如何在android中屏蔽来电而不显示来电？

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

public class CallReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // 获取来电号码
        String incomingNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
        
        // 拦截来电
        TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        try {
            Class<?> telephonyClass = Class.forName(telephonyManager.getClass().getName());
            Method method = telephonyClass.getDeclaredMethod("getITelephony");
            method.setAccessible(true);
            Object telephonyInterface = method.invoke(telephonyManager);
            Class<?> telephonyInterfaceClass = Class.forName(telephonyInterface.getClass().getName());
            Method endCallMethod = telephonyInterfaceClass.getDeclaredMethod("endCall");
            endCallMethod.invoke(telephonyInterface);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

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

private static final int PERMISSION_REQUEST_CODE = 1;

private void requestPermission() {
    if (ContextCompat.checkSelfPermission(this, Manifest.permission.MODIFY_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.MODIFY_PHONE_STATE}, PERMISSION_REQUEST_CODE);
    } else {
        // 已经拥有权限，执行屏蔽来电的操作
        blockIncomingCall();
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    if (requestCode == PERMISSION_REQUEST_CODE) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            // 权限被授予，执行屏蔽来电的操作
            blockIncomingCall();
        } else {
            // 权限被拒绝，无法屏蔽来电
            Toast.makeText(this, "无法屏蔽来电，权限被拒绝", Toast.LENGTH_SHORT).show();
        }
    }
}

private void blockIncomingCall() {
    // 执行屏蔽来电的操作
    // ...
}