在Android项目中实现一个底部支付弹窗的方法

public class BottomDialogView extends PopupWindow {  private View dialogView;  private EditText payPassEt;  private Button cancelBtn, confirmBtn;  private ImageView backDialogIv;   public BottomDialogView(Activity context, final BottomDialogOnclickListener bottomDialogOnclickListener) {  super(context);  LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  dialogView = inflater.inflate(R.layout.dialog, null);  backDialogIv = (ImageView) dialogView.findViewById(R.id.backDialogIv);  payPassEt = (EditText) dialogView.findViewById(R.id.payPassEt);  cancelBtn = (Button) dialogView.findViewById(R.id.cancelBtn);  confirmBtn = (Button) dialogView.findViewById(R.id.confirmBtn);  backDialogIv.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View view) {   dismiss();   }  });  cancelBtn.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View view) {   dismiss();   }  });  confirmBtn.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View view) {   bottomDialogOnclickListener.onPositiveClick(payPassEt.getText().toString().trim(), BottomDialogView.this);   }  });    this.setContentView(dialogView);  this.setWidth(LayoutParams.MATCH_PARENT);  this.setHeight(LayoutParams.MATCH_PARENT);  this.setFocusable(true);  this.setAnimationStyle(R.style.DialogShowStyle); //设置弹出窗体动画效果  ColorDrawable dw = new ColorDrawable(0xb0000000);  this.setBackgroundDrawable(dw);   dialogView.setOnTouchListener(new OnTouchListener() {   public boolean onTouch(View v, MotionEvent event) {   int height = dialogView.findViewById(R.id.pop_layout).getTop();   int y = (int) event.getY();   if (event.getAction() == MotionEvent.ACTION_UP) {    if (y < height) { //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 //   dismiss();    }   }   return true;   }  });   }  }