Question: My Testprogram should change a **TextViews** text and after it is done, it should wait on second before the next text change. However my program runs the text changes instant behind each other:

```
    t.setText("Test!"); 
    Handler handler = new Handler();
    handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        t.setText("Test - after 1 second!");    
        }
    },1000);

```

The first text is not even there close to a second.

Answer: 
Hard to say why that wouldn't work from that limited amount of code but you can just add the post delayed to your `View`. You don't need a handler.

```
t.setText("Test!");
t.postDelayed(new Runnable() {
    @Override
    public void run() {
       t.setText("Test - after 1 second!");
    }
}, 1000);

```

All `Views` in Android have a built in handler class.
You are missing the following:

```
handler.postDelayed(this, 1000);

```

inside the run method. Here **this** will refer to the handler object