这是我在code.google.com中关注此代码http://code.google.com/p/android-playground/source/browse/#svn%2Ftrunk%2FSwipeyTabsSample的代码 告诉我如何在此应用程序中添加活动？在所有标签中显示相同的活动
public class SwipeyTabsSampleActivity extends FragmentActivity {
private static final String [] TITLES = {
"CATEGORIES",
"FEATURED",
"TOP PAID",
"TOP FREE",
"TOP GROSSING",
"TOP NEW PAID",
"TOP NEW FREE",
"TRENDING",
};
private SwipeyTabs mTabs;
private ViewPager mViewPager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_swipeytab);
mViewPager = (ViewPager) findViewById(R.id.viewpager);
mTabs = (SwipeyTabs) findViewById(R.id.swipeytabs);
SwipeyTabsPagerAdapter adapter = new SwipeyTabsPagerAdapter(this,
getSupportFragmentManager());
mViewPager.setAdapter(adapter);
mTabs.setAdapter(adapter);
mViewPager.setOnPageChangeListener(mTabs);
mViewPager.setCurrentItem(0);
}
private class SwipeyTabsPagerAdapter extends FragmentPagerAdapter implements
SwipeyTabsAdapter {
private final Context mContext;
public SwipeyTabsPagerAdapter(Context context, FragmentManager fm) {
super(fm);
this.mContext = context;
}
@Override
public Fragment getItem(int position) {
return SwipeyTabFragment.newInstance(TITLES[position]);
}
@Override
public int getCount() {
return TITLES.length;
}
public TextView getTab(final int position, SwipeyTabs root) {
TextView view = (TextView) LayoutInflater.from(mContext).inflate(
R.layout.swipey_tab_indicator, root, false);
view.setText(TITLES[position]);
view.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mViewPager.setCurrentItem(position);
}
});
return view;
}
}
}
public interface SwipeyTabsAdapter {
/**
* Return the number swipey tabs. Needs to be aligned with the number of
* items in your {@link PagerAdapter}.
*
* @return
*/
int getCount();
/**
* Build {@link TextView} to diplay as a swipey tab.
*
* @param position the position of the tab
* @param root the root view
* @return
*/
TextView getTab(int position, SwipeyTabs root);
}
public class SwipeyTabs extends ViewGroup implements
OnPageChangeListener {
protected final String TAG = "SwipeyTabs";
private SwipeyTabsAdapter mAdapter;
private int mCurrentPos = -1;
// height of the bar at the bottom of the tabs
private int mBottomBarHeight = 2;
// height of the indicator for the fronted tab
private int mTabIndicatorHeight = 3;
// color for the bottom bar, fronted tab
private int mBottomBarColor = 0xff96aa39;
// text color for all other tabs
private int mTextColor = 0xff949494;
// holds the positions of the fronted tabs
private int[] mFrontedTabPos;
// holds the positions of the target position when swiping left
private int[] mLeftTabPos;
// holds the positions of the target position when swiping right
private int[] mRightTabPos;
// holds the positions of the current position on screen
private int[] mCurrentTabPos;
private Paint mCachedTabPaint;
private int mWidth = -1;
public SwipeyTabs(Context context) {
this(context, null);
}
public SwipeyTabs(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SwipeyTabs(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
final TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.SwipeyTabs, defStyle, 0);
mBottomBarColor = a.getColor(R.styleable.SwipeyTabs_bottomBarColor,
mBottomBarColor);
mBottomBarHeight = a.getDimensionPixelSize(
R.styleable.SwipeyTabs_bottomBarHeight, 2);
mTabIndicatorHeight = a.getDimensionPixelSize(
R.styleable.SwipeyTabs_tabIndicatorHeight, 3);
a.recycle();
init();
}
/**
* Initialize the SwipeyTabs {@link ViewGroup}
*/
private void init() {
// enable the horizontal fading edges which will be drawn by the parent
// View
setHorizontalFadingEdgeEnabled(true);
setFadingEdgeLength((int) (getResources().getDisplayMetrics().density *
35.0f + 0.5f));
setWillNotDraw(false);
mCachedTabPaint = new Paint();
mCachedTabPaint.setColor(mBottomBarColor);
}
/**
* Set the adapter.
*
* @param adapter
*/
public void setAdapter(SwipeyTabsAdapter adapter) {
if (mAdapter != null) {
// TODO: data set observer
}
mAdapter = adapter;
mCurrentPos = -1;
mFrontedTabPos = null;
mLeftTabPos = null;
mRightTabPos = null;
mCurrentTabPos = null;
// clean up our childs
removeAllViews();
if (mAdapter != null) {
final int count = mAdapter.getCount();
// add the child text views
for (int i = 0; i < count; i++) {
addView(mAdapter.getTab(i, this));
}
mCurrentPos = 0;
mFrontedTabPos = new int[count];
mLeftTabPos = new int[count];
mRightTabPos = new int[count];
mCurrentTabPos = new int[count];
mWidth = -1;
requestLayout();
}
}
/**
* Calculate the fronted, left and right positions
*
* @param forceLayout
* force the current positions to the values of the calculated
* fronted positions
*/
private void updateTabPositions(boolean forceLayout) {
if (mAdapter == null) {
return;
}
calculateTabPosition(mCurrentPos, mFrontedTabPos);
calculateTabPosition(mCurrentPos + 1, mLeftTabPos);
calculateTabPosition(mCurrentPos - 1, mRightTabPos);
updateEllipsize();
if (forceLayout) {
final int count = mAdapter.getCount();
for (int i = 0; i < count; i++) {
mCurrentTabPos[i] = mFrontedTabPos[i];
}
}
}
/**
* Calculate the position of the tabs.
