編輯:關於Android編程
最近項目上用到了卡片的翻轉效果,大致研究了下,也參考了網上的一些Demo,簡單實現如下:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/card_main_container" android:layout_height="match_parent" android:layout_width="match_parent"> <include layout="@layout/activity_card_back"/> <include layout="@layout/activity_card_front"/> </FrameLayout>
可以看出,用到了兩個布局
activity_card_back.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/card_back_container" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginTop="@dimen/activity_vertical_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:layout_marginBottom="@dimen/activity_vertical_margin" android:background="@drawable/shape_card_back_bg" android:orientation="vertical"> <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:text="背面" android:textSize="30sp"/> </LinearLayout>
activity_card_front.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/card_font_container" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginLeft="@dimen/activity_horizontal_margin" android:layout_marginTop="@dimen/activity_vertical_margin" android:layout_marginRight="@dimen/activity_horizontal_margin" android:layout_marginBottom="@dimen/activity_vertical_margin" android:background="@drawable/shape_card_front_bg" android:orientation="vertical"> <TextView android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:text="正面" android:textSize="30sp"/> </LinearLayout>
附上自定義的圖片:
shape_card_back_bg.xml
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <corners android:radius="30dp"/> <solid android:color="@android:color/holo_red_light"/> </shape>
shape_card_front_bg.xml
<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android"> <corners android:radius="30dp"/> <solid android:color="@android:color/darker_gray"/> </shape>
主要的邏輯如下:
package com.jackie.flipanimationdemo; import android.animation.Animator; import android.animation.AnimatorInflater; import android.animation.AnimatorListenerAdapter; import android.animation.AnimatorSet; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.FrameLayout; import android.widget.LinearLayout; public class MainActivity extends AppCompatActivity implements View.OnClickListener { private FrameLayout mCardMainContainer; private LinearLayout mCardFontContainer, mCardBackContainer; private AnimatorSet mRightOutAnimatorSet, mLeftInAnimatorSet; private boolean mIsShowBack = false; //是否顯示背面 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); initEvent(); } private void initView() { mCardMainContainer = (FrameLayout) findViewById(R.id.card_main_container); mCardFontContainer = (LinearLayout) findViewById(R.id.card_font_container); mCardBackContainer = (LinearLayout) findViewById(R.id.card_back_container); setAnimators(); // 設置動畫 setCameraDistance(); // 設置鏡頭距離 } private void initEvent() { mCardMainContainer.setOnClickListener(this); } private void setAnimators() { mRightOutAnimatorSet = (AnimatorSet) AnimatorInflater.loadAnimator(this, R.animator.anim_right_out); mLeftInAnimatorSet = (AnimatorSet) AnimatorInflater.loadAnimator(this, R.animator.anim_left_in); // 設置點擊事件 mRightOutAnimatorSet.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animation) { super.onAnimationStart(animation); mCardMainContainer.setClickable(false); } }); mLeftInAnimatorSet.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); mCardMainContainer.setClickable(true); } }); } private void setCameraDistance() { int distance = 16000; float scale = getResources().getDisplayMetrics().density * distance; mCardFontContainer.setCameraDistance(scale); mCardBackContainer.setCameraDistance(scale); } private void flipCard() { if (!mIsShowBack) { // 正面朝上 mRightOutAnimatorSet.setTarget(mCardFontContainer); mLeftInAnimatorSet.setTarget(mCardBackContainer); mRightOutAnimatorSet.start(); mLeftInAnimatorSet.start(); mIsShowBack = true; } else { // 背面朝上 mRightOutAnimatorSet.setTarget(mCardBackContainer); mLeftInAnimatorSet.setTarget(mCardFontContainer); mRightOutAnimatorSet.start(); mLeftInAnimatorSet.start(); mIsShowBack = false; } } @Override public void onClick(View v) { switch (v.getId()) { case R.id.card_main_container: flipCard(); break; } } }
用到一些動畫的資源:
anim_left_in.xml
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <!--消失--> <objectAnimator android:duration="0" android:propertyName="alpha" android:valueFrom="1.0" android:valueTo="0.0"/> <!--旋轉--> <objectAnimator android:duration="@integer/anim_length" android:propertyName="rotationY" android:valueFrom="-180" android:valueTo="0"/> <!--出現--> <objectAnimator android:duration="0" android:propertyName="alpha" android:startOffset="@integer/anim_half_length" android:valueFrom="0.0" android:valueTo="1.0"/> </set>
anim_right_out.xml
<?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <!--旋轉--> <objectAnimator android:duration="@integer/anim_length" android:propertyName="rotationY" android:valueFrom="0" android:valueTo="180"/> <!--消失--> <objectAnimator android:duration="0" android:propertyName="alpha" android:startOffset="@integer/anim_half_length" android:valueFrom="1.0" android:valueTo="0.0"/> </set>
用到了屬性動畫,為了兼容性,別忘了如下配置:
效果圖如下:
效果圖:
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