如何从url方案启动android native facebook登录

Question

我使用我的webview应用程序使用本机facebook sdk，我的问题是如何从我的webview应用程序内的url方案启动facebook登录活动。请有人帮助我。

我的网址上有一个网址，如<a href="launchfacebook:true">Login Facebook</a>

目前使用facebook按钮启动以下示例。

public class AppLoginActivity extends AppCompatActivity {
LoginButton loginButton;
TextView textview;
CallbackManager callbackManager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        FacebookSdk.sdkInitialize(getApplicationContext());
        setContentView(R.layout.activity_app_login);
        loginButton = (LoginButton) findViewById(R.id.fblogin_button);
        callbackManager = CallbackManager.Factory.create();

        loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                String urlParam = "userid="+loginResult.getAccessToken().getUserId()+"&accesstoken="+loginResult.getAccessToken().getToken();
                Intent intent = new Intent(AppLoginActivity.this, FoodShopMainActivity.class);
                intent.putExtra("facebookUri",urlParam);
                startActivity(intent);
                finish();
            }
            @Override
            public void onCancel() {
                Toast.makeText(getApplicationContext(), "Action canceled!", Toast.LENGTH_SHORT).show();
                finish();
            }
            @Override
            public void onError(FacebookException error) {
                Toast.makeText(getApplicationContext(), "Something went wrong!", Toast.LENGTH_SHORT).show();
                finish();
            }
        });
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data){
        callbackManager.onActivityResult(requestCode, resultCode, data);
    }
}