package android.view.animation;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.Resources.Theme;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import com.android.internal.R;
import com.android.internal.view.animation.HasNativeInterpolator;
import com.android.internal.view.animation.NativeInterpolatorFactory;
import com.android.internal.view.animation.NativeInterpolatorFactoryHelper;
@HasNativeInterpolator
public class CycleInterpolator extends BaseInterpolator implements NativeInterpolatorFactory {
public CycleInterpolator(float cycles) {
mCycles = cycles;
}
public CycleInterpolator(Context context, AttributeSet attrs) {
this(context.getResources(), context.getTheme(), attrs);
}
public CycleInterpolator(Resources resources, Theme theme, AttributeSet attrs) {
TypedArray a;
if (theme != null) {
a = theme.obtainStyledAttributes(attrs, R.styleable.CycleInterpolator, 0, 0);
} else {
a = resources.obtainAttributes(attrs, R.styleable.CycleInterpolator);
}
mCycles = a.getFloat(R.styleable.CycleInterpolator_cycles, 1.0f);
setChangingConfiguration(a.getChangingConfigurations());
a.recycle();
}
public float getInterpolation(float input) {
return (float)(Math.sin(2 * mCycles * Math.PI * input));
}
private float mCycles;
@Override
public long createNativeInterpolator() {
return NativeInterpolatorFactoryHelper.createCycleInterpolator(mCycles);
}
}