Android之使用Android-query框架开发实战（二）

String url = "http://www.google.com/uds/GnewsSearch?q=Obama&v=1.0";  
  aq.ajax(url, JSONObject.class, new AjaxCallback<JSONObject>() {
    @Override
    public void callback(String url, JSONObject json, AjaxStatus status) {      
      if(json != null){
        //successful ajax call, show status code and json content
        Toast.makeText(aq.getContext(), status.getCode() + ":" + json.toString(), Toast.LENGTH_LONG).show();      
      }else{
        //ajax error, show error code
        Toast.makeText(aq.getContext(), "Error:" + status.getCode(), Toast.LENGTH_LONG).show();
      }
    }
 }); 

public void asyncJson(){  
  //perform a Google search in just a few lines of code  
  String url = "http://www.google.com/uds/GnewsSearch?q=Obama&v=1.0";    
  aq.ajax(url, JSONObject.class, this, "jsonCallback");  
}
public void jsonCallback(String url, JSONObject json, AjaxStatus status){
  
  if(json != null){    
    //successful ajax call   
  }else{   
    //ajax error
  }
} 

public void xml_ajax(){   
  String url = "https://picasaweb.google.com/data/feed/base/featured?max-results=8";    
  aq.ajax(url, XmlDom.class, this, "picasaCb");   
}

public void picasaCb(String url, XmlDom xml, AjaxStatus status){
 // 返回一系列为entry的结点,并把其add进list
  List<XmlDom> entries = xml.tags("entry");    
  List<String> titles = new ArrayList<String>();
  
  String imageUrl = null;
  
  for(XmlDom entry: entries){
    titles.add(entry.text("title")); //循环把第一个结点为title的文本放进title
    imageUrl = entry.tag("content", "type", "image/jpeg").attr("src");//把第一个结点为content,属性为type,属性值为image/jpeg的src属性值赋予给imageUri
  }
    
  aq.id(R.id.image).image(imageUrl);
}   

String url = "https://picasaweb.google.com/data/feed/base/featured?max-results=16";    
File ext = Environment.getExternalStorageDirectory();
File target = new File(ext, "aquery/myfolder/photos.xml");    

aq.progress(R.id.progress).download(url, target, new AjaxCallback<File>(){
  
  public void callback(String url, File file, AjaxStatus status) {
    
    if(file != null){
      showResult("File:" + file.length() + ":" + file, status);
    }else{
      showResult("Failed", status);
    }
  }
 });

private void aync_multipart(){  
  String url = "https://graph.facebook.com/me/photos";  
  Map<String, Object> params = new HashMap<String, Object>();
  params.put("message", "Message");  
  //Simply put a byte[] to the params, AQuery will detect it and treat it as a multi-part post
  byte[] data = getImageData();
  params.put("source", data);  
  //Alternatively, put a File or InputStream instead of byte[]
  //File file = getImageFile();   
  //params.put("source", file);  
  AQuery aq = new AQuery(getApplicationContext());
  aq.auth(handle).ajax(url, params, JSONObject.class, this, "photoCb");  
}

String url = "http://www.google.com";
// 返回最近15分钟内的缓存副本,如果expire为-1,内容将会立即更新且缓存
long expire = 15 * 60 * 1000;
aq.ajax(url, String.class, expire, new AjaxCallback<String>() {
 @Override
 public void callback(String url, String html, AjaxStatus status) {  
  showResult(html);
 }  
});

public void callback(String url, JSONObject json, AjaxStatus status) {
 
  if(json != null){
    if("1".equals(json.optString("status"))){
      //do something
    }else{
      // 不缓存
      status.invalidate();
    }
  }
}

String url = "http://www.google.com/uds/GnewsSearch?q=Obama&v=1.0";  
AjaxCallback<JSONObject> cb = new AjaxCallback<JSONObject>();   
cb.url(url).type(JSONObject.class);   
aq.sync(cb);
JSONObject jo = cb.getResult();
AjaxStatus status = cb.getStatus();