活动导航:带有片段的popEnter和popExit的自定义动画 [英] Activity navigation: custom animation with popEnter and popExit like fragments

问题描述

使用以下代码可以更改动画的活动:

Changing activities with an animation is possible using the code below:

Bundle animation = ActivityOptions.makeCustomAnimation(App.getContext(), R.anim.enter_from_right, R.anim.exit_to_left).toBundle();
startActivity(intent, animation);

对于片段，您可以在FragmentTransaction上执行类似的操作:

For fragments you can do something similar on FragmentTransaction:

// ...
transaction.setCustomAnimations(R.anim.enter_from_right, R.anim.exit_to_left);
// ...

这有效！ 但我想在回退时有动画(从后堆栈弹出). 对于片段，您只需添加2个动画资源(popEnter和ampExit):

This works! But I'd like to have an animation when pressing back (pop from backstack). For fragments you simply add 2 anim resources (popEnter & popExit):

transaction.setCustomAnimations(R.anim.enter_from_right, R.anim.exit_to_left, R.anim.enter_from_left, R.anim.exit_to_right);

如何为活动创建相同的后动画"?

How can I create the same 'back-animation' for activities?

推荐答案

我发现了另一种虽然简单的方法，但似乎效果很好.活动的动画也可以使用 overridePendingTransition 进行，因此，当活动结束时，您只需使用该方法即可.

I've found a different though simple approach that seems to work quite well. Animations for activities can also be performed using overridePendingTransition, so when the activity finishes you'll simply use that method.

在BaseActivity中实现这些替代将是最有效的方法，该扩展将由您项目中的所有活动扩展.现在，您的所有活动都会自动包含退出动画和开始新活动时的动画:

It would be most effective to implement these overrides in a BaseActivity, which is extended by all activities in your project. Now all your activities will automatically include an exit animation and an animation when starting new activities:

public abstract class BaseActivity extends AppCompatActivity {

    @Override
    public void finish() {
        super.finish();
        onLeaveThisActivity();
    }

    protected void onLeaveThisActivity() {
        overridePendingTransition(R.anim.enter_from_left, R.anim.exit_to_right);
    }

    // It's cleaner to animate the start of new activities the same way.
    // Override startActivity(), and call *overridePendingTransition*
    // right after the super, so every single activity transaction will be animated:

    @Override
    public void startActivity(Intent intent) {
        super.startActivity(intent);
        onStartNewActivity();
    }

    @Override
    public void startActivity(Intent intent, Bundle options) {
        super.startActivity(intent, options);
        onStartNewActivity();
    }

    @Override
    public void startActivityForResult(Intent intent, int requestCode) {
        super.startActivityForResult(intent, requestCode);
        onStartNewActivity();
    }

    @Override
    public void startActivityForResult(Intent intent, int requestCode, Bundle options) {
        super.startActivityForResult(intent, requestCode, options);
        onStartNewActivity();
    }

    protected void onStartNewActivity() {
        overridePendingTransition(R.anim.enter_from_right, R.anim.exit_to_left);
    }
}

为进行全面介绍，我将包括4种动画资源:

To round things up, I'll include the 4 anim resources:

enter_from_right

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="500"
    android:fromXDelta="100%p"
    android:toXDelta="0%p"/>

exit_to_left

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="500"
    android:fromXDelta="0%p"
    android:toXDelta="-100%p"/>

enter_from_left

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="500"
    android:fromXDelta="-100%p"
    android:toXDelta="0%p"/>

exit_to_right

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="500"
    android:fromXDelta="0%p"
    android:toXDelta="100%p"/>

ps.您可能希望在开始/主要活动中排除退出动画；-)

ps. You'd probably like to exclude the exit-animation in your starting / main activity ;-)

public class MainMenuActivity extends BaseActivity {
    ....
    @Override
    protected void onLeaveThisActivity() {
        // Don't use an exit animation when leaving the main activity!
    }
}

EDIT 2019年10月24日:

EDIT Oct 24 2019:

从一个活动导航到下一个活动，并完成流程中的当前活动时，请注意，在导航实现之前，应先调用finish().如果以错误的顺序执行此操作，则onLeaveThisActivity将被称为AFTER onStartNewActivity，从而导致错误的动画.

When navigating from one activity to the next, AND finishing the current activity in the process, take note that finish() should be called BEFORE the navigation implementation. If this is done in the wrong order, onLeaveThisActivity will be called AFTER onStartNewActivity, resulting in the wrong animation.

这篇关于活动导航:带有片段的popEnter和popExit的自定义动画的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！