安卓发带权限广播老是失败

 private Broad b;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.broad).setOnClickListener(this);
        b=new Broad();
        IntentFilter inf=new IntentFilter();
        inf.addAction("xhj");
        registerReceiver(b,inf,"com.android.permission.SEND_XXX",null);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(b);
    }

    @Override
    public void onClick(View v) {
        Intent i=new Intent("xhj");
        sendBroadcast(i,"com.android.permission.SEND_XXX");
    }

  <permission android:name="com.android.permission.SEND_XXX"
        android:protectionLevel="normal"></permission>

帮忙看下哪里出错了，广播老是接受不到