无法看到的ListView [英] Not able to see ListView
本文介绍了无法看到的ListView的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我没有看到在ListView中我从网络服务中的所有数据的任何数据，但我没有看到这里面的ListView。
我得到的流量，我理解它从来没有进去getView（）方法
请给我解释一下什么是错将在code和建议我最好的之一。
公共类WeatherReport延伸活动{ ListView控件的ListView;
GPS_Location gpsObj;
BaseAdapter aAdapter;
双经纬度;
位图图像; @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.weather_report）;
ListView控件=（ListView控件）findViewById（R.id.listView）;
gpsObj =新GPS_Location（本）;
纬度= gpsObj.getLatitude（）;
经度= gpsObj.getLongitude（）;
的System.out.println（内部的onCreate（））;
字符串URL =http://api.openweathermap.org/data/2.5/forecast/daily?lat=+纬度+＆放大器;经度=+经度+＆放大器; CNT = 14安培;模式= json的;
新的getJSON（）执行（URL）;
// listView.setAdapter（新BAdapter（本））;
} 私有类的getJSON扩展的AsyncTask＆LT;字符串，字符串，字符串＆GT; {
字符串的cityName;
串经纬度;
ArrayList的＆LT; SingleRow＆GT;清单;
ArrayList的＆LT;串GT;湿度;
ArrayList的＆LT;串GT;速度;
ArrayList的＆LT;串GT;天气;
ArrayList的＆LT;串GT; tempMin;
ArrayList的＆LT;串GT; tempMax;
ArrayList的＆LT;串GT;描述;
ArrayList的＆LT;＆位图GT;图标; @覆盖
保护字符串doInBackground（字符串... PARAMS）{
字符串URL =参数[0];
湿度=新的ArrayList＆LT;串GT;（）;
速度=新的ArrayList＆LT;串GT;（）;
天气=新的ArrayList＆LT;串GT;（）;
tempMin =新的ArrayList＆LT;串GT;（）;
tempMax =新的ArrayList＆LT;串GT;（）;
图标=新的ArrayList＆LT;＆位图GT;（）;
说明=新的ArrayList＆LT;串GT;（）;
字符串数据;
尝试{
HttpClient的hClient =新DefaultHttpClient（）;
HTTPGET hGet =新HTTPGET（URL）;
ResponseHandler所＆LT;串GT; rHandler =新BasicResponseHandler（）;
数据= hClient.execute（hGet，rHandler）;
的System.out.println（内部doInBackground数据+数据）;
JSONObject的jObj =新的JSONObject（数据）;
的System.out.println（内部背景jObj+ jObj）;
的JSONObject的JSONObject = jObj.getJSONObject（城市）;
的cityName = jsonObject.getString（名称）;
JSONObject的jObjCoOrd = jsonObject.getJSONObject（坐标）;
纬度= jObjCoOrd.getString（纬度）;
的System.out.println（内部纬度+纬度）;
经度= jObjCoOrd.getString（LON）;
的System.out.println（内部经度+经度）; JSONArray jsonArray = jObj.getJSONArray（名单）;
的System.out.println（内部jsonObjList+ JSONArray），其中;
的for（int i = 0; I＆LT; jsonArray.length（）;我++）{
的JSONObject对象= jsonArray.getJSONObject（I） 字符串humidityString = object.getString（湿度）;
humidity.add（humidityString）;
字符串speedString = object.getString（速度）;
的System.out.println（内部speedString+ speedString）;
speed.add（speedString）; JSONArray weatherArray = object.getJSONArray（天气）;
的JSONObject weatherObj = weatherArray.getJSONObject（0）; 字符串iconString = weatherObj.getString（图标）;
最后弦乐iconURL =http://openweathermap.org/img/w/+ iconString +的.png;
图像=的getImage（iconURL）;
icon.add（图片）;
的System.out.println（内部图标+图标）;
字符串descriptionString = weatherObj.getString（说明）;
的System.out.println（内部descriptionString+ descriptionString）;
description.add（descriptionString）; JSONObject的TEMPOBJ = object.getJSONObject（TEMP）; 字符串minTemp = tempObj.getString（分）;
的System.out.println（内部minTemp+ minTemp）;
tempMin.add（minTemp）; 字符串maxTemp = tempObj.getString（最大）;
的System.out.println（内部maxTemp+ maxTemp）;
tempMax.add（maxTemp）;
} aAdapter =新ListViewCustomAdapter（WeatherReport.this，
纬度，经度的cityName，湿度，速度，图标，说明tempMin，tempMax）;
listView.setAdapter（aAdapter）; }赶上（例外五）{
Log.w（错误，e.getMessage（））;
}
返回null;
} 私人位图的getImage（字符串iconURL）{
在的InputStream = NULL;
BMP位图= NULL;
INT响应code = -1;
尝试{ 网址URL =新的URL（iconURL）; //HTTP：//192.xx.xx.xx/mypath/img1.jpg
HttpURLConnection的CON =（HttpURLConnection类）url.openConnection（）;
con.setDoInput（真）;
con.connect（）;
响应code = con.getResponse code（）;
如果（响应code == HttpURLConnection.HTTP_OK）{
//下载
在= con.getInputStream（）;
BMP = BitmapFactory.de codeStream（中）;
附寄（）;
} }赶上（例外前）{
Log.e（异常，ex.toString（））;
}
返回BMP;
} 私有类ListViewCustomAdapter延伸BaseAdapter {
上下文语境;
公共LayoutInflater吹气;
字符串的纬度，经度的cityName;
