Android常用小功能代码精编

来源：互联网发布：java return递归编辑：程序博客网时间：2024/05/01 17:42

一、获取当前的手机号

   1: /*    2:  * 获取当前的手机号    3: */    4: public String getLocalNumber() {    5:         TelephonyManager tManager = (TelephonyManager) this.getSystemService(TELEPHONY_SERVICE);    6:         String number = tManager.getLine1Number();    7:         return number;    8: } 

二、检查是否有网络连接

   1: public boolean checkInternet() {    2:         ConnectivityManager cm = (ConnectivityManager) this    3:                 .getSystemService(Context.CONNECTIVITY_SERVICE);    4:         NetworkInfo info = cm.getActiveNetworkInfo();    5:         if (info != null && info.isConnected()) {    6:             // 能连接Internet    7:             return true;    8:         } else {    9:             // 不能连接到   10:             return false;   11:         }   12:     } 

三、get请求网络数据

   1: public static String GetDate(String url) {    2:         HttpGet get = new HttpGet(url);    3:         HttpClient client = new DefaultHttpClient();    4:         try {    5:             HttpResponse response = client.execute(get);   6:             return EntityUtils.toString(response.getEntity());    7:         } catch (Exception e) {    8:             return null;    9:         }   10:     } 

获取程序的签名信息

   1: //这是获取apk包的签名信息    2: private String getSign(Context context) {    3:   PackageManager pm = context.getPackageManager();    4:   List<PackageInfo> apps = pm.getInstalledPackages(PackageManager.GET_SIGNATURES);    5:   Iterator<PackageInfo> iter = apps.iterator();    6:   while(iter.hasNext()) {    7:        PackageInfo packageinfo = iter.next();    8:        String packageName = packageinfo.packageName;    9:           10:        return packageinfo.signatures[0].toCharsString();   11:        if (packageName.equals(instance.getPackageName())) {   12:           MediaApplication.logD(DownloadApk.class, packageinfo.signatures[0].toCharsString());   13:           return packageinfo.signatures[0].toCharsString();   14:        }   15: }   16:   return null;   17: } 

返回的签名信息结果为很长的一串数据

四、获取ctwap还是ctnet？

   1: /*   2:  * 获取当前的接入点是ctwap还是ctnet    3:  * @author <a href="mailto:yejiurui@126.com">yejiurui</a>     4:  * @version 1.0 2013-5-17 下午5:46:05  2013    5:  */    6: private  String CTWAP="ctwap";    7: private  String CTNET="ctnet";    8: private  Uri PREFERRED_APN_URI = Uri    9:     .parse("content://telephony/carriers/preferapn");   10:    11: public  String getApnType(Context context) {   12:     String apntype = "nomatch";   13:     Cursor c = context.getContentResolver().query(PREFERRED_APN_URI, null,   14:             null, null, null);   15:     c.moveToFirst();   16:     String user = c.getString(c.getColumnIndex("apn"));   17:     if (user.startsWith(CTNET)) {   18:         apntype = CTNET;   19:     } else if (user.startsWith(CTWAP)) {   20:         apntype = CTWAP;   21:     }   22:     return apntype;   23: } 

五、获取手机的IMSI码？

   1: //获取手机的IMSI码    2: TelephonyManager telManager=(TelephonyManager) getSystemService(TELEPHONY_SERVICE);    3: System.out.println("-----"+telManager.getSubscriberId()); //2.-----460007423945575    4: System.out.println("-----"+telManager.getSimSerialNumber()); //1.-----89860089281174245575    5: System.out.println("-----"+telManager.getSimOperator());    6: System.out.println("-----"+telManager.getSimCountryIso());    7: System.out.println("-----"+telManager.getSimOperatorName());    8: System.out.println("-----"+telManager.getSimState()); 

