Bismillahirrohmaanirrohiim…
Di bawah ini adalah beberapa fungsi yang berguna untuk program java di android studio.
public String getId() { Random r = new Random(); long unixTime = System.currentTimeMillis();// / 1000L; int rmin = 1; int rmax = 9999; String unikid = Long.toString(unixTime) + Integer.toString(r.nextInt(rmax - rmin) + rmin); return unikid; }
public int getIdInt() { Random r = new Random(); int idx = (int)System.currentTimeMillis(); int rmin = 1; int rmax = 9999; int unikid = idx + (r.nextInt(rmax - rmin) + rmin); return unikid; }
public String getDeviceInfoStr() { String devinfo = ""; devinfo += "|SDK: " + String.valueOf(Build.VERSION.SDK_INT); devinfo += "|VERSION: " + Build.VERSION.RELEASE; devinfo += "|BRAND: " + Build.BRAND; devinfo += "|MANUFACTURER: " + Build.MANUFACTURER; devinfo += "|MODEL: " + Build.MODEL; devinfo += "|ID: " + Build.ID; devinfo += "|SERIAL: " + Build.SERIAL; /* Log.i("TAGG", "SERIAL: " + Build.SERIAL); Log.i("TAGG","MODEL: " + Build.MODEL); Log.i("TAGG","ID: " + Build.ID); Log.i("TAGG","Manufacture: " + Build.MANUFACTURER); Log.i("TAGG","PRODUCT: " + Build.PRODUCT); Log.i("TAGG","type: " + Build.TYPE); Log.i("TAGG","user: " + Build.USER); Log.i("TAGG","BASE: " + Build.VERSION_CODES.BASE); Log.i("TAGG","INCREMENTAL " + Build.VERSION.INCREMENTAL); Log.i("TAGG","SDK " + Build.VERSION.SDK_INT); Log.i("TAGG","BOARD: " + Build.BOARD); Log.i("TAGG","BOOTLOADER: " + Build.BOOTLOADER); Log.i("TAGG","BRAND " + Build.BRAND); Log.i("TAGG","HOST " + Build.HOST); Log.i("TAGG","FINGERPRINT: "+Build.FINGERPRINT); Log.i("TAGG","Version Code: " + Build.VERSION.RELEASE); Log.i("TAGG","DEVICE: " + Build.DEVICE); Log.i("TAGG","DISPLAY: " + Build.DISPLAY); Log.i("TAGG","HARDWARE: " + Build.HARDWARE); Log.i("TAGG","TAGS: " + Build.TAGS); */ return devinfo; }
public String dateNow(String formatdate) { //return "yyyyMMdd" SimpleDateFormat sdf = new SimpleDateFormat(formatdate); return sdf.format(new Date()); }
public String getCurrentDate() { Calendar cal = Calendar.getInstance(); SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String formattedDate = df.format(cal.getTime()); return formattedDate; }
String getdateFmt = '2020-9-3';//tgl 3 sept 2020 SimpleDateFormat fromUser = new SimpleDateFormat("yyyy-M-d"); SimpleDateFormat myFormat = new SimpleDateFormat("dd MMMM yyyy"); try { getdateFmt = myFormat.format(fromUser.parse(getdate)); } catch (ParseException e) { e.printStackTrace(); }
Handler handler = new Handler(); handler.postDelayed(new Runnable() { @Override public void run() { //perintah di sini } }, 1000);//1 detik
private void addTextView() { //llObj = linear layout obj int numChild = llObj.getChildCount(); TextView textView = new TextView(this); textView.setText("tambahan baru. Jum Child: "+numChild); llObj.addView(textView, 0); //0 adalah index, jadi posisi paling atas (prepend). kl dikosongi nanti textview akan ditaruh di paling bawah if (numChild>= 10) { //hapus bari paling bawah, shg tdk memanjang unlimited llResponse.removeViewAt(10); } }
String options = '{"data1":"value1","data2":"value2"}'; try { JSONObject jo = new JSONObject(options); String data1= jo.getString("data1"); } catch (JSONException e) { //e.printStackTrace(); //e.getMessage() }
String options = '{"nama":"rudi","kendaraan":{"satu":"mobil","dua":"motor"}}'; try { JSONObject jo = new JSONObject(options); String data1= jo.getString("nama"); } catch (JSONException e) { //e.printStackTrace(); //e.getMessage() } //ada dua cara //cara pertama JSONObject pp = null; HashMap<String, Object> map = new HashMap<>(); try { pp = jo.getJSONObject("kendaraan"); //String value1 = pp.getString("satu");//ini bisa diambil kalau kunci sudah diketahui, hasilnya=>mobil Iterator<String> iter = pp.keys(); while (iter.hasNext()) { String key = iter.next(); map.put(key, pp.get(key)); } } catch (JSONException e) { e.printStackTrace(); } //cara kedua JSONArray pparr = null; try { pparr = jo.getJSONArray("post_params"); for (int i=0;i<pparr.length();i++) { JSONObject jsonObj = pparr.getJSONObject(i); String k = jsonObj.keys().next(); String v = jsonObj.getString(k); } } catch (JSONException e) { e.printStackTrace(); }
Map<String, String> map = new HashMap<String, String>(); map.put("key1", "value1"); map.put("key2", "value2"); for (Map.Entry<String, String> entry : map.entrySet()) { System.out.println(entry.getKey() + " = " + entry.getValue()); }
Kemungkinan posting ini akan terus diupdate seiring perkembangan perkodingan.
Terimakasih semoga berguna.
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