实例介绍
【实例简介】
【实例截图】
【实例截图】
【核心代码】
package com.vatty.activity;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import android.content.res.Resources;
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.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.TextView;
import app.ViewPag.R;
/**
* vatty *
*
* hongshengpeng.com
*
*/
public class MainActivity extends FragmentActivity {
private static final String TAG = "MainActivity";
private ViewPager mPager;
private ArrayList<Fragment> fragmentsList;
private ImageView ivBottomLine;
private TextView tvTabActivity, tvTabGroups, tvTabFriends, tvTabChat;
private int currIndex = 0;
private int bottomLineWidth;
private int offset = 0;
private int position_one;
private int position_two;
private int position_three;
private Resources resources;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
resources = getResources();
InitWidth();
InitTextView();
InitViewPager();
}
private void InitTextView() {
tvTabActivity = (TextView) findViewById(R.id.tv_tab_activity);
tvTabGroups = (TextView) findViewById(R.id.tv_tab_groups);
tvTabFriends = (TextView) findViewById(R.id.tv_tab_friends);
tvTabChat = (TextView) findViewById(R.id.tv_tab_chat);
tvTabActivity.setOnClickListener(new MyOnClickListener(0));
tvTabGroups.setOnClickListener(new MyOnClickListener(1));
tvTabFriends.setOnClickListener(new MyOnClickListener(2));
tvTabChat.setOnClickListener(new MyOnClickListener(3));
}
private void InitViewPager() {
mPager = (ViewPager) findViewById(R.id.vPager);
fragmentsList = new ArrayList<Fragment>();
Map<String, Object> paramMap = new HashMap<String, Object>();
paramMap.put("userid","小洪");
paramMap.put("age",23);
Map<String, Object> paramMap2 = new HashMap<String, Object>();
paramMap2.put("userid","vatty");
paramMap2.put("age",24);
Map<String, Object> paramMap3 = new HashMap<String, Object>();
paramMap3.put("userid","小明");
paramMap3.put("age",25);
Map<String, Object> paramMap4 = new HashMap<String, Object>();
paramMap4.put("userid","hongshengpeng.com");
paramMap4.put("age",26);
Fragment activityfragment = TestFragment.newInstance("Hello Activity.",paramMap);
Fragment groupFragment = TestFragment.newInstance("Hello Group.",paramMap2);
Fragment friendsFragment=TestFragment.newInstance("Hello Friends.",paramMap3);
Fragment chatFragment=TestFragment.newInstance("Hello Chat.",paramMap4);
fragmentsList.add(activityfragment);
fragmentsList.add(groupFragment);
fragmentsList.add(friendsFragment);
fragmentsList.add(chatFragment);
mPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager(), fragmentsList));
mPager.setCurrentItem(0);
mPager.setOnPageChangeListener(new MyOnPageChangeListener());
}
private void InitWidth() {
ivBottomLine = (ImageView) findViewById(R.id.iv_bottom_lines);
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.lawngreen));
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) {
animation = new TranslateAnimation(position_two, position_one, 0, 0);
tvTabFriends.setTextColor(resources.getColor(R.color.lightwhite));
} else if (currIndex == 3) {
animation = new TranslateAnimation(position_three, position_one, 0, 0);
tvTabChat.setTextColor(resources.getColor(R.color.lightwhite));
}
tvTabGroups.setTextColor(resources.getColor(R.color.lawngreen));
break;
case 2:
if (currIndex == 0) {
animation = new TranslateAnimation(0, position_two, 0, 0);
tvTabActivity.setTextColor(resources.getColor(R.color.lightwhite));
} else if (currIndex == 1) {
animation = new TranslateAnimation(position_one, position_two, 0, 0);
tvTabGroups.setTextColor(resources.getColor(R.color.lightwhite));
} else if (currIndex == 3) {
animation = new TranslateAnimation(position_three, position_two, 0, 0);
tvTabChat.setTextColor(resources.getColor(R.color.lightwhite));
}
tvTabFriends.setTextColor(resources.getColor(R.color.lawngreen));
break;
case 3:
if (currIndex == 0) {
animation = new TranslateAnimation(0, position_three, 0, 0);
tvTabActivity.setTextColor(resources.getColor(R.color.lightwhite));
} else if (currIndex == 1) {
animation = new TranslateAnimation(position_one, position_three, 0, 0);
tvTabGroups.setTextColor(resources.getColor(R.color.lightwhite));
} else if (currIndex == 2) {
animation = new TranslateAnimation(position_two, position_three, 0, 0);
tvTabFriends.setTextColor(resources.getColor(R.color.lightwhite));
}
tvTabChat.setTextColor(resources.getColor(R.color.lawngreen));
break;
}
currIndex = arg0;
animation.setFillAfter(true);
animation.setDuration(300);
ivBottomLine.startAnimation(animation);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
}
}
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