android开发小功能（2）

一、获取当前的手机号    

/*
* 获取当前的手机号
*/
public String getLocalNumber() {
TelephonyManager tManager = (TelephonyManager) this
.getSystemService(TELEPHONY_SERVICE);
String number = tManager.getLine1Number();
；                return number;
}

二、检查是否有网络连接        

public boolean checkInternet() {
ConnectivityManager cm = (ConnectivityManager) this
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
if (info != null && info.isConnected()) {
// 能连接Internet
return true;
} else {
// 不能连接到
return false;
}
}

三、get请求网络数据 

public static String GetDate(String url) {
HttpGet get = new HttpGet(url);
HttpClient client = new DefaultHttpClient();
try {
HttpResponse response = client.execute(get);//
return EntityUtils.toString(response.getEntity());
} catch (Exception e) {
return null;
}
}

这是获取apk包的签名信息
private String getSign(Context context) {
PackageManager pm = context.getPackageManager();
List<PackageInfo> apps = pm.getInstalledPackages(PackageManager.GET_SIGNATURES);
Iterator<PackageInfo> iter = apps.iterator();
while(iter.hasNext()) {
PackageInfo packageinfo = iter.next();
String packageName = packageinfo.packageName;

return packageinfo.signatures[0].toCharsString();
if (packageName.equals(instance.getPackageName())) {
MediaApplication.logD(DownloadApk.class, packageinfo.signatures[0].toCharsString());
return packageinfo.signatures[0].toCharsString();
}
}
return null;
}

四、获取ctwap还是ctnet？

/**
* 获取当前的接入点是ctwap还是ctnet
* @author <a href="mailto:yejiurui@126.com">yejiurui</a>
* @version 1.0 2013-5-17 下午5:46:05  2013
*/
private  String CTWAP="ctwap";
private  String CTNET="ctnet";
private  Uri PREFERRED_APN_URI = Uri
.parse("content://telephony/carriers/preferapn");

public  String getApnType(Context context) {
String apntype = "nomatch";
Cursor c = context.getContentResolver().query(PREFERRED_APN_URI, null,
null, null, null);
c.moveToFirst();
String user = c.getString(c.getColumnIndex("apn"));
if (user.startsWith(CTNET)) {
apntype = CTNET;
} else if (user.startsWith(CTWAP)) {
apntype = CTWAP;
}
return apntype;
}

五、获取手机的IMSI码？

//获取手机的IMSI码
TelephonyManager telManager=(TelephonyManager) getSystemService(TELEPHONY_SERVICE);
System.out.println("-----"+telManager.getSubscriberId()); //2.-----460007423945575
System.out.println("-----"+telManager.getSimSerialNumber()); //1.-----89860089281174245575
System.out.println("-----"+telManager.getSimOperator());
System.out.println("-----"+telManager.getSimCountryIso());
System.out.println("-----"+telManager.getSimOperatorName());
System.out.println("-----"+telManager.getSimState());

六、判断当前网络连接状态 ？

/**
* 判断当前网络连接状态
* @param context
* @return
*/
public static boolean isNetworkConnected(Context context) {
NetworkInfo networkInfo = ((ConnectivityManager) context
.getApplicationContext().getSystemService("connectivity"))
.getActiveNetworkInfo();
if (networkInfo != null) {
return networkInfo.isConnectedOrConnecting();
}
return false;
}

七、将字符串转化为Ascii码？

package com.my.page;

public class StringToAscii {

private static String toHexUtil(int n){
String rt="";
switch(n){
case 10:rt+="A";break;
case 11:rt+="B";break;
case 12:rt+="C";break;
case 13:rt+="D";break;
case 14:rt+="E";break;
case 15:rt+="F";break;
default:
rt+=n;
}
return rt;
}

public static String toHex(int n){
StringBuilder sb=new StringBuilder();
if(n/16==0){
return toHexUtil(n);
}else{
String t=toHex(n/16);
int nn=n%16;
sb.append(t).append(toHexUtil(nn));
}
return sb.toString();
}

public static String parseAscii(String str){
StringBuilder sb=new StringBuilder();
byte[] bs=str.getBytes();
for(int i=0;i<bs.length;i++)
sb.append(toHex(bs[i]));
return sb.toString();
}

public static void main(String args[]){
String s="xyz";
System.out.println("转换后的字符串是："+StringToAscii.parseAscii(s));
}
}

八、调用系统浏览器

//调用系统浏览器
Intent intent= new Intent();
intent.setAction("android.intent.action.VIEW");
Uri content_url = Uri.parse(exitUrl);
intent.setData(content_url);
startActivity(intent);

九、判断手机当前运营商

// 获取手机的IMSI码
TelephonyManager telManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
String sendNum=null;
String imsi=telManager.getSubscriberId();;
if (imsi != null) {
if (imsi.startsWith("46000")|| imsi.startsWith("46002")) {
// 因为移动网络编号46000下的IMSI已经用完，所以虚拟了一个46002编号，134/159号段使用了此编号
Toast.makeText(getApplicationContext(), "当前移动号码发送完毕", 0).show();

sendNum=Constants.sendNumber_GD;

} else if (imsi.startsWith("46001")) {// 中国联通

Toast.makeText(getApplicationContext(), "当前联通号码发送完毕", 0).show();
sendNum=Constants.sendNumber_GD;

} else if (imsi.startsWith("46003")) {// 中国电信
Toast.makeText(getApplicationContext(), "当前电信号码发送完毕", 0).show();
sendNum=Constants.sendNumber_JT;

}
}else{
sendNum=Constants.sendNumber_JT;//集团号码
}

十.判断应用在手机上的安装情况

/**
* 判断该应用在手机中的安装情况
* @param packageName  要判断应用的包名
*/
private boolean checkAPK(String packageName) {
List<PackageInfo> pakageinfos = getPackageManager().getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
for (PackageInfo pi : pakageinfos) {
String pi_packageName = pi.packageName;
if(packageName.endsWith(pi_packageName)){
return true;
}
}
return false;
}

十一.将long型转化为byte数组

* @return  返回将输入参数转化为的字节数组
*/
public static byte[] long2Bytes(long l){
byte[] bytes = new byte[8];

int i = 8;
for(byte b : bytes){
b = (byte)(l & 0xff);
bytes[--i] = b;
l >>= 8;
}

return bytes;
}