popupwindow从底部弹出

参考了网上的一些代码，自己写了个类，上代码

/**
 * Created by Lee on 2016/2/26.
 */
public class CameraPopupWindow {

    private PopupWindow popupWindow;
    private Context context;

    public CameraPopupWindow(Context context){
        this.context = context;
    }

    /**
     * 初始化PopupWindow
     * @param view
     */
    public void initPopupWindow(View view){
        popupWindow = new PopupWindow(view, LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, true);
        popupWindow.setTouchable(true);
        popupWindow.setOutsideTouchable(true);
        popupWindow.setBackgroundDrawable(new BitmapDrawable(context.getResources(), (Bitmap) null));

        popupWindow.getContentView().setFocusableInTouchMode(true);
        popupWindow.getContentView().setFocusable(true);
        popupWindow.setAnimationStyle(R.style.anim_menu_bottombar);
        popupWindow.getContentView().setOnKeyListener(new View.OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if(keyCode == KeyEvent.KEYCODE_MENU && event.getRepeatCount() == 0
                        && event.getAction() == KeyEvent.ACTION_DOWN){
                    if(popupWindow != null && popupWindow.isShowing()){
                        popupWindow.dismiss();
                    }
                    return true;
                }
                return false;
            }
        });
    }

    /**
     * 设置PopupWindow位于底部
     * @param parent
     * @param view
     */
    public void showAtBottom(View parent, View view){
        popupWindow.showAtLocation(parent, Gravity.BOTTOM, 0, 0);
        popupWindow.showAsDropDown(view);
    }

    /**
     * dismiss PopupWindow
     */
    public void dismiss(){
        popupWindow.dismiss();
    }
}

style文件

<style name="anim_menu_bottombar">
        <item name="android:windowEnterAnimation">@anim/menu_bottombar_in</item>
        <item name="android:windowExitAnimation">@anim/menu_bottombar_out</item>
    </style>

anim文件 menu_bottombar_in.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="250"
        android:fromYDelta="100.0%"
        android:toYDelta="0.0" />
</set>

menu_bottombar_out.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:duration="250"
        android:fromYDelta="0.0"
        android:toYDelta="100%" />
</set>

外部调用

View popupView = getLayoutInflater().inflate(R.layout.layout_popupwindow_camera, null);
        cameraPopupWindow = new CameraPopupWindow(this);
        cameraPopupWindow.initPopupWindow(popupView);