android通过google api获取天气信息示例
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android通过google api获取天气信息
public class weatheractivity extends activity {
private textview txcity;
private button btnsearch;
private handler weatherhandler;
private dialog progressdialog;
private timer timer;
/** called when the activity is first created. */
@override
public void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.main);
timer = new timer();
txcity = (textview)findviewbyid(r.id.txcity);
btnsearch = (button)findviewbyid(r.id.btnsearch);
progressdialog = new alertdialog.builder(this)
.settitle("读取数据中")
.setmessage("正在加载数据，请稍等")
.create();
weatherhandler = new handler(){
public void handlemessage(message msg){
final string cityname = txcity.gettext().tostring().trim();
searchweather(cityname);
progressdialog.hide();
}
};
btnsearch.setonclicklistener(new onclicklistener() {
@override
public void onclick(view v) {
progressdialog.show();
timer.schedule(new timertask() {
@override
public void run() {
message msg = new message();
msg.settarget(weatherhandler);
msg.sendtotarget();
}
},100);
}
});
}
private void searchweather(string city){
saxparserfactory spf = saxparserfactory.newinstance();
try {
saxparser sp = spf.newsaxparser();
xmlreader reader = sp.getxmlreader();
xmlhandler handler = new xmlhandler();
reader.setcontenthandler(handler);
url url = new url("http://www.google.com/ig/api?hl=zh-cn&weather="+urlencoder.encode(city));
inputstream is = url.openstream();
inputstreamreader isr = new inputstreamreader(is, "gbk");
inputsource source = new inputsource(isr);
reader.parse(source);
list<weather>weatherlist = handler.getweatherlist();
tablelayout table = (tablelayout)findviewbyid(r.id.table);
table.removeallviews();
for(weather weather:weatherlist){
tablerow row = new tablerow(this);
row.setlayoutparams(new layoutparams(layoutparams.fill_parent,layoutparams.wrap_content));
row.setgravity(gravity.center_vertical);
imageview img = new imageview(this);
img.setimagedrawable(loadimage(weather.getimageurl()));
img.setminimumheight(80);
row.addview(img);
textview day = new textview(this);
day.settext(weather.getday());
day.setgravity(gravity.center_horizontal);
row.addview(day);
textview temp = new textview(this);
temp.settext(weather.getlowtemp()+"℃-"+weather.gethightemp()+"℃");
temp.setgravity(gravity.center_horizontal);
row.addview(temp);
textview condition = new textview(this);
condition.settext(weather.getcondition());
condition.setgravity(gravity.center_horizontal);
row.addview(condition);
table.addview(row);
}
} catch (exception e) {
e.printstacktrace();
new alertdialog.builder(this)
.settitle("解析错误")
.setmessage("获取天气数据失败，请稍候再试。")
.setnegativebutton("确定", null)
.show();
}
}
private drawable loadimage(string imageurl) {
try {
return drawable.createfromstream((inputstream) new url("http://www.google.com/"+imageurl).getcontent(), "test");
} catch (malformedurlexception e) {
e.printstacktrace();
} catch (ioexception e) {
e.printstacktrace();
}
return null;
}
}
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