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android 类似google Play Tab

2018年02月16日 ⁄ 综合 ⁄ 共 19281字 ⁄ 字号 评论关闭

最近要实现类似Google Play Tab效果,下面搜集一些问题,大家先看看问题以及回答

1、Android
- Google Play like tabs

2、ActionBar
and ActionBar.Tab and Navigation Drawer android

3、PagerSlidingTabStrip

4、https://github.com/Balaji-K13/Navigation-drawer-page-sliding-tab-strip

上面的1、2是问题,3、4是里面涉及的代码,文章中的代码主要根据4来改编的,因为4依赖第三方库,实现ActionBar功能,这里直接使用V7中的ActionBar.

一、主界面

package com.example.testnavigation;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.support.v4.widget.DrawerLayout;

public class MainActivity extends ActionBarActivity
        implements NavigationDrawerFragment.NavigationDrawerCallbacks {

    /**
     * Fragment managing the behaviors, interactions and presentation of the navigation drawer.
     */
    private NavigationDrawerFragment mNavigationDrawerFragment;

    /**
     * Used to store the last screen title. For use in {@link #restoreActionBar()}.
     */
    private CharSequence mTitle;

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

        mNavigationDrawerFragment = (NavigationDrawerFragment)
                getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
        mTitle = getTitle();

        // Set up the drawer.
        mNavigationDrawerFragment.setUp(
                R.id.navigation_drawer,
                (DrawerLayout) findViewById(R.id.drawer_layout));
    }

    @Override
    public void onNavigationDrawerItemSelected(int position) {
    	switch (position) {
		case 0:
			getSupportFragmentManager()
					.beginTransaction()
					.add(R.id.content,
							PageSlidingTabStripFragment.newInstance(),
							PageSlidingTabStripFragment.TAG).commit();
			break;
		default:
			Fragment fragment = new PlanetFragment();
			Bundle args = new Bundle();
			args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
			fragment.setArguments(args);

			getSupportFragmentManager().beginTransaction()
					.add(R.id.content, fragment).commit();
			break;
		}
    }

    public void onSectionAttached(int number) {
        switch (number) {
            case 1:
                mTitle = getString(R.string.title_section1);
                break;
            case 2:
                mTitle = getString(R.string.title_section2);
                break;
            case 3:
                mTitle = getString(R.string.title_section3);
                break;
        }
    }

    public void restoreActionBar() {
        ActionBar actionBar = getSupportActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
        actionBar.setDisplayShowTitleEnabled(true);
        actionBar.setTitle(mTitle);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        if (!mNavigationDrawerFragment.isDrawerOpen()) {
            // Only show items in the action bar relevant to this screen
            // if the drawer is not showing. Otherwise, let the drawer
            // decide what to show in the action bar.
            getMenuInflater().inflate(R.menu.main, menu);
            restoreActionBar();
            return true;
        }
        return super.onCreateOptionsMenu(menu);
    }

    @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);
    }

}

如果你升级ADT到最新的版本的话,新建项目的时候可以选择一个快速创建Navigation项目同时也会关联一个V7的库,这里就是在它的基础上来实现的,主要修改xml和onNavigationDrawerItemSelected方法,下面是xml的代码

<!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. -->
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.testnavigation.MainActivity" >

    <RelativeLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </RelativeLayout>

    <fragment
        android:id="@+id/navigation_drawer"
        android:name="com.example.testnavigation.NavigationDrawerFragment"
        android:layout_width="@dimen/navigation_drawer_width"
        android:layout_height="match_parent"
        android:layout_gravity="start" />

</android.support.v4.widget.DrawerLayout>

RelativeLayout作为内容显示容器,当用在自己的项目里的时候,主要覆写onNavigationDrawerItemSelected,根据position来显示不同的fragment,以前做项目的时候都是显示一个fragment之间的切换,现在需要添加一个ViewPager,要实现的做法就是把ViewPager放在一个fragment里面,把这个fragment作为切换,当然还需要继续优化,因为用过ViewPager的开发者知道ViewPager内容状态保持问题,ViewPager默认是保存2两个fragment的内容,但点击切换第三个的时候,第一个fragment的内容会释放,再次进入的时候会重新加载,这个问题的解决方法网上有很多,自己可以寻找。