六、判断当前网络连接状态？

   1: /**     2: * 判断当前网络连接状态     3: * @param context     4: * @return     5: */      6: ublic static boolean isNetworkConnected(Context context) {      7:    NetworkInfo networkInfo = ((ConnectivityManager) context      8:            .getApplicationContext().getSystemService("connectivity"))      9:            .getActiveNetworkInfo();     10:    if (networkInfo != null) {     11:        return networkInfo.isConnectedOrConnecting();     12:    }     13:    return false;     14:  

七、将字符串转化为Ascii码？

   1: package com.my.page;    2:     3: public class StringToAscii {    4:         5:     private static String toHexUtil(int n){    6:         String rt="";    7:         switch(n){    8:         case 10:rt+="A";break;    9:         case 11:rt+="B";break;   10:         case 12:rt+="C";break;   11:         case 13:rt+="D";break;   12:         case 14:rt+="E";break;   13:         case 15:rt+="F";break;   14:         default:   15:             rt+=n;   16:         }   17:         return rt;   18:     }   19:        20:     public static String toHex(int n){   21:         StringBuilder sb=new StringBuilder();   22:         if(n/16==0){   23:             return toHexUtil(n);   24:         }else{   25:             String t=toHex(n/16);   26:             int nn=n%16;   27:             sb.append(t).append(toHexUtil(nn));   28:         }   29:         return sb.toString();   30:     }   31:        32:     public static String parseAscii(String str){   33:         StringBuilder sb=new StringBuilder();   34:         byte[] bs=str.getBytes();   35:         for(int i=0;i<bs.length;i++)   36:             sb.append(toHex(bs[i]));   37:         return sb.toString();   38:     }   39:    40:     public static void main(String args[]){   41:         String s="xyz";   42:         System.out.println("转换后的字符串是："+StringToAscii.parseAscii(s));   43:     }   44: }

八、调用系统浏览器

   1: //调用系统浏览器    2:  Intent intent= new Intent();            3:  intent.setAction("android.intent.action.VIEW");        4:  Uri content_url = Uri.parse(exitUrl);       5:  intent.setData(content_url);      6:  startActivity(intent); 

九、判断手机当前运营商

   1: // 获取手机的IMSI码    2: TelephonyManager telManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);    3: String sendNum=null;    4: String imsi=telManager.getSubscriberId();;    5: if (imsi != null) {    6:     if (imsi.startsWith("46000")|| imsi.startsWith("46002")) {    7:      // 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     8:     Toast.makeText(getApplicationContext(), "当前移动号码发送完毕", 0).show();    9:        10:     sendNum=Constants.sendNumber_GD;   11:        12:     } else if (imsi.startsWith("46001")) {  13:         // 中国联通    14:         Toast.makeText(getApplicationContext(), "当前联通号码发送完毕", 0).show();   15:         sendNum=Constants.sendNumber_GD;   16:            17:     } else if (imsi.startsWith("46003")) {  18:         // 中国电信   19:         Toast.makeText(getApplicationContext(), "当前电信号码发送完毕", 0).show();   20:         sendNum=Constants.sendNumber_JT;   21:            22:     }   23: }else{   24:     sendNum=Constants.sendNumber_JT;//集团号码  25: }  

十.判断应用在手机上的安装情况

   1: /**    2:  * 判断该应用在手机中的安装情况    3:  * @param packageName  要判断应用的包名    4:  */    5: private boolean checkAPK(String packageName) {    6:     List<PackageInfo> pakageinfos = getPackageManager().getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);    7:     for (PackageInfo pi : pakageinfos) {    8:         String pi_packageName = pi.packageName;    9:         if(packageName.endsWith(pi_packageName)){   10:             return true;   11:         }   12:     }   13:     return false;   14: } 

十一.将long型转化为byte数组.

   1: public static byte[] long2Bytes(long l){    2:     byte[] bytes = new byte[8];    3:         4:     int i = 8;    5:     for(byte b : bytes){    6:         b = (byte)(l & 0xff);    7:         bytes[--i] = b;    8:         l >>= 8;    9:     }   10:        11:     return bytes;   12: } 

注：本文转载自Andye，若需转载，请注明原作者链接。

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