我正在尝试使用Weatherlib API创建天气应用。我在下面有这个代码。我正在尝试搜索城市模式，但不幸的是，okhttp提出了url == null的异常。
我创建了一个验证，以便在输入至少4个字母时开始搜索。一旦我输入第四个字母，我就会得到这个例外...
有没有人使用过Weatherlib并遇到过这个问题？
WeatherClient.ClientBuilder builder = new WeatherClient.ClientBuilder();
WeatherConfig config = new WeatherConfig();
config.unitSystem = WeatherConfig.UNIT_SYSTEM.I;
config.lang = "en"; // set language to english
config.maxResult = 5; // max number of cities retrieved
config.numDays = 6 ; //maximum days in the forecast
try {
client = builder.attach(this)
.provider(new ForecastIOProviderType())
.httpClient(WeatherDefaultClient.class)
.config(config)
.build();
} catch (WeatherProviderInstantiationException e) {
e.printStackTrace();
}
final EditText searchedText = (EditText) findViewById(R.id.searchText);
searchedText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
search = searchedText.getText().toString();
if (search.length() > 3)
{
list.clear();
try {
System.out.println("testingbefore");
// reaches this point for the last
client.searchCity(search.toString(), new WeatherClient.CityEventListener() {
@Override
public void onCityListRetrieved(List cities) {
// The data is ready
// does not reach this point
System.out.println("testing");
for (Object c : cities) {
list.add(((City) c).getName());
}
}
@Override
public void onWeatherError(WeatherLibException e) {
// Error on geting data
System.out.println("testingError");
}
@Override
public void onConnectionError(Throwable throwable) {// Connection error
System.out.println("testingConnection");
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
以下错误消息
10-09 15:35:24.681 11596-11596/ie.betterweather.betterweather I/System.out? testingbefore
10-09 15:35:24.688 11596-11596/ie.betterweather.betterweather W/System.err? java.lang.IllegalArgumentException: url == null
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at com.squareup.okhttp.Request$Builder.url(Request.java:148)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at com.survivingwithandroid.weather.lib.client.okhttp.WeatherDefaultClient._doSearchCity(WeatherDefaultClient.java:149)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at com.survivingwithandroid.weather.lib.client.okhttp.WeatherDefaultClient.searchCity(WeatherDefaultClient.java:92)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at ie.betterweather.betterweather.MainActivity$1.onTextChanged(MainActivity.java:81)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.widget.TextView.sendOnTextChanged(TextView.java:7722)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.widget.TextView.handleTextChanged(TextView.java:7782)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.widget.TextView$ChangeWatcher.onTextChanged(TextView.java:9514)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.text.SpannableStringBuilder.sendTextChanged(SpannableStringBuilder.java:964)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:515)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:454)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:33)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.view.inputmethod.BaseInputConnection.replaceText(BaseInputConnection.java:685)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.view.inputmethod.BaseInputConnection.setComposingText(BaseInputConnection.java:445)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper.java:340)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at com.android.internal.view.IInputConnectionWrapper$MyHandler.handleMessage(IInputConnectionWrapper.java:78)
10-09 15:35:24.689 11596-11596/ie.betterweather.betterweather W/System.err? at android.os.Handler.dispatchMessage(Handler.java:102)
10-09 15:35:24.690 11596-11596/ie.betterweather.betterweather W/System.err? at android.os.Looper.loop(Looper.java:211)
10-09 15:35:24.690 11596-11596/ie.betterweather.betterweather W/System.err? at android.app.ActivityThread.main(ActivityThread.java:5373)
10-09 15:35:24.690 11596-11596/ie.betterweather.betterweather W/System.err? at java.lang.reflect.Method.invoke(Native Method)
10-09 15:35:24.690 11596-11596/ie.betterweather.betterweather W/System.err? at java.lang.reflect.Method.invoke(Method.java:372)
10-09 15:35:24.690 11596-11596/ie.betterweather.betterweather W/System.err? at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1020)
10-09 15:35:24.690 11596-11596/ie.betterweather.betterweather W/System.err? at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:815)
答案 0 :(得分：0)
ForecastIOProvider不支持按城市名称查询，所以url，你应该使用lat和long。 希望它能帮到你！