Android設置黑名單電話掛斷

首先要在清單文件中加上權限：
讀取電話狀態權限

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

接受電話的狀態：

 <receiver android:name=".Myphoone">
            <intent-filter>
                <action android:name="android.intent.action.PHONE_STATE"></action>
            </intent-filter>
        </receiver>

寫一個類繼承BroadcastReceiver
具體實現步驟如下：

 if("android.intent.action.PHONE_STATE".equals(intent.getAction())){
            //得到電話管理者
            TelephonyManager telephonyManager= (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
            //得到電話的狀態
            int state=telephonyManager.getCallState();
            switch (state) {
                case TelephonyManager.CALL_STATE_RINGING:
                    //得到電話號碼
                    String number=intent.getStringExtra("incoming_number");
                    Log.i("test","來電了"+number);
                    //得到電話管理者類對象
                    Class<TelephonyManager> clazz=TelephonyManager.class;
                    //得到方法
                    Method method= null;
                    try {
                        method = clazz.getDeclaredMethod("getITelephony",null);
                    } catch (NoSuchMethodException e) {
                        e.printStackTrace();
                    }
                    //允許訪問私有的方法
                     method.setAccessible(true);
                        //執行方法
                    ITelephony iTelephony= null;
                    try {
                        iTelephony = (ITelephony) method.invoke(telephonyManager,null);
                    } catch (IllegalAccessException e) {
                        e.printStackTrace();
                    } catch (InvocationTargetException e) {
                        e.printStackTrace();
                    }
                    // /判斷是不是這個號碼是的話就掛斷

                        if("18274628579".equals(number)){
                            try {
                                iTelephony.endCall();
                            } catch (RemoteException e) {
                                e.printStackTrace();
                            }
                        }
                    break;
                case TelephonyManager.CALL_STATE_OFFHOOK:
                    Log.i("test","通話中...錄音中");
                    break;
                case TelephonyManager.CALL_STATE_IDLE:
                    Log.i("test","掛了");
                    break;
            }
        }