0
我正在制作一些带有viewpager片段的android应用程序。它显示标签正确，但我看不到我的代码中的任何内容。我试图找到和搜索在stackoverflow和谷歌，但我不知道为什么这个代码不工作。代码看起来很奇怪，我对此很抱歉。我是这里第一个问题。 THX帮我:-)android viewpager没有显示任何内容
这是MainActivity.java
package com.yeungnam.food;
import android.app.Activity;
import android.app.FragmentManager;
import android.app.Fragment;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends Activity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
CustomDrawerAdapter adapter;
List<DrawerItem> dataList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initializing
dataList = new ArrayList<DrawerItem>();
mTitle = mDrawerTitle = getTitle();
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
/* mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START); */
dataList.add(new DrawerItem(true));
dataList.add(new DrawerItem("Message", R.drawable.ic_action_camera));
dataList.add(new DrawerItem("Likes", R.drawable.ic_action_cloud));
dataList.add(new DrawerItem("Games", R.drawable.ic_action_email));
adapter = new CustomDrawerAdapter(this, R.layout.custom_drawer_item,
dataList);
mDrawerList.setAdapter(adapter);
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.drawer_open,
R.string.drawer_close) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
invalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
SelectItem(1);
}
}
public void SelectItem(int possition) {
Fragment fragment = null;
Bundle args = new Bundle();
switch (possition) {
case 1:
fragment = new FragmentFood();
/* args.putString(FragmentFood.ITEM_NAME, dataList.get(possition)
.getItemName());
args.putInt(FragmentFood.IMAGE_RESOURCE_ID, dataList.get(possition)
.getImgResID()); */
break;
case 2:
fragment = new FragmentFood();
/* args.putString(FragmentFood.ITEM_NAME, dataList.get(possition)
.getItemName());
args.putInt(FragmentFood.IMAGE_RESOURCE_ID, dataList.get(possition)
.getImgResID()); */
break;
case 3:
fragment = new FragmentFood();
/* args.putString(FragmentFood.ITEM_NAME, dataList.get(possition)
.getItemName());
args.putInt(FragmentFood.IMAGE_RESOURCE_ID, dataList.get(possition)
.getImgResID()); */
break;
default:
break;
}
fragment.setArguments(args);
FragmentManager frgManager = getFragmentManager();
frgManager.beginTransaction().replace(R.id.content_frame, fragment)
.commit();
mDrawerList.setItemChecked(possition, true);
setTitle(dataList.get(possition).getItemName());
mDrawerLayout.closeDrawer(mDrawerList);
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// The action bar home/up action should open or close the drawer.
// ActionBarDrawerToggle will take care of this.
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return false;
}
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
if(dataList.get(position).isFirst == false)
SelectItem(position);
}
}
@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);
} */
}
这是FragmentFood.java
package com.yeungnam.food;
import android.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.astuetz.PagerSlidingTabStrip;
public class FragmentFood extends Fragment {
private PagerSlidingTabStrip tabs;
private ViewPager pager;
private FoodAdapter adapter;
public FragmentFood() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_food, container,
false);
tabs = (PagerSlidingTabStrip) view.findViewById(R.id.tabs);
pager = (ViewPager) view.findViewById(R.id.pager);
adapter = new FoodAdapter(getActivity());
pager.setAdapter(adapter);
tabs.setViewPager(pager);
return view;
}
public class FoodAdapter extends PagerAdapter {
private final String[] TITLES = { "breafkast", "lunch", "dinner" };
private LayoutInflater mInflater;
public FoodAdapter(Context c) {
super(); mInflater = LayoutInflater.from(c);
}
@Override
public CharSequence getPageTitle(int position) {
return TITLES[position];
}
@Override
public int getCount() {
return TITLES.length;
}
@Override
public Object instantiateItem(ViewGroup pager, int position) {
// looks a little bit messy here
TextView v = new TextView(getActivity());
v.setBackgroundResource(R.color.background_window);
v.setText("PAGE " + (position + 1));
final int padding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 16, getResources()
.getDisplayMetrics());
v.setPadding(padding, padding, padding, padding);
v.setGravity(Gravity.CENTER);
pager.addView(v, 0);
return v;
}
@Override
public void destroyItem(ViewGroup container, int position, Object view) {
container.removeView((View) view);
}
@Override
public boolean isViewFromObject(View view, Object object) {
return false;
}
}
}