[Ball.java]
public class Ball extends ImageView
{
Animation animTranslate = AnimationUtils.loadAnimation(getContext(), R.anim.anim_translate);
ImageView iv = null;
public Ball(Context context, int n)
{
super(context);
animTranslate.setFillAfter(true);
switch(n)
{
case 1:
iv = (ImageView)findViewById(R.id.Red);
iv.startAnimation(animTranslate);
break;
case 2:
iv = (ImageView)findViewById(R.id.Blue);
iv.startAnimation(animTranslate);
break;
case 3:
iv = (ImageView)findViewById(R.id.Green);
iv.startAnimation(animTranslate);
break;
case 4:
iv = (ImageView)findViewById(R.id.Violet);
iv.startAnimation(animTranslate);
break;
}
}
}
[MainActivity.java]
public class MainActivity extends ActionBarActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
// final Animation animTranslate = AnimationUtils.loadAnimation(this, R.anim.anim_translate);
Ball b1 = new Ball(this, 1);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
메인액티비티에서 Ball 객체를 선언하는 부분에서 NullPointerException이 납니다..
정확히는 Ball 클래스의 iv.startAnimation 부분에서 NullPointerException이 납니다...
저는 이미지뷰를 상속받아서 그 상속받은 객체를 선언할 때마다 제가 원하는 애니메이션을 주고싶은데
자꾸 NullPointerException이 나오네요.. 어떻게 해야하나요..