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 完成该动画效果
创建xml文件：右键res->选择android xml file
创建完成之后会在res目录下生成一个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中只需要 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>
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