PopupWindow底部弹出

说明:从屏幕底部弹出PopupWindow,有弹出隐藏动画效果.背景设置透明度.

效果图例如以下:

1.MainActivity.java   显示popwindow,宽高跟屏幕大小一样,设置一个透明度背景

public class MainActivity extends Activity {
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		findViewById(R.id.button).setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
				showPopwindow();
			}
		});

	}

	private void showPopwindow() {
		View parent = ((ViewGroup) this.findViewById(android.R.id.content)).getChildAt(0);
		View popView = View.inflate(this, R.layout.camera_pop_menu, null);

		Button btnCamera = (Button) popView.findViewById(R.id.btn_camera_pop_camera);
		Button btnAlbum = (Button) popView.findViewById(R.id.btn_camera_pop_album);
		Button btnCancel = (Button) popView.findViewById(R.id.btn_camera_pop_cancel);

		int width = getResources().getDisplayMetrics().widthPixels;
		int height = getResources().getDisplayMetrics().heightPixels;

		final PopupWindow popWindow = new PopupWindow(popView,width,height);
		popWindow.setAnimationStyle(R.style.AnimBottom);
		popWindow.setFocusable(true);
		popWindow.setOutsideTouchable(false);// 设置同意在外点击消失

		OnClickListener listener = new OnClickListener() {
			public void onClick(View v) {
				switch (v.getId()) {
				case R.id.btn_camera_pop_camera:
					
					break;
				case R.id.btn_camera_pop_album:
					
					break;
				case R.id.btn_camera_pop_cancel:
					
					break;
				}
				popWindow.dismiss();
			}
		};

		btnCamera.setOnClickListener(listener);
		btnAlbum.setOnClickListener(listener);
		btnCancel.setOnClickListener(listener);

		ColorDrawable dw = new ColorDrawable(0x30000000);
		popWindow.setBackgroundDrawable(dw);
		popWindow.showAtLocation(parent, Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0);
	}

}

2.camera_pop_menu.xml   Popupwindow载入的布局文件

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_margin="10dp"
        android:orientation="vertical" >

        <Button
            android:id="@+id/btn_camera_pop_camera"
            style="@style/txt_camera_pop_menu"
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:background="@drawable/pop_first_selector"
            android:text="@string/camera_pop_camera"
            android:textSize="18sp" />

        <Button
            android:id="@+id/btn_camera_pop_album"
            style="@style/txt_camera_pop_menu"
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:background="@drawable/pop_last_selector"
            android:text="@string/camera_pop_album"
            android:textSize="18sp" />

        <Button
            android:id="@+id/btn_camera_pop_cancel"
            style="@style/txt_camera_pop_menu"
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:layout_marginTop="10dp"
            android:background="@drawable/pop_single_selector"
            android:text="@string/camera_pop_cancel"
            android:textSize="18sp" />
    </LinearLayout>

</RelativeLayout>

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来源：https://www.cnblogs.com/cynchanpin/p/7082243.html