的String []湿度，速度，内容描述，minTemp，maxTemp;
ArrayList的＆LT;＆位图GT;位图;
公共ListViewCustomAdapter（上下文的背景下，字符串纬度，字符串经度，字符串的cityName，ArrayList的＆LT;弦乐＆GT;湿度，ArrayList的＆LT;弦乐＆GT;的速度，ArrayList的＆LT;位图＆GT;的形象，ArrayList的＆LT;弦乐＆GT;描述，ArrayList的＆LT;弦乐＆GT; tempMin，ArrayList的＆LT;弦乐＆GT; tempMax ）{
this.context =背景;
this.Latitude =纬度;
this.Longitude =经度;
this.cityName =的cityName;
this.bitmap =图标;
this.Humidity = humidity.toArray（新的String [humidity.size（）]）;
this.Speed = speed.toArray（新的String [speed.size（）]）;
this.Description1 = description.toArray（新的String [description.size（）]）;
this.minTemp = tempMin.toArray（新的String [tempMin.size（）]）;
this.maxTemp = tempMax.toArray（新的String [tempMax.size（）]）;
this.inflater =（LayoutInflater）上下文
.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
的System.out.println（内部ListViewCustomAdapter）;
} @覆盖
公众诠释的getCount（）{
返回0;
} @覆盖
公共对象的getItem（int i）以{
返回我;
} @覆盖
众长getItemId（int i）以{
返回我;
} 私有类持有人{
TextView的城市，MinTemp，MaxTemp，说明，速度，经纬度，湿度;
ImageView的云;
} @覆盖
公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
持有人持有人= NULL;
查看查看= convertView;
的System.out.println（内部getView）;
如果（查看== NULL）{
的System.out.println（内部如果getView）;
持有人=新的持有人（）;
convertView = inflater.inflate（R.layout.weather_report_single_item，NULL）;
holder.cloud =（ImageView的）findViewById（R.id.cloud）;
holder.City =（的TextView）findViewById（R.id.cityName）;
holder.MinTemp =（的TextView）findViewById（R.id.minTemp）;
holder.MaxTemp =（的TextView）findViewById（R.id.maxTemp）;
holder.Description =（的TextView）findViewById（R.id.weather）;
holder.Speed =（的TextView）findViewById（R.id.speed）;
holder.Latitude =（的TextView）findViewById（R.id.latitude）;
holder.Longitude =（的TextView）findViewById（R.id.longitude）;
holder.Humidity =（的TextView）findViewById（R.id.humidity）; convertView.setTag（保持器）;
}其他{
的System.out.println（内部其他getView）;
支架=（座）convertView.getTag（）;
holder.City.setText（的cityName）;
holder.Latitude.setText（纬度）;
holder.Longitude.setText（经度）;
holder.MaxTemp.setText（maxTemp [位置]）;
holder.MinTemp.setText（minTemp [位置]）;
holder.Speed.setText（速度[位置]）;
holder.Description.setText（说明1 [位置]）;
holder.cloud.setImageBitmap（bitmap.get（位置））;
} 返回convertView;
}
}
}
}类SingleRow {
串minTemp，maxTemp，速度，湿度;
位图IMG; SingleRow（字符串minTemp，字符串maxTemp，字符串的速度，字符串湿度，位图图片）{ this.maxTemp = maxTemp;
this.minTemp = minTemp;
this.speed =速度;
this.humidity =湿度;
this.img = IMG;
}}
解决方案
给出这将是显示的记录长度..给数组/集合长度的get计数法
检查低于code的适配器。补充意见还其中u犯错和建议，还
将异步任务onPostExecute方法列表视图适配器和所有。
EDITED
检查我HVE标有建议与 #### SUGGESTION
公共类WeatherReport延伸活动{ ListView控件的ListView;
// GPS_Location gpsObj;
// BaseAdapter aAdapter;
双经纬度;
位图图像; @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.listview_）;
ListView控件=（ListView控件）findViewById（R.id.listdata）;
// gpsObj =新GPS_Location（本）;
/ *
*为了测试我GVE静态纬度长期价值，因为我天玑的hve您
* GPS_Location类
* /
纬度= 23;
经度= 73;
的System.out.println（内部的onCreate（））;
字符串URL =http://api.openweathermap.org/data/2.5/forecast/daily?lat=
+纬度+＆放大器;经度=+经度+＆放大器; CNT = 14安培;模式= json的;
新的getJSON（）执行（URL）;
// listView.setAdapter（新BAdapter（本））;
} 私有类的getJSON扩展的AsyncTask＆LT;字符串，字符串，字符串＆GT; {
字符串的cityName;
串经纬度;
ArrayList的＆LT; SingleRow＆GT;清单;
ArrayList的＆LT;串GT;湿度;
ArrayList的＆LT;串GT;速度;
ArrayList的＆LT;串GT;天气;
ArrayList的＆LT;串GT; tempMin;
ArrayList的＆LT;串GT; tempMax;
ArrayList的＆LT;串GT;描述;
ArrayList的＆LT;串GT;图标; @覆盖
保护无效onPostExecute（字符串结果）{
// TODO自动生成方法存根
super.onPostExecute（结果）;
listView.setAdapter（新ListViewCustomAdapter（WeatherReport.this，
纬度，经度的cityName，湿度，速度，图标，
描述，tempMin，tempMax））;
} @覆盖
保护字符串doInBackground（字符串... PARAMS）{
字符串URL =参数[0];
湿度=新的ArrayList＆LT;串GT;（）;
速度=新的ArrayList＆LT;串GT;（）;
天气=新的ArrayList＆LT;串GT;（）;
