如何添加Activity的进出场动画

必须在 StartActivity() 或 finish() 之后立即调用overridePendingTransition方法

public static void actionStart(Activity activity, int id, int category) {
    Intent intent = new Intent(activity, QLibraryDetialActivity.class);
    intent.putExtra("id", id);
    intent.putExtra("category", category);
    activity.startActivity(intent);
    // 设置切换动画，从右边进入，左边退出； 
    // 两个activity切换，第一个activity从0位左移退出，第二个activity从100%位左移进入(下面参数1是第二个activity的动画)
    activity.overridePendingTransition(R.anim.slide_in_right, R.anim.slide_out_left);
}

动画xml slide_in_right：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromXDelta="100%p"
        android:toXDelta="0"/>
    <alpha
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromAlpha="1.0"
        android:toAlpha="1.0"/>
</set>

动画xml slide_out_left：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromXDelta="0"
        android:toXDelta="-100%p"/>
    <alpha
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromAlpha="1.0"
        android:toAlpha="1.0"/>
</set>

用在finish()后：

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    switch (keyCode){
        case KeyEvent.KEYCODE_BACK:
            myFinish();
            break;
    }
    return super.onKeyDown(keyCode, event);
}

private void myFinish() {
    finish();
    overridePendingTransition(R.anim.slide_in_left, R.anim.slide_out_right);
}

动画slide_in_left:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromXDelta="-100%p"
        android:toXDelta="0"/>
    <alpha
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromAlpha="1.0"
        android:toAlpha="1.0"/>
</set>

动画slide_out_right:

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromXDelta="0"
        android:toXDelta="100%p"/>
    <alpha
        android:duration="@android:integer/config_mediumAnimTime"
        android:fromAlpha="1.0"
        android:toAlpha="1.0"/>
</set>