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本文详细介绍了如何在AndroidiOS应用中使用PopWindow，包括其类定义、在Activity中的使用方法以及监听实现。文章还展示了PopWindow的自定义动画效果，使读者能够深入理解并灵活运用这一UI组件。

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专注于android ios app 开发，大家一起学习，一起进步，今天记录一下PopWindow的使用，废话不多说了，直接上代码

//PopWindow 类

public class SelectPicPopupWindow extends PopupWindow {

	private Button btn_take_photo, btn_pick_photo, btn_cancel;
	private View mMenuView;

	public SelectPicPopupWindow(Activity context, OnClickListener itemsOnClick) {
		super(context);
		LayoutInflater inflater = (LayoutInflater) context
				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		mMenuView = inflater.inflate(R.layout.popwindow, null);
		btn_take_photo = (Button) mMenuView.findViewById(R.id.btn_take_photo);
		btn_pick_photo = (Button) mMenuView.findViewById(R.id.btn_pick_photo);
		btn_cancel = (Button) mMenuView.findViewById(R.id.btn_cancel);
		// 取消按钮
		btn_cancel.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				// 销毁弹出框
				dismiss();
			}
		});
		// 设置按钮监听
		btn_pick_photo.setOnClickListener(itemsOnClick);
		btn_take_photo.setOnClickListener(itemsOnClick);
		// 设置SelectPicPopupWindow的View
		this.setContentView(mMenuView);
		// 设置SelectPicPopupWindow弹出窗体的宽
		this.setWidth(LayoutParams.FILL_PARENT);
		// 设置SelectPicPopupWindow弹出窗体的高
		this.setHeight(LayoutParams.WRAP_CONTENT);
		// 设置SelectPicPopupWindow弹出窗体可点击
		this.setFocusable(true);
		// 设置SelectPicPopupWindow弹出窗体动画效果
		this.setAnimationStyle(R.style.PopupAnimation);
		// 实例化一个ColorDrawable颜色为半透明
		ColorDrawable dw = new ColorDrawable(0xb0000000);
		// 设置SelectPicPopupWindow弹出窗体的背景
		this.setBackgroundDrawable(dw);
		// mMenuView添加OnTouchListener监听判断获取触屏位置如果在选择框外面则销毁弹出框
		mMenuView.setOnTouchListener(new OnTouchListener() {

			public boolean onTouch(View v, MotionEvent event) {

				int height = mMenuView.findViewById(R.id.pop_layout).getTop();
				int y = (int) event.getY();
				if (event.getAction() == MotionEvent.ACTION_UP) {
					if (y < height) {
						dismiss();
					}
				}
				return true;
			}
		});

	}

}

//PopWindow 在activity中的使用

	menuWindow = new SelectPicPopupWindow(TimeFlashActivity.this,
				itemsOnClick);
        menuWindow.showAtLocation(findViewById(R.id.parent), Gravity.BOTTOM
	     | Gravity.CENTER_HORIZONTAL, 0, 0); // 设置layout在PopupWindow中显示的位置

// 为弹出窗口实现监听类
	private OnClickListener itemsOnClick = new OnClickListener() {

	public void onClick(View v) {
		menuWindow.dismiss();
		switch (v.getId()) {
		case R.id.btn_take_photo:
			Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
			startActivityForResult(intent, 1);

			break;
		case R.id.btn_pick_photo:
			Intent intentPick = new Intent(Intent.ACTION_PICK);
			intentPick.setType("image/*");// 相片类型
			startActivityForResult(intentPick, 2);
			break;
		default:
			break;
		}

		}

	};

//PopWindow 使用到的 进入和退出的动画PopupAnimation

<style name="PopupAnimation" parent="android:Animation">
        <item name="android:windowEnterAnimation">@anim/popup_enter</item>
        <item name="android:windowExitAnimation">@anim/popup_exit</item>
    </style>

  //@anim/popup_enter

<translate
        android:duration="400"
        android:fromYDelta="100%"
        android:toYDelta="0%" />

    <alpha
        android:duration="400"
        android:fromAlpha="0.0"
        android:interpolator="@android:anim/decelerate_interpolator"
        android:toAlpha="1.0" />

 //@anim/popup_exit

<translate
        android:duration="400"
        android:fromYDelta="0%"
        android:toYDelta="100%" />

    <alpha
        android:duration="400"
        android:fromAlpha="1.0"
        android:interpolator="@android:anim/accelerate_interpolator"
        android:toAlpha="0.0" />