popupwindow从底部弹出

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

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

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

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