Dialog设置全屏

final Dialog dialog = new Dialog(mContext, R.style.popdialog);
		dialog.setContentView(R.layout.im_view_img);
		dialog.setCanceledOnTouchOutside(true);
		dialog.setCancelable(true);
		ImageView img_view = (ImageView) dialog.findViewById(R.id.iv_view_img);
		imageLoader.DisplayImage(url, img_view);

		dialog.show();
		/**************Dialog设置全屏***************/
//		WindowManager windowManager =getWindowManager();
		WindowManager windowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
		Display display = windowManager.getDefaultDisplay();
		WindowManager.LayoutParams lp = dialog.getWindow().getAttributes();
		lp.width = (int)(display.getWidth()); //设置宽度
		dialog.getWindow().setAttributes(lp);
		/****************************************/
		img_view.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View arg0) {
				if (dialog != null && dialog.isShowing()) {
					dialog.dismiss();
				}

			}
		});
	}

<style name="popdialog" parent="@android:style/Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <!-- 边框 -->
        <item name="android:windowIsFloating">true</item>
        <!-- 是否浮现在activity之上 -->
        <item name="android:backgroundDimEnabled">false</item>
        <!-- 模糊 -->
        <item name="android:windowIsTranslucent">false</item>
        <!-- 半透明 -->
        <item name="android:windowNoTitle">true</item>
        <!-- 无标题 -->
        <item name="android:windowBackground">@android:color/black</item>
        <!-- 背景透明 -->
        <item name="android:windowAnimationStyle">@style/dialog_animation</item>
 		<!-- 弹出或者进入时的动画效果 -->
        <item name="android:windowFullscreen">true</item>
 		<!-- 全屏 -->

    </style>