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：

android 自定义Dialog背景透明及显示位置设置_第1张图片

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();

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