DelayedTextWatcher.java

package com.naukri.modules;

/**
 * Created by sudeep.srivastava on 05-Aug-16.
 */
import android.os.AsyncTask;
import android.text.Editable;
import android.text.TextWatcher;


public abstract class DelayedTextWatcher implements TextWatcher {

 private long delayTime;
 private WaitTask lastWaitTask;

 public DelayedTextWatcher(long delayTime) {
 super();
 this.delayTime = delayTime;
 }

 @Override
 public void afterTextChanged(Editable s) {
 synchronized (this) {
 if (lastWaitTask != null){
 lastWaitTask.cancel(true);
 }
 lastWaitTask = new WaitTask();
 lastWaitTask.execute(s);
 }
 }

 @Override
 public void beforeTextChanged(CharSequence s, int start, int count, int after) {
 // TODO Auto-generated method stub

 }

 @Override
 public void onTextChanged(CharSequence s, int start, int before, int count) {
 // TODO Auto-generated method stub

 }

 public abstract void afterTextChangedDelayed(Editable s);

 private class WaitTask extends AsyncTask<Editable, Void, Editable> {

 @Override
 protected Editable doInBackground(Editable... params) {
 try {
 Thread.sleep(delayTime);
 } catch (InterruptedException e) {
 }
 return params[0];
 }

 @Override
 protected void onPostExecute(Editable result) {
 super.onPostExecute(result);
 afterTextChangedDelayed(result);
 }
 }

}