android 自定义Dialog背景透明及显示位置设置

先贴一下显示效果图，仅作参考：

 

 

代码如下：

 

1、自定义Dialog

 

public   class  SelectDialog extends AlertDialog{

public  SelectDialog(Context context,  int  theme) {
    super(context, theme);
}

public  SelectDialog(Context context) {
    super(context);
}

@Override
protected   void  onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.slt_cnt_type);
}
}

 

 

2、布局文件slt_cnt_type.xml代码 

 

xml version = " 1.0 "  encoding = " utf-8 " ?>
< LinearLayout
  xmlns:android = " http://schemas.android.com/apk/res/android "
  android:orientation = " vertical "
  android:padding = " 10dp "  android:layout_width = " 115dp "  android:layout_height = " wrap_content "  android:background = " @color/blue " >
     < Button android:layout_height = " wrap_content "  android:background = " #00000000 "  android:layout_width = " fill_parent "  android:text = " 全部联系人 "  android:paddingTop = " 5dp "  android:paddingBottom = " 5dp "  android:paddingLeft = " 10dp "  android:gravity = " left|center_vertical "  android:id = " @+id/btnSltCntAll " > Button >
     < Button android:layout_height = " wrap_content "  android:background = " #00000000 "  style = " @drawable/greenhand_button "  android:text = " 咕咚用户 "  android:gravity = " left|center_vertical "  android:paddingBottom = " 5dp "  android:paddingTop = " 5dp "  android:paddingLeft = " 10dp "  android:paddingRight = " 10dp "  android:layout_width = " fill_parent "  android:id = " @+id/btnSltGudongUser " > Button >
     < Button style = " @drawable/greenhand_button "  android:background = " #00000000 "  android:layout_height = " wrap_content "  android:layout_width = " fill_parent "  android:text = " 推荐用户 "  android:gravity = " left|center_vertical "  android:paddingTop = " 5dp "  android:paddingBottom = " 5dp "  android:paddingLeft = " 10dp "  android:id = " @+id/btnSltRecommend " > Button >
LinearLayout >

 

3、颜色color.xml代码

 

xml version = " 1.0 "  encoding = " utf-8 " ?>
< resources >
   < color name = " transparent " > # 00000000 color >
resources >

 

4、样式style.xml代码

 

xml version = " 1.0 "  encoding = " utf-8 " ?>
< resources >
     < style name = " dialog "  parent = " @android:style/Theme.Dialog " >
         < item name = " android:windowFrame " > @null item >
         < item name = " android:windowIsFloating " > true item >
         < item name = " android:windowIsTranslucent " > false item >
         < item name = " android:windowNoTitle " > true item >
         < item name = " android:windowBackground " > @color/transparent item >
         < item name = " android:backgroundDimEnabled " > false item >
     style >
resources >

 

 

4、显示Dialog

 

SelectDialog selectDialog  =   new  SelectDialog( this ,R.style.dialog);//创建Dialog并设置样式主题
Window win  =  selectDialog.getWindow();
LayoutParams params  =   new  LayoutParams();
params.x  =   - 80 ;//设置x坐标
params.y  =   - 60 ;//设置y坐标
win.setAttributes(params);
selectDialog.setCanceledOnTouchOutside( true );//设置点击Dialog外部任意区域关闭Dialog
selectDialog.show();