Question

我有一个列表视图片段，其中填充了来自数组适配器的数据。列表视图的每个项目都包含一个按钮。我想这样做，当你按下按钮时，服务被初始化。我在CustomAdaptor类中实现了一个Receiver类及其on接收方法，

public class LikeReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent)
    {
        String result=intent.getExtras().getString("result");
        Toast t3 = Toast.makeText(context, result, Toast.LENGTH_LONG);
        t3.show();
    }

我已实施以下服务类

public class LikeService  extends IntentService {

public LikeService() {
    super("Like");
}

@Override
protected void onHandleIntent(@Nullable Intent intent) {

    OkHttpClient client = new OkHttpClient();

    Request request = new Request.Builder()
            .url("http://api.fixer.io/latest?base=EUR&symbols="+"USD")
            .build();

    Response response = null;

    try {

        response = client.newCall(request).execute();

        JSONObject json = new JSONObject(response.body().string());

        String code=intent.getAction();

        double ratio = json.getJSONObject("rates").getDouble(code);

        Intent i = new Intent("Like");
        i.putExtra("result", ratio);

        LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(i);

    } catch (IOException e) {
        e.printStackTrace();
    } catch (JSONException e) {
        e.printStackTrace();
    }

}

  }

以下方法位于Adapter类中，应该初始化服务

public void askLikes()  {
    Intent i = new Intent(context, LikeService.class);
    String postid=Integer.toString(id);

    context.startService(i);
}

在适配器的getView方法中定义的按钮的on Click侦听器如下：

    like.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            askLikes();

            LikeReceiver receiver = new LikeReceiver();
            IntentFilter filter = new IntentFilter("Like");
            LocalBroadcastManager.getInstance(context).registerReceiver(receiver, filter);

        }
    });

问题是，当我按下按钮时，吐司不会显示

在自定义适配器类中初始化服务

0 个答案: