Android编程15个很有用的代码片段.docVIP

Android编程15个很有用的代码片段 Android代码 1：查看是否有存储卡插入 String status=environment.getexternalstoragestate(); if(status.equals(enviroment.media_mounted)) { 说明有sd卡插入} 2：让某个activity透明oncreate中不设layout this.settheme(r.style.theme_transparent); 以下是theme_transparent的定义（注意transparent_bg是一副透明的图片） 3：在屏幕元素中设置句柄 使用activity.findviewbyid来取得屏幕上的元素的句柄. 使用该句柄您可以设置或获取任何该对象外露的值. textview msgtextview = (textview)findviewbyid(r.id.msg); msgtextview.settext(r.string.push_me); 4:发送短信 string body=”this is mms demo”; intent mmsintent = new intent(intent.action_sendto, uri.fromparts(”smsto”, number, null)); mmsintent.putextra(messaging.key_action_sendto_message_body, body); mmsintent.putextra(messaging.key_action_sendto_compose_mode, true); mmsintent.putextra(messaging.key_action_sendto_exit_on_sent, true); startactivity(mmsintent); 5:发送彩信 stringbuilder sb = new stringbuilder(); sb.append(”file://”); sb.append(fd.getabsolutefile()); intent intent = new intent(intent.action_sendto, uri.fromparts(”mmsto”, number, null)); // below extra datas are all optional. intent.putextra(messaging.key_action_sendto_message_subject, subject); intent.putextra(messaging.key_action_sendto_message_body, body); intent.putextra(messaging.key_action_sendto_content_uri, sb.tostring()); intent.putextra(messaging.key_action_sendto_compose_mode, composemode); intent.putextra(messaging.key_action_sendto_exit_on_sent, exitonsent); startactivity(intent); 7：发送mail mime = “img/jpg”; shareintent.setdataandtype(uri.fromfile(fd), mime); shareintent.putextra(intent.extra_stream, uri.fromfile(fd)); shareintent.putextra(intent.extra_subject, subject); shareintent.putextra(intent.extra_text, body); 8:注册一个broadcastreceiver registerreceiver(mmasterresetreciever, new intentfilter