Android and back button
<p>I have a problem with back button. He doesn't work. When I go from first activity to second and from second to third back button don't want work. I used :</p>

<pre><code>@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        moveTaskToBack(true);
        Log.v("Co1s", "Cos1");
        return true;
    }
    return super.onKeyDown(keyCode, event);
}
</code></pre>

<p>But when I push the button I get only:</p>

<blockquote>
  <p>05-23 10:45:57.863: W/KeyCharacterMap(238): Can't open keycharmap file
  05-23 10:45:57.863: W/KeyCharacterMap(238): Error loading keycharmap
  file '/system/usr/keychars/pm8058-keypad.kcm.bin'.
  hw.keyboards.0.devname='pm8058-keypad' 05-23 10:45:57.863:
  W/KeyCharacterMap(238): Using default keymap:
  /system/usr/keychars/qwerty.kcm.bin</p>
</blockquote>

<p>And this log in this function is not showing in logs. Why?</p>

<p>Edit:
acrivity nr1:</p>

<pre><code>protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.services_description);

        back_button = (Button) findViewById(R.id.service_back_button);
        back_button.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                intent = new Intent(services_description.this, service.class);
                TabActivityGroup parentActivity = (TabActivityGroup)getParent();
                parentActivity.startChildActivity("menu_activity", intent);     
                finish();
            }
        });
    }
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            Log.v("Co1s", "Cos1");
        }
        return super.onKeyDown(keyCode, event);
    }
</code></pre>

<p>and second:</p>

<pre><code>@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.service);

    title = (TextView) findViewById(R.id.serviceTitle);
    description = (TextView) findViewById(R.id.serviceDescription);
    nextPage = (ImageView) findViewById(R.id.serviceNextPage);
    back_button = (Button) findViewById(R.id.service_back_button);


    nextPage.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            intent = new Intent(service.this, services_description.class);
            TabActivityGroup parentActivity = (TabActivityGroup)getParent();
            parentActivity.startChildActivity("menu_activity", intent);     

        }
    });
    back_button.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {

            finish();

        }
    });
}
@Override
public void onBackPressed() {
    Log.v("Cos", "Cos");
    finish();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        moveTaskToBack(true);
        Log.v("Co1s", "Cos1");
        return true;
    }
    return super.onKeyDown(keyCode, event);
}
</code></pre>
