Android实现dialog的3D翻转

摘要：本文实现了中的翻转效果。看着确实不错，然而拿下来放慢翻转速度后发现，不是我想要的。效果如下这个是通过来切换实现的，可以看到区别是翻转时候貌似会变大，其实没用，只是翻转后的视觉问题。

本文实现了Android中dialog的3D翻转效果。这里通过一个简单的应用场景记录下。

起初自己的思路是Activity进行界面跳转实现旋转效果，网上看了很多，写下来发现效果不对。之后又看到Google上面的Card Flid Animation效果是这样的。

看着确实不错，然而拿下来demo放慢翻转速度后发现，不是我想要的。但是跟我看到的一个app里面的效果一样
然后想改成dialog试试效果，发现更是不行了。

Card Flid Animation效果如下：
这个是通过Activity来切换Fragment实现的，可以看到区别是翻转时候貌似会变大，其实没用，只是翻转后的视觉问题。

听说openGl比较麻烦，并且没有用过。然后就搜了下Rotate3DAnimaitons。

搜到了这篇文章
http://blog.csdn.net/growing_...
所以这篇文章里的实现方法不是我的原创，是参考人家的。在这里感谢这位大神。
不过他这个是activity里的，我就想要一个dialog效果，因为电脑上TIM的打开红包这个3D效果看着不错，其实大同小异，就拿过来改成Dialog。
对于Rotate3DAnimaitons这篇文章已经很详细了，有需要的可以参考下。

简单加了两行注释

/**
 * An animation that rotates the view on the Y axis between two specified angles.
 * This animation also adds a translation on the Z axis (depth) to improve the effect.
 */
public class Rotate3dAnimation extends Animation {
    private final float mFromDegrees;
    private final float mToDegrees;
    private final float mCenterX;
    private final float mCenterY;
    private final float mDepthZ;
    private final boolean mReverse;
    private Camera mCamera;

    /**
     * Creates a new 3D rotation on the Y axis. The rotation is defined by its
     * start angle and its end angle. Both angles are in degrees. The rotation
     * is performed around a center point on the 2D space, definied by a pair
     * of X and Y coordinates, called centerX and centerY. When the animation
     * starts, a translation on the Z axis (depth) is performed. The length
     * of the translation can be specified, as well as whether the translation
     * should be reversed in time.
     *
     * @param fromDegrees the start angle of the 3D rotation //起始角度
     * @param toDegrees the end angle of the 3D rotation //结束角度
     * @param centerX the X center of the 3D rotation //x中轴线
     * @param centerY the Y center of the 3D rotation //y中轴线
     * @param reverse true if the translation should be reversed, false otherwise//是否反转
     */
    public Rotate3dAnimation(float fromDegrees, float toDegrees,
            float centerX, float centerY, float depthZ, boolean reverse) {
        mFromDegrees = fromDegrees;
        mToDegrees = toDegrees;
        mCenterX = centerX;
        mCenterY = centerY;
        mDepthZ = depthZ;//Z轴移动的距离，这个来影响视觉效果，可以解决flip animation那个给人看似放大的效果
        mReverse = reverse;
    }

    @Override
    public void initialize(int width, int height, int parentWidth, int parentHeight) {
        super.initialize(width, height, parentWidth, parentHeight);
        mCamera = new Camera();
    }

    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t) {
        final float fromDegrees = mFromDegrees;
        float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);

        final float centerX = mCenterX;
        final float centerY = mCenterY;
        final Camera camera = mCamera;

        final Matrix matrix = t.getMatrix();

        Log.i("interpolatedTime", interpolatedTime+"");
        camera.save();
        if (mReverse) {
            camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime);
        } else {
            camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime));
        }
        camera.rotateY(degrees);
        camera.getMatrix(matrix);
        camera.restore();

        matrix.preTranslate(-centerX, -centerY);
        matrix.postTranslate(centerX, centerY);
    }
}

说明：动画部分的代码是拿的搜的的那篇文章的

public class MyDialog extends Dialog {

    @BindView(R.id.et_user_name)
    EditText etUserName;
    @BindView(R.id.et_password)
    EditText etPassword;
    @BindView(R.id.cb_auto_login)
    CheckBox cbAutoLogin;
    @BindView(R.id.tv_forget_pwd)
    TextView tvForgetPwd;
    @BindView(R.id.ll_content)
    LinearLayout llContent;
    @BindView(R.id.et_email)
    EditText etEmail;
    @BindView(R.id.btn_back)
    Button btnBack;
    @BindView(R.id.container)
    RelativeLayout container;
    private Context context;

    @BindView(R.id.ll_register)
    LinearLayout llRegister;


