<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:gravity="center" android:id="@+id/ll_image"> <Button android:id="@+id/bt_select_image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="選擇圖片" /></LinearLayout>

public class MainActivity extends AppCompatActivity implements View.OnClickListener { private SelectPicPopupWindow menuWindow; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViewById(R.id.bt_select_image).setOnClickListener(this); } @Override public void onClick(View view) { switch (view.getId()) {  case R.id.bt_select_image:  //TODO implement  selectImgs(); } } private void selectImgs(){ menuWindow = new SelectPicPopupWindow(MainActivity.this, itemsOnClick); //設置彈窗位置 menuWindow.showAtLocation(MainActivity.this.findViewById(R.id.ll_image), Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0); } private View.OnClickListener itemsOnClick = new View.OnClickListener() { public void onClick(View v) {  menuWindow.dismiss();  switch (v.getId()) {  case R.id.item_popupwindows_camera: //點擊拍照按鈕   break;  case R.id.item_popupwindows_Photo: //點擊從相冊中選擇按鈕   break;  default:   break;  } } };}

 **public class SelectPicPopupWindow extends PopupWindow {  private Button item_popupwindows_camera, //彈窗拍照按鈕   item_popupwindows_Photo,  //彈窗從相冊選擇按鈕   item_popupwindows_cancel;  //彈窗取消按鈕  private View menuview;  /**  * 上傳圖片*************************  * @param context  * @param itemsOnclick  */  public SelectPicPopupWindow(Activity context, View.OnClickListener itemsOnclick){  super(context);  LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  menuview = inflater.inflate(R.layout.item_popupwindows,null);  item_popupwindows_camera = (Button) menuview.findViewById(R.id.item_popupwindows_camera); //拍照按鈕  item_popupwindows_cancel = (Button) menuview.findViewById(R.id.item_popupwindows_cancel); //取消按鈕  item_**popupwindows_Photo = (Button) menuview.findViewById(R.id.item_popupwindows_Photo); //圖庫按鈕  /**   * 取消按鈕銷毀事件   */  item_popupwindows_cancel.setOnClickListener(new View.OnClickListener() {   public void onClick(View view) {   dismiss();   }  });  item_popupwindows_camera.setOnClickListener(itemsOnclick);  item_popupwindows_Photo.setOnClickListener(itemsOnclick);  //設置SelectPicPopupWindow的View  this.setContentView(menuview);  //設置SelectPicPopupWindow**彈出窗體的寬  this.setWidth(ViewGroup.LayoutParams.FILL_PARENT);  //設置SelectPicPopupWindow彈出窗體的高  //修改高度顯示，解決被手機底部虛擬鍵擋住的問題 by黃海杰 at:2015-4-30  this.setHeight(ViewGroup.LayoutParams.MATCH_PARENT);  //設置SelectPicPopupWindow彈出窗體可點擊  this.setFocusable(true);  //設置SelectPicPopupWindow彈出窗體動畫效果  //this.setAnimationStyle(R.style);  //實例化一個ColorDrawable顏色為半透明  ColorDrawable dw = new ColorDrawable(0xb0000000);  //設置SelectPicPopupWindow彈出窗體的背景  this.setBackgroundDrawable(dw);  //menuview添加ontouchlistener監聽判斷獲取觸屏位置如果在選擇框外面則銷毀彈出框  menuview.setOnTouchListener(new View.OnTouchListener() {   public boolean onTouch(View view, MotionEvent motionEvent) {   int height = menuview.findViewById(R.id.ll_popup).getTop();   int y = (int) motionEvent.getY();   if (motionEvent.getAction() == MotionEvent.ACTION_UP){    if (y<height){    dismiss();    }   }   return true;   }  });  } }**