*
* @param position
* the position of the fronted tab
* @param tabPositions
* the array in which to store the result
*/
private void calculateTabPosition(int position, int[] tabPositions) {
if (mAdapter == null) {
return;
}
final int count = mAdapter.getCount();
if (position >= 0 && position < count) {
final int width = getMeasuredWidth();
final View centerTab = getChildAt(position);
tabPositions[position] = width / 2 - centerTab.getMeasuredWidth()
/ 2;
for (int i = position - 1; i >= 0; i--) {
final TextView tab = (TextView) getChildAt(i);
if (i == position - 1) {
tabPositions[i] = 0 - tab.getPaddingLeft();
} else {
tabPositions[i] = 0 - tab.getMeasuredWidth() -
width;
}
tabPositions[i] = Math.min(tabPositions[i], tabPositions[i
+ 1]
- tab.getMeasuredWidth());
}
for (int i = position + 1; i < count; i++) {
final TextView tab = (TextView) getChildAt(i);
if (i == position + 1) {
tabPositions[i] = width - tab.getMeasuredWidth()
+ tab.getPaddingRight();
} else {
tabPositions[i] = width * 2;
}
final TextView prevTab = (TextView) getChildAt(i - 1);
tabPositions[i] = Math.max(tabPositions[i], tabPositions[i
- 1]
+ prevTab.getMeasuredWidth());
}
} else {
for (int i = 0; i < tabPositions.length; i++) {
tabPositions[i] = -1;
}
}
}
/**
* Update the ellipsize of the text views
*/
private void updateEllipsize() {
if (mAdapter == null) {
return;
}
final int count = mAdapter.getCount();
for (int i = 0; i < count; i++) {
TextView tab = (TextView) getChildAt(i);
if (i < mCurrentPos) {
tab.setEllipsize(null);
tab.setGravity(Gravity.RIGHT | Gravity.CENTER_VERTICAL);
} else if (i == mCurrentPos) {
tab.setEllipsize(TruncateAt.END);
tab.setGravity(Gravity.LEFT | Gravity.CENTER_VERTICAL);
} else if (i > mCurrentPos) {
tab.setEllipsize(null);
tab.setGravity(Gravity.LEFT | Gravity.CENTER_VERTICAL);
}
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
measureTabs(widthMeasureSpec, heightMeasureSpec);
int height = 0;
final View v = getChildAt(0);
if (v != null) {
height = v.getMeasuredHeight();
}
setMeasuredDimension(
resolveSize(getPaddingLeft() + widthSize +
getPaddingRight(),
widthMeasureSpec),
resolveSize(height + mBottomBarHeight + getPaddingTop()
+ getPaddingBottom(), heightMeasureSpec));
if (mWidth != widthSize) {
mWidth = widthSize;
updateTabPositions(true);
}
}
/**
* Measure our tab text views
*
* @param widthMeasureSpec
* @param heightMeasureSpec
*/
private void measureTabs(int widthMeasureSpec, int heightMeasureSpec) {
if (mAdapter == null) {
return;
}
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
final int maxWidth = (int) (widthSize * 0.6);
final int count = mAdapter.getCount();
for (int i = 0; i < count; i++) {
LayoutParams layoutParams = (LayoutParams) getChildAt(i)
.getLayoutParams();
final int widthSpec = MeasureSpec.makeMeasureSpec(maxWidth,
MeasureSpec.AT_MOST);
final int heightSpec = MeasureSpec.makeMeasureSpec(
layoutParams.height, MeasureSpec.EXACTLY);
getChildAt(i).measure(widthSpec, heightSpec);
}
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
if (mAdapter == null) {
return;
}
final int count = mAdapter.getCount();
for (int i = 0; i < count; i++) {
View v = getChildAt(i);
v.layout(mCurrentTabPos[i], this.getPaddingTop(), mCurrentTabPos[i]
+ v.getMeasuredWidth(),
this.getPaddingTop() + v.getMeasuredHeight());
}
}
@Override
protected void dispatchDraw(Canvas canvas) {
if (mCurrentPos != -1) {
// calculate the relative position of the fronted tab to set the
// alpha channel of the tab indicator
final int tabSelectedTop = getHeight() - getPaddingBottom()
- mBottomBarHeight - mTabIndicatorHeight;
final View currentTab = getChildAt(mCurrentPos);
final int centerOfTab = (mCurrentTabPos[mCurrentPos] + currentTab
.getMeasuredWidth()) -
(currentTab.getMeasuredWidth() / 2);
final int center = getWidth() / 2;
final int centerDiv3 = center / 3;
final float relativePos = 1.0f - Math.min(
