<style name="addNoteType_error_Dialog" parent="@android:Theme.Dialog">
  <item name="android:windowFrame">@null</item>
  <item name="android:windowNoTitle">true</item>
  <item name="android:windowBackground">@color/color_shenhui</item>
  <item name="android:windowIsFloating">true</item>
  <item name="android:windowContentOverlay">@null</item>
</style>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:orientation="vertical"
 android:background="#DFDFDF">
 <TextView
  android:layout_width="fill_parent"
  android:layout_height="50dp"
  android:gravity="center_vertical"
  android:layout_marginLeft="5dp"
  android:text="@string/txt_addnoteType_error_title"
  android:textColor="#00CCFF"
  android:textSize="18sp"
  />
 <View
   android:layout_width="fill_parent"
   android:layout_height="1px"
   android:background="#00CCFF"
 />
 <TextView
  android:layout_width="fill_parent"
  android:layout_height="50dp"
  android:gravity="left|center"
  android:layout_marginTop="5dp"
  android:text="@string/txt_addnoteType_error_content_null"
  />
 <View
   android:layout_width="fill_parent"
   android:layout_height="1px"
   android:background="#BBB9BA"
   android:layout_marginTop="5dp"
 />
  <Button
   android:id="@+id/btn_add_note_addnotetype_Error_ok"
   android:layout_width="fill_parent"
   android:layout_height="50dp"
   android:text="@string/txt_ok"
   android:background="@null"
   />
</LinearLayout>

//此处直接new一个Dialog对象出来，在实例化的时候传入主题
dialog = new Dialog(Sel_NoteTypeActivity.this, R.style.addNoteType_error_Dialog);
//设置它的ContentView
dialog.setContentView(R.layout.dialog_addnotetype_error);
Button btn_add_note_addnotetype_Error_ok = (Button)dialog.findViewById(R.id.btn_add_note_addnotetype_Error_ok);
btn_add_note_addnotetype_Error_ok.setOnClickListener(new addnoteTypeErroClickListener());
dialog.show();

class addnoteTypeErroClickListener implements OnClickListener{
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   dialog.cancel();
  }
}

WindowManager.LayoutParams Layoutparams = dialog.getWindow().getAttributes();
Layoutparams.width = (int)(mScreenWidth *9 / 10); //设置宽度
dialog.getWindow().setAttributes(Layoutparams);