我可以将viewpager放入片段吗？

时间：2013-12-09 10:25:01

标签： android android-fragments android-viewpager

我想知道我可以在我创建的片段中放置一个包含13images的viewpager吗？

我现在创建了一个应用程序，其中包含7个片段标签，每个标签都显示自己的图像，webview以及每个片段中的一些内容。

所以现在我有一个问题，在我需要放入json的图像幻灯片中的1-3个选项卡中，我想知道是否可以使用viewpager来显示这些图像并将其放入片段中我的标签。

更新12/12/2013

好吧，经过几天的尝试，我想出了这个代码。不幸的是，它没有按照我的计划工作。最初我使用asynctask为diff项目上的图像加载json解析。当我尝试组合时json项目与我的片段项目，我删除了asyctask，因为我不知道如何一起实现.Below是我的代码和错误，我知道网络IO正在尝试访问主线程但我不知道如何解决它。非常感谢任何帮助。

MainActivity 

public class MainActivity extends FragmentActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    requestWindowFeature(Window.FEATURE_NO_TITLE);  
    super.onCreate(savedInstanceState);     
    setContentView(R.layout.main);


    FragmentTabHost tabHost = (FragmentTabHost)findViewById(android.R.id.tabhost);
    tabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
    //1
    tabHost.addTab(tabHost.newTabSpec("Highlight").setIndicator("Highlight"), 
                  AppleFragment.class, null);
         ...
    //4
    tabHost.addTab(tabHost.newTabSpec("Gallery").setIndicator("Gallery"), 
                  GalleryFragment.class,  null);

GalleryFragment 

public class GalleryFragment extends Fragment{
    private ViewPager mPager;
    private PagerAdapter mPagerAdapter;

    @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.fragment_pager, container,false);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        mPager = (ViewPager) view.findViewById(R.id.pager);
        mPagerAdapter = new CustomPagerAdapter(getChildFragmentManager());
        mPager.setAdapter(mPagerAdapter);
        mPager.setCurrentItem(0);
    }

ViewPagerPageFragment 

public class ViewPagerPageFragment extends Fragment{

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

    // url to make request
    private static String url = "http://vina.harvestcamasu.com/vina/xml/image.json";

    // JSON Node names
    static String TAG_IMAGE     = "Image";
    static String TAG_PICURL    = "PicURL";
    private String[] images = new String[13];
    ProgressDialog mProgressDialog;
    public Drawable d1,d2,d3,d4,d5,d6,d7,d8,d9,d10,d11,d12,d13;

    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        view.findViewById(R.id.imageView1);




                try {
                    // Do something...
                    Thread.sleep(5000);
                    JSONParser jParser = new JSONParser();
                    jParser.getJSONFromUrl(url);

                    // get Gallery JSONObject
                    JSONObject json = jParser.getJSONFromUrl(url);
                    // get Artist JSONObject
                    JSONObject json_gallery=json.getJSONObject("Gallery");
                    // get Image JSONArray
                    JSONObject json_artist=json_gallery.getJSONObject("Artist");


                    //getting array from image
                    JSONArray Image = null;
                    try {
                        Image = json_artist.getJSONArray(TAG_IMAGE);
                        for (int i = 0; i < Image.length(); i++) {

                            JSONObject m    = Image.getJSONObject(i);
                            images[i]       = m.getString("PicURL");


                        }
                        InputStream is1 = (InputStream) new URL(images[0]).getContent();
                        d1 = Drawable.createFromStream(is1, "src name");
                        .
                        .
                        .   
                        InputStream is13= (InputStream) new URL(images[12]).getContent();
                        d13= Drawable.createFromStream(is13, "src name");


                    } catch (JSONException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (MalformedURLException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }


                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                return ;

            }



    }

CustomPagerAdapter 

public class CustomPagerAdapter extends FragmentStatePagerAdapter {
public CustomPagerAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int position) {
    return new ViewPagerPageFragment();
}


private Drawable d1,d2,d3,d4,d5,d6,d7,d8,d9,d10,d11,d12,d13;


public void MyPagerAdapter( Drawable draw1, Drawable draw2,Drawable draw3,Drawable draw4,Drawable draw5,
        Drawable draw6,Drawable draw7,Drawable draw8,Drawable draw9,Drawable draw10,Drawable draw11,
        Drawable draw12,Drawable draw13){

    d1 = draw1;
    .
    .               
    d13= draw13;


