android - OnReceive() 方法自动触发

Question

我在 Activity 中创建了一个接收器，用于在连接互联网时自动调用网络服务。

代码如下

//Create receiver for while network will come auto call webservice

private BroadcastReceiver mConnReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        boolean noConnectivity = intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
        if (!noConnectivity) {
            bar.setVisibility(View.VISIBLE);
            callAuthorizeWebservice();
        } else {
            bar.setVisibility(View.INVISIBLE);
            Toast.makeText(SplashScreenActivity.this, "Check Your Internet connection", Toast.LENGTH_LONG).show();
        }
    }
};

@Override
    protected void onStop() {
        super.onStop();
        unregisterReceiver(mConnReceiver);
    }

    @Override
    protected void onStart() {
        super.onStart();
        this.registerReceiver(this.mConnReceiver,
                new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
    }

当我打开那个 Activity 时，onReceive() 方法每次都会被调用。
如何避免第一次调用它(在打开该 Activity 时)？

Answer 1

当你第一次注册时发送广播(cf sticky broadcast)，一个解决方案是在你的BroadcastReceiver的onReceive回调中使用isInitialStickyBroadcast 了解您是否真的在进行粘性广播并采取相应行动 ( BroadcastReceiver : isInitialStickyBroadcast )