tempMin =新的ArrayList＆LT;串GT;（）;
tempMax =新的ArrayList＆LT;串GT;（）;
图标=新的ArrayList＆LT;串GT;（）;
说明=新的ArrayList＆LT;串GT;（）;
字符串数据;
尝试{
HttpClient的hClient =新DefaultHttpClient（）;
HTTPGET hGet =新HTTPGET（URL）;
ResponseHandler所＆LT;串GT; rHandler =新BasicResponseHandler（）;
数据= hClient.execute（hGet，rHandler）;
的System.out.println（内部doInBackground数据+数据）;
JSONObject的jObj =新的JSONObject（数据）;
的System.out.println（内部背景jObj+ jObj）;
的JSONObject的JSONObject = jObj.getJSONObject（城市）;
的cityName = jsonObject.getString（名称）;
JSONObject的jObjCoOrd = jsonObject.getJSONObject（坐标）;
纬度= jObjCoOrd.getString（纬度）;
的System.out.println（内部纬度+纬度）;
经度= jObjCoOrd.getString（LON）;
的System.out.println（内部经度+经度）; JSONArray jsonArray = jObj.getJSONArray（名单）;
的System.out.println（内部jsonObjList+ JSONArray），其中;
的for（int i = 0; I＆LT; jsonArray.length（）;我++）{
的JSONObject对象= jsonArray.getJSONObject（I） 字符串humidityString = object.getString（湿度）;
humidity.add（humidityString）;
字符串speedString = object.getString（速度）;
的System.out.println（内部speedString+ speedString）;
speed.add（speedString）; JSONArray weatherArray = object.getJSONArray（天气）;
的JSONObject weatherObj = weatherArray.getJSONObject（0）; 字符串iconString = weatherObj.getString（图标）;
最后弦乐iconURL =http://openweathermap.org/img/w/
+ iconString +巴纽;
// #### SUGGESTION //不要下载图像或文件这样的
//显示图像使用ImageLoader的延迟加载库
//可用 // https://github.com/nostra13/Android-Universal-Image-Loader/tree/master/sample //评论图片下载相关的线之下，一旦
//检查 //图像=的getImage（iconURL）;
// icon.add（图片）; //我HVE这里做其他的变化是converty位阵列
//列表的字符串，的hve图片网址无效位
icon.add（iconURL）;
的System.out.println（内部图标+图标）;
字符串descriptionString = weatherObj
.getString（说明）;
的System.out.println（内部descriptionString
+ descriptionString）;
description.add（descriptionString）; JSONObject的TEMPOBJ = object.getJSONObject（TEMP）; 字符串minTemp = tempObj.getString（分）;
的System.out.println（内部minTemp+ minTemp）;
tempMin.add（minTemp）; 字符串maxTemp = tempObj.getString（最大）;
的System.out.println（内部maxTemp+ maxTemp）;
tempMax.add（maxTemp）;
} //如果妳做任何用户界面相关的变化在这里下面的异常会来
//因此需要在移动onPostExecute UI变化 // android.view.ViewRootImpl $ CalledFromWrongThreadException：
//只有创建一个视图可以分层原来的线程
//触摸自己的看法。 // listView.setAdapter（新ListViewCustomAdapter（
// WeatherReport.this，纬度，经度的cityName，
//湿度，速度，图标，说明tempMin，tempMax））; }赶上（例外五）{
Log.w（错误，e.getMessage（））;
}
返回null;
} 私人位图的getImage（字符串iconURL）{
在的InputStream = NULL;
BMP位图= NULL;
INT响应code = -1;
尝试{ 网址URL =新的URL（iconURL）; //HTTP：//192.xx.xx.xx/mypath/img1.jpg
HttpURLConnection的CON =（HttpURLConnection类）网址
.openConnection（）;
con.setDoInput（真）;
con.connect（）;
响应code = con.getResponse code（）;
如果（响应code == HttpURLConnection.HTTP_OK）{
// 下载
在= con.getInputStream（）;
BMP = BitmapFactory.de codeStream（中）;
附寄（）;
} }赶上（例外前）{
Log.e（异常，ex.toString（））;
} 返回BMP;
} 私有类ListViewCustomAdapter延伸BaseAdapter {
上下文语境;
公共LayoutInflater吹气;
字符串的纬度，经度的cityName;
的String []湿度，速度，内容描述，minTemp，maxTemp;
ArrayList的＆LT;串GT;位图;
INT totalDisplayDatasize = 0; 公共ListViewCustomAdapter（上下文的背景下，字符串纬度，
经度字符串，字符串的cityName，
ArrayList的＆LT;串GT;湿度的ArrayList＆LT;串GT;速度，
ArrayList的＆LT;串GT;图像，ArrayList的＆LT;串GT;描述，
ArrayList的＆LT;串GT; tempMin，ArrayList的＆LT;串GT; tempMax）{
this.context =背景;
this.Latitude =纬度;
this.Longitude =经度;
this.cityName =的cityName;
this.bitmap =图标;
this.Humidity = humidity.toArray（新的String [humidity.size（）]）;
this.Speed = speed.toArray（新的String [speed.size（）]）;
this.Description1 = description.toArray（新的String [简介
。尺寸（）]）;
this.minTemp = tempMin.toArray（新的String [tempMin.size（）]）;
this.maxTemp = tempMax.toArray（新的String [tempMax.size（）]）;
// /建议：没有必要建立LayoutInflater实例
//构造
// this.inflater =（LayoutInflater）上下文