第三个需要修改的是PageSlidingTabStripFragment用来存储ViewPager的Fragment,先看一下代码:

package com.example.testnavigation;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.astuetz.PagerSlidingTabStrip;

public class PageSlidingTabStripFragment extends Fragment {

	public static final String TAG = PageSlidingTabStripFragment.class
			.getSimpleName();

	public static PageSlidingTabStripFragment newInstance() {
		return new PageSlidingTabStripFragment();
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setRetainInstance(true);
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		return inflater.inflate(R.layout.pager, container, false);
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
		super.onViewCreated(view, savedInstanceState);

		PagerSlidingTabStrip tabs = (PagerSlidingTabStrip) view
				.findViewById(R.id.tabs);
		ViewPager pager = (ViewPager) view.findViewById(R.id.pager);
		MyPagerAdapter adapter = new MyPagerAdapter(getChildFragmentManager());
		pager.setAdapter(adapter);
		tabs.setViewPager(pager);

	}

	public class MyPagerAdapter extends FragmentPagerAdapter {

		public MyPagerAdapter(android.support.v4.app.FragmentManager fm) {
			super(fm);
		}

		private final String[] TITLES = { "Categories", "Home", "Top Paid",
				"Top Free" };

		@Override
		public CharSequence getPageTitle(int position) {
			return TITLES[position];
		}

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

		@Override
		public Fragment getItem(int position) {
			return SuperAwesomeCardFragment.newInstance(position);
		}

	}


}

我们需要修改是MyPagerAdapter,根据自己的项目需要修改,这里面会用到PagerSlidingTabStrip,这个是自定义的Tab,需要注意的是PagerSlidingTabStrip里面已经使用了ViewPager的OnPageChangeListener,所以当你想要自定义ViewPager的OnPageChangeListener的时候是不起作用的,需要用PagerSlidingTabStrip的OnPageChangeListener。代码如下:

package com.astuetz;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Typeface;
import android.os.Build;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.HorizontalScrollView;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.Locale;

import com.example.testnavigation.R;

public class PagerSlidingTabStrip extends HorizontalScrollView {

	public interface IconTabProvider {
		public int getPageIconResId(int position);
	}

	// @formatter:off
	private static final int[] ATTRS = new int[] {
		android.R.attr.textSize,
		android.R.attr.textColor
    };
	// @formatter:on

	private LinearLayout.LayoutParams defaultTabLayoutParams;
	private LinearLayout.LayoutParams expandedTabLayoutParams;

	private final PageListener pageListener = new PageListener();
	public OnPageChangeListener delegatePageListener;

	private LinearLayout tabsContainer;
	private ViewPager pager;

	private int tabCount;

	private int currentPosition = 0;
	private float currentPositionOffset = 0f;

	private Paint rectPaint;
	private Paint dividerPaint;

	private int indicatorColor = 0xFF666666;
	private int underlineColor = 0x1A000000;
	private int dividerColor = 0x1A000000;

	private boolean shouldExpand = false;
	private boolean textAllCaps = true;

	private int scrollOffset = 52;
	private int indicatorHeight = 8;
	private int underlineHeight = 2;
	private int dividerPadding = 12;
	private int tabPadding = 24;
	private int dividerWidth = 1;

	private int tabTextSize = 12;
	private int tabTextColor = 0xFF666666;
	private Typeface tabTypeface = null;
	private int tabTypefaceStyle = Typeface.BOLD;

	private int lastScrollX = 0;

	private int tabBackgroundResId = R.drawable.background_tab;

	private Locale locale;

	public PagerSlidingTabStrip(Context context) {
		this(context, null);
	}

	public PagerSlidingTabStrip(Context context, AttributeSet attrs) {
		this(context, attrs, 0);
	}

	public PagerSlidingTabStrip(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);

		setFillViewport(true);
		setWillNotDraw(false);

		tabsContainer = new LinearLayout(context);
		tabsContainer.setOrientation(LinearLayout.HORIZONTAL);
		tabsContainer.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
		addView(tabsContainer);

