Android ViewPager+；Seekbar同步

我想在Seekbar控件的帮助下实现ViewPager的伪拖动。为此，我尝试了以下代码，但它没有按我所希望的那样工作，请提供任何帮助，看看我使用的代码：

MainActivity.java }

activity_main.xml

您能不能也显示屏幕截图。。。你想要这样的东西吗？@navya我不能在我的问题中添加截图，因为我至少需要10份回购协议。但这是我想要的东西，正如你在youtube链接中所显示的，但以一种更加同步的方式tonny ok….等等..现在你可以添加截屏了为了更精确我需要所有的viewpager页面在搜索到最大位置时滚动，在这个视频中，搜索到最大位置时，只有一个页面滚动。
public class MainActivity extends FragmentActivity implements
    OnSeekBarChangeListener {
SeekBar fontSeekBar;
ViewPager viewPager;

int maxOffset;
int currentOffset;
ViewPagerAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    fontSeekBar = (SeekBar) findViewById(R.id.fontSeekBar);
    fontSeekBar.setOnSeekBarChangeListener(this);

    viewPager = (ViewPager) findViewById(R.id.pager);
    adapter = new ViewPagerAdapter(getSupportFragmentManager());
    viewPager.setAdapter(adapter);

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

@Override
public void onProgressChanged(SeekBar seekBar, int progress,
        boolean fromUser) {
    if (viewPager.isFakeDragging()) {
         int offset = (int) ((maxOffset / 100.0) * progress);

        int dragby = -1 * (offset - currentOffset);
        Log.d("DRAGBY", "" + progress);
        viewPager.fakeDragBy(dragby);

        currentOffset = offset;
    }

}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {
    // TODO Auto-generated method stub 

    maxOffset = viewPager.getWidth();

    viewPager.beginFakeDrag();
}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
    // TODO Auto-generated method stub
    viewPager.endFakeDrag();

    currentOffset = 0;

    seekBar.setProgress(0);
}

public class ViewPagerAdapter extends FragmentPagerAdapter {

    private final String[] TITLES = { "Map", "Details", "News" };

    public ViewPagerAdapter(FragmentManager fm) {
        super(fm);

    }

    @Override
    public Fragment getItem(int position) {

        Fragment fragment = null;
        switch (position) {
        case 0:
            fragment = new FirstFragment();
            break;
        case 1:
            fragment = new SecondFragment();
            break;
        case 2:
            fragment = new ThirdFragment();
            break;

        default:
            break;
        }

        return fragment;
    }

    @Override
    public float getPageWidth(int position) {
        return 1f;
    }

    @Override
    public int getCount() {
        return TITLES.length;
    }
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.seeknslide.MainActivity" >

<android.support.v4.view.ViewPager
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_weight="1" />

<SeekBar
    android:id="@+id/fontSeekBar"
    android:layout_width="320dp"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:layout_alignParentBottom="true"
    android:indeterminate="false"
    android:maxHeight="4dip"
    android:minHeight="4dip"
    android:progressDrawable="@drawable/progressbar" />
</RelativeLayout>