// .getSystemService（Context.LAYOUT_INFLATER_SERVICE）; / **
*用于计数设置总数据长度
* * /
如果（this.Humidity！= NULL）
totalDisplayDatasize = this.Humidity.length;
的System.out.println（内部ListViewCustomAdapter）;
} @覆盖
公众诠释的getCount（）{
//这可能是其中一个原因，不显示listview.set
//为计数总数据长度
返回totalDisplayDatasize;
} @覆盖
公共对象的getItem（int i）以{
返回我;
} @覆盖
众长getItemId（int i）以{
返回我;
} 私有类持有人{
TextView的城市，MinTemp，MaxTemp，说明，速度，纬度，
经度，湿度;
ImageView的云;
} @覆盖
公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
持有人持有人= NULL;
查看查看= convertView;
的System.out.println（内部getView）;
如果（查看== NULL）{
的System.out.println（内部如果getView）;
持有人=新的持有人（）;
// /没有必要创建LayoutInflater实例
//构造 convertView = LayoutInflater.from（this.context）.inflate（
R.layout.list_row_data，NULL）;
//从convertview.findviewbyid，而不是创建实例
//直接使用findViewById
// holder.cloud =（ImageView的）convertView
// .findViewById（R.id.cloud）;
// holder.City =（TextView中）convertView
// .findViewById（R.id.cityName）;
holder.MinTemp =（TextView中）convertView
.findViewById（R.id.minTemp）;
holder.MaxTemp =（TextView中）convertView
.findViewById（R.id.maxTemp）;
holder.Description =（TextView中）convertView
.findViewById（R.id.weather）;
holder.Speed =（TextView中）convertView
.findViewById（R.id.speed）;
holder.Latitude =（TextView中）convertView
.findViewById（R.id.latitude）;
holder.Longitude =（TextView中）convertView
.findViewById（R.id.longitude）; convertView.setTag（保持器）;
}其他{
的System.out.println（内部其他getView）;
支架=（座）convertView.getTag（）; } //这里的每一行设置的值 // holder.City.setText（的cityName）;
holder.Latitude.setText（纬度：+纬度）;
holder.Longitude.setText（龙+经度）;
holder.MaxTemp.setText（maxTemp：+ maxTemp [位置]）;
holder.MinTemp.setText（minTemp：+ minTemp [位置]）;
holder.Speed.setText（速度：+速度[位置]）;
holder.Description.setText（描述：
+说明1 [位置]）;
// #### SUGGESTION //要显示的图像使用ImageLoader的，将下载的图像中
//背景并显示
// https://github.com/nostra13/Android-Universal-Image-Loader/tree/master/sample // holder.cloud.setImageBitmap（bitmap.get（位置））;
返回convertView;
}
}
}
}类SingleRow {
串minTemp，maxTemp，速度，湿度;
位图IMG; SingleRow（字符串minTemp，字符串maxTemp，字符串的速度，字符串湿度，
位图图片）{ this.maxTemp = maxTemp;
this.minTemp = minTemp;
this.speed =速度;
this.humidity =湿度;
this.img = IMG;
}}
list_row_data.xml
＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=http://schemas.android.com/apk/res/android
机器人：layout_width =match_parent机器人：layout_margin =5DP
机器人：layout_height =WRAP_CONTENT
机器人：背景=＃FFFFFF
机器人：方向=垂直＆GT; ＆LT;的TextView
机器人：ID =@ + ID /速度
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT
机器人：文字颜色=＃ffff8800/＆GT; ＆LT;的TextView
机器人：ID =@ + ID /全天候
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT
机器人：文字颜色=＃ffff8800/＆GT; ＆LT;的TextView
机器人：ID =@ + ID /纬度
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT
机器人：文字颜色=＃ffff8800/＆GT; ＆LT;的TextView
机器人：ID =@ + ID /经度
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT
机器人：文字颜色=＃ffff8800/＆GT; ＆LT;的TextView
机器人：ID =@ + ID / minTemp
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT
机器人：文字颜色=＃ffff8800/＆GT; ＆LT;的TextView
机器人：ID =@ + ID / maxTemp
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT
机器人：文字颜色=＃ffff8800/＆GT;＆LT; / LinearLayout中＆GT;
listview_.xml
＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=http://schemas.android.com/apk/res/android
机器人：layout_width =match_parent
机器人：layout_height =WRAP_CONTENT
机器人：方向=垂直＆GT; ＆LT; ListView控件
机器人：ID =@ + ID /的ListData
机器人：layout_width =FILL_PARENT
机器人：layout_height =FILL_PARENT/＆GT;＆LT; / LinearLayout中＆GT;
i didn't see any data in listView i get all data from web-service but i didn't see it inside ListView. I get flow and i understand it never go inside getView() method Please explain me what's wrong going in that code and suggest me best-one.
