随手记(1)

/**
检测网络状态
*/
private boolean isNetWorkAvaiable(){

mConnMan = (ConnectivityManager)getSystemService(CONNECTIVITY_SERVICE);
NetWorkInfo info = mConnMan.getActiveNetWork();
if(info==null){

    return false;
    }
reurn info.isContected();
}
/***
服务停掉自身
**/
stopSelf();
/**
轮询的方式(handler)
**/
private Handler handler = new Handler(){
    public void handleMessage(Message msg){
        switch(msg.what){
        if(isRunning){
            
            Message msg = obtainMessage(LOOP);
            sendMessagedelayed(msg,30*1000);
                }
        
        }
    
    }

}
/***在androidmanifest.xml中注册service时,有一个android:process属性,如果这个属性以"."开头,则为此服务开启一个 
全局的独立进程,如果以":"开头则为此服务开启一个为此应用私有的独立进程
*/
/**
取得版本的名字
**/
public static String getVerSionName(){
    String versionName="";
    try{

        versionName = context.getPackageManager().getPackageInfo(context.getPackageName(),1
    )
    catch(PackageManager.NameNotFoundException e){
            
        }
    }
}
public static <T> T toObject(String result, Class<T> clazz)
  {
    if ((clazz == null) || (StringUtil.isEmpty(result))) {
      return null;
    }
    try
    {
      Gson gson = new Gson();
      return gson.fromJson(result, clazz);
    } catch (Exception e) {
      Log.e("JSON 转换异常!", e);
      try {
        return clazz.newInstance();
      } catch (IllegalAccessException e1) {
        Log.e("toObject IllegalAccessException 实例化异常", e1);
      } catch (InstantiationException e1) {
        Log.e("toObject IllegalAccessException 实例化异常", e1);
      }
    }
    return null;
  }

public void releae(){

if(this.request!=null){

this.request.abort();
    }
}

/**
上传文件
/****
从对话框列表中移除dialog

*/
private static HashMap<String,Dialog> dialogs = new HashMap();
public static void dismissAlert(Context context){
    Dialog dialog = (Dialog)dialogs.get(context.toString());
    if(dialog != null&&dialog.isShowing()){
        dialog.dismiss();
        dialogs.remove(context.toString());
    }

}

/***
根据uri下载安装软件
*/

private void setUp(String httpUrl){

    Uri uri = Uri.parse(httpUrl);
    Intent intent = new Intent(Intent.ACTION_VIEW,httpUrl);
    startActivity();
}

**/
public
String uploadFile(String upUrl, String filePath) { String end = "\r\n"; String twoHyphens = "--"; String boundary = "*****"; String fileName = filePath.substring(filePath.lastIndexOf("/") + 1); try { URL url = new URL(upUrl); HttpURLConnection con = (HttpURLConnection)url.openConnection(); con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false); con.setRequestMethod("POST"); con.setRequestProperty("Connection", "Keep-Alive"); con.setRequestProperty("Charset", "UTF-8"); con.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary); DataOutputStream ds = new DataOutputStream(con.getOutputStream()); ds.writeBytes(twoHyphens + boundary + end); ds.writeBytes("Content-Disposition: form-data; name=\"file\";filename=\"" + fileName + "\"" + end); ds.writeBytes(end); InputStream fStream = new FileInputStream(new File(filePath)); int bufferSize = 1024; byte[] buffer = new byte[bufferSize]; int length = -1; while ((length = fStream.read(buffer)) != -1) { ds.write(buffer, 0, length); } ds.writeBytes(end); ds.writeBytes(twoHyphens + boundary + twoHyphens + end); fStream.close(); ds.flush(); InputStream is = con.getInputStream(); StringBuffer b = new StringBuffer(); int ch; while ((ch = is.read()) != -1) { int ch; b.append((char)ch); } ds.close(); return b.toString(); } catch (Exception e) { e.printStackTrace(); }return ""; }
/***
将从网络上获得的输入流进行解析
**/

public MenuEntity parse(InputStream stream){
    try{
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    Element root = docuemnt.getDocumentElement();
    return traverse(root);
    }
    catch (Exception ex) {
            ex.printStackTrace();
            Log.e("解析xml异常,异常为:" + ex);
        }

        return null;

}
/****
下载文件

**/



private void download(String url ,File file){
    FileOutputStream f = createOpustream(file);
    try{
        
        Inputstream in = download(url);
        if (in == null)
                return;
            int fix = 0;

            byte[] buffer = new byte[1024];
            int len = 0;
        while((len = in.read(buffer)>0)){

        f.write(buffer,0,len);
        fix +=  len;
        
        }
    
    }
    catch (MalformedURLException e) {
            // e.printStackTrace();
            Log.e(e.getMessage(), e);
            deleteFile(file);
        } catch (IOException e) {
            // e.printStackTrace();
            Log.e(e.getMessage(), e);
            deleteFile(file);
        } finally {
            // Closes this stream.
            StreamUtil.closeSilently(f);
            if (conn != null) {
                conn.disconnect();
            }
        }

}

private FileOutputStream createOpustream(File file){
    try
    {
        FileOutputStream out = new FileOutputstream(file);
    }catch(Exception e){
        deleteFile(file);
    }

}

private void deleteFile(File file){

    if(file.exits()&&file!=null){
        file.delete();
    }
}

private Inputstream download(String url){

    try{
        URL u = new URL(url);
        conn = (HttpURLConnection)u.openConnection();
        conn.setRequestMethod("GET");
        conn.setDoOutput(true);
        conn.connect();
        return conn.getInputstream();
    }catch (MalformedURLException e) {
            // e.printStackTrace();
            Log.e(e.getMessage(), e);
        } catch (IOException e) {
            // e.printStackTrace();
            Log.e(e.getMessage(), e);
        }
        return null;
}
/***
判断网络状态
*/
public static boolean is3g2g(Context context){
    ConnectivityManager connectvityManager = (ConnectivityManager)context
    .getSystemService("connectivity");
    NetWorkInfo info = connectivityManager.getActiveNetWorkInfo();
    return (activeNetInfo!=null&&activeNetInfo.getType()==0);
}
/**
在onfling之中判断是否左滑
**/

private boolean isScrollingLeft(MotionEvent e1,MotionEvent e2){
    if(e1 == null||e2 == null){
    return false;
    }
    return e2.getX()>e1.getX();

}
原文地址:https://www.cnblogs.com/ct732003684/p/3009444.html