dependencies {
compile files('libs/nineoldandroids-2.4.0.jar')
}

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/switch_anim_root"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:layout_width="42dp"
android:layout_height="25dp"
android:background="@drawable/switch_container" />
<ImageView
android:id="@+id/switch_anim_circle_point"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginLeft="2.5dp"
android:layout_marginTop="2.5dp"
android:background="@drawable/switch_off_circle_point" />
</FrameLayout>
<ImageView
android:id="@+id/finger_switch"
android:layout_width="34dp"
android:layout_height="41dp"
android:layout_marginLeft="5dp"
android:layout_marginTop="25dp"
android:background="@drawable/finger_normal" />
</merge>

package com.androidanimation.animationview;
import android.content.Context;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.widget.FrameLayout;
import android.widget.ImageView;
import com.androidanimation.R;
import com.androidanimation.animations.BaseAnimatorListener;
import com.androidanimation.utils.ViewUtil;
import com.nineoldandroids.animation.Animator;
import com.nineoldandroids.animation.ObjectAnimator;
import com.nineoldandroids.view.ViewHelper;
/**
* Created by popfisher on 2016/9/3.
*/
public class SwitchOnAnimView extends FrameLayout {
private Handler mHandler = new Handler();
/** 开关中间的圆圈View */
private ImageView mCirclePtImgv;
/** 手指View */
private ImageView mFingerImgv;
/** 手指移动的距离 */
private float mFingerMoveDistance;
/** 开关中间的圆圈View需要移动的距离 */
private float mCirclePtMoveDistance;
private static final int FINGER_ANIM_DURATION = 300;
private static final int CIRCLE_PT_ANIM_DURATION = 500;
private boolean isStopAnim = false;
public SwitchOnAnimView(Context context) {
this(context, null);
}
public SwitchOnAnimView(Context context, AttributeSet attrs) {
super(context, attrs);
// 加载布局
LayoutInflater.from(context).inflate(R.layout.finger_switch_on_guide_layout, this, true);
initView();
}
private void initView() {
mCirclePtImgv = (ImageView) findViewById(R.id.switch_anim_circle_point);
mFingerImgv = (ImageView) findViewById(R.id.finger_switch);
// 下面两个距离要根据UI布局来确定
mFingerMoveDistance = ViewUtil.dp2px(getContext(), 20f);
mCirclePtMoveDistance = ViewUtil.dp2px(getContext(), 17.5f);
}
/**
* 启动动画
*/
public void startAnim() {
isStopAnim = false;
// 启动动画之前先恢复初始状态
ViewHelper.setTranslationX(mCirclePtImgv, 0);
mCirclePtImgv.setBackgroundResource(R.drawable.switch_off_circle_point);
mFingerImgv.setBackgroundResource(R.drawable.finger_normal);
startFingerUpAnim();
}
/**
* 停止动画
*/
public void stopAnim() {
isStopAnim = true;
}
/**
* 中间的圈点View平移动画
*/
private void startCirclePointAnim() {
if (mCirclePtImgv == null) {
return;
}
ObjectAnimator circlePtAnim = ObjectAnimator.ofFloat(mCirclePtImgv, "translationX", 0, mCirclePtMoveDistance);
circlePtAnim.setDuration(CIRCLE_PT_ANIM_DURATION);
circlePtAnim.start();
}
/**
* 手指向上移动动画
*/
private void startFingerUpAnim() {
ObjectAnimator fingerUpAnim = ObjectAnimator.ofFloat(mFingerImgv, "translationY", 0, -mFingerMoveDistance);
fingerUpAnim.setDuration(FINGER_ANIM_DURATION);
fingerUpAnim.addListener(new BaseAnimatorListener() {
@Override
public void onAnimationEnd(Animator animator) {
if (mFingerImgv == null || mHandler == null) {
return;
}
// 手指向上动画执行完成就设置手指View背景为点击状态的背景
mFingerImgv.setBackgroundResource(R.drawable.finger_click);
// 点击之后为了提现停顿一下的感觉，延迟200毫秒执行其他动画
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
if (mCirclePtImgv == null || mHandler == null) {
return;
}
// 将中间圆圈View背景设置为开关打开状态然后开始向右平移
mCirclePtImgv.setBackgroundResource(R.drawable.switch_on_circle_point);
startCirclePointAnim();
// 延迟100毫秒启动手指向下平移动画
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
// 手指向下移动开始时设置手指背景为正常的状态
if (mFingerImgv != null) {
mFingerImgv.setBackgroundResource(R.drawable.finger_normal);
}
startFingerDownAnim();
}
}, 100);
}
}, 200);
}
});
fingerUpAnim.start();
}
/**
* 手指向下移动动画
*/
private void startFingerDownAnim() {
if (mFingerImgv == null) {
return;
}
ObjectAnimator fingerDownAnim = ObjectAnimator.ofFloat(mFingerImgv, "translationY", -mFingerMoveDistance, 0);
fingerDownAnim.setDuration(FINGER_ANIM_DURATION);
fingerDownAnim.addListener(new BaseAnimatorListener() {
@Override
public void onAnimationEnd(Animator animator) {
// 手指向下移动动画完成，整个动画流程结束，重新开始下一次流程，循环执行动画，间隔1秒
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
if (isStopAnim) {
return;
}
startAnim();
}
}, 1000);
}
});
fingerDownAnim.start();
}
} 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/activity_animation_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<com.androidanimation.animationview.SwitchOnAnimView
android:id="@+id/switch_on_anim_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>

package com.androidanimation;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import com.androidanimation.animationview.SwitchOnAnimView;
public class FingerSwitchOnAnimActivity extends Activity {
private Handler mHandler = new Handler();
private SwitchOnAnimView mSwitchOnAnimView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_finger_switchon_anim);
mSwitchOnAnimView = (SwitchOnAnimView) findViewById(R.id.switch_on_anim_view);
}
@Override
protected void onResume() {
super.onResume();
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
mSwitchOnAnimView.startAnim();
}
}, 500);
}
@Override
protected void onPause() {
super.onPause();
mSwitchOnAnimView.stopAnim();
}
}