怎么实现Android TV 3D卡片无限循环效果

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##思路

自定义View + 属性动画ObjectAnimator
按键事件特殊处理。

##实现方式

1、ObjectAnimator属性动画的知识准备。
2、父不居中自定义ScheduleView，View2, View3

其中android:layout_gravity="center_horizontal"，使卡片在界面的正中间，其余两张的卡片也是如此，达到3个View的起始位置一直，这样方便之后的动画旋转。

2.添加自定义ScheduleView

public class ScheduleView extends BasePhoneView {    private static final String TAG = "CallFragment";    private static final boolean DEBUG = true;    private Context mContext;    private View mRootView;    private FrameLayout mMainView;    private ScheduleContract.View mView;    private ScheduleContract.Presenter mPresenter;    public ScheduleView(Context context) {        super(context);        this.mContext = context;        initView();    }    public ScheduleView(Context context, AttributeSet attrs) {        super(context, attrs);        this.mContext = context;        initView();    }    public ScheduleView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        this.mContext = context;        initView();    }    private void initView() {        findView();        initData();    }    private void findView() {        mRootView = LayoutInflater.from(mContext).inflate(R.layout.fragment_schedule, this);        mMainView = (FrameLayout) mRootView.findViewById(R.id.schedule_contains);        mMainView.setVisibility(View.VISIBLE);    }    private void initData() {        mMainView.removeAllViews();        mView = ScheduleContractFactory.createScheduleView(mContext);        mMainView.addView((View) mView);        mPresenter = ScheduleContractFactory.createSchedulePresenter(mContext, mView);        mPresenter.onCreate();        //这里只是使用mvp的形式添加view.    }    @Override    public void clearAllFocus() {    //清除所有的焦点        if (mView != null) {            mView.clearAllFocus();        }    }    @Override    public void requestFirstFocus() {    //第一个控件强行指定焦点        if (mView != null) {            mView.requestFirstFocus();        }    }    @Override    public void updateListData() {    //更新列表显示        if (mPresenter != null) {            mPresenter.reloadConferenceList();        }    }}

