PopWindow动画实现底部滑出菜单

1.结构目录

2.实现步骤

1.主布局activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <Button
        android:id="@+id/open"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:text="打开泡泡窗口" />

</RelativeLayout>

2.popupwindow.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <GridView
        android:id="@+id/gv"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="#00bfff"
        android:numColumns="4" >
    </GridView>

</LinearLayout>

3.MainActivity

public class MainActivity extends Activity implements OnClickListener {

	private Button open;
	private View parent;
	private View popView;
	private PopupWindow popupWindow;
	private GridView gv;

	private String[] names = { "生", "如", "夏", "花", "海", "阔", "天", "空" };
	private int[] images = { R.drawable.ic_launcher, R.drawable.ic_launcher,
			R.drawable.ic_launcher, R.drawable.ic_launcher,
			R.drawable.ic_launcher, R.drawable.ic_launcher,
			R.drawable.ic_launcher, R.drawable.ic_launcher };

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		parent = findViewById(R.id.main);
		open = (Button) findViewById(R.id.open);
		open.setOnClickListener(this);
		initPopupWindow();
	}

	/**
	 * 初始化popupWindow
	 */
	private void initPopupWindow() {
		popView = getLayoutInflater().inflate(R.layout.popupwindow, null);
		popupWindow = new PopupWindow(popView,
				ViewGroup.LayoutParams.MATCH_PARENT,
				ViewGroup.LayoutParams.WRAP_CONTENT);
		popupWindow.setFocusable(true);
		popupWindow.setBackgroundDrawable(new BitmapDrawable());
		popupWindow.setOutsideTouchable(true);
		gv = (GridView) popView.findViewById(R.id.gv);
		gv.setAdapter(MyAdapter());

	}

	/**
	 * 为GridView填充数据
	 *
	 * @return
	 */
	private ListAdapter MyAdapter() {
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
		for (int i = 0; i < names.length; i++) {
			Map<String, Object> map = new HashMap<String, Object>();
			map.put("names", names[i]);
			map.put("images", images[i]);
			list.add(map);
		}
		SimpleAdapter simpleAdapter = new SimpleAdapter(this, list,
				R.layout.pop_item, new String[] { "names", "images" },
				new int[] { R.id.tv, R.id.img });
		return simpleAdapter;
	}

	@Override
	public void onClick(View v) {
		//为popWindow添加动画效果
		popupWindow.setAnimationStyle(R.style.popWindow_animation);
		// 点击弹出泡泡窗口
		popupWindow.showAtLocation(parent, Gravity.BOTTOM, 0, 0);
	}
}

4.为了实现动画进出效果，定义两个布局文件

popupwindow_enter.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <translate
        android:duration="500"
        android:fromYDelta="100%p"
        android:toYDelta="0" />

    <alpha
        android:duration="500"
        android:fromAlpha="0.5"
        android:toAlpha="1.0" />

</set>

5.popupwindow_exit.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <alpha
        android:duration="500"
        android:fromAlpha="1.0"
        android:toAlpha="0.5" />

    <translate
        android:fromYDelta="0"
        android:toYDelta="100%p"
        android:duration="500" />

</set>

6.style.xml

 <style name="popWindow_animation">
        <item name="android:windowEnterAnimation">@anim/popupwindow_enter</item>
        <item name="android:windowExitAnimation">@anim/popupwindow_exit</item>
    </style>