具體如下 ： 

	private void writeDelivery() {
		View layout = getLayoutInflater().inflate(R.layout.dialog_write_delivery,null);
		
		EditText inputCmpny = (EditText) layout.findViewById(R.id.inputCmpny);
		EditText inputExprNum = (EditText) layout.findViewById(R.id.inputExprNum);
		
		int H;
		H = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
		layout.measure(0, H);
		H = layout.getMeasuredHeight();

		pop = new PopupWindow(layout, DeviceUtil.getScreenPixels(this).getWidth(), H);
		ColorDrawable cd = new ColorDrawable(-0000);
		pop.setBackgroundDrawable(cd);

		// 設定出現和消失樣式
		pop.setAnimationStyle(R.style.vertical_slide);
		
		pop.update();
		pop.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
		pop.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
		pop.setTouchable(true); // 設定popupwindow可點選
		pop.setOutsideTouchable(true); // 設定popupwindow外部可點選
		pop.setFocusable(true); // 獲取焦點
		pop.showAtLocation(layout, Gravity.BOTTOM, 0, 0);

		// 設定動畫
		setAlphaValueAnimation(1.0f, 0.5f);

		pop.setOnDismissListener(new PopupWindow.OnDismissListener() {

			@Override
			public void onDismiss() {

				// 設定動畫
				setAlphaValueAnimation(0.5f, 1.0f);

			}
		});

		pop.setTouchInterceptor(new View.OnTouchListener() {
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				/**** 如果點選了popupwindow的外部，popupwindow也會消失 ****/
				if (event.getAction() == MotionEvent.ACTION_OUTSIDE) {
					pop.dismiss();
					return true;
				}
				return false;
			}

		});

	}
 

主要的解決地方 ：

//這句話，讓pop覆蓋在輸入法上面

pop.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);

//這句話，讓pop自適應輸入狀態
pop.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);