Changing image in imageview using Threads

Question

I\'m getting error with this code. Why huhu 123123123

Thread timer = new Thread()
{
    public void run()
    {
        try
        {
            sleep(1500)         


        

Answer 1

You should update ui on the ui thread. Use runonUithread.

  runOnUiThread(new Runnable() {

  @Override
  public void run() {
   // set image to imageview here
   // ui should be updated on the ui thread.
   // you cannot update ui from a background thread  
  }
 });

But i would suggest you to use a handler.

public class Splash extends Activity {

//stopping splash screen starting home activity.
private static final int STOPSPLASH = 0;
//time duration in millisecond for which your splash screen should visible to
  //user. here i have taken half second
private static final long SPLASHTIME = 500;

//handler for splash screen
private Handler splashHandler = new Handler() {
     @Override
     public void handleMessage(Message msg) {
          switch (msg.what) {
            case STOPSPLASH:
                //Generating and Starting new intent on splash time out 
                Intent intent = new Intent(Splash.this, 
                                         MainActivity.class);
                startActivity(intent);
                    Splash.this.finish(); 
                break;
          }
          super.handleMessage(msg);
     }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.splash);

    //Generating message and sending it to splash handle 
    Message msg = new Message();
    msg.what = STOPSPLASH;
    splashHandler.sendMessageDelayed(msg, SPLASHTIME);
}
}

splash.xml

     // have a imageview and set background to imageview   

Using handlers and postdelayed

public class Splash extends Activity {
private static final int SPLASH_TIME = 2 * 1000;// 3 seconds

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.splash);
    ImageView iv= (ImageView) findViewById(R.id.imageView1);
    iv.setBackgroundResource(R.drawable.afor);
    try {
    new Handler().postDelayed(new Runnable() {

        public void run() {

            Intent intent = new Intent(Splash.this,
                MainActivity.class);
            startActivity(intent);

            Splash.this.finish();
        }


    }, SPLASH_TIME);

    } catch(Exception e)
       {
        e.printStacktrace();
       }
}


@Override
public void onBackPressed() {
    this.finish();
    super.onBackPressed();
}
}

splash.xml