package com.jim.testapp;

import android.app.Activity;

import android.os.AsyncTask;

import android.os.Handler;

import android.os.Message;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

import android.widget.Button;

class MyHandler extends Handler

{

    private Activity mActivity;

    private Button btn;

    public MyHandler(Activity activity) {

        mActivity = activity;

        btn = (Button)activity.findViewById(R.id.button);

    }

    @Override

    public void handleMessage(Message msg) {

        Integer integer = (Integer) msg.obj;

        switch (msg.what) {

            case MainActivity.MSG_ONE:

                btn.setText(integer.toString());

                break;

        }

    }

}

class MyAsyncTask extends AsyncTask<String, Integer, Integer> {

    private MainActivity mActivity;

    private Button btn;

    public MyAsyncTask(MainActivity activity) {

        mActivity = activity;

        btn = (Button)activity.findViewById(R.id.button);

    }

    @Override

    protected void onPreExecute() {

        super.onPreExecute();

        btn.setText("Loading start");

    }

    @Override

    protected void onPostExecute(Integer integer) {

        super.onPostExecute(integer);

        btn.setText("Loading finished");

        Log.i(MainActivity.TAG, "Result is " + integer);

    }

    @Override

    protected void onProgressUpdate(Integer... values) {

        super.onProgressUpdate(values);

        btn.setText("Loading " + values[0] + "%");

    }

    @Override

    protected Integer doInBackground(String... params) {

        Log.i(MainActivity.TAG, params[0]);

        for (int i = 1; i <= 10; i++) {

            try {

                Thread.sleep(1000);

            } catch (InterruptedException e) {

                Thread.currentThread().interrupt();

            }

            publishProgress(i*10);

        }

        return 0;

    }

}

public class MainActivity extends AppCompatActivity {

    public static final String TAG = "jimtest";

    public static final int MSG_ONE = 1;

    public static final int MSG_TWO = 2;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //MyAsyncTask task = new MyAsyncTask(this);

        //task.execute("i am the param");

        final MyHandler h = new MyHandler(this);

        Runnable r = new Runnable() {

            @Override

            public void run() {

                for (int i = 0; i < 10; i++) {

                    h.obtainMessage(MSG_ONE, new Integer(i)).sendToTarget();

                    try {

                        Thread.sleep(1000);

                    } catch (InterruptedException e) {

                        Thread.currentThread().interrupt();

                    }

                }

            }

        };

        new Thread(r).start();

    }

}