}

public int getCount() {

    return 13;
}
public Object instantiateItem(View collection, int position) {
    LayoutInflater inflater = (LayoutInflater) collection.getContext()
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    int resId = R.layout.first_page;
    View view = inflater.inflate(resId, null);

    ImageView image1 = (ImageView)view.findViewById(R.id.imageView1);

    switch (position) {
    case 0:
         image1.setImageDrawable(d1);
        break;
    .
    .
    case 12:
         image1.setImageDrawable(d13);
           break;
    }

    ((ViewPager) collection).addView(view, 0);
    return view;
}

public void destroyItem(View arg0, int arg1, Object arg2) {
    ((ViewPager) arg0).removeView((View) arg2);
}

public boolean isViewFromObject(View arg0, Object arg1) {
    return arg0 == ((View) arg1);
}

public Parcelable saveState() {
    return null;
}
}

错误记录 

12-12 14:25:08.929: E/AndroidRuntime(9185): FATAL EXCEPTION: main
12-12 14:25:08.929: E/AndroidRuntime(9185): android.os.NetworkOnMainThreadException
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at java.net.InetAddress.getAllByName(InetAddress.java:220)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at com.tonycube.fragmenttabdemo.JSONParser.getJSONFromUrl(JSONParser.java:39)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at com.tonycube.fragmenttabdemo.ViewPagerPageFragment.onViewCreated(ViewPagerPageFragment.java:56)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:925)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:461)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.support.v4.view.ViewPager.populate(ViewPager.java:1064)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.support.v4.view.ViewPager.populate(ViewPager.java:911)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1432)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.View.measure(View.java:12892)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:594)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:376)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.View.measure(View.java:12892)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.View.measure(View.java:12892)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.View.measure(View.java:12892)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.LinearLayout.measureVertical(LinearLayout.java:812)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.LinearLayout.onMeasure(LinearLayout.java:553)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.View.measure(View.java:12892)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.View.measure(View.java:12892)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.View.measure(View.java:12892)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1375)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.LinearLayout.measureVertical(LinearLayout.java:660)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.LinearLayout.onMeasure(LinearLayout.java:553)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.View.measure(View.java:12892)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2257)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.View.measure(View.java:12892)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1240)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2628)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.os.Looper.loop(Looper.java:137)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at android.app.ActivityThread.main(ActivityThread.java:4512)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at java.lang.reflect.Method.invokeNative(Native Method)
12-12 14:25:08.929: E/AndroidRuntime(9185):     at java.lang.reflect.M

1 个答案:

答案 0 :(得分：0)

更新：我已经快速编写了一些示例代码，此代码不能很好地处理方向更改。这是你必须自己弄清楚的事情。有很多方法可以解决这个问题，我不能100％确定最理想的方法。这个示例代码可以帮助您入门。如果你想出了正确的方法来处理下方的方向更改评论或编辑这篇文章。

<强> MainActivity： 

public class MainActivity extends FragmentActivity {

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

        if (getSupportFragmentManager().findFragmentById(android.R.id.content) == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(android.R.id.content, new ViewPagerFragment())
                    .commit();
        }

    }

    @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;
    }

}

<强> ViewPagerFragment： 

public class ViewPagerFragment extends Fragment {

    private ViewPager mPager;
    private PagerAdapter mPagerAdapter;

    @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.fragment_pager, container,false);
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        mPager = (ViewPager) view.findViewById(R.id.pager);
        mPagerAdapter = new CustomPagerAdapter(getChildFragmentManager());
        mPager.setAdapter(mPagerAdapter);
    }

    private class CustomPagerAdapter extends FragmentStatePagerAdapter {
        public CustomPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            return new ViewPagerPageFragment();
        }

        @Override
        public int getCount() {
            return 10;
        }
    }

}

ViewPagerPageFragment：

public class ViewPagerPageFragment extends Fragment{

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

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        Random rnd = new Random(); 
        int color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));   
        view.findViewById(R.id.fragment_page_wrapper).setBackgroundColor(color);
    }

}
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