其中fragment_schedule.xml中只有一个简单的FrameLayout. View2 和View3类似。

3. 动画Util

(1) 设置3个卡片的初始位置

public final static float RUN_Y = 22.0f;public final static float RUN_LARGE_Y = 24.0f;public final static float RUN_Y_NEGATIVE = -22.0f;public final static float RUN_LARGE_Y_NEGATIVE = -24.0f;public final static float RUN_X = 1235.0f;public final static float RUN_X_NEGATIVE = -1235.0f;public final static float RUN_LARGE_X = 1366.0f;public final static float RUN_LARGE_X_NEGATIVE = -1366.0f;public void initLeftAnimator(View leftView) {        leftView.setTranslationX(RUN_X_NEGATIVE);//离屏幕中心偏移距离        leftView.setRotationY(RUN_Y);//旋转角度        leftView.setAlpha(LEFT_RIGHT_ALPHA);//设置透明度    }    public void initRightAnimator(View rightView) {        rightView.setTranslationX(RUN_X);//离屏幕中心偏移距离        rightView.setRotationY(RUN_Y_NEGATIVE);//旋转角度        rightView.setAlpha(LEFT_RIGHT_ALPHA);//设置透明度    }    public void initMidAnimator(View midView) {        //由于初始位置在xml中设定是在正中间，这里就不重新设置偏移量        midView.setAlpha(MIDDLE_ALPHA);    }public void midToLeftAnimator(final View runView, boolean anim) {        ObjectAnimator animatorX = ObjectAnimator.ofFloat(runView, "translationX", 0, RUN_X_NEGATIVE); //中间的起始位置未0        ObjectAnimator animatorZ = ObjectAnimator.ofFloat(runView, "rotationY", 0, RUN_Y);        ObjectAnimator animator3 = ObjectAnimator.ofFloat(runView, "alpha", MIDDLE_ALPHA, LEFT_RIGHT_ALPHA);        mMidToLeftAnimator = new AnimatorSet();        mMidToLeftAnimator.play(animatorX).with(animatorZ).with(animator3);        //anim设置是否需要动画执行时间        if (anim) {            mMidToLeftAnimator.setDuration(DURATION);        } else {            mMidToLeftAnimator.setDuration(0);        }        mMidToLeftAnimator.addListener(new Animator.AnimatorListener() {            @Override            public void onAnimationStart(Animator animation) {                mIsScrolling = true;            }            @Override            public void onAnimationEnd(Animator animation) {                //mIsScrolling来判断动画是否完成，来控制下一次动画是否需要执行                mIsScrolling = false;            }            @Override            public void onAnimationCancel(Animator animation) {            }            @Override            public void onAnimationRepeat(Animator animation) {            }        });        mMidToLeftAnimator.start();    }    public void midToRightAnimator(final View runView, boolean anim) {        ObjectAnimator animatorX = ObjectAnimator.ofFloat(runView, "translationX", 0, RUN_X);        ObjectAnimator animatorZ = ObjectAnimator.ofFloat(runView, "rotationY", 0, RUN_Y_NEGATIVE);        ObjectAnimator animator3 = ObjectAnimator.ofFloat(runView, "alpha", MIDDLE_ALPHA, LEFT_RIGHT_ALPHA);        mMidToRightAnimator = new AnimatorSet();        mMidToRightAnimator.play(animatorX).with(animatorZ).with(animator3);        if (anim) {            mMidToRightAnimator.setDuration(DURATION);        } else {            mMidToRightAnimator.setDuration(0);        }        mMidToRightAnimator.addListener(new Animator.AnimatorListener() {            @Override            public void onAnimationStart(Animator animation) {                mIsScrolling = true;            }            @Override            public void onAnimationEnd(Animator animation) {                mIsScrolling = false;            }            @Override            public void onAnimationCancel(Animator animation) {            }            @Override            public void onAnimationRepeat(Animator animation) {            }        });        mMidToRightAnimator.start();    }    public void rightToMidAnimator(final View runView, boolean anim) {        ObjectAnimator animatorX = ObjectAnimator.ofFloat(runView, "translationX", RUN_X, 0);        ObjectAnimator animatorZ = ObjectAnimator.ofFloat(runView, "rotationY", RUN_Y_NEGATIVE, 0);        ObjectAnimator animator3 = ObjectAnimator.ofFloat(runView, "alpha", LEFT_RIGHT_ALPHA, MIDDLE_ALPHA);        mRightToMidAnimator = new AnimatorSet();        mRightToMidAnimator.play(animatorX).with(animatorZ).with(animator3);        if (anim) {            mRightToMidAnimator.setDuration(DURATION);        } else {            mRightToMidAnimator.setDuration(0);        }        mRightToMidAnimator.addListener(new Animator.AnimatorListener() {            @Override            public void onAnimationStart(Animator animation) {                mIsScrolling = true;            }            @Override            public void onAnimationEnd(Animator animation) {                mIsScrolling = false;            }            @Override            public void onAnimationCancel(Animator animation) {            }            @Override            public void onAnimationRepeat(Animator animation) {            }        });        mRightToMidAnimator.start();    }    public void leftToMidAnimator(final View runView, boolean anim) {        ObjectAnimator animatorX = ObjectAnimator.ofFloat(runView, "translationX", RUN_X_NEGATIVE, 0);        ObjectAnimator animatorZ = ObjectAnimator.ofFloat(runView, "rotationY", RUN_Y, 0);        ObjectAnimator animator3 = ObjectAnimator.ofFloat(runView, "alpha", LEFT_RIGHT_ALPHA, MIDDLE_ALPHA);        mLeftToMidAnimator = new AnimatorSet();        mLeftToMidAnimator.play(animatorX).with(animatorZ).with(animator3);        if (anim) {            mLeftToMidAnimator.setDuration(DURATION);        } else {            mLeftToMidAnimator.setDuration(0);        }        mLeftToMidAnimator.addListener(new Animator.AnimatorListener() {            @Override            public void onAnimationStart(Animator animation) {                mIsScrolling = true;            }            @Override            public void onAnimationEnd(Animator animation) {                mIsScrolling = false;            }            @Override            public void onAnimationCancel(Animator animation) {            }            @Override            public void onAnimationRepeat(Animator animation) {            }        });        mLeftToMidAnimator.start();    }    public void rightToLeftAnimator(View runView, boolean anim) {        ObjectAnimator animator1 = ObjectAnimator.ofFloat(runView, "translationX", RUN_X, RUN_LARGE_X);        ObjectAnimator animator2 = ObjectAnimator.ofFloat(runView, "rotationY", RUN_Y_NEGATIVE, RUN_LARGE_Y_NEGATIVE);        ObjectAnimator animator3 = ObjectAnimator.ofFloat(runView, "alpha", LEFT_RIGHT_ALPHA, 0.0f);        //继续往右偏移        ObjectAnimator animator4 = ObjectAnimator.ofFloat(runView, "translationX", RUN_LARGE_X, RUN_X_NEGATIVE);        ObjectAnimator animator5 = ObjectAnimator.ofFloat(runView, "rotationY", RUN_LARGE_Y_NEGATIVE, RUN_LARGE_Y);        //中途隐藏不显示        ObjectAnimator animator6 = ObjectAnimator.ofFloat(runView, "alpha", 0.0f, 0.0f);        ObjectAnimator animator7 = ObjectAnimator.ofFloat(runView, "translationX", RUN_X_NEGATIVE, RUN_X_NEGATIVE);        //往左偏移显示在左边位置        ObjectAnimator animator8 = ObjectAnimator.ofFloat(runView, "rotationY", RUN_LARGE_Y, RUN_Y);        ObjectAnimator animator9 = ObjectAnimator.ofFloat(runView, "alpha", LEFT_RIGHT_ALPHA, LEFT_RIGHT_ALPHA);        //给分段动画设置时间        if (anim) {            animator1.setDuration(170);            animator4.setDuration(60);            animator7.setDuration(170);        } else {            animator1.setDuration(0);            animator4.setDuration(0);            animator7.setDuration(0);        }//with:同时执行，after（动画1）:在动画1之后执行，befor(动画1)：在动画1之前执行。//请注意以下的after(animator1)。表示动画4.5.6在动画1,2,3执行完毕之后同时执行        mRightToLeftAnimator = new AnimatorSet();        mRightToLeftAnimator.play(animator1).with(animator2).with(animator3);        mRightToLeftAnimator.play(animator4).with(animator5).with(animator6).after(animator1);        mRightToLeftAnimator.play(animator7).with(animator8).with(animator9).after(animator4);        mRightToLeftAnimator.addListener(new Animator.AnimatorListener() {            @Override            public void onAnimationStart(Animator animation) {                mIsScrolling = true;            }            @Override            public void onAnimationEnd(Animator animation) {                //mIsScrolling = false;            }            @Override            public void onAnimationCancel(Animator animation) {            }            @Override            public void onAnimationRepeat(Animator animation) {            }        });        mRightToLeftAnimator.start();    }    public void leftToRightAnimator(View runView, boolean anim) {        ObjectAnimator animator1 = ObjectAnimator.ofFloat(runView, "translationX", RUN_X_NEGATIVE, RUN_LARGE_X_NEGATIVE);        ObjectAnimator animator2 = ObjectAnimator.ofFloat(runView, "rotationY", RUN_Y, RUN_LARGE_Y);        ObjectAnimator animator3 = ObjectAnimator.ofFloat(runView, "alpha", LEFT_RIGHT_ALPHA, 0.0f);        ObjectAnimator animator4 = ObjectAnimator.ofFloat(runView, "translationX", RUN_LARGE_X_NEGATIVE, RUN_X);        ObjectAnimator animator5 = ObjectAnimator.ofFloat(runView, "rotationY", RUN_LARGE_Y, RUN_LARGE_Y_NEGATIVE);        ObjectAnimator animator6 = ObjectAnimator.ofFloat(runView, "alpha", 0.0f, 0.0f);        ObjectAnimator animator7 = ObjectAnimator.ofFloat(runView, "translationX", RUN_X, RUN_X);        ObjectAnimator animator8 = ObjectAnimator.ofFloat(runView, "rotationY", RUN_LARGE_Y_NEGATIVE, RUN_Y_NEGATIVE);        ObjectAnimator animator9 = ObjectAnimator.ofFloat(runView, "alpha", LEFT_RIGHT_ALPHA, LEFT_RIGHT_ALPHA);        if (anim) {            animator1.setDuration(170);            animator4.setDuration(60);            animator7.setDuration(170);        } else {            animator1.setDuration(0);            animator4.setDuration(0);            animator7.setDuration(0);        }        mLeftToRightAnimator = new AnimatorSet();        mLeftToRightAnimator.play(animator1).with(animator2).with(animator3);        mLeftToRightAnimator.play(animator4).with(animator5).with(animator6).after(animator1);        mLeftToRightAnimator.play(animator7).with(animator8).with(animator9).after(animator4);        mLeftToRightAnimator.addListener(new Animator.AnimatorListener() {            @Override            public void onAnimationStart(Animator animation) {                mIsScrolling = true;            }            @Override            public void onAnimationEnd(Animator animation) {                //mIsScrolling = false;            }            @Override            public void onAnimationCancel(Animator animation) {            }            @Override            public void onAnimationRepeat(Animator animation) {            }        });        mLeftToRightAnimator.start();}