public class WeatherReport extends Activity {
ListView listView;
GPS_Location gpsObj;
BaseAdapter aAdapter;
double Latitude, Longitude;
Bitmap image;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.weather_report);
listView = (ListView) findViewById(R.id.listView);
gpsObj = new GPS_Location(this);
Latitude = gpsObj.getLatitude();
Longitude = gpsObj.getLongitude();
System.out.println("Inside onCreate() ");
String Url = "http://api.openweathermap.org/data/2.5/forecast/daily?lat=" + Latitude + "&lon=" + Longitude + "&cnt=14&mode=json";
new getJSON().execute(Url);
// listView.setAdapter(new BAdapter(this));
}
private class getJSON extends AsyncTask<String, String, String> {
String cityName;
String Latitude, Longitude;
ArrayList<SingleRow> list;
ArrayList<String> humidity;
ArrayList<String> speed;
ArrayList<String> weather;
ArrayList<String> tempMin;
ArrayList<String> tempMax;
ArrayList<String> description;
ArrayList<Bitmap> icon;
@Override
protected String doInBackground(String... params) {
String Url = params[0];
humidity = new ArrayList<String>();
speed = new ArrayList<String>();
weather = new ArrayList<String>();
tempMin = new ArrayList<String>();
tempMax = new ArrayList<String>();
icon = new ArrayList<Bitmap>();
description = new ArrayList<String>();
String data;
try {
HttpClient hClient = new DefaultHttpClient();
HttpGet hGet = new HttpGet(Url);
ResponseHandler<String> rHandler = new BasicResponseHandler();
data = hClient.execute(hGet, rHandler);
System.out.println("Inside doInBackground data " + data);
JSONObject jObj = new JSONObject(data);
System.out.println("Inside Background jObj " + jObj);
JSONObject jsonObject = jObj.getJSONObject("city");
cityName = jsonObject.getString("name");
JSONObject jObjCoOrd = jsonObject.getJSONObject("coord");
Latitude = jObjCoOrd.getString("lat");
System.out.println("Inside Latitude " + Latitude);
Longitude = jObjCoOrd.getString("lon");
System.out.println("Inside Longitude " + Longitude);
JSONArray jsonArray = jObj.getJSONArray("list");
System.out.println("Inside jsonObjList " + jsonArray);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject object = jsonArray.getJSONObject(i);
String humidityString = object.getString("humidity");
humidity.add(humidityString);
String speedString = object.getString("speed");
System.out.println("Inside speedString " + speedString);
speed.add(speedString);
JSONArray weatherArray = object.getJSONArray("weather");
JSONObject weatherObj = weatherArray.getJSONObject(0);
String iconString = weatherObj.getString("icon");
final String iconURL = "http://openweathermap.org/img/w/" + iconString + ".png";
image = getImage(iconURL);
icon.add(image);
System.out.println("Inside icon " + icon);
String descriptionString = weatherObj.getString("description");
System.out.println("Inside descriptionString " + descriptionString);
description.add(descriptionString);
JSONObject tempObj = object.getJSONObject("temp");
String minTemp = tempObj.getString("min");
System.out.println("Inside minTemp " + minTemp);
tempMin.add(minTemp);
String maxTemp = tempObj.getString("max");
System.out.println("Inside maxTemp " + maxTemp);
tempMax.add(maxTemp);
}
aAdapter = new ListViewCustomAdapter(WeatherReport.this,
Latitude, Longitude, cityName, humidity, speed, icon, description, tempMin, tempMax);
listView.setAdapter(aAdapter);
} catch (Exception e) {
Log.w("Error", e.getMessage());
}
return null;
}
private Bitmap getImage(String iconURL) {
InputStream in = null;
Bitmap bmp = null;
