我在使用寻呼机作为导航Android应用程序。对于标签我有3个布局的内容。在片段中的一个是一个画廊，我想图像添加到它。为此，我必须设置一个ImageAdapter但我需要知道如何访问片段的内容。

 最后LayoutInflater厂= getLayoutInflater（）;
最终的视图中查看= factory.inflate（R.layout.pictures，NULL）;
画廊G =（图库论坛）view.findViewById（R.id.gallery1）;
g.setAdapter（新ImageAdapter（view.getContext（）））;
 

我用这个code以上的onCreate方法来从一个布局，不是内容查看画廊。 我得给一个上下文的ImageAdapter。但是，做什么方面，我有设置有？

编辑：这是我的完整code：

 包com.bw2801.uwelugemediathek;

进口java.util.Locale中;
进口android.app.ActionBar;
进口android.app.FragmentTransaction;
进口android.content.Context;
进口android.database.DataSetObserver;
进口android.os.Bundle;
进口android.support.v4.app.Fragment;
进口android.support.v4.app.FragmentActivity;
进口android.support.v4.app.FragmentManager;
进口android.support.v4.app.FragmentPagerAdapter;
进口android.support.v4.view.ViewPager;
进口android.util.Log;
进口android.view.LayoutInflater;
进口android.view.Menu;
进口android.view.View;
进口android.view.ViewGroup;
进口android.widget.AdapterView;
进口android.widget.AdapterView.OnItemClickListener;
进口android.widget.BaseAdapter;
进口android.widget.Gallery;
进口android.widget.ImageView;
进口android.widget.SpinnerAdapter;
进口android.widget.Toast;

公共类MainActivity扩展FragmentActivity工具
    ActionBar.TabListener {

SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
PicturesSectionFragment PS =新PicturesSectionFragment（）;

@覆盖
保护无效的onCreate（包savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_main）;

    //设置操作栏。
    最后的动作条动作条= getActionBar（）;
    actionBar.setNavigationMode（ActionBar.NAVIGATION_MODE_TABS）;

    //创建将返回一个片段为三个的适配器
    //应用程序的主要部分。
    mSectionsPagerAdapter =新SectionsPagerAdapter（
            getSupportFragmentManager（））;

    //设置的ViewPager与部分适配器。
    mViewPager =（ViewPager）findViewById（R.id.pager）;
    mViewPager.setAdapter（mSectionsPagerAdapter）;

    //当不同部分之间的刷卡，选择相应的
    //标签。我们也可以使用ActionBar.Tab＃选择（）要做到这一点，如果我们有
    //引用的标签。
    mViewPager
            .setOnPageChangeListener（新ViewPager.SimpleOnPageChangeListener（）{
                @覆盖
                公共无效onPageSelected（INT位置）{
                    actionBar.setSelectedNavigationItem（位置）;
                }
            }）;

    //对于每个应用程序的章节中，添加一个标签，操作栏。
    的for（int i = 0; I＆LT; mSectionsPagerAdapter.getCount（）;我++）{
        //创建与对应于由所定义的页标题文本标签
        //适配器。同时，指定此活动的对象，它实现
        //该TabListener界面，回调（监听程序）进行时
        //这个选项卡中选择。
        actionBar.addTab（actionBar.newTab（）
                .setText（mSectionsPagerAdapter.getPageTitle（I））
                .setTabListener（本））;
    }

    最后LayoutInflater厂= getLayoutInflater（）;
    最终的视图中查看= factory.inflate（R.layout.pictures，NULL）;
    画廊G =（图库论坛）view.findViewById（R.id.gallery1）;
    g.setAdapter（新ImageAdapter（ps.getActivity（）））;
}

公共类ImageAdapter扩展了BaseAdapter {
    私人语境mContext;

    私人整数[] mImageIds = {
            R.drawable.image01，
            R.drawable.image02，
            R.drawable.image03，
            R.drawable.image04，
            R.drawable.image05，
            R.drawable.image06，
            R.drawable.image07，
            R.drawable.image08，
    };

