import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.List; import android.app.Activity; import android.content.Context; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.os.Bundle; import android.preference.PreferenceManager; import android.telephony.CellInfo; import android.telephony.TelephonyManager; import android.view.Menu; import android.widget.TextView; public class MainActivity extends Activity {  private TextView tv;  private TextView tv2;  // ///////////////////////////////////  static String  ISDOUBLE;  static String  SIMCARD;  static String  SIMCARD_1;  static String  SIMCARD_2;  static boolean  isDouble;  // //////////////////////////////////  @Override  protected void onCreate(Bundle savedInstanceState)  {   super.onCreate(savedInstanceState);   setContentView(R.layout.activity_main);   tv = (TextView) findViewById(R.id.text);   tv2 = (TextView) findViewById(R.id.text2);   tv2.setText("不知道哪個卡可用！");   getNumber();  }  private void getNumber()  {   TelephonyManager tm = (TelephonyManager) this.getSystemService(this.TELEPHONY_SERVICE);   String phoneNumber1 = tm.getLine1Number();   // String phoneNumber2 = tm.getGroupIdLevel1();   initIsDoubleTelephone(this);   if (isDouble)   {    // tv.setText("這是雙卡手機！");    tv.setText("本機號碼是：" + " " + phoneNumber1 + " " + "這是雙卡手機！");   } else   {    // tv.setText("這是單卡手機");    tv.setText("本機號碼是：" + " " + phoneNumber1 + " " + "這是單卡手機");   }  }  public void initIsDoubleTelephone(Context context)  {   isDouble = true;   Method method = null;   Object result_0 = null;   Object result_1 = null;   TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);   try   {    // 只要在反射getSimStateGemini 這個函數時報了錯就是單卡手機（這是我自己的經驗，不一定全正確）    method = TelephonyManager.class.getMethod("getSimStateGemini", new Class[]    { int.class });    // 獲取SIM卡1    result_0 = method.invoke(tm, new Object[]    { new Integer(0) });    // 獲取SIM卡2    result_1 = method.invoke(tm, new Object[]    { new Integer(1) });   } catch (SecurityException e)   {    isDouble = false;    e.printStackTrace();    // System.out.println("1_ISSINGLETELEPHONE:"+e.toString());   } catch (NoSuchMethodException e)   {    isDouble = false;    e.printStackTrace();    // System.out.println("2_ISSINGLETELEPHONE:"+e.toString());   } catch (IllegalArgumentException e)   {    isDouble = false;    e.printStackTrace();   } catch (IllegalAccessException e)   {    isDouble = false;    e.printStackTrace();   } catch (InvocationTargetException e)   {    isDouble = false;    e.printStackTrace();   } catch (Exception e)   {    isDouble = false;    e.printStackTrace();    // System.out.println("3_ISSINGLETELEPHONE:"+e.toString());   }   SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);   Editor editor = sp.edit();   if (isDouble)   {    // 保存為雙卡手機    editor.putBoolean(ISDOUBLE, true);    // 保存雙卡是否可用    // 如下判斷哪個卡可用.雙卡都可以用    if (result_0.toString().equals("5") && result_1.toString().equals("5"))    {     if (!sp.getString(SIMCARD, "2").equals("0") && !sp.getString(SIMCARD, "2").equals("1"))     {      editor.putString(SIMCARD, "0");     }     editor.putBoolean(SIMCARD_1, true);     editor.putBoolean(SIMCARD_2, true);     tv2.setText("雙卡可用");    } else if (!result_0.toString().equals("5") && result_1.toString().equals("5"))    {// 卡二可用     if (!sp.getString(SIMCARD, "2").equals("0") && !sp.getString(SIMCARD, "2").equals("1"))     {      editor.putString(SIMCARD, "1");     }     editor.putBoolean(SIMCARD_1, false);     editor.putBoolean(SIMCARD_2, true);     tv2.setText("卡二可用");    } else if (result_0.toString().equals("5") && !result_1.toString().equals("5"))    {// 卡一可用     if (!sp.getString(SIMCARD, "2").equals("0") && !sp.getString(SIMCARD, "2").equals("1"))     {      editor.putString(SIMCARD, "0");     }     editor.putBoolean(SIMCARD_1, true);     editor.putBoolean(SIMCARD_2, false);     tv2.setText("卡一可用");    } else    {// 兩個卡都不可用(飛行模式會出現這種種情況)     editor.putBoolean(SIMCARD_1, false);     editor.putBoolean(SIMCARD_2, false);     tv2.setText("飛行模式");    }   } else   {    // 保存為單卡手機    editor.putString(SIMCARD, "0");    editor.putBoolean(ISDOUBLE, false);   }   editor.commit();  }  @Override  public boolean onCreateOptionsMenu(Menu menu)  {   // Inflate the menu; this adds items to the action bar if it is present.   getMenuInflater().inflate(R.menu.main, menu);   return true;  } } 

<uses-permission android:name="android.permission.READ_PHONE_STATE" />

// 遍歷 TelephonyManager 里的方法public void printTelephonyManagerMethodNamesForThisDevice() { TelephonyManager telephony = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); Class<?> telephonyClass; try {  telephonyClass = Class.forName(telephony.getClass().getName());  Method[] methods = telephonyClass.getMethods();  for (int i = 0; i < methods.length; i++) {   Log.i(TAG, "/n" + methods[i] + " declared by " + methods[i].getDeclaringClass());  } } catch (ClassNotFoundException e) {  e.printStackTrace(); }}// 獲取雙卡雙待 SIM 卡序列號public void getSubscriberId() { TelephonyManager telephony = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); Class<?> telephonyClass; Object result = null; Object result0 = null; Object result1 = null; try {  telephonyClass = Class.forName(telephony.getClass().getName());  Method m1 = telephonyClass.getMethod("getSubscriberId");  Method m2 = telephonyClass.getMethod("getSubscriberId", new Class[]{int.class});  result = m1.invoke(telephony);  result0 = m2.invoke(telephony, 0);  result1 = m2.invoke(telephony, 1); } catch (Exception e) {  e.printStackTrace(); } Log.i(TAG, " getSubscriberId : " + telephony.getSubscriberId() + "/n"   + " result : " + result + "/n"   + " result0 : " + result0 + "/n"   + " result1 : " + result1 + "/n");}