画效果
ScaleAnimation：缩放动画效果
TranslateAnimation：位移动画效果
RotateAnimation：旋转动画效果
1.透明动画效果
public class MainActivity extends Activity {
private AlphaAnimation aa;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
aa = new AlphaAnimation(1, 0);
aa.setDuration(3000);
// 设置监听事件
aa.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
Toast.makeText(MainActivity.this, "start", 0).show();
}
@Override
public void onAnimationRepeat(Animation animation) {
Toast.makeText(MainActivity.this, "repeat", 0).show();
}
@Override
public void onAnimationEnd(Animation animation) {
Toast.makeText(MainActivity.this, "end", 0).show();
}
});
findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
v.startAnimation(aa);
}
});
}
}
通过xml配置文件 完毕该动画效果
创建xml文件：右键res->选择android xml file
创建完毕之后会在res文件夹下生成一个anim文件夹
aa.xml：
<?xml version="1.0" encoding="utf-8"?>
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="3000"
android:fromAlpha="1"
android:toAlpha="0" >
</alpha>
Activity中仅仅须要 声明 AlphaAnimation 并在Button的监听事件中 调用
v.setAnimation (AnimationUtils.loadAnimation(MainActivity.this,R.anim.aa));
效果是一样的。
2. 缩放动画效果
public class MainActivity extends Activity {
private ScaleAnimation sa;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sa = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF, 0.5f);
sa.setDuration(2000);
findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
v.startAnimation(sa);
}
});
}
}
通过xml文件：
<?xml version="1.0" encoding="utf-8"?>
<scale xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="2000"
android:fromXScale="0"
android:fromYScale="0"
android:pivotX="50%"
android:pivotY="50%"
android:toXScale="1"
android:toYScale="1" >
</scale>
3. 位移动画效果
public class MainActivity extends Activity {
private TranslateAnimation ta;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ta = new TranslateAnimation(0, 200, 0, 200);
ta.setDuration(2000);
findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
v.startAnimation(ta);
// v.startAnimation(AnimationUtils.loadAnimation(
// MainActivity.this, R.anim.ta));
}
});
}
}
xml:
<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="2000"
android:fromXDelta="0"
android:fromYDelta="0"
android:toXDelta="200"
android:toYDelta="200" >
</translate>
4. 旋转动画效果
public class MainActivity extends Activity {
private RotateAnimation ra;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// ra = new RotateAnimation(0, 360);
// ra = new RotateAnimation(0, 360, 50, 150);
ra = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF, 0.5f);
ra.setDuration(2000);
findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
v.startAnimation(ra);
}
});
}
}
动画混合：
AnimationSet
public class MainActivity extends Activity {
AnimationSet as ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
as = new AnimationSet(true);
as.setDuration(2000);
AlphaAnimation aa = new AlphaAnimation(0, 1);
aa.setDuration(2000);
TranslateAnimation ta = new TranslateAnimation(0, 200, 0, 200);
ta.setDuration(2000);
as.addAnimation(ta);
as.addAnimation(aa);
findViewById(R.id.btn).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
v.startAnimation(as);
}
});
}
}
创建Xml文件选择set：
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android" android:duration="2000" android:shareInterpolator="true" > <alpha android:fromAlpha="0" android:toAlpha="1" /> <translate android:fromXDelta="0" android:fromYDelta="0" android:toXDelta="200" android:toYDelta="200" /> </set>