好了，基本的动画效果就是这些了，其他细节就不贴代码了。

4. ScheduleView添加的子View焦点处理

@Override    public void clearAllFocus() {        mConfListView.clearFocus();        mLoginBtn.clearFocus();        updateAllFocus(false);        updateAllClickable(false);    }    @Override    public void requestFirstFocus() {        updateAllFocus(true);        updateAllClickable(true);        if (mPresenter.hasLogin()) {            mConfListView.requestFocus();        } else {            mLoginBtn.requestFocus();        }    }    private void updateAllFocus(boolean focus) {        mConfListView.setFocusable(focus);        mLoginBtn.setFocusable(focus);    }    private void updateAllClickable(boolean enabled) {        mConfListView.setEnabled(enabled);        mLoginBtn.setFocusable(enabled);    }

当ScheduleView偏离中间位置时，需要清楚当前界面所有的焦点并使其不能点击。
当ScheduleView旋转到中间的时候需要重新使其获取到焦点让其能够点击。

左右旋转控制

@Override    public boolean dispatchKeyEvent(KeyEvent event) {        int keyCode = event.getKeyCode();        int action = event.getAction();        Log.d(TAG, "keyCode v = " + keyCode);        switch (keyCode) {            case KeyEvent.KEYCODE_DPAD_LEFT:                if (action == KeyEvent.ACTION_UP) {                    if (mCurrentItem == ITEMTAG.CALL && mCallView.isLastFocus(0)) {                        runLeftControl(true);                    } else if (mCurrentItem == ITEMTAG.CONTACTS && mContactsView.isLastFocus(0)) {                        runLeftControl(true);                    } else if (mCurrentItem == ITEMTAG.SCHEDULE) {                        runLeftControl(true);                    }                } else if (action == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {                    if (mCurrentItem == ITEMTAG.CALL) {                        mCallView.saveLastFocusId();                    }                }                break;            case KeyEvent.KEYCODE_DPAD_RIGHT:                if (action == KeyEvent.ACTION_UP) {                    if (mCurrentItem == ITEMTAG.CALL && mCallView.isLastFocus(1)) {                        runRightControl(true);                    } else if (mCurrentItem == ITEMTAG.CONTACTS && mContactsView.isLastFocus(1)) {                        runRightControl(true);                    } else if (mCurrentItem == ITEMTAG.SCHEDULE) {                        runRightControl(true);                    }                } else if (action == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {                    if (mCurrentItem == ITEMTAG.CALL) {                        mCallView.saveLastFocusId();                    }                }                break;            case KeyEvent.KEYCODE_MENU:                if (action == KeyEvent.ACTION_UP) {                    AnimatorManager.getInstance().shakeView(mTitleMenuView, 0.5f);                }                break;        }        return super.dispatchKeyEvent(event);    }

（1）处理方式是在监听遥控器的左右按键的UP事件，使其避免在Down时候处理旋转太快系统ANR
（2）如果界面中含有EditView，如果其在界面的边缘，那么左右按键就会和EditText有字符的时候就会对是否是最边沿的判断isLastFocus(0)产生影响。解决方案：

在最左边go_left_btn和最右边go_right_btn添加隐形的btn,让其获取焦点，在左右按键UP的时候，焦点如果在两个按钮上就实行左右跳转，否则停留在当前界面。

感谢各位的阅读，以上就是"怎么实现Android TV 3D卡片无限循环效果"的内容了，经过本文的学习后，相信大家对怎么实现Android TV 3D卡片无限循环效果这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是，小编将为大家推送更多相关知识点的文章，欢迎关注！