效果: http://www.56.com/u82/v_OTM4MDk5MTk.html
第一步: 創(chuàng)建anim文件夾放置動(dòng)畫xml文件
在res文件夾下，創(chuàng)建一個(gè)anim的子文件夾。
第二步: 加載動(dòng)畫
接著在Activity創(chuàng)建一個(gè)Animation類，然后使用AnimationUtils類加載動(dòng)畫xml
Animation animFadein;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fadein);
txtMessage = (TextView) findViewById(R.id.txtMessage);
btnStart = (Button) findViewById(R.id.btnStart);
// 加載動(dòng)畫
animFadein = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_in);
｝
第三步: 設(shè)置動(dòng)畫監(jiān)聽器
如果你要監(jiān)聽動(dòng)畫的事件，如開始，結(jié)束等，你需要實(shí)現(xiàn)AnimationListener監(jiān)聽器，重寫以下方法。
onAnimationEnd(Animation animation) - 當(dāng)動(dòng)畫結(jié)束時(shí)調(diào)用
onAnimationRepeat(Animation animation) - 當(dāng)動(dòng)畫重復(fù)時(shí)調(diào)用
onAniamtionStart(Animation animation) - 當(dāng)動(dòng)畫啟動(dòng)時(shí)調(diào)用
@Override
public void onAnimationEnd(Animation animation) {
// 在動(dòng)畫結(jié)束后使用
// check for fade in animation
if (animation == animFadein) {
Toast.makeText(getApplicationContext(), "Animation Stopped",
Toast.LENGTH_SHORT).show();
}
}
@Override
public void onAnimationRepeat(Animation animation) {
//當(dāng)動(dòng)畫重復(fù)時(shí)使用
}
@Override
public void onAnimationStart(Animation animation) {
//當(dāng)動(dòng)畫開始使用
}
最后一步: 讓動(dòng)畫動(dòng)起來啦。可以使用任何UI元素調(diào)用startAnimation方法。
以下是一個(gè)Textview元素調(diào)用的。
txtMessage.startAnimation(animFadein);
完整代碼:
FadeInActivity(淡入動(dòng)畫)
?package com.chaowen.androidanimations;
import info.androidhive.androidanimations.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.view.animation.Animation.AnimationListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
/**
*
* @author chaowen
*
*/
public class FadeInActivity extends Activity implements AnimationListener {
TextView txtMessage;
Button btnStart;
Animation animFadein;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fadein);
txtMessage = (TextView) findViewById(R.id.txtMessage);
btnStart = (Button) findViewById(R.id.btnStart);
// 加載動(dòng)畫
animFadein = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_in);
// 設(shè)置監(jiān)聽
animFadein.setAnimationListener(this);
// 按鈕
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
txtMessage.setVisibility(View.VISIBLE);
// 開始動(dòng)畫
txtMessage.startAnimation(animFadein);
}
});
}
@Override
public void onAnimationEnd(Animation animation) {
// 在動(dòng)畫結(jié)束后使用
// check for fade in animation
if (animation == animFadein) {
Toast.makeText(getApplicationContext(), "Animation Stopped",
Toast.LENGTH_SHORT).show();
}
}
@Override
public void onAnimationRepeat(Animation animation) {
//當(dāng)動(dòng)畫重復(fù)時(shí)使用
}
@Override
public void onAnimationStart(Animation animation) {
//當(dāng)動(dòng)畫開始使用
}
}
一些重要的XML屬性
重要的XML動(dòng)畫屬性
android:duration 動(dòng)畫持續(xù)時(shí)間,時(shí)間以毫秒為單位
android:startOffset 動(dòng)畫之間的時(shí)間間隔，從上次動(dòng)畫停多少時(shí)間開始執(zhí)行下個(gè)動(dòng)畫
android:interpolator 指定一個(gè)動(dòng)畫的插入器
android:fillAfter 當(dāng)設(shè)置為true ，該動(dòng)畫轉(zhuǎn)化在動(dòng)畫結(jié)束后被應(yīng)用
android:repeatMode 定義重復(fù)的行為
android:repeatCount 動(dòng)畫的重復(fù)次數(shù)
以下是一些基本的動(dòng)畫XML.
Fade In: 淡入
alpha是漸變透明度效果，值由0到1
fade_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true" >
<alpha
android:duration="1000"
android:fromAlpha="0.0"
android:interpolator="@android:anim/accelerate_interpolator"
android:toAlpha="1.0" />
</set>
Fade Out ： 淡出
以Fade In剛好相反，值由1到0.
fade_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true" >
<alpha
android:duration="1000"
android:fromAlpha="1.0"
android:interpolator="@android:anim/accelerate_interpolator"
android:toAlpha="0.0" />
</set>
Cross Fading: 交叉的淡入和淡出
同時(shí)使用Fade in和Fade out可以達(dá)到交叉的效果
public class CrossfadeActivity extends Activity implements AnimationListener {
TextView txtMessage1, txtMessage2;
Button btnStart;
Animation animFadeIn, animFadeOut;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_crossfade);
txtMessage1 = (TextView) findViewById(R.id.txtMessage1);
txtMessage2 = (TextView) findViewById(R.id.txtMessage2);
btnStart = (Button) findViewById(R.id.btnStart);
// load animations
animFadeIn = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_in);
animFadeOut = AnimationUtils.loadAnimation(getApplicationContext(),
R.anim.fade_out);
// set animation listeners
animFadeIn.setAnimationListener(this);
animFadeOut.setAnimationListener(this);
// button click event
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
txtMessage2.setVisibility(View.VISIBLE);
txtMessage2.startAnimation(animFadeIn);
txtMessage1.startAnimation(animFadeOut);
}
});
}
@Override
public void onAnimationEnd(Animation animation) {
if (animation == animFadeOut) {
txtMessage1.setVisibility(View.GONE);
}
if(animation == animFadeIn){
txtMessage2.setVisibility(View.VISIBLE);
}
}
@Override
public void onAnimationRepeat(Animation animation) {
// TODO Auto-generated method stub
}
@Override
public void onAnimationStart(Animation animation) {
// TODO Auto-generated method stub
}
}
BLink: 若隱若現(xiàn)，酷
blink.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha android:fromAlpha="0.0"
android:toAlpha="1.0"
android:interpolator="@android:anim/accelerate_interpolator"
android:duration="600"
android:repeatMode="reverse"
android:repeatCount="infinite"/>
</set>
Zoom In : 放大
zoom_in.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true" >
<scale
xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="1000"
android:fromXScale="1"
android:fromYScale="1"
android:pivotX="50%"
android:pivotY="50%"
android:toXScale="3"
android:toYScale="3" >
</scale>
</set>
Zoom Out: 縮小
zoom_out.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:fillAfter="true" >
<scale
xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="1000"
android:fromXScale="1.0"
android:fromYScale="1.0"
android:pivotX="50%"
android:pivotY="50%"
android:toXScale="0.5"
android:toYScale="0.5" >
</scale>
</set>
Rotate: 旋轉(zhuǎn)
rotate.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<rotate android:fromDegrees="0"
android:toDegrees="360"
android:pivotX="50%"
android:pivotY="50%"
android:duration="600"
android:repeatMode="restart"
android:repeatCount="infinite"
android:interpolator="@android:anim/cycle_interpolator"/>
</set>
還有幾個(gè)就不再列出，有興趣下源碼看。點(diǎn)擊下載
