Android实用的代码片段 常用代码总结
1：查看是否有存储卡插入
Stringstatus=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Layoutthis.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.
TextViewmsgTextView=(TextView)findViewById(R.id.msg); msgTextView.setText(R.string.push_me);
4：发送短信
Stringbody="thisismmsdemo";
Intentmmsintent=newIntent(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
StringBuildersb=newStringBuilder();
sb.append("file://");
sb.append(fd.getAbsoluteFile());
Intentintent=newIntent(Intent.ACTION_SENDTO,Uri.fromParts("mmsto",number,null));
//Belowextradatasarealloptional.
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)
6：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);
7：注册一个BroadcastReceiver
registerReceiver(mMasterResetReciever,newIntentFilter("oms.action.MASTERRESET"));
privateBroadcastReceivermMasterResetReciever=newBroadcastReceiver(){
publicvoidonReceive(Contextcontext,Intentintent){
Stringaction=intent.getAction();
if("oms.action.MASTERRESET".equals(action)){
RecoverDefaultConfig();
}
}
}
8：定义ContentObserver，监听某个数据表
privateContentObservermDownloadsObserver=newDownloadsChangeObserver(Downloads.CONTENT_URI);
privateclassDownloadsChangeObserverextendsContentObserver{
publicDownloadsChangeObserver(Uriuri){
super(newHandler());
}
@Override
publicvoidonChange(booleanselfChange){｝
}
9：获得手机UA
publicStringgetUserAgent()
{
Stringuser_agent=ProductProperties.get(ProductProperties.USER_AGENT_KEY,null);
returnuser_agent;
}
10：清空手机上Cookie
CookieSyncManager.createInstance(getApplicationContext());
CookieManager.getInstance().removeAllCookie();11：建立GPRS连接
//DialtheGPRSlink. privatebooleanopenDataConnection(){ //Setupdataconnection. DataConnectionconn=DataConnection.getInstance(); if(connectMode==0){ ret=conn.openConnection(mContext,"cmwap","cmwap","cmwap"); }else{ ret=conn.openConnection(mContext,"cmnet","",""); } }