对话框风格的activity

实现对话框风格的activity，我们需要在AndroidManifest.xml添加一句样式声明：

<activity
　　android:name=".product.MyselfPayProduct"
   android:screenOrientation="portrait"
   android:theme="@android:style/Theme.Dialog" >

控制对话框大小（即activity宽高）

        //窗口对齐屏幕宽度
        Window win = this.getWindow();
        win.getDecorView().setPadding(0, 0, 0, 0);
        WindowManager.LayoutParams lp = win.getAttributes();
        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
        lp.height =  (int) (getWindowManager().getDefaultDisplay().getHeight() * 0.7);
        lp.gravity = Gravity.BOTTOM;//设置对话框置顶显示
        win.setAttributes(lp);
        
        

---

        
        WindowManager m = getWindowManager();
        Display d = m.getDefaultDisplay();  //为获取屏幕宽、高
        WindowManager.LayoutParams p = getWindow().getAttributes();  //获取对话框当前的参数值
        p.height = (int) (d.getHeight() * 1.0);   //高度设置为屏幕的1.0---去除titlebar高度
        p.width = (int) (d.getWidth() * 0.7);    //宽度设置为屏幕的0.8
        p.alpha = 1.0f;      //设置本身透明度
        p.dimAmount = 0.0f;      //设置黑暗度
        getWindow().setAttributes(p);