android 菜单事件处理

时间：2022-11-26 18:11:55
package com.example.wenandroid;

import android.app.Activity;

import android.os.Bundle;

import android.view.ContextMenu;

import android.view.ContextMenu.ContextMenuInfo;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.TextView;

public class OptionMenuDemo extends Activity {

private static final int MENU_ITEM_COUNTER=Menu.FIRST;

private TextView mtextview;

	@Override

protected void onCreate(Bundle savedInstanceState) {

	super.onCreate(savedInstanceState);

	setContentView(R.layout.optionmenu);

	mtextview=(TextView)findViewById(R.id.mtextview);

	mtextview.setText("要大一点才能看清楚");

	registerForContextMenu(mtextview);

}

	@Override

	public void onCreateContextMenu(ContextMenu menu, View v,

			ContextMenuInfo menuInfo) {

		menu.add(0,MENU_ITEM_COUNTER+1,0,"白色");

		menu.add(0, MENU_ITEM_COUNTER+2, 0, "黄色");

		menu.add(0, MENU_ITEM_COUNTER+3, 0, "蓝色");

		super.onCreateContextMenu(menu, v, menuInfo);

	}

	@Override

	public boolean onContextItemSelected(MenuItem item) {

		switch(item.getItemId()){

		case MENU_ITEM_COUNTER+1:

			mtextview.setBackgroundResource(R.drawable.first);

		break;

		case MENU_ITEM_COUNTER+2:

			mtextview.setBackgroundResource(R.drawable.second);

		break;

		case MENU_ITEM_COUNTER+3:

			mtextview.setBackgroundResource(R.drawable.third);

		break;

		}

		return super.onContextItemSelected(item);

	}

}

相关文章