仿微信顶部滑动切换页面

package com.huipin.viewpage; import java.util.ArrayList; import android.content.Context; import android.graphics.Color; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.view.View; import android.view.WindowManager; import android.view.animation.TranslateAnimation; import android.widget.TextView; import android.widget.LinearLayout.LayoutParams; public class ViewPageActivity extends FragmentActivity { private ViewPager mPager; private ArrayList<Fragment> fragmentList; private TextView view1, view2; private int currIndex;// 当前页卡编号 private Context mContext; @Override protected void onCreate(Bundle savedInstanceState) { WindowManager wm = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE); ActivityWidth = wm.getDefaultDisplay().getWidth(); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mContext = ViewPageActivity.this; InitButtonView(); initLineView(); InitViewPager(); } /* * 初始化标签名 */ public void InitButtonView() { view1 = (TextView) findViewById(R.id.tv_guid1); view2 = (TextView) findViewById(R.id.tv_guid2); view1.setTextColor(Color.GREEN); view2.setTextColor(Color.BLACK); view1.setOnClickListener(new txListener(0)); view2.setOnClickListener(new txListener(1)); } public class txListener implements View.OnClickListener { private int index = 0; public txListener(int i) { index = i; } @Override public void onClick(View v) { mPager.setCurrentItem(index); } } // 底部滑动线条 private View buttomView; // 当前屏幕宽度 private int ActivityWidth; // 初始化底部滑动线条 private void initLineView() { // 初始化宽高 buttomView = (View) findViewById(R.id.v_buttom); LayoutParams params = new LayoutParams(ActivityWidth / 2, 5); buttomView.setLayoutParams(params); // 初始化颜色 buttomView.setBackgroundColor(Color.GREEN); } /* * 初始化ViewPager */ public void InitViewPager() { mPager = (ViewPager) findViewById(R.id.vPager); fragmentList = new ArrayList<Fragment>(); Fragment oneFragment = TestFragment.newInstance("http://www.qq.com/" ,mContext); Fragment twoFragment = TestFragment.newInstance("http://www.sina.com.cn/",mContext); fragmentList.add(oneFragment); fragmentList.add(twoFragment); // 给ViewPager设置适配器 mPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager(), fragmentList)); mPager.setCurrentItem(0);// 设置当前显示标签页为第一页 mPager.setOnPageChangeListener(new OnPageChangeListener() { public void onPageSelected(int position) { slideView(position); currIndex = position; if(position == 0){ view1.setTextColor(Color.GREEN); view2.setTextColor(Color.BLACK); }else{ view1.setTextColor(Color.BLACK); view2.setTextColor(Color.GREEN); } } public void onPageScrolled(int arg0, float arg1, int arg2) { } public void onPageScrollStateChanged(int arg0) { } }); } // 底部滑动， positionId， 你要滑动到的位置 private void slideView(int positionIndex) { TranslateAnimation tran = null; tran = new TranslateAnimation(calcPosition(currIndex), calcPosition(positionIndex), 0, 0); tran.setDuration(300); tran.setFillAfter(true); buttomView.startAnimation(tran); } //计算位置 position 需要移动到的位置 private int calcPosition(int positionIndex){ int position = ActivityWidth/2; int currentPosition = 0; for (int i = 0; i < positionIndex; i++) { currentPosition += position; } return currentPosition; } }