    公共ImageAdapter（上下文C）{
        mContext = C;
    }

    公众诠释getCount将（）{
        返回mImageIds.length;
    }

    公共对象的getItem（INT位置）{
        返回的位置;
    }

    众长getItemId（INT位置）{
        返回的位置;
    }

    公共查看getView（INT位置，查看convertView，ViewGroup中父）{
        ImageView的我=新ImageView的（mContext）;

        i.setImageResource（mImageIds [位置]）;
        i.setLayoutParams（新Gallery.LayoutParams（150，100））;
        i.setScaleType（ImageView.ScaleType.FIT_XY）;

        返回我;
    }
}

@覆盖
公共布尔onCreateOptionsMenu（功能菜单）{
    //充气菜单;这增加了项目操作栏，如果它是present。
    。getMenuInflater（）膨胀（R.menu.main，菜单）;
    返回true;
}

@覆盖
公共无效onTabSelected（ActionBar.Tab选项卡，
        FragmentTransaction fragmentTransaction）{
    //当选择给定的标签，切换到对应页面
    //该ViewPager。
    mViewPager.setCurrentItem（tab.getPosition（））;
}

@覆盖
公共无效onTabUnselected（ActionBar.Tab选项卡，
        FragmentTransaction fragmentTransaction）{
}

@覆盖
公共无效onTabReselected（ActionBar.Tab选项卡，
        FragmentTransaction fragmentTransaction）{
}

/ **
 * A {@link FragmentPagerAdapter}返回对应的片段
 *章节/标签/页之一。
 * /
公共类SectionsPagerAdapter扩展FragmentPagerAdapter {

    公共SectionsPagerAdapter（FragmentManager FM）{
        超（FM）;
    }

    @覆盖
    公共片段的getItem（INT位置）{
        开关（位置）{
            情况下0：
                返回新DummySectionFragment（）;
            情况1：
                返回新SoundSectionFragment（）;
            案例2：
                返回PS;
        }
        返回新DummySectionFragment（）;
    }

    @覆盖
    公众诠释getCount将（）{
        返回3;
    }

    @覆盖
    公共CharSequence的getPageTitle（INT位置）{
        开关（位置）{
        情况下0：
            回到信息详细信息;
        情况1：
            返回音板;
        案例2：
            返回画廊;
        }
        返回null;
    }
}

公共静态类DummySectionFragment扩展片段{

    公共DummySectionFragment（）{
    }

    @覆盖
    公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，捆绑savedInstanceState）{
        返回inflater.inflate（R.layout.info，集装箱，假）;
    }
}

公共静态类PicturesSectionFragment扩展片段{

    公共PicturesSectionFragment（）{
    }

    @覆盖
    公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，捆绑savedInstanceState）{
        返回inflater.inflate（R.layout.pictures，集装箱，假）;
    }
}

公共静态类SoundSectionFragment扩展片段{

    公共SoundSectionFragment（）{
    }

    @覆盖
    公共查看onCreateView（LayoutInflater充气，容器的ViewGroup，捆绑savedInstanceState）{
        返回inflater.inflate（R.layout.sounds，集装箱，假）;
    }
}
}
 

解决方案

您可以使用这样

  g.setAdapter（新ImageAdapter（getActivity（）））;
 

I have a android application using a pager as navigation. For the tabs I have 3 layouts as content. On one of the fragments is a gallery and I want to add images to it. For that I have to set an ImageAdapter but I need to know how to access the context of a fragment.

final LayoutInflater factory = getLayoutInflater();
final View view = factory.inflate(R.layout.pictures, null);
Gallery g = (Gallery) view.findViewById(R.id.gallery1);
g.setAdapter(new ImageAdapter(view.getContext()));

I use this code above in the onCreate method to get the gallery from a layout that is not the contentview. I have to give a Context to the ImageAdapter. But what context do I have to set there?

