Dialog自定义！

package com.example.furen.com.furenceping;import android.app.Dialog;import android.content.Context;import android.view.Gravity;import android.widget.TextView;import com.examclass.UIActivity.R;public class CustomProgressDialog extends Dialog {private static CustomProgressDialog customProgressDialog = null;public CustomProgressDialog(Context context) {super(context);}public CustomProgressDialog(Context context,int theme){super(context,theme);}public static CustomProgressDialog createDialog(Context context){customProgressDialog = new CustomProgressDialog(context,R.style.CustomProgressDialog);customProgressDialog.setContentView(R.layout.customprogressdialog);customProgressDialog.getWindow().getAttributes().gravity = Gravity.CENTER;        return customProgressDialog;    }    public void onWindowFocusChanged(boolean hasFocus){        if (customProgressDialog == null){            return;        }    }    public CustomProgressDialog setTitile(String strTitle){        return customProgressDialog;    }    public CustomProgressDialog setMessage(String strMessage){        TextView tvMsg = (TextView)customProgressDialog.findViewById(R.id.id_tv_loadingmsg);        if (tvMsg != null){            tvMsg.setText(strMessage);        }        return customProgressDialog;    }}