Math.abs((float) (centerOfTab - center)
/ (float) (centerDiv3)), 1.0f);
mCachedTabPaint.setAlpha((int) (255 * relativePos));
canvas.drawRect(
mCurrentTabPos[mCurrentPos],
tabSelectedTop,
mCurrentTabPos[mCurrentPos] +
currentTab.getMeasuredWidth(),
tabSelectedTop + mTabIndicatorHeight,
mCachedTabPaint);
// set the correct text colors on the text views
final int count = mAdapter.getCount();
for (int i = 0; i < count; i++) {
final TextView tab = (TextView) getChildAt(i);
if (mCurrentPos == i) {
tab.setTextColor(interpolateColor(mBottomBarColor,
mTextColor, 1.0f - relativePos));
} else {
tab.setTextColor(mTextColor);
}
}
}
super.dispatchDraw(canvas);
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
// draw the bottom bar
final int bottomBarTop = getHeight() - getPaddingBottom()
- mBottomBarHeight;
mCachedTabPaint.setAlpha(0xff);
canvas.drawRect(0, bottomBarTop, getWidth(), bottomBarTop
+ mBottomBarHeight, mCachedTabPaint);
}
@Override
protected float getLeftFadingEdgeStrength() {
// forced so that we will always have the left fading edge
return 1.0f;
}
@Override
protected float getRightFadingEdgeStrength() {
// forced so that we will always have the right fading edge
return 1.0f;
}
public void onPageScrollStateChanged(int state) {
}
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels) {
if (mAdapter == null) {
return;
}
final int count = mAdapter.getCount();
float x = 0.0f;
int dir = 0;
// detect the swipe direction
if (positionOffsetPixels != 0 && mCurrentPos == position) {
dir = -1;
x = positionOffset;
} else if (positionOffsetPixels != 0 && mCurrentPos != position) {
dir = 1;
x = 1.0f - positionOffset;
}
// update the current positions
for (int i = 0; i < count; i++) {
final float curX = mFrontedTabPos[i];
float toX = 0.0f;
if (dir < 0) {
toX = mLeftTabPos[i];
} else if (dir > 0) {
toX = mRightTabPos[i];
} else {
toX = mFrontedTabPos[i];
}
final int offsetX = (int) ((toX - curX) * x + 0.5f);
final int newX = (int) (curX + offsetX);
mCurrentTabPos[i] = newX;
}
requestLayout();
invalidate();
}
public void onPageSelected(int position) {
mCurrentPos = position;
updateTabPositions(false);
}
private int interpolateColor(final int color1, final int color2,
float fraction) {
final float alpha1 = Color.alpha(color1) / 255.0f;
final float red1 = Color.red(color1) / 255.0f;
final float green1 = Color.green(color1) / 255.0f;
final float blue1 = Color.blue(color1) / 255.0f;
final float alpha2 = Color.alpha(color2) / 255.0f;
final float red2 = Color.red(color2) / 255.0f;
final float green2 = Color.green(color2) / 255.0f;
final float blue2 = Color.blue(color2) / 255.0f;
final float deltaAlpha = alpha2 - alpha1;
final float deltaRed = red2 - red1;
final float deltaGreen = green2 - green1;
final float deltaBlue = blue2 - blue1;
float alpha = alpha1 + (deltaAlpha * fraction);
float red = red1 + (deltaRed * fraction);
float green = green1 + (deltaGreen * fraction);
float blue = blue1 + (deltaBlue * fraction);
alpha = Math.max(Math.min(alpha, 1f), 0f);
red = Math.max(Math.min(red, 1f), 0f);
green = Math.max(Math.min(green, 1f), 0f);
blue = Math.max(Math.min(blue, 1f), 0f);
return Color.argb((int) (alpha * 255.0f), (int) (red * 255.0f),
(int) (green * 255.0f), (int) (blue * 255.0f));
}
}
public class SwipeyTabFragment extends Fragment {
public static Fragment newInstance(String title) {
SwipeyTabFragment f = new SwipeyTabFragment();
Bundle args = new Bundle();
args.putString("title", title);
f.setArguments(args);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_swipeytab,
null);
final String title = getArguments().getString("title");
((TextView) root.findViewById(R.id.text)).setText(title);
return root;
}
}
答案 0 :(得分：0)
告诉我如何在此应用程序中添加活动？在所有标签中显示相同的活动
你没有。在两年前就已经弃用了标签中的活动。
ViewPager通常会为其网页使用片段，如上面粘贴的代码所示。在此示例中，每个页面都是SwipeyTabFragment，但如果您愿意，欢迎您将页面设置为不同的片段类。您也可以不使用片段，而是使用自定义Views代替页面。但是没有人支持将活动作为页面。