在关闭前更改DialogFragment的进入/退出过渡 [英] Change DialogFragment enter/exit transition at just before dismissing

问题描述

我有一个DialogFragment，并在onActivityCreated方法中为进入/退出设置了动画，如下所示:

I have a DialogFragment and I set animation for enter/exit in the onActivityCreated method as below:

  @Override
    public void onActivityCreated(Bundle arg0) {
        super.onActivityCreated(arg0);
        getDialog().getWindow()
                .getAttributes().windowAnimations = R.style.DialogAnimation;
    }

我的DialogAnimation样式文件如下:

<style name="DialogAnimation">
        <item name="android:windowEnterAnimation">@android:anim/fade_in</item>
        <item name="android:windowExitAnimation">@android:anim/fade_out</item>
    </style>

这现在对我有用...

This works for me now...

现在我的问题是我希望有两种不同的退出动画，一种用于单击确定"按钮时，另一种用于取消按钮.所以我所做的是我在撤职前尝试更改过渡，但没有成功.

Now my problem is i want to have two different exit animation one for when the "OK" button is clicked and one for the cancel button. So what I did was I tried changing the transition just before dismissing but it didn't work.

关于如何实现它的任何解决方案?

Any solution on how it can be achieved?

这是我尝试过的:

  @Override
    public void onClick(View v) {
        getDialog().getWindow()
                .getAttributes().windowAnimations = R.style.DialogAnimation2;
        this.dismiss();
    }

推荐答案

您可以在DialogFragment中完成它，而无需更改

You can do it inside your DialogFragment, without changing

getDialog().getWindow()
            .getAttributes().windowAnimations

您应为装饰视图"动画，在onStart和onClick中.

You should animate "decor view" in onStart and onClick.

这是代码片段:

首先创建对话框

@Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return new AlertDialog.Builder(getActivity())
                .setTitle("Hello from animated dialog :)")
                .setNegativeButton("Cancel",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                //we have to add button here and then override it's click in onStart
                            }
                        }
                )
                .setCancelable(false)
                .create();
    }

然后覆盖onStart方法

@Override
    public void onStart() {
        super.onStart();

        AlertDialog dialog = (AlertDialog)getDialog();

        final View decorView = getDialog()
                .getWindow()
                .getDecorView();

        ObjectAnimator scaleDown = ObjectAnimator.ofPropertyValuesHolder(decorView,
                PropertyValuesHolder.ofFloat("scaleX", 0.0f, 1.0f),
                PropertyValuesHolder.ofFloat("scaleY", 0.0f, 1.0f),
                PropertyValuesHolder.ofFloat("alpha", 0.0f, 1.0f));
        scaleDown.setDuration(2000);
        scaleDown.start();


        Button positiveButton = dialog.getButton(Dialog.BUTTON_NEGATIVE);
        positiveButton.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                final View decorView = getDialog()
                        .getWindow()
                        .getDecorView();

                ObjectAnimator scaleDown = ObjectAnimator.ofPropertyValuesHolder(decorView,
                        PropertyValuesHolder.ofFloat("scaleX", 1.0f, 0.0f),
                        PropertyValuesHolder.ofFloat("scaleY", 1.0f, 0.0f),
                        PropertyValuesHolder.ofFloat("alpha", 1.0f, 0.0f));
                scaleDown.addListener(new Animator.AnimatorListener() {
                    @Override
                    public void onAnimationEnd(Animator animation) {
                        dismiss();
                    }

                    @Override
                    public void onAnimationStart(Animator animation) {
                    }
                    @Override
                    public void onAnimationCancel(Animator animation) {
                    }
                    @Override
                    public void onAnimationRepeat(Animator animation) {
                    }
                });
                scaleDown.setDuration(2000);
                scaleDown.start();
            }
        });
    }

这是结果动画

如果您从我的代码中删除比例属性，则只会获得alpha动画.正是您想要的.

And if you remove scale properties from my code you will get only alpha animation. Exactly as you wanted.

删除此:

PropertyValuesHolder.ofFloat("scaleX", 1.0f, 0.0f),
PropertyValuesHolder.ofFloat("scaleY", 1.0f, 0.0f),

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