Android基于ViewPager Fragment实现选项卡

private void InitWidth() { ivBottomLine = (ImageView) findViewById(R.id.iv_bottom_line);

bottomLineWidth = ivBottomLine.getLayoutParams().width; Log.d(TAG, "cursor imageview width=" + bottomLineWidth);

DisplayMetrics dm = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm);

int screenW = dm.widthPixels; offset = (int) ((screenW / 4.0 - bottomLineWidth) / 2);

Log.i("MainActivity", "offset=" + offset); position_one = (int) (screenW / 4.0);

position_two = position_one * 2; position_three = position_one * 3;

} public class MyOnClickListener implements View.OnClickListener {

private int index = 0; public MyOnClickListener(int i) {

index = i; }

@Override public void onClick(View v) {

mPager.setCurrentItem(index); }

}; public class MyOnPageChangeListener implements OnPageChangeListener {

@Override public void onPageSelected(int arg0) {

Animation animation = null; switch (arg0) {

case 0: if (currIndex == 1) {

animation = new TranslateAnimation(position_one, 0, 0, 0); tvTabGroups.setTextColor(resources.getColor(R.color.lightwhite));

} else if (currIndex == 2) { animation = new TranslateAnimation(position_two, 0, 0, 0);

tvTabFriends.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 3) {

animation = new TranslateAnimation(position_three, 0, 0, 0); tvTabChat.setTextColor(resources.getColor(R.color.lightwhite));

} tvTabActivity.setTextColor(resources.getColor(R.color.white));

break; case 1:

if (currIndex == 0) { animation = new TranslateAnimation(0, position_one, 0, 0);

tvTabActivity.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 2) {