放大进入activity动画

res/anim/

<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha
    android:fromAlpha="0.0" android:toAlpha="1.0"
    android:duration="250" />
    <scale
        android:interpolator="@android:anim/accelerate_interpolator"
        android:fromXScale="0.0"
        android:toXScale="1.0"
        android:fromYScale="0.0"
        android:toYScale="1.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:startOffset="0"
        android:duration="250"
        />
</set>

@Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        overridePendingTransition(R.anim.main_fade_in,R.anim.main_fade_out);
    }

onCreate(){