我是 Android 编程和堆栈溢出的新手,我需要在我的应用程序中减慢 SlidingDrawer 的动画速度。
我已经像这样子类化了 SlidingDrawer:
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.SlidingDrawer;
public class WrappingSlidingDrawer extends SlidingDrawer {
public WrappingSlidingDrawer(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
int orientation = attrs.getAttributeIntValue("android", "orientation", ORIENTATION_VERTICAL);
mTopOffset = attrs.getAttributeIntValue("android", "topOffset", 0);
mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL);
}
public WrappingSlidingDrawer(Context context, AttributeSet attrs) {
super(context, attrs);
int orientation = attrs.getAttributeIntValue("android", "orientation", ORIENTATION_VERTICAL);
mTopOffset = attrs.getAttributeIntValue("android", "topOffset", 0);
mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
if (widthSpecMode == MeasureSpec.UNSPECIFIED || heightSpecMode == MeasureSpec.UNSPECIFIED) {
throw new RuntimeException("SlidingDrawer cannot have UNSPECIFIED dimensions");
}
final View handle = getHandle();
final View content = getContent();
measureChild(handle, widthMeasureSpec, heightMeasureSpec);
if (mVertical) {
int height = heightSpecSize - handle.getMeasuredHeight() - mTopOffset;
content.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(height, heightSpecMode));
heightSpecSize = handle.getMeasuredHeight() + mTopOffset + content.getMeasuredHeight();
widthSpecSize = content.getMeasuredWidth();
if (handle.getMeasuredWidth() > widthSpecSize) widthSpecSize = handle.getMeasuredWidth();
}
else {
int width = widthSpecSize - handle.getMeasuredWidth() - mTopOffset;
getContent().measure(MeasureSpec.makeMeasureSpec(width, widthSpecMode), heightMeasureSpec);
widthSpecSize = handle.getMeasuredWidth() + mTopOffset + content.getMeasuredWidth();
heightSpecSize = content.getMeasuredHeight();
if (handle.getMeasuredHeight() > heightSpecSize) heightSpecSize = handle.getMeasuredHeight();
}
setMeasuredDimension(widthSpecSize, heightSpecSize);
}
private boolean mVertical;
private int mTopOffset;
}
我找到了这个链接:How to change animation velocity on SlidingDrawer,它说我可以找到一个替代实现,或者复制源代码并修改它。
我在自己的项目中创建了 SlidingDrawer.java 并从这里粘贴了代码,但是有错误。有几行引用 R.styleable.SlidingDrawer,例如
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.SlidingDrawer, defStyle, 0);
Eclipse 无法解决的问题。
还有 Eclipse 无法解析的四个成员变量(mTop、mBottom、mLeft、mRight)。
如何让 Eclipse 找到这些资源/变量?然后我将能够编辑一些变量以导致动画变慢,对吗?