採用popwindow實現無黑邊彈窗

程式碼：

public class ExitGameDialog{  
		  
	    Context context;
	    RelativeLayout contentViewbg;
	    RelativeLayout contentView;
	    RelativeLayout.LayoutParams content_parms;
	    android.view.ViewGroup.LayoutParams  alert_layout_parms;
	    String orgen="#fe9d00";
	    String green="#5ec324";
	    PopupWindow  pop;
	    public ExitGameDialog(Context context,ExitGameCallBack mBack1)
	    {  
	          //super(context);  
	          this.context = context;   
	          this.mBack=mBack1; 
	          WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
		      int screenwidth = manager.getDefaultDisplay().getWidth();
		      int screenHeight = manager.getDefaultDisplay().getHeight();
		      int leftAndRight=DisplayUtil.dip2px(context,25);
	          		      
		      //xml中佈局直接View view = inflater.inflate(R.layout.test_alertdialog_listview,null);引入即可
		      //<!------------------------程式碼設定佈局，xml佈局可以直接跳過換用inflate引入------------------------------->
		      //全屏透明背景
		      contentViewbg=new RelativeLayout(context);
	          alert_layout_parms=new LayoutParams(android.view.ViewGroup.LayoutParams.MATCH_PARENT,android.view.ViewGroup.LayoutParams.MATCH_PARENT);
	          contentViewbg.setBackgroundColor(Color.parseColor("#ba000000"));	
	          contentViewbg.setGravity(Gravity.CENTER);	          
	          contentView=new RelativeLayout(context);
	          content_parms=new RelativeLayout.LayoutParams(screenwidth-2*leftAndRight,RelativeLayout.LayoutParams.WRAP_CONTENT);
	          contentView.setBackgroundColor(Color.WHITE);
	          contentView.setGravity(Gravity.CENTER);
	          contentView.setPadding(leftAndRight,leftAndRight,leftAndRight,leftAndRight);
	          
	          LinearLayout content_layout=new LinearLayout(context);
	          RelativeLayout.LayoutParams content_layout_parms=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
	          content_layout.setOrientation(LinearLayout.VERTICAL);
	          
	          
	          TextView tv_title=new TextView(context);
              LinearLayout.LayoutParams  tv_title_parms=new LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);
              tv_title_parms.gravity=Gravity.CENTER_HORIZONTAL;
              tv_title.setText("溫馨提示");
	          tv_title.setTextColor(Color.parseColor(orgen));
	          tv_title.setTextSize(17);
	          
	          TextView tv_fgx=new TextView(context);
	          int fgxh=DisplayUtil.dip2px(context,0.5f);
	          LinearLayout.LayoutParams  tv_fgx_parms=new LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,fgxh);
	          tv_fgx_parms.topMargin=DisplayUtil.dip2px(context,15);
	          tv_fgx.setBackgroundColor(Color.GRAY);
	          
	          TextView tv_content=new TextView(context);
	          LinearLayout.LayoutParams  tv_content_parms=new LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);
	          tv_content_parms.topMargin=DisplayUtil.dip2px(context,25);
	          tv_content.setText("確認退出遊戲嗎？");
	          tv_content.setTextColor(Color.parseColor("#333333"));
	          tv_content.setTextSize(15);

	          LinearLayout  ll_btn_layout=new LinearLayout(context);
	          ll_btn_layout.setOrientation(LinearLayout.HORIZONTAL);
	          LinearLayout.LayoutParams  ll_btn_layout_parms=new LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);
	          ll_btn_layout_parms.topMargin=DisplayUtil.dip2px(context,25);
	          
	          int btn_top=DisplayUtil.dip2px(context,6);
	          
	          TextView  tv_ok=new TextView(context);
	          LinearLayout.LayoutParams  tv_ok_parms=new LayoutParams(0,LinearLayout.LayoutParams.WRAP_CONTENT);
	          tv_ok.setGravity(Gravity.CENTER);
	          tv_ok.setPadding(0, btn_top, 0, btn_top);
	          tv_ok_parms.weight=1;
	          tv_ok.setText("確定");
	          tv_ok.setTextColor(Color.WHITE);
	          tv_ok.setBackgroundColor(Color.parseColor(orgen));
	          tv_ok.setTextSize(15);
	          tv_ok.setOnClickListener(new View.OnClickListener() {
				
				@Override
				public void onClick(View v) {
					 pop.dismiss();
					 Log.e("test","click ok btn");
				}
			});	          
	          
	          TextView  tv_cancel=new TextView(context);
	          LinearLayout.LayoutParams  tv_cancel_parms=new LayoutParams(0,LinearLayout.LayoutParams.WRAP_CONTENT);
	          tv_cancel_parms.weight=1;
	          tv_cancel_parms.leftMargin=DisplayUtil.dip2px(context,20);
	          tv_cancel.setPadding(0, btn_top, 0, btn_top);
	          tv_cancel.setGravity(Gravity.CENTER);
	          tv_cancel.setText("返回");
	          tv_cancel.setTextColor(Color.WHITE);
	          tv_cancel.setTextSize(15);
	          tv_cancel.setBackgroundColor(Color.parseColor(green));
	          tv_cancel.setOnClickListener(new View.OnClickListener() {
					
					@Override
					public void onClick(View v) {
						pop.dismiss();
						Log.e("test","click goback btn");
					}
				});
	          	          
	          ll_btn_layout.addView(tv_ok, tv_ok_parms);
	          ll_btn_layout.addView(tv_cancel, tv_cancel_parms);
	          
	          content_layout.addView(tv_title,tv_title_parms);
	          content_layout.addView(tv_fgx,tv_fgx_parms);
	          content_layout.addView(tv_content,tv_content_parms);
	          content_layout.addView(ll_btn_layout,ll_btn_layout_parms);
	          contentView.addView(content_layout,content_layout_parms);          
	          contentViewbg.addView(contentView,content_parms);   
		      pop=new PopupWindow(contentViewbg, screenwidth, screenHeight);
		      pop.showAtLocation(contentViewbg,Gravity.CENTER, 0, 0);  
	    } 
}