int responseCode = -1;
try {
URL url = new URL(iconURL);//"http://192.xx.xx.xx/mypath/img1.jpg
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setDoInput(true);
con.connect();
responseCode = con.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
//download
in = con.getInputStream();
bmp = BitmapFactory.decodeStream(in);
in.close();
}
} catch (Exception ex) {
Log.e("Exception", ex.toString());
}
return bmp;
}
private class ListViewCustomAdapter extends BaseAdapter {
Context context;
public LayoutInflater inflater;
String Latitude, Longitude, cityName;
String[] Humidity, Speed, Description1, minTemp, maxTemp ;
ArrayList<Bitmap> bitmap;
public ListViewCustomAdapter(Context context, String latitude, String longitude, String cityName, ArrayList<String> humidity, ArrayList<String> speed, ArrayList<Bitmap> image, ArrayList<String> description, ArrayList<String> tempMin, ArrayList<String> tempMax) {
this.context = context;
this.Latitude = latitude;
this.Longitude = longitude;
this.cityName = cityName;
this.bitmap = icon;
this.Humidity = humidity.toArray(new String[humidity.size()]);
this.Speed = speed.toArray(new String[speed.size()]);
this.Description1 = description.toArray(new String[description.size()]);
this.minTemp = tempMin.toArray(new String[tempMin.size()]);
this.maxTemp = tempMax.toArray(new String[tempMax.size()]);
this.inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
System.out.println("Inside ListViewCustomAdapter ");
}
@Override
public int getCount() {
return 0;
}
@Override
public Object getItem(int i) {
return i;
}
@Override
public long getItemId(int i) {
return i;
}
private class Holder {
TextView City, MinTemp, MaxTemp, Description, Speed, Latitude, Longitude, Humidity;
ImageView cloud;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Holder holder= null;
View view = convertView;
System.out.println("Inside getView");
if(view== null){
System.out.println("Inside if getView");
holder = new Holder();
convertView = inflater.inflate(R.layout.weather_report_single_item, null);
holder.cloud = (ImageView) findViewById(R.id.cloud);
holder.City = (TextView) findViewById(R.id.cityName);
holder.MinTemp= (TextView) findViewById(R.id.minTemp);
holder.MaxTemp= (TextView) findViewById(R.id.maxTemp);
holder.Description=(TextView) findViewById(R.id.weather);
holder.Speed =(TextView) findViewById(R.id.speed);
holder.Latitude = (TextView) findViewById(R.id.latitude);
holder.Longitude= (TextView) findViewById(R.id.longitude);
holder.Humidity= (TextView) findViewById(R.id.humidity);
convertView.setTag(holder);
}else{
System.out.println("Inside else getView");
holder = (Holder) convertView.getTag();
holder.City.setText(cityName);
holder.Latitude.setText(Latitude);
holder.Longitude.setText(Longitude);
holder.MaxTemp.setText(maxTemp[position]);
holder.MinTemp.setText(minTemp[position]);
holder.Speed.setText(Speed[position]);
holder.Description.setText(Description1[position]);
holder.cloud.setImageBitmap(bitmap.get(position));
}
return convertView;
}
}
}
}
class SingleRow {
String minTemp, maxTemp, speed, humidity;
Bitmap img;
SingleRow(String minTemp, String maxTemp, String speed, String humidity, Bitmap img) {
this.maxTemp = maxTemp;
this.minTemp = minTemp;
this.speed = speed;
this.humidity = humidity;
this.img = img;
}
}
解决方案
give length of the records which is going to be display .. give array/collection length in get count method
Check the below code for adapter . Added comment also where u made mistakes and suggestions also
Set the listview adapter and all in async task onPostExecute method.
