android Animations 動畫效果(二)

Animations的第二種使用方法
1在res文件夾下新建一個anim文件夾
2.創建xml文件,並首先加入set標簽,改標簽如下:

<set xmlns:android="https://schemas.android.com/apk/res/android"
android:interpolator=”@android:anim/accelerate_interpolator”>

3.在該標簽中加入rotate,alpha,scale或translate標簽

4.在代碼中使用AnimationUtils當中裝載xml文件,並生成Animation對象

下面是代碼

MainActivity.java

package com.yx.animations01;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.AnimationUtils;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {

private Button scaleButton=null;
private Button rotateButton=null;
private Button alphaButton=null;
private Button translateButton=null;
private ImageView imageView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

scaleButton = (Button) findViewById(R.id.scaleButton);
scaleButton.setOnClickListener(new scaleButtonListener());

rotateButton = (Button) findViewById(R.id.rotateButton);
rotateButton.setOnClickListener(new rotateButtonListener());

alphaButton = (Button) findViewById(R.id.alphaButton);
alphaButton.setOnClickListener(new alphaButtonListener());

translateButton = (Button) findViewById(R.id.translateButton);
translateButton.setOnClickListener(new translateButtonListener());

imageView = (ImageView) findViewById(R.id.imageViewId);
}

class scaleButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.scale);
imageView.startAnimation(animation);
}
}

class rotateButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.rotate);
imageView.startAnimation(animation);
}
}

//淡入淡出
class alphaButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
//使用AnimationUtils裝載動畫設置文件
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.alpha);
imageView.startAnimation(animation);
}
}

class translateButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate);
imageView.startAnimation(animation);
}
}

}

下面分別是四個xml

alpha.xml

<set xmlns:android="https://schemas.android.com/apk/res/android"
android:interpolator=”@android:anim/accelerate_interpolator”>

android:toAlpha=”0.0″
android:startOffset=”500″
android:duration=”500″>

rotate.xml

<set xmlns:android="https://schemas.android.com/apk/res/android"
android:interpolator=”@android:anim/accelerate_interpolator”>
<rotate android:fromDegrees="0"
android:toDegrees=”+350″
android:pivotX=”50%”
android:pivotY=”50%”
android:duration=”3000″>
<!–
android:pivotX的值有三種設置方法
android:pivotX=”50″這種方法使用絕對定位
android:pivotX=”50%”這種方法為相對控件本身的定位
android:pivotX=”50%p”這種方法相對於控件的父控件定位
–>

scale.xml

<set xmlns:android="https://schemas.android.com/apk/res/android"
android:interpolator=”@android:anim/accelerate_interpolator”>
<scale
android:fromXScale=”1.0″
android:toXScale=”0.0″
android:fromYScale=”1.0″
android:toYScale=”0.0″
android:pivotX=”50%”
android:pivotY=”50%”
android:duration=”2000″
>

translate.xml

<set xmlns:android="https://schemas.android.com/apk/res/android"
android:interpolator=”@android:anim/accelerate_interpolator”>
<translate android:fromXDelta="50%"
android:toXDelta=”100%”
android:fromYDelta=”0%”
android:toYDelta=”100%”
android:duration=”2000″
/>

註意xml文件的放置位置

發佈留言