效果如圖html
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[java] view plaincopyprint?android
MainActivity.java app
[java] view plaincopyprint?ide
package com.aven.qqdemo; this
import java.util.ArrayList; spa
import java.util.List; .net
import android.content.res.Resources; orm
import android.os.Bundle; htm
import android.os.Parcelable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.LayoutInflater;
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 com.demo.R;
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 = 1000;
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>();
LayoutInflater mInflater = getLayoutInflater();
View activityView = mInflater.inflate(R.layout.lay1, null);
Fragment activityfragment = TestFragment.newInstance("Hello Activity.");
Fragment groupFragment = TestFragment.newInstance("Hello Group.");
Fragment friendsFragment=TestFragment.newInstance("Hello Friends.");
Fragment chatFragment=TestFragment.newInstance("Hello Chat.");
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_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(offset, 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.white));
break;
case 2:
if (currIndex == 0) {
animation = new TranslateAnimation(offset, 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.white));
break;
case 3:
if (currIndex == 0) {
animation = new TranslateAnimation(offset, 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.white));
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) {
}
}
}
MyFragmentPagerAdapter.java
[java] view plaincopyprint?
package com.aven.qqdemo;
import java.util.ArrayList;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class MyFragmentPagerAdapter extends FragmentPagerAdapter {
private ArrayList<Fragment> fragmentsList;
public MyFragmentPagerAdapter(FragmentManager fm) {
super(fm);
}
public MyFragmentPagerAdapter(FragmentManager fm, ArrayList<Fragment> fragments) {
super(fm);
this.fragmentsList = fragments;
}
@Override
public int getCount() {
return fragmentsList.size();
}
@Override
public Fragment getItem(int arg0) {
return fragmentsList.get(arg0);
}
@Override
public int getItemPosition(Object object) {
return super.getItemPosition(object);
}
}
TestFragment.java
[html] view plaincopyprint?
package com.aven.qqdemo;
import com.demo.R;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class TestFragment extends Fragment {
private static final String TAG = "TestFragment";
private String hello;// = "hello android";
private String defaultHello = "default value";
static TestFragment newInstance(String s) {
TestFragment newFragment = new TestFragment();
Bundle bundle = new Bundle();
bundle.putString("hello", s);
newFragment.setArguments(bundle);
return newFragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "TestFragment-----onCreate");
Bundle args = getArguments();
hello = args != null ? args.getString("hello") : defaultHello;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
Log.d(TAG, "TestFragment-----onCreateView");
View view = inflater.inflate(R.layout.lay1, container, false);
TextView viewhello = (TextView) view.findViewById(R.id.tv_hello);
viewhello.setText(hello);
return view;
}
@Override
public void onDestroy() {
super.onDestroy();
Log.d(TAG, "TestFragment-----onDestroy");
}
}