我正在尝试使用ForecastIO API
我可以成功获取此API的当前天气数据，但我不明白如何正确检索此API的每日天气数据。
我认为问题在于MainActivity.java中的getDailyForecast方法，该方法从第200行开始。
package com.joshbgold.stormy;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import com.squareup.okhttp.Call;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.IOException;
import butterknife.ButterKnife;
import butterknife.InjectView;
public class MainActivity extends ActionBarActivity {
public static final String TAG = MainActivity.class.getSimpleName();
private CurrentWeather mCurrentWeather;
private Day[] mDailyWeather;
@InjectView(R.id.timeLabel) TextView mTimeLabel; //declares time variable, and links it to the layout
@InjectView(R.id.temperatureLabel) TextView mTempuratureLabel;
@InjectView(R.id.humidityValue) TextView mHumidityValue;
@InjectView(R.id.precipValue) TextView mPrecipValue;
@InjectView(R.id.summaryLabel) TextView mSummaryLabel;
@InjectView(R.id.iconImageView) ImageView mIconImageView;
@InjectView(R.id.windValue) TextView mWindValue;
@InjectView(R.id.refreshImageView) ImageView mRefreshImageView;
@InjectView(R.id.progressBar) ProgressBar mProgressBar;
@InjectView(R.id.highTempValue) TextView mHighTemperature;
@InjectView(R.id.lowTempValue) TextView mLowTemperature;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.inject(this); //allows us to use a shortcut to link layout elements
mProgressBar.setVisibility(View.INVISIBLE);
final double latitude = 45.5233;
final double longitude = -122.6762;
mRefreshImageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
getForecast(latitude, longitude);
}
});
getForecast(latitude, longitude);
Log.d(TAG, "Main UI code is running!");
}
private void getForecast(double latitude, double longitude) {
String apiKey = "21526f648c8ed449028d2533c39e7f4f";
String forecastURL = "https://api.forecast.io/forecast/" + apiKey + "/" + latitude + "," + longitude;
if (isNetworkAvailable()) {
toggleRefresh();
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(forecastURL)
.build();
Call call = client.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Request request, IOException e) {
runOnUiThread(new Runnable() {
@Override
public void run() {
toggleRefresh();
}
});
alertUserAboutError();
}
@Override
public void onResponse(Response response) throws IOException {
runOnUiThread(new Runnable() {
@Override
public void run() {
toggleRefresh();
}
});
try {
String jsonData = response.body().string();
Log.v(TAG, jsonData);
if (response.isSuccessful()) {
mCurrentWeather = getCurrentDetails(jsonData);
runOnUiThread(new Runnable() {
@Override
public void run() {
updateDisplay();
}
});
mDailyWeather = getDailyForecast(jsonData);
runOnUiThread(new Runnable() {
@Override
public void run() {
updateDisplay();
}
});
Log.v(TAG, response.body().string());
} else {
alertUserAboutError();
}
} catch (IOException e) {
Log.e(TAG, "Exception caught: ", e);
}
catch (JSONException e){
Log.e(TAG, "Exception caught: ", e);
}
}
});
}
}
private void toggleRefresh() {
if (mProgressBar.getVisibility() == View.INVISIBLE) {
mProgressBar.setVisibility(View.VISIBLE);
mRefreshImageView.setVisibility(View.INVISIBLE);
}
else {
mProgressBar.setVisibility(View.INVISIBLE);
mRefreshImageView.setVisibility(View.VISIBLE);
}
}
private void updateDisplay() {
mTempuratureLabel.setText(mCurrentWeather.getTemperature() + "");
mTimeLabel.setText("At " + mCurrentWeather.getFormattedTime() + " it will be");
mHumidityValue.setText(mCurrentWeather.getHumidity() + "%");
mPrecipValue.setText(mCurrentWeather.getPrecipChance() + "%");
mWindValue.setText(mCurrentWeather.getWindSpeed()+ " MPH");
mHighTemperature.setText(mDailyWeather[0].getHighTemperature() + "");
mLowTemperature.setText(mDailyWeather[0].getLowTemperature() + "");
mSummaryLabel.setText(mCurrentWeather.getSummary());
Drawable drawable = getResources().getDrawable(mCurrentWeather.getIconId());
mIconImageView.setImageDrawable(drawable);
}
private CurrentWeather getCurrentDetails(String jsonData) throws JSONException{
JSONObject forecast = new JSONObject(jsonData);
String timezone = forecast.getString("timezone");
Log.i(TAG, "From JSON: " + timezone);
JSONObject currently = forecast.getJSONObject("currently");
CurrentWeather currentWeather = new CurrentWeather();
currentWeather.setHumidity(currently.getDouble("humidity"));
currentWeather.setTime(currently.getLong("time"));
currentWeather.setIcon(currently.getString("icon"));
currentWeather.setPrecipChance(currently.getDouble("precipProbability"));;
currentWeather.setSummary(currently.getString("summary"));
currentWeather.setTemperature(currently.getDouble("temperature"));
currentWeather.setTimeZone(timezone);
currentWeather.setWindSpeed(currently.getDouble("windSpeed"));
currentWeather.setWindBearing(currently.getInt("windBearing"));
Log.d(TAG, currentWeather.getFormattedTime());
Log.d(TAG, String.valueOf(currentWeather.getWindSpeed()) + " MPH");
Log.d(TAG, String.valueOf(currentWeather.getWindBearing()) + " degrees");
return currentWeather;
}
private Day[] getDailyForecast(String jsonData) throws JSONException {
JSONObject forecast = new JSONObject(jsonData);
String timezone = forecast.getString("timezone");
JSONObject daily = forecast.getJSONObject("daily");
JSONArray data = daily.getJSONArray("data");
Day[] mDailyWeather = new Day[data.length()];
for (int i=0; i < data.length(); i++) {
JSONObject jsonDay = data.getJSONObject(i);
Day day = new Day();
day.setTimeZone(timezone);
day.setHighTemperature(jsonDay.getDouble("temperatureMax"));
day.setLowTemperature(jsonDay.getDouble("temperatureMin"));
mDailyWeather[i] = day;
Log.d(TAG, String.valueOf(day.getHighTemperature() + " degrees F"));
Log.d(TAG, String.valueOf(day.getLowTemperature() + " degrees F"));
}
return mDailyWeather;
}
private boolean isNetworkAvailable() {
ConnectivityManager manager = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = manager.getActiveNetworkInfo();
boolean isAvailable = false;
if(networkInfo != null && networkInfo.isConnected()){
isAvailable = true;
}
else{
Toast.makeText(this, getString(R.string.network_unavailable_message),
Toast.LENGTH_LONG).show();
}
return isAvailable;
}
private void alertUserAboutError() {
AlertDialogFragment dialog = new AlertDialogFragment();
dialog.show(getFragmentManager(),"error_dialog");
}
}
答案 0 :(得分：0)
在onUpdateDisplay初始化之前，您正在调用mDailyWeather。
删除第一个电话：
mCurrentWeather = getCurrentDetails(jsonData);
mDailyWeather = getDailyForecast(jsonData);
runOnUiThread(new Runnable() {
@Override
public void run() {
updateDisplay();
}
});