自定义dialog宽度全屏

AlertDialog.Builder dialog = new AlertDialog.Builder(UnbindBankCardActivity.this, R.style.Dialog_FS);
View view = View.inflate(UnbindBankCardActivity.this, R.layout.view_chakanshilitupian_alertdialog, null);
final AlertDialog alertDialog = dialog.create();
alertDialog.setView(view);
alertDialog.show();

/**
 * 设置dialog宽度全屏
 */
WindowManager m = getWindowManager();
Display d = m.getDefaultDisplay();  //为获取屏幕宽、高
android.view.WindowManager.LayoutParams params = alertDialog.getWindow().getAttributes();  //获取对话框当前的参数值、
params.width = (int) (d.getWidth());    //宽度设置全屏宽度
alertDialog.getWindow().setAttributes(params);     //设置生效

注意！！！！！！！！！！！
以上设置并不能使dialog全屏，还要将dialog的style这样改将原来的