    //接口回调传递参数
    private OnClickListenerInterface mListener;
    private View view;
//
    private String strContent;


    private int centerX;
    private int centerY;
    private int depthZ = 700;//修改此处可以改变距离来达到你满意的效果
    private int duration = 300;//动画时间
    private Rotate3dAnimation openAnimation;
    private Rotate3dAnimation closeAnimation;

    private boolean isOpen = false;

    public interface OnClickListenerInterface {

        /**
         * 确认,
         */
        void doConfirm();

        /**
         * 取消
         */
//        public void doCancel();
    }

    public MyDialog(Context context) {
        super(context);
        this.context = context;
    }

    public MyDialog(Context context, String content) {
        super(context);
        this.context = context;
        this.strContent = content;

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //去掉系统的黑色矩形边框
        getWindow().setBackgroundDrawableResource(android.R.color.transparent);
        requestWindowFeature(Window.FEATURE_NO_TITLE);

        init();
    }

    public void init() {
        LayoutInflater inflater = LayoutInflater.from(context);
        view = inflater.inflate(R.layout.dialog_my, null);
        setContentView(view);
        ButterKnife.bind(this);
        etPassword.setTypeface(Typeface.DEFAULT);
        etPassword.setTransformationMethod(new PasswordTransformationMethod());
        tvForgetPwd.setOnClickListener(new OnWidgetClickListener());
        btnBack.setOnClickListener(new OnWidgetClickListener());
        Window dialogWindow = getWindow();
        WindowManager.LayoutParams lp = dialogWindow.getAttributes();
        DisplayMetrics d = context.getResources().getDisplayMetrics(); // 获取屏幕宽、高用
        lp.width = (int) (d.widthPixels * 0.8); // 宽度设置为屏幕的0.8
        lp.height = (int) (d.heightPixels * 0.6); // 高度设置为屏幕的0.6
        dialogWindow.setAttributes(lp);
        setCanceledOnTouchOutside(false);
        setCancelable(true);
    }

    public void setClicklistener(OnClickListenerInterface clickListenerInterface) {
        this.mListener = clickListenerInterface;
    }

    private class OnWidgetClickListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {

            int id = v.getId();
            switch (id) {
                case R.id.tv_forget_pwd:
                    startAnimation();
                    break;
                case R.id.btn_back:
                    startAnimation();
                    break;
            }
        }
    }

    private void startAnimation() {
        //接口回调传递参数
        centerX = container.getWidth() / 2;
        centerY = container.getHeight() / 2;
        if (openAnimation == null) {
            initOpenAnim();
            initCloseAnim();
        }

        //用作判断当前点击事件发生时动画是否正在执行
        if (openAnimation.hasStarted() && !openAnimation.hasEnded()) {
            return;
        }
        if (closeAnimation.hasStarted() && !closeAnimation.hasEnded()) {
            return;
        }

        //判断动画执行
        if (isOpen) {

            container.startAnimation(openAnimation);

        } else {

            container.startAnimation(closeAnimation);

        }
        isOpen = !isOpen;
    }

    /**
     *注意旋转角度
     */
    private void initOpenAnim() {
        //从0到90度，顺时针旋转视图，此时reverse参数为true，达到90度时动画结束时视图变得不可见，
        openAnimation = new Rotate3dAnimation(0, 90, centerX, centerY, depthZ, true);
        openAnimation.setDuration(duration);
        openAnimation.setFillAfter(true);
        openAnimation.setInterpolator(new AccelerateInterpolator());
        openAnimation.setAnimationListener(new Animation.AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                llRegister.setVisibility(View.GONE);
                llContent.setVisibility(View.VISIBLE);
                //从270到360度，顺时针旋转视图，此时reverse参数为false，达到360度动画结束时视图变得可见
                Rotate3dAnimation rotateAnimation = new Rotate3dAnimation(270, 360, centerX, centerY, depthZ, false);
                rotateAnimation.setDuration(duration);
                rotateAnimation.setFillAfter(true);
                rotateAnimation.setInterpolator(new DecelerateInterpolator());
                container.startAnimation(rotateAnimation);
            }
        });
    }

   
    private void initCloseAnim() {
        closeAnimation = new Rotate3dAnimation(360, 270, centerX, centerY, depthZ, true);
        closeAnimation.setDuration(duration);
        closeAnimation.setFillAfter(true);
        closeAnimation.setInterpolator(new AccelerateInterpolator());
        closeAnimation.setAnimationListener(new Animation.AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                llRegister.setVisibility(View.VISIBLE);
                llContent.setVisibility(View.GONE);
                Rotate3dAnimation rotateAnimation = new Rotate3dAnimation(90, 0, centerX, centerY, depthZ, false);
                rotateAnimation.setDuration(duration);
                rotateAnimation.setFillAfter(true);
                rotateAnimation.setInterpolator(new DecelerateInterpolator());
                container.startAnimation(rotateAnimation);
            }
        });
    }
}