		DisplayMetrics dm = getResources().getDisplayMetrics();

		scrollOffset = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, scrollOffset, dm);
		indicatorHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, indicatorHeight, dm);
		underlineHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, underlineHeight, dm);
		dividerPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerPadding, dm);
		tabPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, tabPadding, dm);
		dividerWidth = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerWidth, dm);
		tabTextSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, tabTextSize, dm);

		// get system attrs (android:textSize and android:textColor)

		TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);

		tabTextSize = a.getDimensionPixelSize(0, tabTextSize);
		tabTextColor = a.getColor(1, tabTextColor);

		a.recycle();

		// get custom attrs

		a = context.obtainStyledAttributes(attrs, R.styleable.PagerSlidingTabStrip);

		indicatorColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsIndicatorColor, indicatorColor);
		underlineColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsUnderlineColor, underlineColor);
		dividerColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsDividerColor, dividerColor);
		indicatorHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsIndicatorHeight, indicatorHeight);
		underlineHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsUnderlineHeight, underlineHeight);
		dividerPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsDividerPadding, dividerPadding);
		tabPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsTabPaddingLeftRight, tabPadding);
		tabBackgroundResId = a.getResourceId(R.styleable.PagerSlidingTabStrip_pstsTabBackground, tabBackgroundResId);
		shouldExpand = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsShouldExpand, shouldExpand);
		scrollOffset = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsScrollOffset, scrollOffset);
		textAllCaps = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsTextAllCaps, textAllCaps);

		a.recycle();

		rectPaint = new Paint();
		rectPaint.setAntiAlias(true);
		rectPaint.setStyle(Style.FILL);

		dividerPaint = new Paint();
		dividerPaint.setAntiAlias(true);
		dividerPaint.setStrokeWidth(dividerWidth);

		defaultTabLayoutParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
		expandedTabLayoutParams = new LinearLayout.LayoutParams(0, LayoutParams.MATCH_PARENT, 1.0f);

		if (locale == null) {
			locale = getResources().getConfiguration().locale;
		}
	}

	public void setViewPager(ViewPager pager) {
		this.pager = pager;

		if (pager.getAdapter() == null) {
			throw new IllegalStateException("ViewPager does not have adapter instance.");
		}

		pager.setOnPageChangeListener(pageListener);

		notifyDataSetChanged();
	}

	public void setOnPageChangeListener(OnPageChangeListener listener) {
		this.delegatePageListener = listener;
	}

	public void notifyDataSetChanged() {

		tabsContainer.removeAllViews();

		tabCount = pager.getAdapter().getCount();

		for (int i = 0; i < tabCount; i++) {

			if (pager.getAdapter() instanceof IconTabProvider) {
				addIconTab(i, ((IconTabProvider) pager.getAdapter()).getPageIconResId(i));
			} else {
				addTextTab(i, pager.getAdapter().getPageTitle(i).toString());
			}

		}

		updateTabStyles();

		getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

			@SuppressWarnings("deprecation")
			@SuppressLint("NewApi")
			@Override
			public void onGlobalLayout() {

				if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
					getViewTreeObserver().removeGlobalOnLayoutListener(this);
				} else {
					getViewTreeObserver().removeOnGlobalLayoutListener(this);
				}

				currentPosition = pager.getCurrentItem();
				scrollToChild(currentPosition, 0);
			}
		});

