스레드로 애니메이션 만들기
여러 이미지를 연속해서 바꿔가며 애니메이션 효과를 만들고 싶을 때 스레드를 사용하는 경우가 많다.
아래 예제를 통해 우리 귀여운 꿀이를 보는 동시에 애니메이션 효과를 알아보자
MainActivity.java
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public class MainActivity extends AppCompatActivity {
ImageView imageView;
ArrayList<Drawable> drawableList = new ArrayList<Drawable>();
Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Resources res = getResources();
drawableList.add(res.getDrawable(R.drawable.m1));
drawableList.add(res.getDrawable(R.drawable.m2));
drawableList.add(res.getDrawable(R.drawable.m3));
drawableList.add(res.getDrawable(R.drawable.m4));
imageView = findViewById(R.id.imageView);
Button button = findViewById(R.id.button);
button.setOnClickListener((v)->{
AnimThread thread = new AnimThread();
thread.start();
});
}
class AnimThread extends Thread{
public void run(){
int idx =0;
for(int i=0; i<100; i++){
final Drawable drawable = drawableList.get(idx);
idx+=1;
if(idx>3)
idx=0;
handler.post(new Runnable() {
@Override
public void run() {
imageView.setImageDrawable(drawable);
}
});
try{
Thread.sleep(1000);
}catch(Exception e){
e.printStackTrace();
}
}
}
}
예제
