Android弹出对话框容易代码

package com.zxing.dialog;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.content.Context;import android.content.DialogInterface;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class DialogTest extends Activity {	private static final int DIALOG	=	1;		    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        Button btn	=	(Button)findViewById(R.id.button1);        btn.setOnClickListener(new OnClickListener() {						@Override			public void onClick(View v) {				// TODO Auto-generated method stub				showDialog(DIALOG);//Activity里面的函数,然后调用onCreateDialog这个方法,最后调用onPrepareDialog这个方法			}		});    }	@Override	protected Dialog onCreateDialog(int id) {		// TODO Auto-generated method stub		if(id==1){		return this.buildDialog(DialogTest.this);		}else{			return null;		}	}	@Override	protected void onPrepareDialog(int id, Dialog dialog) {		// TODO Auto-generated method stub		super.onPrepareDialog(DIALOG, dialog);	}        private Dialog buildDialog(Context context){    	AlertDialog.Builder builder	=	new AlertDialog.Builder(context);    	builder.setIcon(R.drawable.alert_dialog_icon);    	builder.setTitle(R.string.alertitle);    	builder.setPositiveButton(R.string.right,new DialogInterface.OnClickListener() {						@Override			public void onClick(DialogInterface dialog, int which) {				// TODO Auto-generated method stub				setTitle("您单击了对话框上面的正确按钮");			}		});    	    	return builder.create();    }    }

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