Activity从底部向上半透明弹出效果实现

修改Activity的风格继承自Dialog

<style name="AppThemeDialogIsTranslucent" parent="Theme.AppCompat.Dialog">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
    <item name="android:windowActionBar">false</item>
    <item name="android:windowFrame">@null</item>
    <!--边框-->
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowNoTitle">true</item>
    <!--是否启用标题栏-->
    <item name="android:background">@null</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:backgroundDimEnabled">true</item>
    <item name="android:windowFullscreen">true</item>
</style>

设置Activity宽高

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //窗口对齐屏幕宽度
        Window win = this.getWindow();
        WindowManager.LayoutParams lp = win.getAttributes();
        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
        win.setAttributes(lp);
    }

如果想让Activity从下往上弹出，可以把样式文件增加一条

<item name="android:windowAnimationStyle">@style/animationUp</item>

其中animationUp为

<style name="animationUp" parent="android:Animation">
<item name="android:activityOpenEnterAnimation">@anim/pop_enter_anim</item>
<item name="android:activityCloseExitAnimation">@anim/pop_exit_anim</item>
</style>

pop_enter_anim

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="500"
        android:fromYDelta="100%p"
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:toYDelta="0"
        />
    <alpha
        android:duration="500"
        android:fromAlpha="0.0"
        android:toAlpha="1.0"
        />
</set>

pop_exit_anim

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="500"
        android:fromYDelta="0"
        android:interpolator="@android:anim/accelerate_decelerate_interpolator"
        android:toYDelta="100%p"
        />
    <alpha
        android:duration="500"
        android:fromAlpha="1.0"
        android:toAlpha="0.0"
        />
</set>