Animation是一个用于View,Surfaces和其它对象实现动画效果的抽象类,其中常用的类是TranslateAnimation用于控制位置的改变
一下列出一些重要的属性和方法
Xml属性
android:duration:运行动画的时间
android:interpolator:定义用于平滑动画运动的时间内插
android:repeatCount:定义动画重复的时间
方法:
set:RepeatCount(int ):定义动画重复的时间
setRepeatMode(int):通过设置重复时间定义动画的行为
setStartOffset(long):以毫秒为单位的动画运行前的延迟,一旦开始时间就达到了
Cancel():取消动画
hasStarted():判断动画是否已在运行
initialize(int width, int height, int parentWidth, int parentHeight):初始化动画
reset():重置动画
Start()启动动画
其中还有一些常量
RESTART:重新运行
INFINITE:永无终止地运行
将动画用于指定的控件,所有继承自View的控件都有startAnimation(Animation)方法,通过调用此方法来应用动画于控件
AnimationUtils类介绍
为应用动画提供了通用的的方法,它有一个很重要的方法loadAnimation(Context,Animation)用于加载Animation的实例。
下面是一个实例 源码下载
Animationpage.xml是布局文件
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:padding="10dip" android:layout_width="match_parent" android:layout_height="wrap_content"> <ImageView android:id="@+id/pw" android:background="@drawable/a" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginBottom="10dip" /> <Button android:id="@+id/login" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="26sp" android:text="震荡" /> <ViewFlipper android:id="@+id/flipper" android:layout_width="match_parent" android:layout_height="wrap_content" android:flipInterval="2000" > <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:textSize="26sp" android:text="吴建强"/> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:textSize="26sp" android:text="李秀婷"/> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:textSize="26sp" android:text="张美静"/> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center_horizontal" android:textSize="26sp" android:text="吴美音"/> </ViewFlipper> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginBottom="5dip" android:text="请选择你喜欢的人" /> <Spinner android:id="@+id/spinner" android:layout_width="match_parent" android:layout_height="wrap_content" /> <TextView android:id="@+id/target" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="26sp" android:text="java语言"/> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dip" android:layout_marginBottom="5dip" android:text="C#语言" /> <Spinner android:id="@+id/spinner1" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout> Animlayout.xml是动画文件 <?xml version="1.0" encoding="utf-8"?> <translate xmlns:android="http://schemas.android.com/apk/res/android" android:fromXDelta="0" android:toXDelta="10" android:duration="1000" android:interpolator="@anim/cycle_7" /> 。。。
主程序
package wjq.WidgetDemo; import android.app.Activity; import android.os.Bundle; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.view.animation.Transformation; import android.view.animation.TranslateAnimation; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.ViewFlipper; import android.widget.AdapterView.OnItemSelectedListener; /** * 动画Animation示例 * @author 记忆的永恒 * */ public class AnimationDemo extends Activity implements OnClickListener, OnItemSelectedListener { private View v; private String[] mStrings = { "向上", "向右", "穿越", "旋转" }; private static final String[] INTERPOLATORS = { "加速", "Decelerate", "减速", "左右", "Overshoot", "Anticipate/Overshoot", "弹回" }; private ViewFlipper mFlipper; private Spinner spinner; private Spinner spinner1; private ArrayAdapter<String> aa; private ArrayAdapter<String> aa1; /* * (non-Javadoc) * * @see android.app.Activity#onCreate(android.os.Bundle) */ @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.animationpage); v = findViewById(R.id.login); v.setOnClickListener(this); mFlipper = (ViewFlipper) findViewById(R.id.flipper); // 反转 mFlipper.startFlipping(); spinner = (Spinner) findViewById(R.id.spinner); aa = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, mStrings); aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(aa); spinner.setOnItemSelectedListener(this); spinner1 = (Spinner) findViewById(R.id.spinner1); aa1 = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, INTERPOLATORS); aa1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner1.setAdapter(aa1); spinner1.setOnItemSelectedListener(this); } @Override public void onClick(View v) { Animation shake = AnimationUtils.loadAnimation(this, R.anim.animlayout); findViewById(R.id.pw).startAnimation(shake); } @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { if (parent.getAdapter()==aa) { switch (position) { case 0: mFlipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_up_in)); mFlipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_up_out)); break; case 1: mFlipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_in)); mFlipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out)); break; case 2: mFlipper.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in)); mFlipper.setOutAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out)); break; default: mFlipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.hyperspace_in)); mFlipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.hyperspace_out)); break; } } else { final View target = findViewById(R.id.target); final View targetParent = (View) target.getParent(); Animation anm = new TranslateAnimation(0.0f, targetParent .getWidth() - target.getWidth() - targetParent.getPaddingLeft() - targetParent.getPaddingRight(), 0.0f, 0.0f); anm.setDuration(1000); anm.setStartOffset(300); anm.setRepeatMode(Animation.RESTART); anm.setRepeatCount(Animation.INFINITE); switch (position) { case 0: anm.setInterpolator(AnimationUtils.loadInterpolator(this, android.R.anim.accelerate_interpolator)); break; case 1: anm.setInterpolator(AnimationUtils.loadInterpolator(this, android.R.anim.decelerate_interpolator)); break; case 2: anm.setInterpolator(AnimationUtils.loadInterpolator(this, android.R.anim.accelerate_decelerate_interpolator)); break; case 3: anm.setInterpolator(AnimationUtils.loadInterpolator(this, android.R.anim.anticipate_interpolator)); break; case 4: anm.setInterpolator(AnimationUtils.loadInterpolator(this, android.R.anim.overshoot_interpolator)); break; case 5: anm.setInterpolator(AnimationUtils.loadInterpolator(this, android.R.anim.anticipate_overshoot_interpolator)); break; case 6: anm.setInterpolator(AnimationUtils.loadInterpolator(this, android.R.anim.bounce_interpolator)); break; } target.startAnimation(anm); } } @Override public void onNothingSelected(AdapterView parent) { // TODO Auto-generated method stub } }