EDITED
Check the suggestions i hve marked with with #### SUGGESTION
public class WeatherReport extends Activity {
ListView listView;
// GPS_Location gpsObj;
// BaseAdapter aAdapter;
double Latitude, Longitude;
Bitmap image;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview_);
listView = (ListView) findViewById(R.id.listdata);
// gpsObj = new GPS_Location(this);
/*
* For testing i gve static lat long values as i dnt hve your
* GPS_Location class
*/
Latitude = 23;
Longitude = 73;
System.out.println("Inside onCreate() ");
String Url = "http://api.openweathermap.org/data/2.5/forecast/daily?lat="
+ Latitude + "&lon=" + Longitude + "&cnt=14&mode=json";
new getJSON().execute(Url);
// listView.setAdapter(new BAdapter(this));
}
private class getJSON extends AsyncTask<String, String, String> {
String cityName;
String Latitude, Longitude;
ArrayList<SingleRow> list;
ArrayList<String> humidity;
ArrayList<String> speed;
ArrayList<String> weather;
ArrayList<String> tempMin;
ArrayList<String> tempMax;
ArrayList<String> description;
ArrayList<String> icon;
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
listView.setAdapter(new ListViewCustomAdapter(WeatherReport.this,
Latitude, Longitude, cityName, humidity, speed, icon,
description, tempMin, tempMax));
}
@Override
protected String doInBackground(String... params) {
String Url = params[0];
humidity = new ArrayList<String>();
speed = new ArrayList<String>();
weather = new ArrayList<String>();
tempMin = new ArrayList<String>();
tempMax = new ArrayList<String>();
icon = new ArrayList<String>();
description = new ArrayList<String>();
String data;
try {
HttpClient hClient = new DefaultHttpClient();
HttpGet hGet = new HttpGet(Url);
ResponseHandler<String> rHandler = new BasicResponseHandler();
data = hClient.execute(hGet, rHandler);
System.out.println("Inside doInBackground data " + data);
JSONObject jObj = new JSONObject(data);
System.out.println("Inside Background jObj " + jObj);
JSONObject jsonObject = jObj.getJSONObject("city");
cityName = jsonObject.getString("name");
JSONObject jObjCoOrd = jsonObject.getJSONObject("coord");
Latitude = jObjCoOrd.getString("lat");
System.out.println("Inside Latitude " + Latitude);
Longitude = jObjCoOrd.getString("lon");
System.out.println("Inside Longitude " + Longitude);
JSONArray jsonArray = jObj.getJSONArray("list");
System.out.println("Inside jsonObjList " + jsonArray);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject object = jsonArray.getJSONObject(i);
String humidityString = object.getString("humidity");
humidity.add(humidityString);
String speedString = object.getString("speed");
System.out.println("Inside speedString " + speedString);
speed.add(speedString);
JSONArray weatherArray = object.getJSONArray("weather");
JSONObject weatherObj = weatherArray.getJSONObject(0);
String iconString = weatherObj.getString("icon");
final String iconURL = "http://openweathermap.org/img/w/"
+ iconString + ".png";
// #### SUGGESTION
// Do not Download images or files like this
// to display images use imageloader lazy loading library is
// available
// https://github.com/nostra13/Android-Universal-Image-Loader/tree/master/sample
// Comment image downloading related below line and once
// check
// image = getImage(iconURL);
// icon.add(image);
// here other change i hve made is converty bitmap array
// list to String which will hve images url not bitmap
icon.add(iconURL);
System.out.println("Inside icon " + icon);
String descriptionString = weatherObj
.getString("description");
System.out.println("Inside descriptionString "
+ descriptionString);
description.add(descriptionString);
JSONObject tempObj = object.getJSONObject("temp");
String minTemp = tempObj.getString("min");
System.out.println("Inside minTemp " + minTemp);
tempMin.add(minTemp);
String maxTemp = tempObj.getString("max");
System.out.println("Inside maxTemp " + maxTemp);
tempMax.add(maxTemp);
}
// If u do any ui related changes here below exception will come
// so need to move ui changes in onPostExecute
// android.view.ViewRootImpl$CalledFromWrongThreadException:
// Only the original thread that created a view hierarchy can
// touch its views.
