Headertab

Drop Down MenusCSS Drop Down MenuPure CSS Dropdown Menu

Thursday, 2 June 2016

Smple AsynTask Sample

Hello friends

Today i cover how to use AsynTask class.


actvity_main.xml



<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.samset.asyntaskexample.MainActivity">

    <TextView
        android:id="@+id/tv_time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="16dp"
        android:text="Sleep time in milliseconds:"
        android:textColor="#444444"
        android:textSize="15dp" />

    <EditText
        android:id="@+id/et_time"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/tv_time"
        android:layout_marginTop="5dp"
        android:inputType="text">

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/btn_task"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/et_time"
        android:text="Run Async task" />

    <TextView
        android:id="@+id/tv_result"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/btn_task"
        android:layout_marginLeft="9dip"
        android:layout_marginTop="15dip"
        android:text=""
        android:textColor="#AA0000"
        android:textSize="15dp" />
</RelativeLayout>


ActvityMain.java



package com.samset.asyntaskexample;

import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private Button btnStart;
    private EditText time;
    private TextView result;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        time = (EditText) findViewById(R.id.et_time);
        btnStart = (Button) findViewById(R.id.btn_task);
        result = (TextView) findViewById(R.id.tv_result);
        btnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // created instance of MyAsynTask class which extends
                // AsyncTask
               
MyAsynTask runner = new MyAsynTask();
                String sleepTime = time.getText().toString();
                runner.execute(sleepTime); // time from editText
           
}
        });
    }

    private class MyAsynTask extends AsyncTask<String, String, String> {

        private String resp;

        // this function run on seperate thread to do background work
        // do your time taking work here
       
@Override
        protected String doInBackground(String... params) {
            publishProgress("Initilize...");
            // onProgressUpdate function
           
try {
                int time = Integer.parseInt(params[0]);
                //Sleeping for given time period for 10 times
               
for (int i = 0; i < 10; i++) {
                    Thread.sleep(time);
                    publishProgress("Downloading..." + (i + 1));
                }

                resp = "Completed " + time;
            } catch (InterruptedException e) {
                e.printStackTrace();
                resp = e.getMessage();
            } catch (Exception e) {
                e.printStackTrace();
                resp = e.getMessage();
            }
            // return result to onPostExecute function
           
return resp;
        }

        @Override
        protected void onPostExecute(String result) {
            // result published on completion of doInBackground function
           
MainActivity.this.result.setText(result);
        }

        @Override
        protected void onPreExecute() {
            // Things to be done before execution of long running operation. For

       
}

        @Override
        protected void onProgressUpdate(String... text) {

            result.setText(text[0]);
            // Things to be done while execution of long running operation is in
            // progress. For example updating ProgessDialog
       
}
    }


}


Thank you