ThreadHandlerSample.java

public class MainActivity extends AppCompatActivity {

    //Handler & Thread
    int mProgression = 0;
    Handler mHandler = null;
    private static final int WHAT_PROGRESSION = 1;
    private boolean mStarted = false;

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

        mHandler = new MyHandler();

        findViewById(R.id.buttonStart).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //mServiceName = startService(new Intent(MainActivity.this, TestService.class));
                if (!mStarted) {
                    new Thread(new Runnable() {
                        @Override
                        public void run() {
                            mStarted = true;
                            mProgression = 0;
                            while (mProgression < 10) {
                                try {
                                    mProgression++;
                                    Thread.sleep(1000);

                                    Message message = mHandler.obtainMessage();
                                    message.what = WHAT_PROGRESSION;
                                    message.arg1 = mProgression;
                                    mHandler.sendMessage(message);

                                } catch (InterruptedException e) {
                                    e.printStackTrace();
                                }
                            }
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(MainActivity.this, "Téléchargement terminé !", Toast.LENGTH_SHORT).show();
                                    Log.d("Progression", "completed");
                                }
                            });
                            mStarted = false;
                        }
                    }).start();
                }
            }
        });
    }

    public static class MyHandler extends Handler {

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            Log.d("Progression", msg.arg1 + "/10");
        }

    }
}