// listView.setAdapter(new ListViewCustomAdapter(
// WeatherReport.this, Latitude, Longitude, cityName,
// humidity, speed, icon, description, tempMin, tempMax));
} catch (Exception e) {
Log.w("Error", e.getMessage());
}
return null;
}
private Bitmap getImage(String iconURL) {
InputStream in = null;
Bitmap bmp = null;
int responseCode = -1;
try {
URL url = new URL(iconURL);// "http://192.xx.xx.xx/mypath/img1.jpg
HttpURLConnection con = (HttpURLConnection) url
.openConnection();
con.setDoInput(true);
con.connect();
responseCode = con.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
// download
in = con.getInputStream();
bmp = BitmapFactory.decodeStream(in);
in.close();
}
} catch (Exception ex) {
Log.e("Exception", ex.toString());
}
return bmp;
}
private class ListViewCustomAdapter extends BaseAdapter {
Context context;
public LayoutInflater inflater;
String Latitude, Longitude, cityName;
String[] Humidity, Speed, Description1, minTemp, maxTemp;
ArrayList<String> bitmap;
int totalDisplayDatasize = 0;
public ListViewCustomAdapter(Context context, String latitude,
String longitude, String cityName,
ArrayList<String> humidity, ArrayList<String> speed,
ArrayList<String> image, ArrayList<String> description,
ArrayList<String> tempMin, ArrayList<String> tempMax) {
this.context = context;
this.Latitude = latitude;
this.Longitude = longitude;
this.cityName = cityName;
this.bitmap = icon;
this.Humidity = humidity.toArray(new String[humidity.size()]);
this.Speed = speed.toArray(new String[speed.size()]);
this.Description1 = description.toArray(new String[description
.size()]);
this.minTemp = tempMin.toArray(new String[tempMin.size()]);
this.maxTemp = tempMax.toArray(new String[tempMax.size()]);
// /suggestion : No need to create LayoutInflater instance in
// constructor
// this.inflater = (LayoutInflater) context
// .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
/**
* set total data length for count
* */
if (this.Humidity != null)
totalDisplayDatasize = this.Humidity.length;
System.out.println("Inside ListViewCustomAdapter ");
}
@Override
public int getCount() {
// this could be one of the reason for not showing listview.set
// total data length for count
return totalDisplayDatasize;
}
@Override
public Object getItem(int i) {
return i;
}
@Override
public long getItemId(int i) {
return i;
}
private class Holder {
TextView City, MinTemp, MaxTemp, Description, Speed, Latitude,
Longitude, Humidity;
ImageView cloud;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
Holder holder = null;
View view = convertView;
System.out.println("Inside getView");
if (view == null) {
System.out.println("Inside if getView");
holder = new Holder();
// / No need to create LayoutInflater instance in
// constructor
convertView = LayoutInflater.from(this.context).inflate(
R.layout.list_row_data, null);
// Create instance from convertview.findviewbyid instead of
// directly using findViewById
// holder.cloud = (ImageView) convertView
// .findViewById(R.id.cloud);
// holder.City = (TextView) convertView
// .findViewById(R.id.cityName);
holder.MinTemp = (TextView) convertView
.findViewById(R.id.minTemp);
holder.MaxTemp = (TextView) convertView
.findViewById(R.id.maxTemp);
holder.Description = (TextView) convertView
.findViewById(R.id.weather);
holder.Speed = (TextView) convertView
.findViewById(R.id.speed);
holder.Latitude = (TextView) convertView
.findViewById(R.id.latitude);
holder.Longitude = (TextView) convertView
.findViewById(R.id.longitude);
convertView.setTag(holder);
} else {
System.out.println("Inside else getView");
holder = (Holder) convertView.getTag();
}// set values here for each row
// holder.City.setText(cityName);
holder.Latitude.setText("Lat : " + Latitude);
holder.Longitude.setText("Long : " + Longitude);
holder.MaxTemp.setText("maxTemp : " + maxTemp[position]);
holder.MinTemp.setText("minTemp : " + minTemp[position]);
holder.Speed.setText("Speed : " + Speed[position]);
holder.Description.setText("Description : "
+ Description1[position]);
// #### SUGGESTION
// TO display image use ImageLoader which will download image in
// background and will display
// https://github.com/nostra13/Android-Universal-Image-Loader/tree/master/sample
// holder.cloud.setImageBitmap(bitmap.get(position));
return convertView;
}
}
}
}
class SingleRow {
String minTemp, maxTemp, speed, humidity;
Bitmap img;
SingleRow(String minTemp, String maxTemp, String speed, String humidity,
Bitmap img) {
this.maxTemp = maxTemp;
this.minTemp = minTemp;
this.speed = speed;
this.humidity = humidity;
this.img = img;
}
}
list_row_data.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_margin="5dp"
android:layout_height="wrap_content"
android:background="#ffffff"
android:orientation="vertical" >
<TextView
android:id="@+id/speed"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffff8800" />
<TextView
android:id="@+id/weather"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffff8800" />
<TextView
android:id="@+id/latitude"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffff8800" />
<TextView
android:id="@+id/longitude"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffff8800" />
<TextView
android:id="@+id/minTemp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffff8800" />
<TextView
android:id="@+id/maxTemp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#ffff8800" />
</LinearLayout>
listview_.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<ListView
android:id="@+id/listdata"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
这篇关于无法看到的ListView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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