	}

	private void addTextTab(final int position, String title) {

		TextView tab = new TextView(getContext());
		tab.setText(title);
		tab.setGravity(Gravity.CENTER);
		tab.setSingleLine();

		addTab(position, tab);
	}

	private void addIconTab(final int position, int resId) {

		ImageButton tab = new ImageButton(getContext());
		tab.setImageResource(resId);

		addTab(position, tab);

	}

	private void addTab(final int position, View tab) {
		tab.setFocusable(true);
		tab.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				pager.setCurrentItem(position);
			}
		});

		tab.setPadding(tabPadding, 0, tabPadding, 0);
		tabsContainer.addView(tab, position, shouldExpand ? expandedTabLayoutParams : defaultTabLayoutParams);
	}

	private void updateTabStyles() {

		for (int i = 0; i < tabCount; i++) {

			View v = tabsContainer.getChildAt(i);

			v.setBackgroundResource(tabBackgroundResId);

			if (v instanceof TextView) {

				TextView tab = (TextView) v;
				tab.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize);
				tab.setTypeface(tabTypeface, tabTypefaceStyle);
				tab.setTextColor(tabTextColor);

				// setAllCaps() is only available from API 14, so the upper case is made manually if we are on a
				// pre-ICS-build
				if (textAllCaps) {
					if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
						tab.setAllCaps(true);
					} else {
						tab.setText(tab.getText().toString().toUpperCase(locale));
					}
				}
			}
		}

	}

	private void scrollToChild(int position, int offset) {

		if (tabCount == 0) {
			return;
		}

		int newScrollX = tabsContainer.getChildAt(position).getLeft() + offset;

		if (position > 0 || offset > 0) {
			newScrollX -= scrollOffset;
		}

		if (newScrollX != lastScrollX) {
			lastScrollX = newScrollX;
			scrollTo(newScrollX, 0);
		}

	}

	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);

		if (isInEditMode() || tabCount == 0) {
			return;
		}

		final int height = getHeight();

		// draw indicator line

		rectPaint.setColor(indicatorColor);

		// default: line below current tab
		View currentTab = tabsContainer.getChildAt(currentPosition);
		float lineLeft = currentTab.getLeft();
		float lineRight = currentTab.getRight();

		// if there is an offset, start interpolating left and right coordinates between current and next tab
		if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {

			View nextTab = tabsContainer.getChildAt(currentPosition + 1);
			final float nextTabLeft = nextTab.getLeft();
			final float nextTabRight = nextTab.getRight();

			lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
			lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
		}

		canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);

		// draw underline

		rectPaint.setColor(underlineColor);
		canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);

		// draw divider

		dividerPaint.setColor(dividerColor);
		for (int i = 0; i < tabCount - 1; i++) {
			View tab = tabsContainer.getChildAt(i);
			canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
		}
	}

	private class PageListener implements OnPageChangeListener {

		@Override
		public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

			currentPosition = position;
			currentPositionOffset = positionOffset;

			scrollToChild(position, (int) (positionOffset * tabsContainer.getChildAt(position).getWidth()));

			invalidate();

			if (delegatePageListener != null) {
				delegatePageListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
			}
		}

		@Override
		public void onPageScrollStateChanged(int state) {
			if (state == ViewPager.SCROLL_STATE_IDLE) {
				scrollToChild(pager.getCurrentItem(), 0);
			}

			if (delegatePageListener != null) {
				delegatePageListener.onPageScrollStateChanged(state);
			}
		}

		@Override
		public void onPageSelected(int position) {
			if (delegatePageListener != null) {
				delegatePageListener.onPageSelected(position);
			}
		}

