AnimationDrawable 활용

완성형

drawable 설정

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
    android:oneshot="false"
    android:visible="true">

    <item
        android:drawable="@drawable/sound_on_max"
        android:duration="750" />
    <item
        android:drawable="@drawable/sound_on_min"
        android:duration="500" />
    <item
        android:drawable="@drawable/sound_on_mid"
        android:duration="500" />

</animation-list>

매개변수

참고 이미지

활동 설정

public class MainActivity extends AppCompatActivity {

    private ImageView img;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        img = (ImageView) findViewById(R.id.imageView);
        img.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (img.getBackground() instanceof AnimationDrawable) {
                    img.setBackground(ContextCompat.getDrawable(MainActivity.this, R.drawable.sound_off));
                } else {
                    img.setBackground(ContextCompat.getDrawable(MainActivity.this, R.drawable.animation_sound));
                    // AnimationDrawableを取得
                    AnimationDrawable frameAnimation = (AnimationDrawable) img.getBackground();
                    // アニメーションの開始
                    frameAnimation.start();
                }
            }
        });
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        if (img == null) {
            return;
        }
        if (img.getBackground() instanceof AnimationDrawable) {
            // AnimationDrawableを取得
            AnimationDrawable frameAnimation = (AnimationDrawable) img.getBackground();

            // アニメーションの開始
            frameAnimation.start();
        }
    }
}

참고 페이지