java - 跳过了 104 帧!应用程序可能在其主线程上做了太多工作

Question

我在 StackOverflow 上检查了答案，但没有找到太多。所以，我这样做是为了练习，就像使用 JSON 的 Hello World 一样，我从 openweather API 获取 JSON 响应。我在 EditText 中写入城市名称，然后按按钮进行搜索并在日志中显示 JSON 字符串。

public class MainActivity extends AppCompatActivity {
EditText city;
public void getData(View view){
    String result;
    String cityName = city.getText().toString();
    getWeather weather = new getWeather();
    try {
        result = weather.execute(cityName).get();
        System.out.println(result);
    } catch (InterruptedException e) {
        e.printStackTrace();
    } catch (ExecutionException e) {
        e.printStackTrace();
    }
}

public class getWeather extends AsyncTask<String, Void, String>{

    @Override
    protected String doInBackground(String... urls) {
        URL url;
        HttpURLConnection connection = null;
        String result = "";

        try {
            String finalString = urls[0];
            finalString = finalString.replace(" ", "%20");
            String fullString = "http://api.openweathermap.org/data/2.5/forecast?q=" + finalString + "&appid=a18dc34257af3b9ce5b2347bb187f0fd";
            url = new URL(fullString);
            connection = (HttpURLConnection) url.openConnection();
            InputStream in = connection.getInputStream();
            InputStreamReader reader = new InputStreamReader(in);
            int data = reader.read();
            while(data != -1){
                char current = (char) data;
                result += current;
                data = reader.read();
            }
            return result;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;

    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    city = (EditText) findViewById(R.id.editText);
}
}

我该怎么做才能不收到该消息？

Answer 1

weather.execute(cityName).get()

当您执行 get() 时，您正在等待 AsyncTask 完成。因此，您正在 Ui 线程上运行所有繁重的操作。

来自documentation of get() :

Waits if necessary for the computation to complete, and then retrieves its result.

删除 get()。