<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="CustomDialogTheme" parent="@android:style/Theme.Dialog">
<item name="android:windowBackground">@color/transparent_white</item>
<item name="android:windowIsFloating">false</item>
<item name="android:windowNoTitle">true</item>
</style>
</resources>

这里面呢如果windowIsFloating是false，那么就是设置自己的颜色 ，就需要在windowBackground

设置自己所要展示的。

myDialog = new Dialog(this, R.style.CustomDialogTheme);构造自己定义的就可以了

public class MyActivity extends Activity {
  @Override
  public void onAttachedToWindow() {
    super.onAttachedToWindow();
    Window window = getWindow();
    // Eliminates color banding
    window.setFormat(PixelFormat.RGBA_8888);
  }
}

http://stuffthathappens.com/blog/2010/06/04/android-color-banding/

2.

setDither(true)

取得手机屏幕分辨率:

android.util.DisplayMetrics;
    DisplayMetrics metrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(metrics);
    int height = metrics.heightPixels;
    int width = metrics.widthPixels;
	
    或者:
    Display display = getWindowManager().getDefaultDisplay();
    display.getWidth();
    display.getHeight();