Android Dialog 系统样式讲解及透明背景

转自：http://blog.sina.com.cn/s/blog_3e333c4a0102vk0f.html

AlertDialog.Builder builder = new AlertDialog.Builder(DialogActivity.this,AlertDialog.THEME_TRADITIONAL);//传统主题





AlertDialog.Builder builder = new AlertDialog.Builder(DialogActivity.this,AlertDialog.THEME_HOLO_DARK);//使用深色背景 主题





AlertDialog.Builder builder = new AlertDialog.Builder(DialogActivity.this,AlertDialog.THEME_HOLO_LIGHT);//使用浅色背景 主题





AlertDialog.Builder builder = new AlertDialog.Builder(DialogActivity.this,AlertDialog.THEME_DEVICE_DEFAULT_DARK);//使用默认设备 深色主题





AlertDialog.Builder builder = new AlertDialog.Builder(DialogActivity.this,AlertDialog.THEME_DEVICE_DEFAULT_LIGHT);//使用默认设备 浅色主题





//自定义布局 
View layout = getActivity().getLayoutInflater().inflate(R.layout.mydialog,null);
AlertDialog.Builder dialog = new AlertDialog.Builder(DialogActivity.this,AlertDialog.THEME_DEVICE_DEFAULT_DARK);

final AlertDialog dialog = builder.create();
dialog.setView(layout);

//透明
Window window = dialog.getWindow(); 
WindowManager.LayoutParams lp = window.getAttributes();
lp.alpha = 0.9f;
window.setAttributes(lp);

。。。

dialog.show();