Android常用小功能精编

/* 
         * 获取当前的手机号 
         */ 
        public String getLocalNumber() { 
                TelephonyManager tManager = (TelephonyManager) this 
                                .getSystemService(TELEPHONY_SERVICE); 
                String number = tManager.getLine1Number(); 
；                return number; 
        } 
1.
2.
3.
4.
5.
6.
7.
8.
9.

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; 
        } 
    } 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.

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; 
        } 
    } 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.

//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; 
} 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.

/** 
     * 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; 
    } 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.

//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()); 
1.
2.
3.
4.
5.
6.
7.
8.

/**  
     * 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;   
    } 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.

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)); 
    } 
} 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.

//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); 
1.
2.
3.
4.
5.
6.

// 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 
                                    } 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.

/** 
     * 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; 
    } 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.

* @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; 
    } 
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.