	}

	public void setIndicatorColor(int indicatorColor) {
		this.indicatorColor = indicatorColor;
		invalidate();
	}

	public void setIndicatorColorResource(int resId) {
		this.indicatorColor = getResources().getColor(resId);
		invalidate();
	}

	public int getIndicatorColor() {
		return this.indicatorColor;
	}

	public void setIndicatorHeight(int indicatorLineHeightPx) {
		this.indicatorHeight = indicatorLineHeightPx;
		invalidate();
	}

	public int getIndicatorHeight() {
		return indicatorHeight;
	}

	public void setUnderlineColor(int underlineColor) {
		this.underlineColor = underlineColor;
		invalidate();
	}

	public void setUnderlineColorResource(int resId) {
		this.underlineColor = getResources().getColor(resId);
		invalidate();
	}

	public int getUnderlineColor() {
		return underlineColor;
	}

	public void setDividerColor(int dividerColor) {
		this.dividerColor = dividerColor;
		invalidate();
	}

	public void setDividerColorResource(int resId) {
		this.dividerColor = getResources().getColor(resId);
		invalidate();
	}

	public int getDividerColor() {
		return dividerColor;
	}

	public void setUnderlineHeight(int underlineHeightPx) {
		this.underlineHeight = underlineHeightPx;
		invalidate();
	}

	public int getUnderlineHeight() {
		return underlineHeight;
	}

	public void setDividerPadding(int dividerPaddingPx) {
		this.dividerPadding = dividerPaddingPx;
		invalidate();
	}

	public int getDividerPadding() {
		return dividerPadding;
	}

	public void setScrollOffset(int scrollOffsetPx) {
		this.scrollOffset = scrollOffsetPx;
		invalidate();
	}

	public int getScrollOffset() {
		return scrollOffset;
	}

	public void setShouldExpand(boolean shouldExpand) {
		this.shouldExpand = shouldExpand;
		requestLayout();
	}

	public boolean getShouldExpand() {
		return shouldExpand;
	}

	public boolean isTextAllCaps() {
		return textAllCaps;
	}

	public void setAllCaps(boolean textAllCaps) {
		this.textAllCaps = textAllCaps;
	}

	public void setTextSize(int textSizePx) {
		this.tabTextSize = textSizePx;
		updateTabStyles();
	}

	public int getTextSize() {
		return tabTextSize;
	}

	public void setTextColor(int textColor) {
		this.tabTextColor = textColor;
		updateTabStyles();
	}

	public void setTextColorResource(int resId) {
		this.tabTextColor = getResources().getColor(resId);
		updateTabStyles();
	}

	public int getTextColor() {
		return tabTextColor;
	}

	public void setTypeface(Typeface typeface, int style) {
		this.tabTypeface = typeface;
		this.tabTypefaceStyle = style;
		updateTabStyles();
	}

	public void setTabBackground(int resId) {
		this.tabBackgroundResId = resId;
	}

	public int getTabBackground() {
		return tabBackgroundResId;
	}

	public void setTabPaddingLeftRight(int paddingPx) {
		this.tabPadding = paddingPx;
		updateTabStyles();
	}

	public int getTabPaddingLeftRight() {
		return tabPadding;
	}

	@Override
	public void onRestoreInstanceState(Parcelable state) {
		SavedState savedState = (SavedState) state;
		super.onRestoreInstanceState(savedState.getSuperState());
		currentPosition = savedState.currentPosition;
		requestLayout();
	}

	@Override
	public Parcelable onSaveInstanceState() {
		Parcelable superState = super.onSaveInstanceState();
		SavedState savedState = new SavedState(superState);
		savedState.currentPosition = currentPosition;
		return savedState;
	}

	static class SavedState extends BaseSavedState {
		int currentPosition;

		public SavedState(Parcelable superState) {
			super(superState);
		}

		private SavedState(Parcel in) {
			super(in);
			currentPosition = in.readInt();
		}

		@Override
		public void writeToParcel(Parcel dest, int flags) {
			super.writeToParcel(dest, flags);
			dest.writeInt(currentPosition);
		}

		public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
			@Override
			public SavedState createFromParcel(Parcel in) {
				return new SavedState(in);
			}

			@Override
			public SavedState[] newArray(int size) {
				return new SavedState[size];
			}
		};
	}

}

下面看一下效果图:

代码地址:http://download.csdn.net/detail/jwzhangjie/7410267




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