[Android]Android5.0实现静默接听电话功能

原因：

android以前可以通过AIDL进行静默接听，但是5.0以后就被谷歌给屏蔽了，这时候我们只能通过其他方式实现了。

解决方案：

try {            Runtime.getRuntime().exec("input keyevent " +                    Integer.toString(KeyEvent.KEYCODE_HEADSETHOOK));        } catch (IOException e) {            // Runtime.exec(String) had an I/O problem, try to fall back            String enforcedPerm = "android.permission.CALL_PRIVILEGED";            Intent btnDown = new Intent(Intent.ACTION_MEDIA_BUTTON).putExtra(                    Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN,                            KeyEvent.KEYCODE_HEADSETHOOK));            Intent btnUp = new Intent(Intent.ACTION_MEDIA_BUTTON).putExtra(                    Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP,                            KeyEvent.KEYCODE_HEADSETHOOK));            mContext.sendOrderedBroadcast(btnDown, enforcedPerm);            mContext.sendOrderedBroadcast(btnUp, enforcedPerm);        }

简单说就是发送一个耳机按下接听的事件，欺骗系统。