EDIT: This is my complete code:

package com.bw2801.uwelugemediathek;

import java.util.Locale;
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.content.Context;
import android.database.DataSetObserver;
import android.os.Bundle;
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.view.ViewPager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.SpinnerAdapter;
import android.widget.Toast;

public class MainActivity extends FragmentActivity implements
    ActionBar.TabListener {

SectionsPagerAdapter mSectionsPagerAdapter;
ViewPager mViewPager;
PicturesSectionFragment ps = new PicturesSectionFragment();

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

    // Set up the action bar.
    final ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // Create the adapter that will return a fragment for each of the three
    // primary sections of the app.
    mSectionsPagerAdapter = new SectionsPagerAdapter(
            getSupportFragmentManager());

    // Set up the ViewPager with the sections adapter.
    mViewPager = (ViewPager) findViewById(R.id.pager);
    mViewPager.setAdapter(mSectionsPagerAdapter);

    // When swiping between different sections, select the corresponding
    // tab. We can also use ActionBar.Tab#select() to do this if we have
    // a reference to the Tab.
    mViewPager
            .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
                @Override
                public void onPageSelected(int position) {
                    actionBar.setSelectedNavigationItem(position);
                }
            });

    // For each of the sections in the app, add a tab to the action bar.
    for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
        // Create a tab with text corresponding to the page title defined by
        // the adapter. Also specify this Activity object, which implements
        // the TabListener interface, as the callback (listener) for when
        // this tab is selected.
        actionBar.addTab(actionBar.newTab()
                .setText(mSectionsPagerAdapter.getPageTitle(i))
                .setTabListener(this));
    }

    final LayoutInflater factory = getLayoutInflater();
    final View view = factory.inflate(R.layout.pictures, null);
    Gallery g = (Gallery) view.findViewById(R.id.gallery1);
    g.setAdapter(new ImageAdapter(ps.getActivity()));
}

public class ImageAdapter extends BaseAdapter { 
    private Context mContext;

    private Integer[] mImageIds = {
            R.drawable.image01,
            R.drawable.image02,
            R.drawable.image03,
            R.drawable.image04,
            R.drawable.image05,
            R.drawable.image06,
            R.drawable.image07,
            R.drawable.image08,
    };

    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return mImageIds.length;
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView i = new ImageView(mContext);

        i.setImageResource(mImageIds[position]);
        i.setLayoutParams(new Gallery.LayoutParams(150, 100));
        i.setScaleType(ImageView.ScaleType.FIT_XY);

        return i;
    }
}

@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 void onTabSelected(ActionBar.Tab tab,
        FragmentTransaction fragmentTransaction) {
    // When the given tab is selected, switch to the corresponding page in
    // the ViewPager.
    mViewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabUnselected(ActionBar.Tab tab,
        FragmentTransaction fragmentTransaction) {
}

@Override
public void onTabReselected(ActionBar.Tab tab,
        FragmentTransaction fragmentTransaction) {
}

/**
 * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
 * one of the sections/tabs/pages.
 */
public class SectionsPagerAdapter extends FragmentPagerAdapter {

    public SectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        switch(position) {
            case 0:
                return new DummySectionFragment();
            case 1:
                return new SoundSectionFragment();
            case 2:
                return ps;
        }
        return new DummySectionFragment();
    }

    @Override
    public int getCount() {
        return 3;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        switch (position) {
        case 0:
            return "Informationen";
        case 1:
            return "Soundboard";
        case 2:
            return "Galerie";
        }
        return null;
    }
}

public static class DummySectionFragment extends Fragment {

    public DummySectionFragment() {
    }

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

public static class PicturesSectionFragment extends Fragment {

    public PicturesSectionFragment() {
    }

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

public static class SoundSectionFragment extends Fragment {

    public SoundSectionFragment() {
    }

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

you can use like this

g.setAdapter(new ImageAdapter(getActivity()));